CN102003176A - Quantitative test method for residual polymer in polymer flooding reservoir rocks - Google Patents
Quantitative test method for residual polymer in polymer flooding reservoir rocks Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012113 quantitative test Methods 0.000 title abstract description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 72
- 229910052757 nitrogen Inorganic materials 0.000 claims description 36
- 150000005846 sugar alcohols Polymers 0.000 claims description 24
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 20
- 238000004458 analytical method Methods 0.000 claims description 16
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- 229910052734 helium Inorganic materials 0.000 claims description 16
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
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- 239000001569 carbon dioxide Substances 0.000 claims description 10
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000012159 carrier gas Substances 0.000 claims description 8
- 238000011161 development Methods 0.000 claims description 8
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Abstract
The invention discloses a quantitative test method for residual polymer in polymer flooding reservoir rocks, and relates to a method for testing residual polymer. The method solves the problem that the conventional method for detecting the polymer residue cannot directly measure the polymer residue of different well depth rocks of a polymer flooding reservoir. The method comprises the following steps of: 1, testing a nitrogenous background value; 2, measuring a nitrogenous value data of a rock sample of the polymer flooding reservoir; 3, subtracting the nitrogenous background value from the nitrogenous value data of the rock sample of the polymer flooding reservoir to obtain a nitrogenous value of the polymer; and 4, putting the nitrogenous value of the polymer into a formula y=0.0003x+0.0142 to obtain the residue of the polymer in the polymer flooding reservoir rocks. By researching the measurement result and the distribution characteristic of the polymer residue of the polymer flooding reservoir rocks measured by the method, new basis is provided for improving third oil recovery exploitation, improving crude oil recovery rate and researching polymer flooding by using the residual polymer.
Description
Technical field
The present invention relates to a kind of method of testing residual polyalcohol.
Background technology
The Daqing oil field polymer flooding is since 1996 drop into industrial applications, obtain tangible decreasing water cut and increasing oil effect and significant technical economic benefit at several thousand mouthfuls of wells of tens blocks, realized that the layered quantitative injection of polymer improves oil recovery factor, polymer flooding year, produce oil accounted for 25% of Daqing oil field annual production, became the important technical that the oil field remedies production decline.Along with the Daqing oil field oil extraction moisture increase needs with stable high yield and establishment " century-old oil field ", polymer flooding block and oil production will increase year by year, its effect is increasing.Yet, reach the different times after finishing in the injection of polymer process, residual number of polymers in the stratum, comprise that reservoir rock is detained and is dissolved in polymer in the formation fluid, exploitation has material impact to these residual polyalcohols to remaining oil, reservoir rock is detained polymer reduction polymer solution concentration, stops up duct increase fluid flow resistance on the one hand, utilizes these residual polyalcohols to come macropore plugging and deep transfer drive to improve oil recovery factor on the other hand.Therefore, residual polyalcohol quantitative test and distribution characteristics research in the reservoir rock, significant to the development effectiveness and the recovery ratio of further raising tertiary oil recovery.
The polymer residue amount is generally calculated according to the mass concentration of polymer in injection of polymer dry powder amount and the produced liquid in oil well and is obtained in the stratum, perhaps adopts analogue experiment method to obtain rock core and is detained the polymer experimental data.But said method all can not directly record the different well depth rock of polymer flooding reservoir polymer residue amount.
Summary of the invention
The objective of the invention is directly to record the problem of the different well depth rock of polymer flooding reservoir polymer residue amount, residual polyalcohol quantitative measuring method in a kind of polymer flooding reservoir rock is provided for the existing method that detects the polymer residue amount.
