CN102817602B - online profile control method and device for polymer flooding oil field - Google Patents
online profile control method and device for polymer flooding oil field Download PDFInfo
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- CN102817602B CN102817602B CN201210320311.7A CN201210320311A CN102817602B CN 102817602 B CN102817602 B CN 102817602B CN 201210320311 A CN201210320311 A CN 201210320311A CN 102817602 B CN102817602 B CN 102817602B
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- 229920000642 polymer Polymers 0.000 title claims abstract description 236
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000000243 solution Substances 0.000 claims abstract description 276
- 239000007788 liquid Substances 0.000 claims abstract description 138
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 108
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims description 80
- 230000008569 process Effects 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000005070 sampling Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 11
- 230000001174 ascending effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000002981 blocking agent Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010010 raising Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
An on-line profile control method and device for a polymer flooding field, wherein the on-line profile control device for the polymer flooding field comprises: a polymer solution injection line having an inlet end and an outlet end; the annular liquid mixer is connected with the polymer solution injection pipeline in parallel, a liquid inlet bell mouth and a liquid outlet bell mouth are respectively arranged at two ends of the annular liquid mixer, the liquid inlet bell mouth and the inlet end are respectively connected with a polymer solution liquid inlet pipeline, and the liquid outlet bell mouth and the outlet end are respectively connected with a mixed liquid outlet pipeline; and the cross-linking agent solution liquid inlet pipeline is connected to the inner annular wall of the annular liquid mixer, and one end of the cross-linking agent solution liquid inlet pipeline, which extends into the annular liquid mixer, is opposite to the liquid inlet bell mouth. The polymer flooding oil field on-line profile control method and the polymer flooding oil field on-line profile control device can improve the polymer flooding effect of the polymer flooding oil field, realize the on-line profile control treatment of the polymer flooding oil field, and effectively prevent the viscosity of a polymer solution from being reduced due to the shearing action.
Description
Technical field
The present invention has about a kind of oil field profile control method and device, especially have about in a kind of Oil-Gas Field Development Engineering technical field in order to improve the online profile control method in polymer flooding oil field and the device of polymer flooding oil field oil recovery factor.
Background technology
At present, the large oilfield of China, as Daqing oil field, the east oilfields such as Shengli Oil Field have entered all develops latter stage, output has successively decreasing in various degree, and incremental reserves increases more and more slower, and exploration cost and difficulty are also increasing, therefore control moisture, stablize current crude output, maximum raising ultimate recovery, being utilized and being developed of economical rationality, very important effect is had to whole petroleum industry, and tertiary oil recovery technology is the technology that can reach this requirement so far, in tertiary oil recovery technology, chemical flooding technology occupies center-stage, effectively the most ripe with technique of polymer flooding again in chemical flooding.The mechanism of polymer flooding is exactly add high molecular polymer at injection water, and increase displacing phase viscosity, adjustment intake profile, increases displacing phase swept volume, thus improves ultimate recovery.
Polymer flooding oil field is because well spacing is large, oil reservoir is thick, the number of plies is many, non-homogeneity is serious, and polymer solution scurries into oil well along high permeability zone, causes sweep efficiency not high, thus reduce the development effectiveness of polymer flooding, fundamentally to address this problem, the way of profile control and water plugging just must be adopted to improve intake profile, improve water drive sweep efficiency, namely, adopt polymer solution and cross-linking agent solution mixing, make the two mixed solution inject oil reservoir, to carry out heavy dose of deep profile controlling.
In prior art, need first in water injection well, to inject a certain amount of polymer solution, in water injection well, a certain amount of blocking agent is injected (namely again according to actual Flooding Efficiency, the mixed liquor of polymer solution and cross-linking agent solution), adopt this method for implanting, after note need being stopped to the polymer solution injected in advance, to reinject blocking agent, its defect is the object that can not realize online injection blocking agent, and this kind method for implanting operation is loaded down with trivial details, operational discharge capacity large, can not reach the object of deep profile controlling or transfer drive; On the other hand, due to the mixer for liquid mixed polymer solution and cross-linking agent solution, mainly by the multiple guide vanes be arranged on mixing drum internal perisporium, polymer solution and cross-linking agent solution are mixed, due to the viscosity differences of polymer solution and cross-linking agent solution comparatively large (viscosity of polymer solution normally cross-linking agent solution viscosity 100 ~ 200 times), when the two flows downward along mixing drum, polymer solution is different with the flow velocity of cross-linking agent solution, and the two is difficult to mixing full and uniform in mixing drum; In addition, polymer solution is in turbulent condition, its flow velocity is very fast, the guide vane be arranged on mixing drum internal perisporium can have certain shear action to the mixed liquor of polymer solution and cross-linking agent solution, the mixed liquor of polymer solution and cross-linking agent solution causes viscosity to reduce due to shear action, thus causes the profile control effect of mixed liquor to oil reservoir finally prepared undesirable.
