CN201902206U - Leakage stopping simulation evaluation device for well drilling in stress-sensitive formation - Google Patents
Leakage stopping simulation evaluation device for well drilling in stress-sensitive formation Download PDFInfo
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- CN201902206U CN201902206U CN2010206260230U CN201020626023U CN201902206U CN 201902206 U CN201902206 U CN 201902206U CN 2010206260230 U CN2010206260230 U CN 2010206260230U CN 201020626023 U CN201020626023 U CN 201020626023U CN 201902206 U CN201902206 U CN 201902206U
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Abstract
本实用新型为一种应力敏感性地层钻井堵漏模拟评价装置，该装置包括一模拟井筒，模拟井筒侧壁上固定设有多个与模拟井筒连通的模拟漏层装置，模拟漏层装置由试样容器和设置在试样容器中的真实岩心试样构成，试样容器一端导通于模拟井筒侧壁的透孔，试样容器另一端设有一通孔，真实岩心试样两端分别对应透孔和通孔设置，真实岩心试样的周面与试样容器内壁之间构成密封的围压腔，该围压腔通过管路与液压稳压源连通；模拟井筒一端为堵漏浆进口，另一端为堵漏浆出口，该堵漏浆进口与一泥浆泵连通，该堵漏浆出口由管路连通于所述泥浆泵，形成堵漏浆的循环流动。该装置对应力敏感性地层堵漏工艺的研究及不同堵漏材料的封堵效果的评价提供了理论依据。
The utility model relates to a simulated evaluation device for drilling plugging in stress-sensitive formations. The device includes a simulated wellbore, and a plurality of simulated leaky layer devices connected with the simulated wellbore are fixed on the side wall of the simulated wellbore. The simulated leaky layer device consists of a test The sample container is composed of a real core sample set in the sample container. One end of the sample container is connected to the through hole on the side wall of the simulated wellbore, and the other end of the sample container is provided with a through hole. Holes and through holes are set, and a sealed confining pressure chamber is formed between the surrounding surface of the real core sample and the inner wall of the sample container, and the confining pressure chamber is connected with the hydraulic pressure stabilization source through pipelines; The other end is a plugging slurry outlet, the plugging slurry inlet is connected with a mud pump, and the plugging slurry outlet is connected with the mud pump through a pipeline to form a circulation flow of the plugging slurry. The device provides a theoretical basis for the study of plugging technology in stress-sensitive formations and the evaluation of plugging effects of different plugging materials.
Description
Technical Field
The utility model relates to a well drilling leaking stoppage simulation evaluation experimental system especially relates to a stress sensitivity stratum well drilling leaking stoppage simulation evaluation device.
Background
In large and medium oil and gas fields with a plurality of pre-mountain construction zones in western regions of China, due to the fact that cracks and pores are extremely developed and the existence of high and steep structures, the large and medium oil and gas fields are represented by typical stress sensitivity stratum drilling characteristics, well leakage frequently occurs in the actual drilling process, accidents such as drilling sticking and overflow and other complex conditions are caused after leakage, pressure balance is extremely difficult to adjust, and development of the oil fields is severely restricted.
The currently applied drilling well plugging evaluation device mainly adopts rigid cutting sealing plates with different widths and steel balls with different sizes to simulate a crack type and a pore type leaking stratum, adds plugging liquid on the upper part of the leaking stratum, and then presses the plugging liquid into the leaking stratum by using air pressure driving equipment so as to evaluate the performance of the plugging material. However, the existing drilling plugging evaluation device has the following defects:
(1) the existing leakage stoppage evaluation device can not realize the circulation of leakage stoppage slurry (liquid), so that the leakage stoppage material is deposited at the bottom of the simulated shaft, and the leakage stoppage evaluation effect is reduced.
(2) The existing leakage stoppage evaluation device can only simulate cracks with uniform width, and the difference between the cracks and the cracks with real shapes is large; even some experimental devices adopt artificial cores to simulate leaking layers, the parameter characteristics of real cores cannot be completely met.
(3) The existing plugging device does not research the influence of stress sensitivity on the plugging effect by loading confining pressure on a rock core, and because actual leaking strata in western regions are deep strata of thousands of meters, the evaluation result of the plugging material is greatly different from the actual plugging situation on site.
(4) At present, all leakage stoppage evaluation devices adopt a single leakage passage to perform experimental research, and an actual leakage stratum consists of a plurality of leakage passages, so that the existing structure cannot be used for simultaneously performing leakage stoppage research and evaluation on the plurality of leakage passages.