The residual polyalcohol quantitative measuring method is as follows in the polymer flooding reservoir rock of the present invention: one, the non-polymer of gathering one group of oil field development core hole drives the reservoir rock sample, grind evenly with agate mortar then, take by weighing the 5mg non-polymer and drive the oxidation tube that the reservoir rock sample is put into combustion furnace, at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, get the average that the records data nitrogenous background value as polymer flooding reservoir rock sample then, wherein driving the reservoir rock sample from non-polymer, to put into combustion furnace to the time that draws data be 10 minutes; Two, gather the rock sample of the polymer flooding reservoir of oil field development core hole, grind evenly with agate mortar, the rock sample that takes by weighing 5mg polymer flooding reservoir is put into the oxidation tube of combustion furnace at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, obtain the nitrogenous Value Data of the rock sample of polymer flooding reservoir, wherein putting into combustion furnace to the time that draws data from polymer flooding reservoir rock sample is 10 minutes; Three, the nitrogenous Value Data of the polymer flooding reservoir rock sample that obtains with step 2 deducts the nitrogenous background value of polymer flooding reservoir rock sample, obtains the nitrogenous value of polymer; Four, with the nitrogenous value substitution formula y=0.0003x+0.0142 of polymer, y is the residual quantity of polymer in the polymer flooding reservoir rock among the formula y=0.0003x+0.0142, x is the nitrogenous value of polymer, promptly gets the residual quantity of polymer in the polymer flooding reservoir rock.
Elemental analyser described in above-mentioned steps one and the step 2 is the German elementar elemental analyser Vario EL cube of company.
The present invention has mainly proposed the assay method of polymer residue amount in the polymer flooding reservoir rock, its main foundation is to contain polymer (polyacrylamide) and molecule (amide groups, carboxyl etc.) thereof etc. in the polymer flooding reservoir rock, under the condition of high-temp combustion with rock sample in nitrogen (comprising polymer and former wet goods) be converted into nitrogen oxide, nitrogen oxide is reduced to nitrogen again, carbon dioxide, water and the nitrogen that sample produces by chromatographic column separates, the thermal conductivity detector (TCD) detection; Utilize the polymer standard specimen to set up the calibration curve of polymer quality and nitrogen content, by deduction reservoir rock nitrogen background value (in the reservoir rock in the non-polymer nitrogen) and outer target method, the quantitative test of polymer residue amount in the realization rock.
Adopting this method to record grand celebration Sa Ertu oilfield polymer flooding reservoir rock residual polyalcohol distributes in the vertical and transversely and all presents non-homogeneity, the different notes adopted position reservoir rock polymer residue amount difference, presents main stream line and puts the feature of polymer residue amount＞main stream line centre position polymer residue amount＞main stream line near producing well position polymer residue amount＞shunt line centre position polymer residue amount near injecting well location.
The result who draws by the bright method of testing of this law polymer flooding reservoir rock polymer residue amount as can be known is subjected to lithology and granularity, differently annotates the control of adopting the position and annotating poly-time and these factors of reservoir properties.
To adopting method of the present invention to record polymer flooding reservoir rock polymer residue quantitative determination result and distribution characteristics research, provide new foundation for using residual polyalcohol raising tertiary oil recovery exploitation, raising oil recovery factor and polymer displacement of reservoir oil research, had a extensive future.
Description of drawings
Fig. 1 is north, Sa Ertu oil field two western polymer flooding injection-production well and manhole drawing of site in the specific embodiment three, and ⊙ represents to inject well among the figure, ● the expression producing well,
The expression manhole, the northern 2-351-inspection of 1 expression P60, the northern 2-352-inspection of northern 2-350-inspection 45,3 expressions of 2 expressions P59, the northern 2-352-inspection of 4 expressions P60, the northern 2-351-inspection of 5 expressions P61, the northern 2-4-P46 of 6 expressions, the northern 2-D5-P36 of 7 expressions, the northern 2-D5-P37 of 8 expressions, the northern 2-D5-P38 of 9 expressions, the northern 2-5-P52 of 10 expressions; Fig. 2 is a polymer quantitative test canonical plotting in the specific embodiment three.
The specific embodiment
Technical solution of the present invention is not limited to the following cited specific embodiment, also comprises any combination between each specific embodiment.