Therefore, be necessary to provide a kind of new polymer flooding oil field profile control method and device, overcome above-mentioned defect.
Summary of the invention
The object of this invention is to provide the online profile control device in a kind of polymer flooding oil field, this device can improve polymer flooding oil field oil displacement effect of polymer, realize the online profile control process in polymer flooding oil field, and viscosity reduces because of shear action effectively to prevent polymer solution.
Another object of the present invention is to provide the online profile control method in a kind of polymer flooding oil field, the method effectively can improve the oil displacement effect of polymer in polymer flooding oil field, realize the online profile control process in polymer flooding oil field, and viscosity reduces because of shear action effectively to prevent polymer solution.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides the online profile control device in a kind of polymer flooding oil field, the online profile control device in described polymer flooding oil field comprises:
Polymer solution injects pipeline, and it has arrival end and the port of export;
Annular mixer for liquid, itself and described polymer solution ascending pipe line parallel are arranged, the two ends of described annular mixer for liquid are respectively equipped with feed liquor horn mouth and fluid horn mouth, described feed liquor horn mouth and described arrival end are connected with a polymer solution feed liquor pipeline respectively, and described fluid horn mouth and the described port of export are connected with a mixed liquor fluid pipeline respectively;
Cross-linking agent solution feed liquor pipeline, it is connected on the internal ring wall of described annular mixer for liquid, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular mixer for liquid is relative with described feed liquor horn mouth.
In a preferred embodiment, described annular mixer for liquid has annular container cavity, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular container cavity is connected with shower nozzle, and described shower nozzle is relative with described feed liquor horn mouth.
In a preferred embodiment, described shower nozzle is spherical shower nozzle, offer in the side that described shower nozzle is relative with described feed liquor horn mouth multiple go out fluid through-hole.
In a preferred embodiment, the diameter going out fluid through-hole described in is 1 ~ 2mm.
In a preferred embodiment, described polymer solution feed liquor pipeline is connected with polymer solution flow meter and feed liquor unidirectional stop valve.
In a preferred embodiment, the feed liquor horn mouth of described annular mixer for liquid is connected with described polymer solution feed liquor pipeline by polymer solution unidirectional stop valve, and the fluid horn mouth of described annular mixer for liquid is connected with described mixed liquor fluid pipeline by mixed liquor unidirectional stop valve.
In a preferred embodiment, described polymer solution injects on pipeline and is connected with unidirectional stop valve.
In a preferred embodiment, described mixed liquor fluid pipeline is connected with fluid unidirectional stop valve.
In a preferred embodiment, described cross-linking agent solution feed liquor pipeline is connected with cross-linking agent solution unidirectional stop valve, cross-linking agent solution flow meter and high pressure resistant measuring pump.
In a preferred embodiment, described mixed liquor fluid pipeline is connected with sampling and detects pipeline.
The present invention also provides a kind of polymer flooding oil field online profile control method, and the online profile control method in described polymer flooding oil field comprises the steps:
A) polymer solution is provided to inject pipeline and an annular mixer for liquid, described polymer solution injects pipeline and described annular mixer for liquid is arranged in parallel, the two ends of described annular mixer for liquid are respectively equipped with feed liquor horn mouth and fluid horn mouth, the arrival end that described feed liquor horn mouth injects pipeline with described polymer solution is connected with a polymer solution feed liquor pipeline respectively, the port of export that described fluid horn mouth injects pipeline with described polymer solution is connected with a mixed liquor fluid pipeline respectively, the internal ring wall of described annular mixer for liquid is connected with cross-linking agent solution feed liquor pipeline, one end that described crosslinking agent feed liquor pipeline stretches into described annular mixer for liquid is relative with described feed liquor horn mouth,
B) to injection of polymer solution in described polymer solution feed liquor pipeline, in the process of injection of polymer solution, described annular mixer for liquid is in closed condition, and described polymer solution enters mixed liquor fluid pipeline by described polymer solution ascending pipe linear flow, then injects water injection well;
C) described annular mixer for liquid is opened, close described polymer solution and inject pipeline, cross-linking agent solution is injected in described cross-linking agent solution feed liquor pipeline, described polymer solution and described cross-linking agent solution mix in described annular mixer for liquid, and the mixed liquor generated after the two mixing injects water injection well from described mixed liquor fluid pipeline;
D) close described annular mixer for liquid, open described polymer solution and inject pipeline, normal polymerization thing drives production.
