CN104406768A - Fracture flow simulation experiment device and method for fiber blend support agent - Google Patents
Fracture flow simulation experiment device and method for fiber blend support agent Download PDFInfo
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- CN104406768A CN104406768A CN201410716424.8A CN201410716424A CN104406768A CN 104406768 A CN104406768 A CN 104406768A CN 201410716424 A CN201410716424 A CN 201410716424A CN 104406768 A CN104406768 A CN 104406768A
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Abstract
The invention discloses a fracture flow simulation experiment device and method for a fiber blend support agent. The device comprises a fracture box body, wherein a primary fracture box body is fixedly arranged in the fracture box body; a fracture inlet is formed in the fracture surface of the primary fracture box body; the primary fracture box body is communicated with an injection pump through the fracture inlet; a working material liquid storage tank which stores working materials is connected to the upper part of the injection pump; a secondary fracture box body is arranged in the primary fracture box body; a hydraulic cavity liquid inlet and a hydraulic cavity liquid outlet are formed in the front part of a hydraulic cavity in sequence from top to bottom; the hydraulic cavity liquid inlet is connected with a hydraulic cavity injection pump and a hydraulic cavity working liquid storage tank through pipelines in sequence. The fracture flow simulation evaluation method for the fiber blend support agent comprises the following steps: inspecting and connecting the device; dosing; switching on the fracture closing pressure simulation device. According to the device, the motion process of the fiber blend support agent in a fracture can be really simulated, the operation is safe and simple, and the automation level and the result credibility are high.
Description
Technical field
The present invention relates to a kind of fibers mixture propping agent flow in fracture analogue experiment installation and method, belong to oil fracturing field.
Background technology
It is contradiction in order to solve after Oil/gas Well pressure the row of returning and proppant backflow fast that fibre technology is applied in Sand Fracturing Technology the earliest, namely drain age velocity just may exceed the critical flow velocity that shakes out too soon, cause propping agent to return to tell, too low clean-up time increase and the row of returning of causing again of drain age velocity leads reduction.Be mixed in sand-carrying agent inject stratum simultaneously having certain flexible fibrous matter, in man-made fracture, form compositeness propping agent, propping agent is matrix, and fiber is wild phase.The prop-carrying capacity that the adding of fiber can improve sand-carrying agent, control the backflow of propping agent, realize the stability etc. of the row of returning and maintenance proppant pack fast.
Fiber, for preventing proppant backflow successful, obtains the great attention of domestic and international oil worker, and then has carried out extensive research to it, and has carried out application in a big way at each major field.With the progress and development of fracturing technique, fiber is expanded and extend further in the application in fracturing technique field, define at present with fiber prevention proppant backflow, understressed sand fibre sand prevention pressure break, the sandfrac of low viscosifying agent fiber whole process companion note network as agent technology, with in fiber seam temporarily stifled turnaround fracture, Hi-way passage pressure break, " broadband " pressure break be the fiber fracturing technology series of cutting edge technology, show wide popularizing application prospect and marketable value.
But fiber fracturing technical foundation is theoretical and in-house laboratory investigation lags behind engineering practice, makes this technology lack theoretical direction necessary, science, system, become the bottleneck that this technology of restriction further develops and applies.In the research of fiber fracturing technology experiment, more with regard to the dispersiveness of fiber, compatibility, the outstanding Static Property Study such as grittiness, degradability both at home and abroad, and just more can reflect that fiber distributes in crack directly, comprehensively, block up, stablize in the dynamic flow simulation of sand body characteristic temporarily, conventional preset fiber sand-packed model or the rock core frac-pack fiber mode of riving that adopts is evaluated more, these means all cannot simulate the injection after fiber and mixed with proppants, migration and the distributional pattern in crack, differ greatly with fiber fracturing scene is actual.The disappearance of laboratory experiment simulation means, makes migration rule in crack of fiber and propping agent and distribution mode intuitively not to show, can only assume, and the experimental result reliability recorded is poor, hinders further developing of this technology.
Summary of the invention
Due to the injection after simulation fiber and mixed with proppants, migration and the distributional pattern in crack, differ greatly with fiber fracturing scene is actual.The disappearance of laboratory experiment simulation means, makes migration rule in crack of fiber and propping agent and distribution mode intuitively not to show, can only assume, and the experimental result reliability recorded is poor, hinders further developing of this technology.