The specific embodiment one: in the present embodiment in the polymer flooding reservoir rock residual polyalcohol quantitative measuring method as follows: one, the non-polymer of gathering one group of oil field development core hole drives the reservoir rock sample, grind evenly with agate mortar then, take by weighing the 5mg non-polymer and drive the oxidation tube that the reservoir rock sample is put into combustion furnace, at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, get the average that the records data nitrogenous background value as polymer flooding reservoir rock sample then, wherein driving the reservoir rock sample from non-polymer, to put into combustion furnace to the time that draws data be 10 minutes; Two, gather the rock sample of the polymer flooding reservoir of oil field development core hole, grind evenly with agate mortar, the rock sample that takes by weighing 5mg polymer flooding reservoir is put into the oxidation tube of combustion furnace at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, obtain the nitrogenous Value Data of the rock sample of polymer flooding reservoir, wherein putting into combustion furnace to the time that draws data from polymer flooding reservoir rock sample is 10 minutes; Three, the nitrogenous Value Data of the polymer flooding reservoir rock sample that obtains with step 2 deducts the nitrogenous background value of polymer flooding reservoir rock sample, obtains the nitrogenous value of polymer; Four, with the nitrogenous value substitution formula y=0.0003x+0.0142 of polymer, y is the residual quantity of polymer in the polymer flooding reservoir rock among the formula y=0.0003x+0.0142, x is the nitrogenous value of polymer, promptly gets the residual quantity of polymer in the polymer flooding reservoir rock.
Gather the used polymer of oilfield polymer flooding exploitation, grind evenly with agate mortar then, again polymer samples is put into combustion furnace, at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, record nitrogenous Value Data in one group of polymer, thereby obtain the relational expression (adopting Microsoft office Excel 2003 softwares) of polymer quality and nitrogenous value calibration curve, i.e. formula y=0.0003x+0.0142 in the present embodiment step 4.
Because contain crude oil in the polymer flooding reservoir rock sample, may contain polymer (polyacrylamide) and molecule (amide groups, carboxyl etc.) thereof etc., polyacrylamide amine monomers (CH
2CHCONH
2) in contain amide groups (CONH
2); Under the condition of high-temp combustion with rock sample in nitrogen (polymer and former wet goods) be converted into nitrogen oxide, nitrogen oxide is reduced to nitrogen again, carbon dioxide, water and the nitrogen that sample produces by chromatographic column separates, the thermal conductivity detector (TCD) detection; Present embodiment utilizes the polymer standard specimen to set up the calibration curve of polymer quality and nitrogen content, by the method for external standard method and deduction reservoir rock nitrogen background value (in the reservoir rock in the non-polymer nitrogen), realizes the quantitative test of residual polyalcohol amount in the rock.
The method of testing of residual polyalcohol amount in the polymer flooding reservoir rock of present embodiment, (utilize agent (YG107 is the Organic Chromium crosslinking agent) again for using residual polyalcohol raising tertiary oil recovery development effectiveness as injecting, its viscosity and water are near, can preferentially enter high permeability zone, produce the frozen glue of varying strength with polymer solution generation cross-linking reaction residual in the high permeability zone, combine with the multi-form polymer molecule that exists the stratum is residual, reach certain deep profile controlling effect, force follow-up injection water to enter less permeable layer, sweep efficiency increases, thereby the recovery ratio behind the raising polymer flooding), improving the research of oil recovery factor and polymer displacement of reservoir oil provides new foundation, has a extensive future.
The specific embodiment two: what present embodiment and the specific embodiment one were different is that the elemental analyser described in step 1 and the step 2 is the German elementar elemental analyser Vario EL cube of company.Other is identical with the specific embodiment one.
The specific embodiment three: present embodiment is that example adopts the method for testing test polymer of the specific embodiment one to drive residual polyalcohol in the reservoir rock with grand celebration Sa Ertu oil field.