In a preferred embodiment, between described step c) and described step d), also comprise step c1): close described annular mixer for liquid, closing well is carried out to described water injection well and waits solidifying.
In a preferred embodiment, solidifying 5 days are waited to described water injection well closing well.
In a preferred embodiment, described mixed liquor fluid pipeline is connected with sampling and detects pipeline, in described step c), open described sampling and detect pipeline, sampling detection is carried out to the described mixed liquor that the fluid horn mouth from described annular mixer for liquid flows out.
In a preferred embodiment, described annular mixer for liquid has annular container cavity, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular container cavity is connected with shower nozzle, and described shower nozzle is relative with described feed liquor horn mouth.
In a preferred embodiment, described shower nozzle is spherical shower nozzle, offer in the side that described shower nozzle is relative with described feed liquor horn mouth multiple go out fluid through-hole.
In a preferred embodiment, the diameter going out fluid through-hole described in is 1 ~ 2mm.
In a preferred embodiment, described polymer solution feed liquor pipeline is connected with polymer solution flow meter, described cross-linking agent solution feed liquor pipeline is connected with cross-linking agent solution flow meter, and the ratio of the reading of described polymer solution flow meter and the reading of described cross-linking agent solution flow meter is 10:1.
Feature and the advantage of the online profile control method in polymer flooding oil field of the present invention and device are: inject being arranged in parallel of pipeline and annular mixer for liquid by polymer solution, the online profile control process of polymer solution can be realized, also be, can Configuration Online need to carry out the polymer solution of profile control process and the mixed liquor of cross-linking agent solution to oil reservoir without the need to stopping polymer waterflooding, its technique is simple, easy to operate.In addition, the one end stretched in annular mixer for liquid because of cross-linking agent solution feed liquor pipeline is relative with feed liquor horn mouth, also be, the flow direction of the polymer solution injected from the feed liquor horn mouth of annular mixer for liquid is injected into the cross-linking agent solution in annular mixer for liquid just flow direction with self-crosslinking agent solution feed liquor pipeline is contrary, therefore, polymer solution and cross-linking agent solution can mix at the feed liquor horn mouth place of annular mixer for liquid, the two flow in the bell-mouthed process of fluid from the feed liquor horn mouth of annular mixer for liquid also can carry out mixing full and uniform further, this annular mixer for liquid can effectively prevent polymer solution from causing because of shear action reducing viscosity, the mixed liquor prepared by this annular mixer for liquid can play good profile control effect to oil reservoir.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the online profile control device in polymer flooding oil field of the present invention.
Fig. 2 is the structure chart of the annular mixer for liquid of the online profile control device in polymer flooding oil field of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1, the invention provides the online profile control device in a kind of polymer flooding oil field, it comprises polymer solution and injects pipeline 1, annular mixer for liquid 2 and cross-linking agent solution feed liquor pipeline 3.Wherein: polymer solution injects pipeline 1 and has arrival end 11 and the port of export 12; Annular mixer for liquid 2 injects pipeline 1 with described polymer solution and is arranged in parallel, the two ends of described annular mixer for liquid 2 are respectively equipped with feed liquor horn mouth 21 and fluid horn mouth 22, described feed liquor horn mouth 21 and described arrival end 11 are connected with a polymer solution feed liquor pipeline 4 respectively, and described fluid horn mouth 22 and the described port of export 12 are connected with a mixed liquor fluid pipeline 5 respectively; Cross-linking agent solution feed liquor pipeline 3 is connected on the internal ring wall of described annular mixer for liquid 2, and one end that described cross-linking agent solution feed liquor pipeline 3 stretches into described annular mixer for liquid 2 is relative with described feed liquor horn mouth 21.
