CN203248148U - Drilling fluid and rock interaction simulating and evaluating system - Google Patents

Drilling fluid and rock interaction simulating and evaluating system Download PDF

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Publication number
CN203248148U
CN203248148U CN 201220610065 CN201220610065U CN203248148U CN 203248148 U CN203248148 U CN 203248148U CN 201220610065 CN201220610065 CN 201220610065 CN 201220610065 U CN201220610065 U CN 201220610065U CN 203248148 U CN203248148 U CN 203248148U
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CN
China
Prior art keywords
plug
pressure
evaluation
chamber
drilling fluid
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Application number
CN 201220610065
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Chinese (zh)
Inventor
石秉忠
陈曾伟
徐江
林永学
梅春桂
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中国石油化工股份有限公司
中国石油化工股份有限公司石油工程技术研究院
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Priority to CN 201220610065 priority Critical patent/CN203248148U/en
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Publication of CN203248148U publication Critical patent/CN203248148U/en

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Abstract

The utility model relates to a drilling fluid and rock interaction simulating and evaluating system. The system can simulate a borehole wall rock pressure environment in a formation condition. A rubber sleeve is employed to apply a confining pressure. A slide bulkhead is employed to apply an axial pressure. A static head of drilling fluid is employed to apply a liquid column pressure. A drill hole in the center of a rock core is employed to provide a flowing channel in the rock core for the drilling fluid. According to the system, pressure sensors are connected by sleeving joints so as to measure the fluid pressure transmission during the seepage of the drilling fluid in borehole wall rocks; a touching force sensor is employed to measure the expansion stress of a rock skeleton; and a three-dimensional CT imaging instrument is employed to measure the microscopic crack aperture change of the rock core and the formation state of a filter cake in real time.

Description

Drilling fluid rock interaction Simulation evaluation system

Technical field

The utility model belongs to field of oil drilling, is specifically related to a kind of drilling fluid rock interaction Simulation evaluation system.

Background technology

Borehole well instability is one of difficult problem of puzzlement petroleum industrial circle, and is annual huger to the World Oil Industry economic loss because of it.Therefore, the borehole wall stability problem is the one of the main reasons of restriction drilling cost and exploration and development speed.Although the related researcher has carried out a large amount of research to Wellbore Stability, obtained certain progress, but it is not still deep enough to the borehole well instability research on mechanism, main cause is summed up as the power coupling and causes borehole well instability, and the present laboratory experiment evaluation means complete power coupling process between drilling fluid and the rock of borehole under the simulation wellbore hole condition also.

Existing triaxial stress instrument ex hoc genus anne product only can be analyzed borehole well instability mechanism from mechanical characteristic; Linear expansion instrument, aging dispersion experiment also are to analyze the borehole well instability characteristic from chemical aspect; And generally for the core holding unit of studying the rock core physical property, also only limit to measure the basic physical properties parameters such as core porosity under the formation temperature pressure condition, permeability, resistivity, can't simulate under confined pressure, axial compression and head of liquid while existence condition, drilling fluid causes the isoparametric dynamic change of pore pressure, swelling stress, fracture pattern of rock self.The Changing Pattern of these physical parameters has very important significance to estimating borehole wall stability.At present, but the laboratory apparatus that lacks the analog force coupling, restricted to a great extent further going deep into of borehole well instability mechanism research, for promoting going deep into of borehole well instability mechanism research, be necessary to research and develop the Novel experimental evaluation means, really under the simulation well under the reset condition, under the comprehensive function of pressure, temperature and different salinity formation waters, the physical property Changing Pattern that rock produces.

The utility model content

The utility model relates to a kind of pit shaft simulation evaluation system, can realize that confined pressure, axial compression and head of liquid are to the synchronous loading of rock core, under drilling fluid dynamic circulation state, the features such as the pore pressure of real-time measurement rock, swelling stress, fracture pattern variation are for the drilling fluid rock interaction mechanism under the research formation condition provides the basis.

The rock of borehole pressure environment of the utility model under can simulation stratum condition applies confined pressure by rubber bush, and sliding plug applies axial compression, and the hydrostatic head of drilling fluid applies head of liquid, and the boring of rock core central authorities provides the flow channel of drilling fluid in rock core.The utility model is also by wearing the fluid pressure transmission during seepage flow in rock of borehole of joint Bonding pressure sensor measurement drilling fluid, measure the swelling stress of rock matrix by touch force sensor, measure in real time the micro crack hole variation of rock core and the formation state of mud cake by the three-D CT imaging instrument.