The present invention is directed to above-mentioned situation and carry out scientific and reasonable analysis, a kind of fibers mixture propping agent flow in fracture analogue experiment installation of independent research and method.
The technical solution used in the present invention is:
A kind of fibers mixture propping agent flow in fracture analogue experiment installation, comprise crack box body, described crack tray interior is fixed with crack main box body, crack main box body fracture plane is provided with crack charging aperture, crack main box body is communicated with injection pump by crack charging aperture, the work material fluid reservoir of storage work material is connected with above injection pump, main box body inside, described crack is equipped with crack auxiliary box body, described crack auxiliary box body fracture plane is relative with crack main box body fracture plane, crack auxiliary box body and crack main box body are by rotating shaft active link, hydraulic cavities is provided with between crack auxiliary box body and crack main box body fracture plane, hydraulic cavities inlet and hydraulic cavities liquid outlet is disposed with from top to bottom before described hydraulic cavities, described hydraulic cavities inlet by pipeline successively with hydraulic cavities injection pump, hydraulic cavities working fluid storage tank connects, described hydraulic cavities liquid outlet place is connected with tensimeter in turn, check valve, fluid reservoir.
The tip of described crack main box body is provided with liquid outlet, and the endpiece material storage tank that this liquid outlet is provided with by pipeline and outside is connected.
Hydraulic cavities is connected by packoff with crack main box body.
Described packoff is fluid sealant.
The female form of described glass, glass sub-window outside are provided with camera, and described camera is circumscribed with computing machine.
Described hydraulic cavities is air bag.
A kind of fibers mixture propping agent flow in fracture analogue experiment method, comprises the following steps:
(1) check the integrity of fibers mixture propping agent flow in fracture analogue experiment installation, open constant temperature oven simulated formation temperature; Constant temperature oven provides temperature, with simulated formation temperature conditions for whole experiment;
(2) fracturing liquid spearhead is placed in working fluid fluid reservoir, early stage first struts crack with it; Fibers mixture propping agent and of the fracturing fluid potpourri configure and are placed on another working fluid fluid reservoir; Inject this potpourri after strutting crack, the mass ratio of fiber and propping agent is 5-30%;
(3) according to reservoir actual conditions, apply pressure by fracture closure pressure analogue means to crack box body, reach 30-60MPa simulation fracture clossing pressure;
(4) arranging endpiece check valve force value by tensimeter is 20-30MPa, and shutoff pressure exceedes this value liquid and discharges from entrance point, then discharges from endpiece lower than this value;
(5) in crack, the fracturing liquid spearhead that can strut crack is injected by injection pump, force fracture open, then the pipeline reaching 5-8mm by injection pump 1 and internal diameter injects a certain amount of fiber, propping agent and of the fracturing fluid mixed liquor, use material movement situation in camera record crack, use force value in tensimeter record seam, and observe crack endpiece fluid situation;
(6) after the interior motion conditions record of fibers mixture propping agent seam, crack main box body, crack auxiliary box body are continued to place the some time in constant temperature oven, in order to observed and recorded fiber degradation situation, the impact of injection pressure in fiber degradation opposite joint can be simulated by re-injecting fracturing liquid spearhead;
(7), after having tested, discharge the pressure of whole experiment fibers mixture propping agent flow in fracture analogue experiment installation used, maintaining experimental facilities, and arrange, analysis design mothod data.
Technique effect of the present invention is:
By a set of experimental provision for simulating fibers mixture propping agent flow state in crack of fluid reservoir, pump, pipeline, seam body, withstand voltage glass vision panel, camera system, the vertical compression system in crack, pressure tester and thermostat composition, make handling safety, simple;
By appropriate design source line, entrance perforation size, crack opening ways, withstand voltage glass vision panel and camera system, realize the displaying directly perceived of fibers mixture propping agent flow state in crack.By fibers mixture propping agent inlet device, seam body, the vertical compression system in crack, pressure tester and thermostat etc., accurate simulation fiber fracturing breakthrough pressure and research fibre length diameter parameters, injection technology parameter, whether degrade to the affecting laws of pressure, such novel structure.
Based on the fibers mixture propping agent flow in fracture analogue experiment installation of design, set up the fibers mixture propping agent flow in fracture simulation evaluation method integrating the flow processs such as dosing, pressure testing, infusion, pressure measurement, shooting record; This experimental provision and method can simulate fibers mixture propping agent motion process in crack more truly, and handling safety, simple, automaticity and credible result degree are high.