Specifically, the arrival end 11 that polymer solution injects pipeline 1 is connected with the feed liquor horn mouth 12 of annular mixer for liquid 2, and the two is connected with polymer solution feed liquor pipeline 4 jointly; The port of export 12 that polymer solution injects pipeline 1 is connected with the fluid horn mouth 22 of annular mixer for liquid 2, and the two is connected with mixed liquor fluid pipeline 5 jointly.Polymer solution flows into polymer solution respectively by polymer solution feed liquor pipeline 4 and injects in pipeline 1 and annular mixer for liquid 2, the polymer solution of the port of export 12 outflow of autohemagglutination compound solution injection tube line 1 and all can flowing in water injection well from mixed liquor fluid pipeline 5 from the mixed liquor that the fluid horn mouth 22 of annular mixer for liquid 2 flows out.This polymer solution injects pipeline 1 for providing polymer flooding oil field normal polymer flooding process.
Annular mixer for liquid 2 is substantially in elliptical ring annular shape, feed liquor horn mouth 21 and fluid horn mouth 22 are opened in the two ends at elliptical ring annular mixer for liquid 2 major axis place, annular mixer for liquid 2 injects pipeline 1 with polymer solution and is arranged in parallel, cross-linking agent solution feed liquor pipeline 3 is connected on the internal ring wall of annular mixer for liquid 2, cross-linking agent solution is injected into annular mixer for liquid 2 by cross-linking agent solution feed liquor pipeline 3, and mix with autohemagglutination polymer solution feed liquor pipeline 4 polymer solution be injected in annular mixer for liquid 2, and generate the mixed liquor being used for oil reservoir being carried out to profile control process, this mixed liquor to flow in mixed liquor fluid pipeline 5 from the fluid horn mouth 22 of annular mixer for liquid 2 and flows in water injection well.
The present invention is when carrying out polymer flooding to oil reservoir, first, open polymer solution and inject pipeline 1, now annular mixer for liquid 2 is in closed condition, injection of polymer solution in polymer solution feed liquor pipeline 4, this polymer solution autohemagglutination polymer solution feed liquor pipeline 4 flows into polymer solution and injects in pipeline 1, and then flows out from mixed liquor fluid pipeline 5 and inject water injection well, when needs carry out profile control process to oil reservoir, open annular mixer for liquid 2, close polymer solution and inject pipeline 1, now in cross-linking agent solution feed liquor pipeline 3, inject cross-linking agent solution, because polymer solution injects pipeline 1 with annular mixer for liquid 2 for being arranged in parallel, after closedown polymer solution injects pipeline 1, the polymer solution flowed in autohemagglutination polymer solution feed liquor pipeline 4 can flow in annular mixer for liquid 2, mix with the cross-linking agent solution be injected in annular mixer for liquid 2 in self-crosslinking agent solution feed liquor pipeline 3, polymer solution fully mixes with feed liquor horn mouth 21 place of cross-linking agent solution at annular mixer for liquid 2, and flow through annular mixer for liquid 2 with after carrying out Homogeneous phase mixing, finally flow into mixed liquor fluid pipeline 5 from fluid horn mouth 22 and then inject water injection well, complete the profile control process to down-hole oil reservoir.
The online profile control device in polymer flooding oil field of the present invention, being arranged in parallel of pipeline 1 and annular mixer for liquid 2 is injected by polymer solution, the online profile control process of polymer solution can be realized, also be, can Configuration Online need to carry out the polymer solution of profile control process and the mixed liquor of cross-linking agent solution to oil reservoir without the need to stopping polymer waterflooding, its technique is simple, easy to operate.In addition, the one end stretched in annular mixer for liquid 2 because of cross-linking agent solution feed liquor pipeline 3 is relative with feed liquor horn mouth 21, also be, the flow direction of the polymer solution injected from the feed liquor horn mouth 21 of annular mixer for liquid 2 is injected into the cross-linking agent solution in annular mixer for liquid 2 just flow direction with self-crosslinking agent solution feed liquor pipeline 3 is contrary, therefore, polymer solution and cross-linking agent solution can mix at feed liquor horn mouth 21 place of annular mixer for liquid 2, the two flow in the process of fluid horn mouth 22 from the feed liquor horn mouth 21 of annular mixer for liquid 2 also can carry out mixing full and uniform further, this annular mixer for liquid 2 can effectively prevent polymer solution from causing because of shear action reducing viscosity, the mixed liquor prepared by this annular mixer for liquid 2 can play good profile control effect to oil reservoir.