The utility model provides a kind of drilling fluid rock interaction Simulation evaluation system, comprising:

Core chamber, it is used for placing rock core (being the columned rock of central zone circular hole), in order to simulation well Zhou Yanshi;

The first plug, it is divided into the first plug end and the first plug fixed part; The intersection of one end of described the first plug end and core chamber is the first drilling well liquid chamber, and described the first drilling well liquid chamber is connected with the rock core central circular hole, described the first drilling well liquid chamber with by passing the circulation of drilling fluid pipeline UNICOM of the first plug end;

The second plug, it is divided into the second plug end and the second plug fixed part; There is the second drilling well liquid chamber the intersection of described the second plug end and core chamber's other end, and described the second drilling well liquid chamber is connected with the rock core central circular hole;

The axial compression chamber, it is the middle cavity of U-shaped the 3rd plug of the second plug and the second plug fixed part that is arranged on the second plug; Be provided with the telescopic circulation of drilling fluid pipeline of helical form in the axial compression chamber, described circulating line one end is communicated with the outside of described evaluation system, and the other end is communicated with the first drilling well liquid chamber; The axial compression chamber links to each other with axial compression fluid line in being arranged on the 3rd plug;

Described core chamber, the first plug, the second plug, the 3rd plug and axial compression chamber all are arranged in the pressure-bearing cylinder;

Described the first plug fixed part and the second plug fixed part are fixed in the pressure-bearing cylinder by screw shell;

The outside of described the first plug end, the second plug end and core chamber is provided with rubber bush, and the first plug end is provided with sensor;

The diameter of described rubber bush is less than the pressure-bearing cylinder, and rubber bush is provided with a plurality of joints that wear, and the described joint that wears is connected by the sensor of wire with pressure-bearing cylinder outside.

Described evaluation system also comprises the confined pressure chamber, and it is formed by the space between rubber bush and the first plug fixed part and the second plug fixed part and the pressure-bearing cylinder, and it is by being connected with the confined pressure fluid line at connector disposed thereon.

The plug end of described the first plug is provided with sensor.

Constant-flux pump, it is connected in the second drilling well liquid chamber by the circulation of drilling fluid pipeline.

Slurry tank, it is connected to described constant-flux pump and the first drilling well liquid chamber.

Pressure controller, it is connected to slurry tank and the first drilling well liquid chamber through the circulation of drilling fluid pipeline;

Pressure sensor, it is connected to constant-flux pump and the second drilling well liquid chamber through the circulation of drilling fluid pipeline.

Radiographic source and ray dash receiver; Described radiographic source and ray dash receiver are arranged at respectively the both sides of described pressure-bearing cylinder outside.

Core chamber's diameter is 5cm in the utility model, and coring is the cylindric of central zone circular hole, and external diameter 5cm is in order to simulation well Zhou Yanshi; Rock core central authorities are drilled with the circular hole that internal diameter is 1cm, the well of simulation diameter 1cm.The first plug end of the first plug and the circular hole intersection of rock core are that internal diameter is the drilling well liquid chamber of 1cm, and the drilling well liquid chamber is connected with the rock core central circular hole, and it is the pipeline of 3mm that there is internal diameter in the first plug central authorities, as the circulation canal of drilling fluid.The first plug end of the first plug is equipped with touch force sensor, and in order to measure the swelling stress of rock core, the signal of touch force sensor is drawn by the wire in the right rock core plug.

The other end of core chamber is the second plug, and there is a drilling well liquid chamber the second plug end and the core chamber intersection of the second plug, and the drilling well liquid chamber is connected with the rock core central circular hole.The opposite side of the second plug is equipped with U-shaped the 3rd plug, and the 3rd plug is the inboard that is installed in the second plug fixed part by screw thread.The outside of the second plug fixed part is threaded connection in thread barrel.The second plug, the 3rd plug and thread barrel surround to get the axial compression chamber.Connecting diameter between the second plug and the 3rd plug is the telescopic circulation of drilling fluid pipeline of helical form of 3mm.The axial compression chamber is connected to the axial compression fluid line by the opening pipeline in the 3rd plug.

The periphery of core chamber, the second plug end and the first plug end is rubber bush, has three to wear joint on the rubber bush, and wears the pore pressure measurement line that joint is connected and is connected to the outer pressure sensor of clamper by right rock core plug.The first plug and screw shell outside are the pressure-bearing cylinders of clamper, and the cavity between pressure-bearing cylinder and the rubber bush is the confined pressure chamber.The confined pressure chamber is connected to the confined pressure fluid line by the connector on the pressure-bearing cylinder.