In view of the above, the present invention provides a simulation evaluation apparatus for leak stoppage in drilling of a stress-sensitive formation, so as to overcome the defects of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stress sensitivity stratum drilling leaking stoppage simulation evaluation device, this leaking stoppage simulation evaluation device utilizes real rock core sample to evaluate the simulation experiment to the lost circulation material of fissionability and porosity stratum leaking stoppage in-process, under the condition to real rock core sample loading confined pressure, make the leaking stoppage thick liquid carry out effective shutoff to the simulation leaking layer at the in-process of simulation pit shaft inner loop, the stress state and the actual leaking stoppage process in the pit of true simulation leaking layer department rock, provide the theoretical foundation in order to the research of stress sensitivity stratum leaking stoppage technology and the evaluation of different lost circulation material's shutoff effect.
The utility model aims at realizing the above, a stress sensitivity stratum drilling leaking stoppage simulation evaluation device, the leaking stoppage simulation evaluation device comprises a simulation shaft, a plurality of simulation leaking layer devices communicated with the simulation shaft are fixedly arranged on the side wall of the simulation shaft, the simulation leaking layer devices comprise a sample container and a real rock core sample arranged in the sample container, one end of the sample container is communicated with a through hole on the side wall of the simulation shaft, the other end of the sample container is provided with a through hole, two ends of the real rock core sample respectively correspond to the through hole and the through hole, a sealed confining pressure cavity is formed between the peripheral surface of the real rock core sample and the inner wall of the sample container, and the confining pressure cavity is communicated with a hydraulic pressure stabilizing source through a pipeline; one end of the simulation shaft is a leaking stoppage slurry inlet, the other end of the simulation shaft is a leaking stoppage slurry outlet, the leaking stoppage slurry inlet is communicated with a slurry pump, the leaking stoppage slurry outlet is provided with an overflow valve, and the overflow valve is communicated with the slurry pump through a pipeline to form the circulating flow of the leaking stoppage slurry.
In a preferred embodiment of the present invention, the real core sample has a cylindrical structure; the sample container comprises a confining pressure cylinder, one end of the confining pressure cylinder corresponds to the through hole on the side wall of the simulation shaft, the other end of the confining pressure cylinder is provided with a confining pressure cylinder gland, and the confining pressure cylinder gland is fixedly connected with the side wall of the simulation shaft, so that the confining pressure cylinder is fixedly arranged on the side wall of the simulation shaft; and a plug is fixedly arranged on the confining pressure cylinder pressure cover, and the through hole corresponding to the end part of the real core sample is arranged on the plug.
In a preferred embodiment of the present invention, the confining pressure cylinder gland is provided with a flange, and a plurality of bolts pass through the flange to connect to the side wall of the simulated shaft.
In a preferred embodiment of the present invention, the real core sample is a fractured core sample or a porous core sample; the core sample had random cracks or random porosity therein.
In a preferred embodiment of the present invention, the circumferential sleeve of the real core sample is provided with a cylindrical heat shrinkable sleeve.
In a preferred embodiment of the present invention, a first stepped ring groove is provided inside the confining pressure cylinder gland, a second stepped ring groove is provided around the through hole of the side wall of the simulated shaft, one end of the real core sample is clamped in the first stepped ring groove, and the other end of the real core sample is clamped in the second stepped ring groove; and an O-shaped sealing ring is respectively arranged between the side wall of the first stepped annular groove and the side wall of the second stepped annular groove and the real core sample.
In a preferred embodiment of the present invention, the size of the real core sample is phi 25 × 50mm or phi 38 × 76 mm.
In a preferred embodiment of the present invention, the through hole is connected to an electronic flowmeter; and a pressure sensor is arranged on the inner wall of the simulation shaft.
In a preferred embodiment of the present invention, the cross section of the simulated shaft is square, and the inner diameter of the simulated shaft is 5 inches.
The utility model discloses a stress sensitivity stratum drilling leaking stoppage simulation evaluation device is applied to fractured stratum and porosity leaking stratum leaking stoppage simulation experiments, adopts real rock core indoors, can simulate the circumferential pressure of rock core, can also let the leaking stoppage thick liquid realize the circulation flow in the simulation pit shaft, makes the leaking stoppage material evenly distribute in the leaking stoppage thick liquid; plugging research can be carried out on one or more leakage passages, and the plugging effect of different plugging materials can be evaluated by controlling the circumferential pressure change; the plugging simulation evaluation device provides a theoretical basis for the research of the stress sensitive stratum plugging process and the evaluation of the plugging effect of different plugging materials, and has important significance for the plugging research of the pre-mountain construction zone.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
FIG. 1: do the utility model discloses stress sensitivity stratum drilling leaking stoppage simulation evaluation device's block diagram.