North, grand celebration Sa Ertu oil field two Westbound pieces dropped into exploitation in 1964, basic well pattern was Sa Ertu, grape flower 2 cover oil reservoirs, adopts the exploitation of line drive water injection well pattern, once encrypted adjustment in 1981, carried out the superencipher adjustment in 1994, carried out that the I of Portugal group major oil reservoir is poly-to drive exploitation in 1994; 2008 03 month, Sa north two western east producing wells drove a well 91 mouthfuls, average individual well day produce oil 5.31t, comprehensive water cut 95.03%, the 1500 sub-very much weight polymers that adopt Daqing Refinery to produce.
The 1500 sub-very much weight polymers that present embodiment is produced Daqing Refinery (polymer that study area adopts) grind evenly with agate mortar, at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, record nitrogenous Value Data in one group of polymer (polymer quantitative test calibration curve experimental data) as table 1.
Table 1
Utilize experimental data (table 1) thereby the relational expression (Fig. 2) of acquisition polymer quality and nitrogenous value calibration curve, i.e. formula y=0.0003x+0.0142.
Drive quantitative test and research residual polyalcohol distribution characteristics in the reservoir rock in conjunction with Fig. 1 present embodiment for gathering, select north, Sa Ertu oil field two northwest 2-351-inspection P60, north 2-351-inspection P61, north 2-352-inspection P59, north 2-352-inspection P60 well (2008) and northern 2-350-examine 45 coring inspection chamber (2002), gather grape flower and (use PI, PII represents) 99 in reservoir rock sample, adopt the specific embodiment one method of testing test polymer to drive residual polyalcohol in the reservoir rock, test result such as table 2 (main stream line diverse location polymer residue quantitative determination result) and table 3 (main stream line and shunt line different time polymer residue quantitative determination result) then:
Table 2
Table 3
Draw to draw a conclusion by table 2 and table 3:
One, polymer flooding reservoir rock polymer residue quantitative determination result and distribution characteristics:
1, polymer flooding reservoir rock residual polyalcohol is vertically gone up distribution characteristics:
Main stream line is put northern 2-352-inspection P59 well polymer residue amount distribution 66.49～812.44 μ g/g near injecting well location, and maximum value and minimum value differ 11.22 times; North, main stream line centre position 2-351-inspection P60 well polymer residue amount distribution 76.94～506.63 μ g/g, maximum value and minimum value differ 5.58 times; Main stream line is near north, producing well position 2-352-inspection P60 well polymer residue amount distribution 24.27～473.12 μ g/g, and maximum value and minimum value differ 18.49 times; North, shunt line centre position 2-351-inspection P61 well polymer residue amount distribution 33.92～292.63 μ g/g, maximum value and minimum value differ 7.62 times; North, main stream line centre position 2-350-examines 45 well polymer residue amount distributions, 3.29～265.36 μ g/g, and maximum value and minimum value differ 79.66 times.As seen, each mouthful well residual polyalcohol distributes in the vertical and all presents tangible non-homogeneity, and this is because non-homogeneity such as lithology, reservoir properties cause.
2, polymer flooding reservoir rock residual polyalcohol distribution characteristics transversely:
On the same main stream line, put northern 2-352-inspection P59 well PI near injecting well location
1-2Layer, PI
3Layer packsand polymer residue amount on average is respectively 145.06 μ g/g, 204.83 μ g/g, near north, producing well position 2-352-inspection P60 well PI
1-2Layer, PI
3Layer packsand polymer residue amount on average is respectively 239.59 μ g/g, 176.60 μ g/g; On the different main stream lines, middle northern 2-351-inspection P60 well PI
5-7Layer packsand polymer residue amount 402.68 μ g/g put northern 2-352-inspection P59 well PI near injecting well location
5-7Layer packsand polymer residue amount on average is respectively 505.38 μ g/g; Same centre position, main stream line north 2-351-inspection P60 well and shunt line north 2-351-inspection P61 well PI
5-7Layer packsand polymer residue amount on average is respectively 402.68 μ g/g, 250.10 μ g/g; Well location is put northern 2-351-inspection P60 well in the middle of northern 2-352-inspection P59 well, the main stream line to main stream line, main stream line on average is respectively 245.06 μ g/g, 242.92 μ g/g, 190.69 μ g/g, 176.26 μ g/g near north, producing well position 2-352-inspection P60 well, north, shunt line centre position 2-351-inspection P61 well packsand polymer residue amount near injecting.As seen, in the horizontal, no matter be on the same main stream line, on the different main stream line, still same lithology rock residual polyalcohol distribution all presents non-homogeneity on main stream line and shunt line, and this is because non-homogeneity such as lithology, reservoir properties cause.