Described evaluation system also comprises;

Constant-flux pump, it is connected in the second drilling well liquid chamber by the circulation of drilling fluid pipeline;

Slurry tank, it is connected to described constant-flux pump and the first drilling well liquid chamber.

Pressure controller, it is connected to slurry tank and the first drilling well liquid chamber through the circulation of drilling fluid pipeline;

Pressure sensor, it is connected to constant-flux pump and the second drilling well liquid chamber through the circulation of drilling fluid pipeline.

Radiographic source and ray dash receiver; Described radiographic source and ray dash receiver are arranged at respectively the both sides of described pressure-bearing cylinder outside.

The pit shaft rock pressure environment of the utility model under can simulation stratum condition applies confined pressure, axial compression and wellbore pressure simultaneously.Can measure drilling fluid fluid pressure transmission during seepage flow in rock of borehole, the swelling stress of rock matrix can analyze that rock core micro crack hole changes and the formation state of mud cake.

Description of drawings

Accompanying drawing 1 is drilling fluid rock interaction Simulation evaluation system drawing.

Accompanying drawing 2 is drilling fluid rock interaction Simulation evaluation system flow chart.

Reference numeral: 1-core chamber, 2-rubber bush, 3-touch force sensor, 4-plain conductor, 5-the first plug, 6-circulation of drilling fluid pipeline, 7-the first drilling well liquid chamber, 8-pressure-bearing cylinder, 9-the second plug, 10-thread barrel, 11-confined pressure pipeline, 12-axial compression pipeline, 13-the 3rd plug, 14-axial compression chamber, 15-circulation of drilling fluid pipeline, 16-the second drilling well liquid chamber, 17-wear joint, 18-confined pressure chamber, 19-pore pressure measurement line, 20-pressure sensor, the 21-constant-flux pump, the 22-slurry tank, 23-radiographic source, 24-pressure controller, 25-ray dash receiver, the 26-pressure sensor.

The specific embodiment

The present invention is described in detail below in conjunction with embodiment, but the present invention is not limited to following examples.

A kind of drilling fluid rock interaction Simulation evaluation system that the utility model provides comprises, comprises

Core chamber 1, it is used for placing rock core, in order to simulation well Zhou Yanshi;

The first plug 5, it is divided into the first plug end and the first plug fixed part; The intersection of one end of described the first plug end and core chamber 1 is the first drilling well liquid chamber 7, described the first drilling well liquid chamber 7 is connected with the rock core central circular hole of core chamber 1, described the first drilling well liquid chamber 7 with by passing circulation of drilling fluid pipeline 6 UNICOMs of the first plug end;

The second plug 9, it is divided into the second plug end and the second plug fixed part; There is the second drilling well liquid chamber 16 intersection of described the second plug end and core chamber's 1 other end, and described the second drilling well liquid chamber 16 is connected with the rock core central circular hole of core chamber 1;

Axial compression chamber 14, it is the cavity of U-shaped the 3rd plug 13 centres of the second plug 9 and the other end that is arranged on the second plug 9; Be provided with the telescopic circulation of drilling fluid pipeline 15 of helical form in the axial compression chamber 14, described circulating line 15 1 ends are communicated with the outside in described axial compression chamber 14, and the other end is communicated with the first drilling well liquid chamber 7; Axial compression chamber 14 links to each other 12 with axial compression pipeline in being arranged on the 3rd plug 13;

Described core chamber 1, the first plug 5, the second plug 9, the 3rd plug 13 and axial compression chamber 14 all are arranged in the pressure-bearing cylinder 8, and described the first plug fixed part and the second plug fixed part are fixed in pressure-bearing cylinder 8 by screw shell 10.

The outside of described the first plug end, the second plug end and core chamber 1 is provided with rubber bush 2, the first plug ends and is provided with sensor 3.

The diameter of described rubber bush is less than pressure-bearing cylinder 8, so that form confined pressure chamber 18 between rubber bush 2 and the first plug fixed part and the second plug fixed part and the pressure-bearing cylinder 8.

Described confined pressure chamber 18 is by being connected with confined pressure pipeline 11 at connector disposed thereon.

The plug end of described the first plug 5 is provided with sensor 3.

Described rubber bush 2 is provided with a plurality of joints that wear, and the described joint that wears is connected by the sensor 20 of wire with described evaluation system outside.

Described evaluation system also comprises;

Constant-flux pump 21, it is connected in the second drilling well liquid chamber 16 by the circulation of drilling fluid pipeline;

Slurry tank 22, it is connected to described constant-flux pump 21 and the first drilling well liquid chamber 7.