FIG. 2: do the utility model discloses stress sensitivity stratum drilling leaking stoppage simulation evaluation device's schematic structure.
FIG. 3: is a schematic top view of fig. 2.
FIG. 4: is a side view schematic of fig. 2.
FIG. 5: is a partial structure enlarged schematic diagram in fig. 2.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1-5, the utility model provides a stress sensitivity stratum drilling leaking stoppage simulation evaluation device 100, this leaking stoppage simulation evaluation device 100 includes a simulation pit shaft 1, and the fixed simulation leaking layer device 2 that is equipped with a plurality of and simulation pit shaft 1 intercommunication on this simulation pit shaft 1 lateral wall, this simulation leaking layer device 2 comprises sample container 21 and the true core sample 22 of setting in sample container 21, true core sample 22 is the true core that takes out from the actual stratum in the shaft bottom of the drilling field, and this true core sample 22 is fissured core sample or porosity core sample, has random crack in the fissured core sample, has random hole in the porosity core sample; the core sample 22 is cylindrical and has structural dimensions of phi 25 x 50mm or phi 38 x 76mm (both dimensions are international dimensions for core testing); in the embodiment, the plurality of leakage simulation devices 2 are fixedly arranged at the left side and the right side of the simulated shaft 1, three groups of leakage simulation devices 2 which simulate core samples with the diameter of 25 multiplied by 50mm are arranged at one side of the simulated shaft, and three groups of leakage simulation devices 2 which simulate core samples with the diameter of 38 multiplied by 76mm are arranged at the other side of the simulated shaft; the sample containers 21 of the simulated leakage layer devices 2 on the left side and the right side have the same structure but different sizes, and one or more groups of the simulated leakage layer devices 2 can be used according to the experimental requirements; one end of the sample container 21 is communicated with the through hole 13 on the side wall of the simulated shaft 1, the other end of the sample container 21 is provided with a through hole 211, two ends of the real core sample 22 are respectively arranged corresponding to the through hole 13 and the through hole 211, a sealed confining pressure cavity 23 is formed between the peripheral surface of the real core sample 22 and the inner wall of the sample container 21, the confining pressure cavity 23 is communicated with a hydraulic pressure stabilizing source 3 through a pipeline, the hydraulic pressure stabilizing source 3 can inject hydraulic oil into the confining pressure cavity 23 to apply circumferential pressure to the outer peripheral surface of the core sample 22, the circumferential surface of the real core sample 22 is sleeved with a cylindrical heat-shrinkable sleeve 221, the heat-shrinkable sleeve 221 shrinks after being heated, the heat-shrinkable sleeve 221 tightly wraps the lateral circumferential surface of the core sample 22, two end surfaces of the core sample 22 are not wrapped by the heat-shrinkable sleeve, and the heat-shrinkable sleeve 221 can prevent hydraulic oil in the confining pressure cavity 23 from invading into the core sample 22 to influence the mechanical property and the plugging effect of the core sample; one end of the simulation shaft 1 is a leaking stoppage slurry inlet 11, and the other end of the simulation shaft 1 is a leaking stoppage slurry outlet 12; the leaking stoppage slurry inlet 11 is communicated with a slurry pump 4 and can inject leaking stoppage slurry in a slurry pool into the simulation shaft 1; the leaking stoppage slurry outlet 12 is provided with an overflow valve 5, and the outlet of the overflow valve 5 is communicated with the slurry pump 4 through a pipeline so as to form the circulating flow of leaking stoppage slurry; the through hole 211 is connected with an electronic flowmeter (not shown in the figure) to monitor the discharge amount of plugging slurry, and the inner wall of the simulation shaft 1 is provided with a pressure sensor (not shown in the figure) to record the pressure bearing capacity of the plugging material.