According to an embodiment of the invention, as shown in Figure 2, described annular mixer for liquid 2 has annular container cavity 23, and one end that described cross-linking agent solution feed liquor pipeline 3 stretches into described annular container cavity 23 is connected with shower nozzle 31, and described shower nozzle 31 is relative with described feed liquor horn mouth 21.In the present embodiment, shower nozzle 31 is spherical shower nozzle, offer in the side that described shower nozzle 31 is relative with feed liquor horn mouth 21 multiple go out fluid through-hole 311, also be, the side hemisphere face that spherical shower nozzle 31 is relative with feed liquor horn mouth 21 offers multiple go out fluid through-hole 311, the benefit of such setting is, cross-linking agent solution can from spherical shower nozzle 31 on the side hemisphere face in feed liquor horn mouth 21 direction multiple go out fluid through-hole 311 spouting, the injection of cross-linking agent solution radially, cross-linking agent solution can be made so fully to mix with polymer solution, the mixability of both raisings, in the present embodiment, this diameter going out fluid through-hole 311 is 1 ~ 2mm.
When carrying out the mixing of polymer solution and cross-linking agent solution, first, polymer solution autohemagglutination polymer solution feed liquor pipeline 4 is injected annular mixer for liquid 2, cross-linking agent solution self-crosslinking agent solution feed liquor pipeline 3 is injected annular mixer for liquid 2, because the diameter of feed liquor horn mouth 21 increases gradually along the flow direction direction of arrow indication (in the Fig. 2) of polymer solution, the flow velocity of polymer solution slows down gradually at feed liquor horn mouth 21 place, now pass through the cross-linking agent solution that cross-linking agent solution feed liquor pipeline 3 injects to shower nozzle 31 place, on shower nozzle 31 multiple go out fluid through-hole 311 radially spray, because the flow direction of polymer solution and cross-linking agent solution is contrary, polymer solution and cross-linking agent solution can mix more fully at feed liquor horn mouth 21 place of annular mixer for liquid 2, flow in annular container cavity 23 afterwards, by buffering, reduction of speed mixes further, until when arriving fluid horn mouth 22 place, polymer solution and cross-linking agent solution can have the sufficient time to carry out Homogeneous phase mixing, annular mixer for liquid 2 is flowed out finally by fluid horn mouth 22.
The present invention is mixed by annular mixer for liquid 2 pairs of polymer solutions and cross-linking agent solution, polymer solution and cross-linking agent solution are reduction of speed nonturbulent flow static mixing in annular container cavity 23, the two can carry out full and uniform mixing in annular mixer for liquid 2, effectively prevents polymer solution from falling low viscous situation because of shearing and occurs.
According to an embodiment of the invention, described polymer solution feed liquor pipeline 4 is connected with polymer solution flow meter 41 and feed liquor unidirectional stop valve 42.Polymer solution flow meter 41 is for measuring the flow of the polymer solution of autohemagglutination polymer solution feed liquor pipeline 4 injection, and feed liquor unidirectional stop valve 42 is for opening or close polymer solution feed liquor pipeline 4.
Further, the feed liquor horn mouth 21 of described annular mixer for liquid 2 is connected with described polymer solution feed liquor pipeline 4 by polymer solution unidirectional stop valve 24, and the fluid horn mouth 22 of described annular mixer for liquid 2 is connected with described mixed liquor fluid pipeline 5 by mixed liquor unidirectional stop valve 25.Polymer solution unidirectional stop valve 24 and mixed liquor unidirectional stop valve 25 are for the passage of the feed liquor horn mouth 21 and fluid horn mouth 22 place of opening or close closed-loop shaped mixer for liquid 2.
According to an embodiment of the invention, described polymer solution injects on pipeline 1 and is connected with unidirectional stop valve 13, and this unidirectional stop valve 13 injects pipeline 1 for opening or close polymer solution.Further, described mixed liquor fluid pipeline 5 is connected with fluid unidirectional stop valve 51, this fluid unidirectional stop valve 51 is for opening or close mixed liquor fluid pipeline 5.In addition, cross-linking agent solution feed liquor pipeline 3 is connected with cross-linking agent solution unidirectional stop valve 32, cross-linking agent solution flow meter 33 and high pressure resistant measuring pump 34, cross-linking agent solution unidirectional stop valve 32 is for opening or close cross-linking agent solution feed liquor pipeline 3, and cross-linking agent solution flow meter 33 is for measuring the flow of the cross-linking agent solution of self-crosslinking agent solution feed liquor pipeline 3 injection.In one embodiment, the reading being connected to the polymer solution flow meter 41 on polymer solution feed liquor pipeline 4 is 10:1 with the ratio of the reading being connected to the cross-linking agent solution flow meter 33 on cross-linking agent solution feed liquor pipeline 3, and the capacity being also namely injected into the polymer solution in annular mixer for liquid 2 is 10 times of the capacity of the cross-linking agent solution be injected in annular mixer for liquid 2.