Two, the control of polymer flooding reservoir rock residual polyalcohol and influence factor:
1, the relation of polymer flooding reservoir rock polymer residue amount and lithology and granularity:
The brown oil-containing siltstone polymer residue amount that main stream line is put northern 2-352-inspection P59 well well depth 1007.09m near the injection well location is 509.85 μ g/g, and the polymer residue amount is at PI
1-2Layer content is the highest; The brown oil-containing siltstone of well depth 1032.87m polymer residue amount is 812.44 μ g/g, and the polymer residue amount is at PI
5-7Layer content is the highest, as seen, lithology is that siltstone or the polymer residue amount that contains the mud siltstone are apparently higher than packsand, polymer flooding rock polymer residue amount is controlled by lithology and sandstone grain, it is many more or sandstone grain is more little (polymer and molecular energy thereof by), the rock absorption affinity is big more that the reservoir rock contains the shale composition, causes the adsorpting polymerization thing amount can be big more.
2, polymer flooding reservoir rock polymer residue amount and injection of polymer time relation
North, main stream line centre position 2-350-examines 45 wells and northern 2-351-inspection P60 well is a dense well spacing contrast well, the injection of polymer time was respectively 8 years and 14 years, the polymer residue amount on average is respectively 87.43 μ g/g, 242.92 μ g/g, as seen, reservoir rock polymer residue amount increases with the growth of injection of polymer time, and visible reservoir rock polymer residue amount is an accumulation.
Three, polymer flooding reservoir rock polymer residue amount and notes are adopted the relation of position:
Main stream line is put near injecting well location, the centre position, near the producing well position, the identical packsand polymer residue of shunt line position oil well amount on average is respectively 256.17 μ g/g, 242.92 μ g/g, 190.69 μ g/g, 176.26 μ g/g is (referring to table 2, table 3), as seen, the polymer residue amount presents main stream line and puts the feature of polymer residue amount＞main stream line centre position polymer residue amount＞main stream line near producing well position polymer residue amount＞shunt line centre position polymer residue amount near injecting well location, the different notes, adopt well location and put reservoir rock polymer residue amount difference.This is owing to be due to the trend that reduces to producing well locality injection of polymer solution concentration from injecting well along main stream line, to put the injection of polymer solution concentration the highest relatively near injecting well location, along with polymer solution drives the suction-operated to polymer of crude oil and rock and fluid in the producing well moving process in reservoir, polymer solution concentration is the trend that reduces, and makes the polymer residue amount also be the trend that reduces; Shunt line injection of polymer amount is lower than main stream line, makes shunt line centre position polymer residue amount minimum.
Present embodiment is the polymer residue amount of replication north 2-351-inspection P60 well well depth 1022.82m sample repeatedly under the same conditions, result such as table 4, and the maximum absolute deviation of measurement result is 0.93%, standard deviation is 0.52.