The utility model discloses a stress sensitivity stratum drilling leaking stoppage simulation evaluation device 100 when using (for example using one of them group simulation leaking layer device 2, as shown in figure 2, other simulation leaking layer device 2 that do not use can only block up the thru hole of the corresponding simulation pit shaft lateral wall through shutoff board 6), with real rock core sample 22 fixed mounting in sample container 21, at first start hydraulic pressure stabilizing source 3, inject hydraulic oil into confined chamber 23 by hydraulic pressure stabilizing source 3, the pressure rises gradually in sample container 21, at this moment, the circumference of real rock core sample 22 can produce constant pressure, then set the discharge capacity of slush pump 4, and order to let the leaking stoppage thick liquid pour into in the simulation pit shaft 1 gradually, the leaking stoppage thick liquid can flow back to slush pump 4 from overflow valve 5 exit at this moment, the overflow valve 5 is closed gradually in the experimental process, at this moment, the leaking stoppage thick liquid can flow into the crack of real rock core sample 22 and flow out from the through-hole 211 of sample container 21 gradually, along with the gradual rise of the pressure in the simulated shaft 1, plugging slurry can form plugging on the crack of the real lithologic sample 22 in the simulated leakage layer device 2, and when the through hole 211 does not flow out, the plugging is successful; when the pressure exceeds the plugging strength, the plugging slurry can break through the crack of the real lithology sample 22 and flow out of the through hole 211 again; when the plugging slurry effectively plugs the crack, namely when no plugging slurry flows out from the through hole 211, the pressure change in the simulated shaft 1 is recorded until the plugging slurry breaks the crack and flows out from the through hole 211 again, and the maximum pressure-bearing capacity is recorded. The plugging effect of the plugging material can be effectively evaluated by comparing the pressure bearing capacity of different plugging materials.
From the above, the utility model discloses a stress sensitivity stratum drilling leaking stoppage simulation evaluation device is applied to fractured stratum and porosity leakage stratum leaking stoppage simulation experiment, both can simulate the circumferential pressure of rock core, can also let the leaking stoppage thick liquid realize the circulation flow in simulating the pit shaft, make the leaking stoppage material evenly distributed in the leaking stoppage thick liquid; evaluating the plugging effects of different plugging materials by controlling the circumferential pressure change; the plugging simulation evaluation device provides a theoretical basis for research on the stress sensitive stratum plugging process and evaluation on the plugging effect of different plugging materials.
Further, in the present embodiment, as shown in fig. 1 and 5, the sample container 21 includes a confining pressure cylinder 212, one end of the confining pressure cylinder 212 corresponds to the through hole 13 on the side wall of the simulated shaft 1, the other end of the confining pressure cylinder 212 is provided with a confining pressure cylinder press cover 213, and the confining pressure cylinder press cover 213 is fixedly connected with the side wall of the simulated shaft, so as to fix the confining pressure cylinder 212 on the side wall of the simulated shaft; a plug 214 is also fixedly arranged on the confining pressure cylinder gland 213, and the plug 214 can be screwed in a screw hole on the confining pressure cylinder gland 213; the plug 214 is provided with the through hole 211 corresponding to the end of the real core sample 22. The confining pressure cylinder gland 213 is provided with a flange 2131, and a plurality of bolts 215 penetrate through the flange 2131 to fixedly connect the confining pressure cylinder gland 213 to the side wall of the simulated well bore 1.
In this embodiment, as shown in fig. 1, a first stepped ring groove 2132 is provided inside the confining pressure cylinder gland 213, a second stepped ring groove 131 is provided around the through hole 13 of the side wall of the pseudo-wellbore 1, one end of the real core sample 22 is clamped in the first stepped ring groove 2132, and the other end of the real core sample 22 is clamped in the second stepped ring groove 131; as shown in fig. 5, in order to prevent hydraulic oil from entering two end faces of the core sample 22, O-ring seals 222 are respectively disposed between the sidewalls of the first stepped ring groove 2132 and the second stepped ring groove 131 and the real core sample 22, and the O-ring seals 222 can ensure that the hydraulic oil only exerts confining pressure on the circumferential direction of the core sample. In order to prevent the leakage of the hydraulic oil from both ends of the confining pressure cylinder 212, O-ring seals 2121 may be provided at both ends of the confining pressure cylinder 212 in contact with the side wall of the simulated wellbore 1 and the confining pressure cylinder cover 213, respectively.
As shown in fig. 3 and 4, in the present embodiment, the outer shape of the cross section of the pseudo wellbore 1 is a square, and the inner diameter of the pseudo wellbore 1 is 5 inches, which corresponds to the inner diameter of the actual wellbore.