Be described in detail below with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 fibers mixture propping agent flow in fracture analogue experiment installation schematic diagram.
Fig. 2 crack box body schematic diagram.
Fig. 3 crack main box body schematic diagram.
Fig. 4 crack auxiliary box body schematic diagram.
In figure, accompanying drawing illustrates: 1, injection pump; 2, work material storage tank; 3, crack charging aperture; 4, fracture plane tracks; 5, crack box body; 6, camera; 7, computing machine; 8, endpiece material storage tank; 9, hydraulic cavities working fluid; 10, hydraulic cavities injection pump; 11, fluid reservoir; 12, check valve; 13, hydraulic cavities inlet; 14, hydraulic cavities liquid outlet; 15, hydraulic cavities; 16; Packoff; 17, crack main box body; 18, crack auxiliary box body; 19, rotating shaft; 20, the female form of glass; 21, glass sub-window; 22, tensimeter.
Embodiment
Embodiment 1:
Because fiber fracturing technical foundation is theoretical and in-house laboratory investigation lags behind engineering practice, make this technology lack theoretical direction necessary, science, system, become the bottleneck that this technology of restriction further develops and applies.In the research of fiber fracturing technology experiment, more with regard to the dispersiveness of fiber, compatibility, the outstanding Static Property Study such as grittiness, degradability both at home and abroad, and just more can reflect that fiber distributes in crack directly, comprehensively, block up, stablize in the dynamic flow simulation of sand body characteristic temporarily, conventional preset fiber sand-packed model or the rock core frac-pack fiber mode of riving that adopts is evaluated more, these means all cannot simulate the injection after fiber and mixed with proppants, migration and the distributional pattern in crack, differ greatly with fiber fracturing scene is actual.The disappearance of laboratory experiment simulation means, makes migration rule in crack of fiber and propping agent and distribution mode intuitively not to show, can only assume, and the experimental result reliability recorded is poor, hinders further developing of this technology.
The present invention is directed to above-mentioned situation and carry out scientific and reasonable analysis, a kind of fibers mixture propping agent flow in fracture analogue experiment installation of independent research and method, a kind of fibers mixture propping agent flow in fracture analogue experiment installation as shown in Figure 1, comprise crack box body 5, box body 5 inside, described crack is fixed with crack main box body 17, crack main box body 17 fracture plane is provided with crack charging aperture 3, crack main box body 17 is communicated with injection pump 1 by crack charging aperture 3, the work material fluid reservoir 2 of storage work material is connected with above injection pump 1, main box body 17 inside, described crack is equipped with crack auxiliary box body 18, described crack auxiliary box body 18 fracture plane is relative with crack main box body 17 fracture plane, crack auxiliary box body 18 and crack main box body 17 are by rotating shaft 19 active link, hydraulic cavities 15 is provided with between crack auxiliary box body 18 and crack main box body 17 fracture plane, described hydraulic cavities 15 is disposed with hydraulic cavities inlet 13 and hydraulic cavities liquid outlet 14 above from top to bottom, described hydraulic cavities inlet 13 by pipeline successively with hydraulic cavities injection pump 10, hydraulic cavities working fluid storage tank 9 connects, described hydraulic cavities liquid outlet 14 place is connected with tensimeter 22 in turn, check valve 12.
As Fig. 2, Fig. 3, box body 5 inside, crack described in Fig. 4 is provided with crack main box body 17, crack auxiliary box body 18 is equipped with in described crack main box body 17, described crack auxiliary box body 18 fracture plane is relative with crack main box body 17 fracture plane, and can rotate centered by rotating shaft 19, described crack main box body 17 and auxiliary box body 18 crack, described crack wall are equipped with the female form 20 of glass, glass sub-window 21, the tip of described crack main box body 17 is provided with liquid outlet, the endpiece material storage tank 8 that this liquid outlet is provided with by pipeline and outside is connected, liquid in such crack main box body 17 is discharged by liquid outlet and is stored in endpiece material storage tank 8, record with the liquid outlet quantity of endpiece material storage tank 8 and judge, thus obtain experiment effect.
Be provided with fracture plane tracks 4 above hydraulic cavities 15 described in fluid reservoir 11, crack auxiliary box body 18 swings in fracture plane tracks 4.