According to an embodiment of the invention, described mixed liquor fluid pipeline 5 is connected with sampling and detects pipeline 6.Open this sampling and detect pipeline 6, sampling can be carried out to the mixed liquor flowed out in annular mixer for liquid 2 and detect, do gel test with simulated formation temperature.
Embodiment 2
The present invention also provides a kind of polymer flooding oil field online profile control method, and the online profile control method in described polymer flooding oil field comprises the steps:
A) polymer solution is provided to inject pipeline 1 and an annular mixer for liquid 2, described polymer solution injects pipeline 1 and is arranged in parallel with described annular mixer for liquid 2, the two ends of described annular mixer for liquid 2 are respectively equipped with feed liquor horn mouth 21 and fluid horn mouth 22, the arrival end 11 that described feed liquor horn mouth 21 injects pipeline 1 with described polymer solution is connected with a polymer solution feed liquor pipeline 4 respectively, the port of export 12 that described fluid horn mouth 22 injects pipeline 1 with described polymer solution is connected with a mixed liquor fluid pipeline 5 respectively, the internal ring wall of described annular mixer for liquid 2 is connected with cross-linking agent solution feed liquor pipeline 3, one end that described crosslinking agent feed liquor pipeline 3 stretches into described annular mixer for liquid 2 is relative with described feed liquor horn mouth 21,
B) to injection of polymer solution in described polymer solution feed liquor pipeline 4, in the process of injection of polymer solution, described annular mixer for liquid 2 is in closed condition, and described polymer solution injects pipeline 1 by described polymer solution and flows into mixed liquor fluid pipeline 5, then injects water injection well;
C) described annular mixer for liquid 2 is opened, close described polymer solution and inject pipeline 1, cross-linking agent solution is injected in described cross-linking agent solution feed liquor pipeline 3, described polymer solution and described cross-linking agent solution mix in described annular mixer for liquid 2, the mixed liquor generated after the two mixing flows into mixed liquor fluid pipeline 5 from the fluid horn mouth 22 of described annular mixer for liquid, then injects water injection well;
D) close described annular mixer for liquid 2, open described polymer solution and inject pipeline 1, normal polymerization thing drives production.
Specifically, the polymer solution mentioned in described step a) inject pipeline 1, annular mixer for liquid 2 and cross-linking agent solution feed liquor pipeline 3 structure, operating principle injects pipeline 1 with beneficial effect with the polymer solution of embodiment 1, annular mixer for liquid 2 is identical with cross-linking agent solution feed liquor pipeline 3, do not repeat them here.
Above-mentioned steps b) be the process of oil reservoir being carried out to polymer flooding, first, open polymer solution and inject pipeline 1, now annular mixer for liquid 2 is in closed condition, injection of polymer solution in polymer solution feed liquor pipeline 4, this polymer solution autohemagglutination polymer solution feed liquor pipeline 4 flows into polymer solution and injects in pipeline 1, and then flows out from mixed liquor fluid pipeline 5 and inject water injection well.
When needs carry out profile control process to oil reservoir, namely step c) is carried out, open annular mixer for liquid 2, close polymer solution and inject pipeline 1, now in cross-linking agent solution feed liquor pipeline 3, inject cross-linking agent solution, because polymer solution injects pipeline 1 with annular mixer for liquid 2 for being arranged in parallel, therefore, after closedown polymer solution injects pipeline 1, the polymer solution flowed in autohemagglutination polymer solution feed liquor pipeline 4 can flow in annular mixer for liquid 2, mix with the cross-linking agent solution be injected in annular mixer for liquid 2 in self-crosslinking agent solution feed liquor pipeline 3, polymer solution mixes with feed liquor horn mouth 21 place of cross-linking agent solution at annular mixer for liquid 2, then through annular mixer for liquid 2 to carry out further Homogeneous phase mixing, finally flow into mixed liquor fluid pipeline 5 from the fluid horn mouth 22 of annular mixer for liquid 2 and then inject water injection well, complete the profile control process to down-hole oil reservoir.
In step d), after completing the profile control process to oil reservoir, open polymer solution and inject pipeline 1, close closed-loop shaped mixer for liquid 2, proceed the normal production of polymer flooding.