Because there are a lot of cracks around the wall of a well in actual well drilling process, consequently, the utility model discloses stress sensitivity stratum well drilling leaking stoppage simulation evaluation device respectively sets up three simulation leaking layer device in the simulation pit shaft left and right sides, not only can simulate single leaking layer (use a simulation leaking layer device) and can also carry out the simulation of a plurality of leaking layers (use a plurality of simulation leaking layer devices) when carrying out the leaking stoppage experiment, simulates more and is close the true condition like this. Therefore, the device can evaluate single-slit or multi-slit stratums or comprehensively evaluate the fissile and porous stratums, and can comprehensively evaluate a plurality of fissile core samples, a plurality of porous core samples or a plurality of fissile and porous core samples according to the characteristics of different types of stratums in the experimental process.
In the embodiment, the fractured core sample can be a natural fractured core sample, or a real core column can be placed in a vertical press in advance, and after axial pressure is applied to the real core column, random fractures are formed in the core, and then a plugging simulation experiment is performed, so that the fracture state near a well wall in the real drilling process is more approximate.
The utility model discloses a stress sensitivity stratum drilling leaking stoppage simulation evaluation device is applied to fractured stratum and porosity leaking stratum leaking stoppage simulation experiments, adopts real rock core indoors, can simulate the circumferential pressure of rock core, can also let the leaking stoppage thick liquid realize the circulation flow in the simulation pit shaft, makes the leaking stoppage material evenly distribute in the leaking stoppage thick liquid; plugging research can be carried out on one or more leakage passages, and the plugging effect of different plugging materials can be evaluated by controlling the circumferential pressure change; the plugging simulation evaluation device provides a theoretical basis for the research of the stress sensitive stratum plugging process and the evaluation of the plugging effect of different plugging materials, and has important significance for the plugging research of the pre-mountain construction zone.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (9)
1. The utility model provides a stress sensitivity stratum drilling leaking stoppage simulation evaluation device which characterized in that: the leaking stoppage simulation evaluation device comprises a simulation shaft, wherein a plurality of simulation leaking layer devices communicated with the simulation shaft are fixedly arranged on the side wall of the simulation shaft, each simulation leaking layer device comprises a sample container and a real core sample arranged in the sample container, one end of the sample container is communicated with a through hole in the side wall of the simulation shaft, the other end of the sample container is provided with a through hole, two ends of the real core sample are respectively arranged corresponding to the through holes and the through holes, a sealed confining pressure cavity is formed between the peripheral surface of the real core sample and the inner wall of the sample container, and the confining pressure cavity is communicated with a hydraulic pressure stabilizing source through a pipeline; one end of the simulation shaft is a leaking stoppage slurry inlet, the other end of the simulation shaft is a leaking stoppage slurry outlet, the leaking stoppage slurry inlet is communicated with a slurry pump, the leaking stoppage slurry outlet is provided with an overflow valve, and the overflow valve is communicated with the slurry pump through a pipeline to form the circulating flow of the leaking stoppage slurry.
2. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 1, wherein: the real core sample is of a cylindrical structure; the sample container comprises a confining pressure cylinder, one end of the confining pressure cylinder corresponds to the through hole on the side wall of the simulation shaft, the other end of the confining pressure cylinder is provided with a confining pressure cylinder gland, and the confining pressure cylinder gland is fixedly connected with the side wall of the simulation shaft, so that the confining pressure cylinder is fixedly arranged on the side wall of the simulation shaft; and a plug is fixedly arranged on the confining pressure cylinder pressure cover, and the through hole corresponding to the end part of the real core sample is arranged on the plug.
3. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 2, wherein: the confining pressure cylinder gland is provided with a flange, and a plurality of bolts penetrate through the flange to be connected to the side wall of the simulated shaft.
4. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 2, wherein: the real core sample is a fractured core sample or a porous core sample; the core sample had random cracks or random porosity therein.
5. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 2, wherein: the circumferential surface of the real core sample is sleeved with a cylindrical thermal shrinkage sleeve.
6. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 2, wherein: a first stepped ring groove is formed in the inner side of the confining pressure cylinder gland, a second stepped ring groove is formed around the through hole in the side wall of the simulated shaft, one end of the real core sample is clamped in the first stepped ring groove, and the other end of the real core sample is clamped in the second stepped ring groove; and an O-shaped sealing ring is respectively arranged between the side wall of the first stepped annular groove and the side wall of the second stepped annular groove and the real core sample.
7. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 2, wherein: the size of the real core sample is phi 25 multiplied by 50mm or phi 38 multiplied by 76 mm.
8. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 1, wherein: the through hole is connected with an electronic flowmeter; and a pressure sensor is arranged on the inner wall of the simulation shaft.