For storing the fluid reservoir 2 of work material, the injection pump 1 material being injected Fracture System and pipeline in the present embodiment, for ensureing the smooth injection of fiber and proppant mixture, injection pump discharge capacity used is higher, and pump discharge internal diameter and pipeline internal diameter are comparatively large, the common component material injection device of material storage flow container 2, injection pump 1 and pipeline.
Fracture closure pressure analogue means is by fracture plane tracks 4, hydraulic cavities 15, hydraulic cavities working fluid storage tank 9, hydraulic cavities injection pump 10, hydraulic cavities inlet 13, hydraulic cavities liquid outlet 14, hydraulic cavities outlet check valve 12 and crack box body 5 form with packoff 16, crack box body 5 and hydraulic cavities 15 are provided with the carriage matched with fracture plane tracks 4, hydraulic cavities is forced to expand by injecting working fluid in hydraulic cavities 15, thus promotion crack auxiliary box body 18 moves to crack main box body 17, reach the object applying fracture closure pressure, its force value can be read by hydraulic cavities tensimeter 22.
Fracture System is made up of crack main box body 17, crack auxiliary box body 18 and rotating shaft 19, crack auxiliary box body 18 is placed in crack main box body 17, make crack auxiliary box body 18 fracture plane relative with crack main box body 17 fracture plane, and can rotate centered by rotating shaft 19, thus simulation fracture breakdown action, crack main box body 17 and crack auxiliary box body 18 surface of contact adopt encapsulant to seal, liquid outlet and endpiece material storage tank 8 is provided with in box body rotating shaft 19 part, in order to collect the material flowing out crack, exit portion pipeline is provided with check valve, for controlling outlet pressures; Crack main box body 17 and crack auxiliary box body 18 crack wall are equipped with glass female form 20, glass sub-window 21, for observing fiber and proppant mixture motion morphology in crack.
Embodiment 2:
On basis based on embodiment 1, also comprise camera 6, described camera 6 is arranged on the female form 20 of described glass, glass sub-window 21 is outside, and described camera 6 is circumscribed with computing machine 7.
Camera 6 is high-speed camera head, and the present embodiment selected pixels is that the high-speed camera head of 300w is to record of making a video recording.
Glass female form 20, the external camera 6 be connected with computing machine 7 of glass sub-window 21, opening for recording crack, extending and materials inside flow state.
Connect external computer 7, directly can process data, efficiently reach simulated state fast.
Embodiment 3:
Based in embodiment 1 and embodiment 2 for adopt preset fiber sand-packed model or rock core rive frac-pack fiber mode simulation fiber temporarily stifled, stablize the experimentation such as sand body, breakthrough pressure and actual difference comparatively greatly, the problem of acquired results poor reliability, whether the present invention, by fibers mixture propping agent inlet device, seam body, the vertical compression system in crack, pressure tester and thermostat etc., accurate simulation fiber fracturing breakthrough pressure and research fibre length diameter parameters, injection technology parameter, degrades to the affecting laws of pressure.
Based on the fibers mixture propping agent flow in fracture analogue experiment installation of design, set up the fibers mixture propping agent flow in fracture simulation evaluation method integrating the flow processs such as dosing, pressure testing, infusion, pressure measurement, shooting record.
Meanwhile, the invention also discloses a kind of easy and simple to handle, realize convenient, flexible operation mode and automaticity and the high fibers mixture propping agent flow in fracture simulation evaluation method of credible result degree, it is characterized in that the method comprises the following steps:
(1) check the integrity of fibers mixture propping agent flow in fracture analogue experiment installation, open constant temperature oven simulated formation temperature; Constant temperature oven provides temperature, with simulated formation temperature conditions for whole experiment;
(2) fracturing liquid spearhead is placed in working fluid fluid reservoir 2, early stage first struts crack with it; Fibers mixture propping agent and of the fracturing fluid potpourri configure and are placed on another working fluid fluid reservoir 2; Inject this potpourri after strutting crack, the mass ratio of fiber and propping agent is 5-30%, and fiber is generally with pressure break biodegradable fiber, and propping agent selects silica sand here;
(3) according to reservoir actual conditions, apply pressure by fracture closure pressure analogue means to crack box body 5, reach 30-60MPa simulation fracture clossing pressure;
(4) arranging endpiece check valve force value by tensimeter 22 is 20-30MPa, and shutoff pressure exceedes this value liquid and discharges from entrance point, then discharges from endpiece lower than this value;
(5) in crack, the fracturing liquid spearhead that can strut crack is injected by injection pump 1, force fracture open, then the pipeline reaching 5-8mm by injection pump 1 and internal diameter injects a certain amount of fiber, propping agent and of the fracturing fluid mixed liquor, camera 6 is used to record material movement situation in crack, use tensimeter 22 to record force value in seam, and observe crack endpiece fluid situation;
(6) after the interior motion conditions record of fibers mixture propping agent seam, crack main box body 17, crack auxiliary box body 18 are continued to place the some time in constant temperature oven, in order to observed and recorded fiber degradation situation, the impact of injection pressure in fiber degradation opposite joint can be simulated by re-injecting fracturing liquid spearhead;
(7), after having tested, discharge the pressure of whole experiment fibers mixture propping agent flow in fracture analogue experiment installation used, maintaining experimental facilities, and arrange, analysis design mothod data.