The online profile control method in polymer flooding oil field of the present invention, being arranged in parallel of pipeline 1 and annular mixer for liquid 2 is injected by polymer solution, the online profile control process of polymer solution can be realized, also be, can Configuration Online need to carry out the polymer solution of profile control process and the mixed liquor of cross-linking agent solution to oil reservoir without the need to stopping polymer waterflooding, its technique is simple, easy to operate.In addition, the one end stretched in annular mixer for liquid 2 because of cross-linking agent solution feed liquor pipeline 3 is relative with feed liquor horn mouth 21, also be, the flow direction of the polymer solution injected from the feed liquor horn mouth 21 of annular mixer for liquid 2 is injected into the cross-linking agent solution in annular mixer for liquid 2 just flow direction with self-crosslinking agent solution feed liquor pipeline 3 is contrary, therefore, polymer solution and cross-linking agent solution can mix at feed liquor horn mouth 21 place of annular mixer for liquid 2, the two flow in the process of fluid horn mouth 22 from the feed liquor horn mouth 21 of annular mixer for liquid 2 also can carry out mixing full and uniform further, this annular mixer for liquid 2 can effectively prevent polymer solution from causing because of shear action reducing viscosity, the mixed liquor prepared by this annular mixer for liquid 2 can play good profile control effect to oil reservoir.
According to an embodiment of the invention, also step c1 is comprised between described step c) and described step d)): close described annular mixer for liquid 2, carrying out closing well to described water injection well waits solidifying, specifically, closing well is needed to wait solidifying 5 days to described water injection well, like this closing well wait solidifying after, polymer solution and the mixed mixed liquor of cross-linking agent solution can be made fully to act in the oil reservoir of down-hole, the subsequent polymer for oil reservoir drive process carry out smoothly provide premise.
According to an embodiment of the invention, described mixed liquor fluid pipeline 5 is connected with sampling and detects pipeline 6, in described step c), open described sampling and detect pipeline 6, sampling detection is carried out to the described mixed liquor that the fluid horn mouth 22 from described annular mixer for liquid 2 is prepared, does gel test with simulated formation temperature.
In one embodiment, the reading being connected to the flow meter 33 on cross-linking agent solution feed liquor pipeline 3 is 10:1 with the ratio of the reading being connected to the flow meter 41 on polymer solution feed liquor pipeline 4, also the capacity being namely injected into the polymer solution in annular mixer for liquid 2 is 10 times of the capacity of the cross-linking agent solution be injected in annular mixer for liquid 2, and the mixed liquor obtained after the polymer solution that such proportioning goes out and cross-linking agent solution mix is good to the profile control effect of oil reservoir.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (18)
1. the online profile control device in polymer flooding oil field, is characterized in that, the online profile control device in described polymer flooding oil field comprises:
Polymer solution injects pipeline, and it has arrival end and the port of export;
Annular mixer for liquid, itself and described polymer solution ascending pipe line parallel are arranged, the two ends of described annular mixer for liquid are respectively equipped with feed liquor horn mouth and fluid horn mouth, described feed liquor horn mouth and described arrival end are connected with a polymer solution feed liquor pipeline respectively, and described fluid horn mouth and the described port of export are connected with a mixed liquor fluid pipeline respectively;
Cross-linking agent solution feed liquor pipeline, it is connected on the internal ring wall of described annular mixer for liquid, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular mixer for liquid is relative with described feed liquor horn mouth.
2. the online profile control device in polymer flooding oil field as claimed in claim 1, it is characterized in that, described annular mixer for liquid has annular container cavity, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular container cavity is connected with shower nozzle, and described shower nozzle is relative with described feed liquor horn mouth.
3. the online profile control device in polymer flooding oil field as claimed in claim 2, it is characterized in that, described shower nozzle is spherical shower nozzle, offer in the side that described shower nozzle is relative with described feed liquor horn mouth multiple go out fluid through-hole.
4. the online profile control device in polymer flooding oil field as claimed in claim 3, is characterized in that, described in go out fluid through-hole diameter be 1 ~ 2mm.
5. the online profile control device in polymer flooding oil field as claimed in claim 1, is characterized in that, described polymer solution feed liquor pipeline is connected with polymer solution flow meter and feed liquor unidirectional stop valve.