Table 4
Claims (2)
1. residual polyalcohol quantitative measuring method in the polymer flooding reservoir rock, it is characterized in that the residual polyalcohol quantitative measuring method is as follows in the polymer flooding reservoir rock: one, the non-polymer of gathering one group of oil field development core hole drives the reservoir rock sample, grind evenly with agate mortar then, take by weighing the 5mg non-polymer and drive the oxidation tube that the reservoir rock sample is put into combustion furnace, at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, get the average that the records data nitrogenous background value as polymer flooding reservoir rock sample then, wherein driving the reservoir rock sample from non-polymer, to put into combustion furnace to the time that draws data be 10 minutes; Two, gather the rock sample of the polymer flooding reservoir of oil field development core hole, grind evenly with agate mortar, the rock sample that takes by weighing 5mg polymer flooding reservoir is put into the oxidation tube of combustion furnace at 950 ℃, oxygen purity is 99.99%, advanced under the condition that oxygen flow is 10ml/min heating flame 3 seconds, be helium in carrier gas then, helium purity is to purge the product of burning in the reduction tube that is carried to reduction furnace under 99.99% the condition and 500 ℃ of reduction 10 seconds, be 6mm at nitrogen analysis post external diameter again, the nitrogen analysis column length is 200mm, fixing is polystyrene mutually, measure flow and be separating nitrogen under the condition of 200ml/min, carbon dioxide, water, detect by the thermal conductivity detector (TCD) in the elemental analyser, obtain the nitrogenous Value Data of the rock sample of polymer flooding reservoir, wherein putting into combustion furnace to the time that draws data from polymer flooding reservoir rock sample is 10 minutes; Three, the nitrogenous Value Data of the polymer flooding reservoir rock sample that obtains with step 2 deducts the nitrogenous background value of polymer flooding reservoir rock sample, obtains the nitrogenous value of polymer; Four, with the nitrogenous value substitution formula y=0.0003x+0.0142 of polymer, y is the residual quantity of polymer in the polymer flooding reservoir rock among the formula y=0.0003x+0.0142, x is the nitrogenous value of polymer, promptly gets the residual quantity of polymer in the polymer flooding reservoir rock.
2. according to residual polyalcohol quantitative measuring method in the described polymer flooding reservoir rock of claim 1, it is characterized in that the elemental analyser described in step 1 and the step 2 is the German elementar elemental analyser Vario EL cube of company.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105113671A CN102003176A (en) | 2010-10-19 | 2010-10-19 | Quantitative test method for residual polymer in polymer flooding reservoir rocks |
| CN 201110302253 CN102507646B (en) | 2010-10-19 | 2011-10-09 | Quantitative testing method of residual polymer in polymer flooding reservoir rocks |
Applications Claiming Priority (1)
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| CN104564049A (en) * | 2015-01-22 | 2015-04-29 | 中国石油大学(华东) | Detection method of polymer flooding and gathering channel |
| CN104747149A (en) * | 2015-01-22 | 2015-07-01 | 中国石油大学(华东) | Detecting method of binary combined flooding agent migration channel |
| CN105431750A (en) * | 2013-06-27 | 2016-03-23 | 地球物理集团公司 | Fracability measurement method and system |
| CN105548232A (en) * | 2015-12-07 | 2016-05-04 | 中国石油大学(北京) | Microscopic detection method for distribution state of oil displacement polymer in porous medium |
| CN109312218A (en) * | 2016-05-31 | 2019-02-05 | 多化学集团有限责任公司 | Determination of residual friction reducer concentrations in subsurface treatment fluids |
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| CN105431750A (en) * | 2013-06-27 | 2016-03-23 | 地球物理集团公司 | Fracability measurement method and system |
| CN104564049A (en) * | 2015-01-22 | 2015-04-29 | 中国石油大学(华东) | Detection method of polymer flooding and gathering channel |
| CN104747149A (en) * | 2015-01-22 | 2015-07-01 | 中国石油大学(华东) | Detecting method of binary combined flooding agent migration channel |
| CN104564049B (en) * | 2015-01-22 | 2016-04-06 | 中国石油大学(华东) | Polymer flooding gathers the detection method of altering passage |
| CN105548232A (en) * | 2015-12-07 | 2016-05-04 | 中国石油大学(北京) | Microscopic detection method for distribution state of oil displacement polymer in porous medium |
| CN105548232B (en) * | 2015-12-07 | 2017-08-01 | 中国石油大学(北京) | The microcosmic detection method of Polymer Used For Oil Displacement distribution in porous media |
| CN109312218A (en) * | 2016-05-31 | 2019-02-05 | 多化学集团有限责任公司 | Determination of residual friction reducer concentrations in subsurface treatment fluids |
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