In experimentation, different temperature is set by constant temperature oven, to simulate the fibers mixture propping agent motion conditions under different temperatures; Interior motion conditions is stitched by the fiber of configuration variable concentrations fibers mixture propping agent and of the fracturing fluid mixed liquor simulation variable concentrations; Different clossing pressures is set by fracture closure pressure analogue means and simulates fibers mixture propping agent motion conditions under different fracture closure pressure; In fibers mixture propping agent seam after motion conditions record, continuing to place fiber degradation situation under different time simulation different times, the impact of injection pressure in fiber degradation opposite joint under different time can be simulated by re-injecting fracturing liquid.
The fracturing liquid spearhead that the present embodiment adopts, fracturing liquid are all conventional reagent, do not do requirement here, if chemical reagent involved in the present invention does not do specified otherwise, are the reagent of routine well known in the art.
This experimental provision is except mobility status in simulation fibers mixture propping agent seam, and be equally applicable to pure fiber slug, pure particle diverting agent slug, gel slug, the mobility status of pure propping agent in crack, basic experiment step is the same.
More than by embodiment, the present invention is specifically described; what be necessary to herein means out be the present embodiment is only preferred embodiment of the present invention; not the present invention is imposed any restrictions; every following examples are done according to the technology of the present invention essence any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.The parts that the present embodiment does not describe in detail and structure &processes belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (7)
1. a fibers mixture propping agent flow in fracture analogue experiment installation, it is characterized in that: comprise crack box body (5), box body (5) inside, described crack is fixed with crack main box body (17), crack main box body (17) fracture plane is provided with crack charging aperture (3), crack main box body (17) is communicated with injection pump (1) by crack charging aperture (3), injection pump (1) top is connected with the work material fluid reservoir (2) of storage work material, main box body (17) inside, described crack is equipped with crack auxiliary box body (18), described crack auxiliary box body (18) fracture plane is relative with crack main box body (17) fracture plane, crack auxiliary box body (18) and crack main box body (17) are by rotating shaft (19) active link, hydraulic cavities (15) is provided with between crack auxiliary box body (18) and crack main box body (17) fracture plane, described hydraulic cavities (15) is disposed with hydraulic cavities inlet (13) and hydraulic cavities liquid outlet (14) above from top to bottom, described hydraulic cavities inlet (13) by pipeline successively with hydraulic cavities injection pump (10), hydraulic cavities working fluid storage tank (9) connects, described hydraulic cavities liquid outlet (14) place is connected with tensimeter (22) in turn, check valve (12), fluid reservoir (11).
2. a kind of fibers mixture propping agent flow in fracture analogue experiment installation according to claim 1, it is characterized in that: the tip in described crack main box body (17) is provided with liquid outlet, the endpiece material storage tank (8) that this liquid outlet is provided with by pipeline and outside is connected.
3. a kind of fibers mixture propping agent flow in fracture analogue experiment installation according to claim 1, is characterized in that: described hydraulic cavities (15) is connected by packoff (16) with crack main box body (17).
4. a kind of fibers mixture propping agent flow in fracture analogue experiment installation according to claim 3, is characterized in that: described packoff (16) is fluid sealant.
5. a kind of fibers mixture propping agent flow in fracture analogue experiment installation according to claim 1, it is characterized in that: the female form (20) of described glass, glass sub-window (21) outside are provided with camera (6), and described camera (6) is circumscribed with computing machine (7).
6. a kind of fibers mixture propping agent flow in fracture analogue experiment installation according to claim 1, is characterized in that: described hydraulic cavities (15) is air bag.