6. the online profile control device in polymer flooding oil field as claimed in claim 1, it is characterized in that, the feed liquor horn mouth of described annular mixer for liquid is connected with described polymer solution feed liquor pipeline by polymer solution unidirectional stop valve, and the fluid horn mouth of described annular mixer for liquid is connected with described mixed liquor fluid pipeline by mixed liquor unidirectional stop valve.
7. the online profile control device in polymer flooding oil field as claimed in claim 1, is characterized in that, described polymer solution injects on pipeline and is connected with unidirectional stop valve.
8. the online profile control device in polymer flooding oil field as claimed in claim 1, is characterized in that, described mixed liquor fluid pipeline is connected with fluid unidirectional stop valve.
9. the online profile control device in polymer flooding oil field as claimed in claim 1, is characterized in that, described cross-linking agent solution feed liquor pipeline is connected with cross-linking agent solution unidirectional stop valve, cross-linking agent solution flow meter and high pressure resistant measuring pump.
10. the online profile control device in polymer flooding oil field as claimed in claim 1, is characterized in that, described mixed liquor fluid pipeline is connected with sampling and detects pipeline.
11. 1 kinds of online profile control methods in polymer flooding oil field, is characterized in that, the online profile control method in described polymer flooding oil field comprises the steps:
A) polymer solution is provided to inject pipeline and an annular mixer for liquid, described polymer solution injects pipeline and described annular mixer for liquid is arranged in parallel, the two ends of described annular mixer for liquid are respectively equipped with feed liquor horn mouth and fluid horn mouth, the arrival end that described feed liquor horn mouth injects pipeline with described polymer solution is connected with a polymer solution feed liquor pipeline respectively, the port of export that described fluid horn mouth injects pipeline with described polymer solution is connected with a mixed liquor fluid pipeline respectively, the internal ring wall of described annular mixer for liquid is connected with cross-linking agent solution feed liquor pipeline, one end that described crosslinking agent feed liquor pipeline stretches into described annular mixer for liquid is relative with described feed liquor horn mouth,
B) to injection of polymer solution in described polymer solution feed liquor pipeline, in the process of injection of polymer solution, described annular mixer for liquid is in closed condition, and described polymer solution enters mixed liquor fluid pipeline by described polymer solution ascending pipe linear flow, then injects water injection well;
C) described annular mixer for liquid is opened, close described polymer solution and inject pipeline, cross-linking agent solution is injected in described cross-linking agent solution feed liquor pipeline, described polymer solution and described cross-linking agent solution mix in described annular mixer for liquid, and the mixed liquor generated after the two mixing injects water injection well from described mixed liquor fluid pipeline;
D) close described annular mixer for liquid, open described polymer solution and inject pipeline, normal polymerization thing drives production.
The 12. online profile control methods in polymer flooding oil field as claimed in claim 11, is characterized in that, between described step c) and described step d), also comprise step c1): close described annular mixer for liquid, closing well is carried out to described water injection well and waits solidifying.
The 13. online profile control methods in polymer flooding oil field as claimed in claim 12, is characterized in that, wait solidifying 5 days to described water injection well closing well.
The 14. online profile control methods in polymer flooding oil field as claimed in claim 11, it is characterized in that, described mixed liquor fluid pipeline is connected with sampling and detects pipeline, in described step c), open described sampling and detect pipeline, sampling detection is carried out to the described mixed liquor that the fluid horn mouth from described annular mixer for liquid flows out.
The 15. online profile control methods in polymer flooding oil field as claimed in claim 11, it is characterized in that, described annular mixer for liquid has annular container cavity, and one end that described cross-linking agent solution feed liquor pipeline stretches into described annular container cavity is connected with shower nozzle, and described shower nozzle is relative with described feed liquor horn mouth.
The 16. online profile control methods in polymer flooding oil field as claimed in claim 15, it is characterized in that, described shower nozzle is spherical shower nozzle, offer in the side that described shower nozzle is relative with described feed liquor horn mouth multiple go out fluid through-hole.
The 17. online profile control methods in polymer flooding oil field as claimed in claim 16, is characterized in that, described in go out fluid through-hole diameter be 1 ~ 2mm.
The 18. online profile control methods in polymer flooding oil field as claimed in claim 11, it is characterized in that, described polymer solution feed liquor pipeline is connected with polymer solution flow meter, described cross-linking agent solution feed liquor pipeline is connected with cross-linking agent solution flow meter, and the ratio of the reading of described polymer solution flow meter and the reading of described cross-linking agent solution flow meter is 10:1.
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