9. The simulation evaluation device for drilling leakage stoppage of the stress-sensitive stratum as claimed in claim 1, wherein: the cross section of the simulated shaft is square, and the inner cylinder diameter of the simulated shaft is 5 inches.
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| CN2010206260230U CN201902206U (en) | 2010-11-24 | 2010-11-24 | Leakage stopping simulation evaluation device for well drilling in stress-sensitive formation |
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| CN102011581A (en) * | 2010-11-24 | 2011-04-13 | 中国石油大学(北京) | Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| CN102305045A (en) * | 2011-08-05 | 2012-01-04 | 中联煤层气国家工程研究中心有限责任公司 | Shaft crack simulator |
| CN102900431A (en) * | 2012-09-06 | 2013-01-30 | 中国石油化工股份有限公司 | Plugging simulation experiment device for horizontal well |
| CN103926267A (en) * | 2014-04-28 | 2014-07-16 | 西安石油大学 | Method for quantitatively evaluating pore throat change degree in stress sensitive process |
| CN106383221A (en) * | 2016-11-02 | 2017-02-08 | 中国石油大学(北京) | Stratum stress sensitive experiment testing method and device |
| CN107976520A (en) * | 2017-12-08 | 2018-05-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Nearly well band temporarily blocks up simulating lab test device and method |
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| CN102011581A (en) * | 2010-11-24 | 2011-04-13 | 中国石油大学(北京) | Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| CN102011581B (en) * | 2010-11-24 | 2013-02-06 | 中国石油大学(北京) | Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| CN102305045A (en) * | 2011-08-05 | 2012-01-04 | 中联煤层气国家工程研究中心有限责任公司 | Shaft crack simulator |
| CN102900431A (en) * | 2012-09-06 | 2013-01-30 | 中国石油化工股份有限公司 | Plugging simulation experiment device for horizontal well |
| CN102900431B (en) * | 2012-09-06 | 2015-11-25 | 中国石油化工股份有限公司 | Horizontal well shutoff analogue experiment installation |
| CN103926267A (en) * | 2014-04-28 | 2014-07-16 | 西安石油大学 | Method for quantitatively evaluating pore throat change degree in stress sensitive process |
| CN103926267B (en) * | 2014-04-28 | 2016-05-04 | 西安石油大学 | A kind of method of pore throat intensity of variation in quantitative assessment stress sensitive process |
| CN106383221A (en) * | 2016-11-02 | 2017-02-08 | 中国石油大学(北京) | Stratum stress sensitive experiment testing method and device |
| CN107976520A (en) * | 2017-12-08 | 2018-05-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Nearly well band temporarily blocks up simulating lab test device and method |
| CN107976520B (en) * | 2017-12-08 | 2024-11-01 | 中国石油天然气集团有限公司 | Near-well-zone temporary plugging indoor simulation experiment device and method |
| CN112219009B (en) * | 2018-04-24 | 2022-07-19 | 沙特阿拉伯石油公司 | An intelligent system for selecting materials for wellbore drilling fluids to stop loss |
| US11268369B2 (en) | 2018-04-24 | 2022-03-08 | Saudi Arabian Oil Company | Smart system for selection of wellbore drilling fluid loss circulation material |
| CN112219009A (en) * | 2018-04-24 | 2021-01-12 | 沙特阿拉伯石油公司 | Intelligent system for selecting wellbore drilling fluid plugging material |
| CN112326888B (en) * | 2020-11-04 | 2021-11-02 | 中国石油大学(北京) | An experimental device for crack plugging simulation and its experimental method |
| CN112326888A (en) * | 2020-11-04 | 2021-02-05 | 中国石油大学(北京) | Experimental device and experimental method for fracture plugging simulation |
| US20230141812A1 (en) * | 2020-11-11 | 2023-05-11 | China University Of Petroleum-Beijing | Dynamic crack leaking stoppage evaluation experiment device and experiment method |
| US12196722B2 (en) * | 2020-11-11 | 2025-01-14 | China University Of Petroleum-Beijing | Dynamic crack leaking stoppage evaluation experiment device and experiment method |
| CN113029793A (en) * | 2021-03-02 | 2021-06-25 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation method |
| CN113029793B (en) * | 2021-03-02 | 2022-06-14 | 中国石油大学(北京) | Hard and brittle shale crack opening simulation method |
| WO2025236549A1 (en) * | 2024-05-13 | 2025-11-20 | 江苏凯伦建材股份有限公司 | Demonstration method for sealing performance of leak repair material |
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