7. provide a kind of fibers mixture propping agent flow in fracture analogue experiment method it is characterized in that according to any one fibers mixture propping agent flow in fracture analogue experiment installation described in claim 1-6: to comprise the following steps:
(1) check the integrity of fibers mixture propping agent flow in fracture analogue experiment installation, open constant temperature oven simulated formation temperature; Constant temperature oven provides temperature, with simulated formation temperature conditions for whole experiment;
(2) fracturing liquid spearhead is placed in working fluid fluid reservoir (2), early stage first struts crack with it; Fibers mixture propping agent and of the fracturing fluid potpourri configure and are placed on another working fluid fluid reservoir (2); Inject this potpourri after strutting crack, the mass ratio of fiber and propping agent is 5-30%;
(3) according to reservoir actual conditions, apply pressure by fracture closure pressure analogue means to crack box body (5), reach 30-60MPa simulation fracture clossing pressure;
(4) arranging endpiece check valve force value by tensimeter (22) is 20-30MPa, and shutoff pressure exceedes this value liquid and discharges from entrance point, then discharges from endpiece lower than this value;
(5) in crack, the fracturing liquid spearhead that can strut crack is injected by injection pump (1), force fracture open, then the pipeline reaching 5-8mm by injection pump 1 and internal diameter injects a certain amount of fiber, propping agent and of the fracturing fluid mixed liquor, use material movement situation in camera (6) record crack, use force value in tensimeter (22) record seam, and observe crack endpiece fluid situation;
(6) after the interior motion conditions record of fibers mixture propping agent seam, crack main box body (17), crack auxiliary box body (18) are continued to place the some time in constant temperature oven, in order to observed and recorded fiber degradation situation, the impact of injection pressure in fiber degradation opposite joint can be simulated by re-injecting fracturing liquid spearhead;
(7), after having tested, discharge the pressure of whole experiment fibers mixture propping agent flow in fracture analogue experiment installation used, maintaining experimental facilities, and arrange, analysis design mothod data.
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| CN104914040A (en) * | 2015-06-03 | 2015-09-16 | 中国石油天然气股份有限公司 | Fracturing fluid performance test system and fracturing fluid performance test method |
| CN104914040B (en) * | 2015-06-03 | 2017-09-15 | 中国石油天然气股份有限公司 | Fracturing fluid property test system and method |
| CN104963673A (en) * | 2015-07-13 | 2015-10-07 | 中国石油大学(北京) | Visualization experiment device for simulating temporary plugging of hydraulic fractures by fiber diversion agent |
| CN105484722A (en) * | 2015-11-25 | 2016-04-13 | 中国石油大学(华东) | Device and work method for simulating channel fracture pump injecting mode and measuring channel rate |
| CN105484722B (en) * | 2015-11-25 | 2018-06-05 | 中国石油大学(华东) | The device and method of work of a kind of analog channel fracturing pump note mode and Measurement channel rate |
| CN107218035A (en) * | 2017-06-13 | 2017-09-29 | 北京大学 | A kind of experimental provision of automatic change crack wall mill resistance and method of work and application |
| CN108505967A (en) * | 2018-04-08 | 2018-09-07 | 西南石油大学 | Experimental provision is temporarily blocked up in a kind of oil/gas well eyelet and crack |
| CN110273680A (en) * | 2019-07-22 | 2019-09-24 | 西安石油大学 | A kind of reversible formula parallel board slit simulation apparatus and method |
| CN112611856A (en) * | 2020-11-26 | 2021-04-06 | 重庆交通职业学院 | Microbial remediation test device capable of changing crack angle |
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| CN113006762A (en) * | 2021-03-15 | 2021-06-22 | 中国石油大学(华东) | Visual proppant laying and post-pressing production simulation device considering real fracture closure pressure |
| CN113006762B (en) * | 2021-03-15 | 2022-07-22 | 中国石油大学(华东) | Visual proppant laying and post-pressing production simulation device considering real fracture closing pressure |
| CN114837645A (en) * | 2022-04-28 | 2022-08-02 | 西南石油大学 | Device and method for researching migration-blocking process of temporary blocking agent in hydraulic fracture |
| CN114837645B (en) * | 2022-04-28 | 2023-07-07 | 西南石油大学 | Device and method for researching migration-blocking process of temporary blocking agent in hydraulic fracture |
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