More preferably,

Described evaluation system also comprises:

Pressure controller 24, it is connected to slurry tank 22 and the first drilling well liquid chamber 7 through the circulation of drilling fluid pipeline;

Pressure sensor 26, it is connected to constant-flux pump 21 and the second drilling well liquid chamber 16 through the circulation of drilling fluid pipeline.

Described evaluation system also comprises: radiographic source 23 and ray dash receiver 25; Described radiographic source 23 and ray dash receiver 25 are arranged at respectively the both sides of described pressure-bearing cylinder 8 outsides.

Embodiment

Core chamber's 1 diameter is 5cm in the utility model, and coring is the cylindric of central zone circular hole, and external diameter 5cm is in order to simulation well Zhou Yanshi; Rock core central authorities are drilled with the circular hole that internal diameter is 1cm, the well of simulation diameter 1cm.The circular hole intersection of the first plug end of the first plug 4 and the rock core of core chamber 1 is that internal diameter is the first drilling well liquid chamber 7 of 1cm, the first drilling well liquid chamber 7 is connected with the rock core central circular hole, it is the pipeline of 3mm that there is internal diameter in the first plug 4 central authorities, as the circulation canal of drilling fluid.The first plug end of the first plug 4 is equipped with touch force sensor 2, and in order to measure the swelling stress of rock core, the signal of touch force sensor 2 is drawn by the wire in the right rock core plug.

The other end of core chamber 1 is that the second plug end and core chamber 1 intersection of the second plug 9, the second plugs 9 has a drilling well liquid chamber, and the drilling well liquid chamber is connected with the rock core central circular hole.It is the inboards that are installed in the second plug fixed part by screw thread that the opposite side of the second plug 9 is equipped with U-shaped the 3rd plug 13, the three plugs.The outside of the second plug fixed part is threaded connection in thread barrel 10.The second plug 9, the 3rd plug 13 and thread barrel 10 surround to get axial compression chamber 14.Connecting diameter between the second plug 9 and the 3rd plug 13 is the telescopic circulation of drilling fluid pipeline 15 of helical form of 3mm.Axial compression chamber 14 is connected to axial compression fluid line 12 by the opening pipeline in the 3rd plug 13.

The periphery of core chamber 1, the second plug 9 ends and the first plug 4 ends is rubber bushs 1, has three to wear joint 17 on the rubber bush 1, and wears the pore pressure measurement line that joint 17 is connected and is connected to outside pressure sensor 20 by the first plug 4.The first plug 4 and screw shell 10 outsides are pressure-bearing cylinders 8, and the cavity between pressure-bearing cylinder 8 and the rubber bush 1 is confined pressure chamber 18.Confined pressure chamber 18 is connected to confined pressure fluid line 11 by the connector on the pressure-bearing cylinder 8.

Constant-flux pump 21, it is connected in the second drilling well liquid chamber 16 by the circulation of drilling fluid pipeline;

Slurry tank 22, it is connected to described constant-flux pump 21 and the first drilling well liquid chamber 7.

Pressure controller 24, it is connected to slurry tank 22 and the first drilling well liquid chamber 7 through the circulation of drilling fluid pipeline;

Pressure sensor 26, it is connected to constant-flux pump 21 and the second drilling well liquid chamber 16 through the circulation of drilling fluid pipeline.

Radiographic source 23 and ray dash receiver 25; Described radiographic source 23 and ray dash receiver 25 are arranged at respectively the both sides of described pressure-bearing cylinder 8 outsides.

Using method of the present utility model is:

Give confined pressure chamber 18 injection liquid force feeds through confined pressure fluid line 11, make core chamber's 1 suffered confined pressure reach predetermined value; Suppress for immediately axial compression chamber 14, so that core chamber's 1 suffered axial compression reaches predetermined value; Grant the drilling fluid displacement pressure through circulation of drilling fluid pipeline 15, drilling fluid is flowed out through pipeline 6, set up circulation of drilling fluid, the average fluid pressure in the rock core circular hole is the size of down-hole wellbore pressure.Wear joint 17 by three on the rubber bush and connect hole pressure measuring tube line 19 and the outer Three pressures sensor 20 of pressure-bearing cylinder, the pore pressure that obtains core chamber's 1 outer radius by pressure sensor 20 changes, and machine gathers modeling analysis and obtains the seepage flow characteristics of drilling fluid in rock of borehole as calculated.

Measure rock cores by touch inductor 3 and touch the subsidiary stress that contingent aquation causes behind the drilling fluid, and the variation of force value is converted to electric current, be connected to computer through plain conductor 4 and carry out data collection and analysis.

Axial rotation by described evaluation system, the radiographic source 23 of three-D CT scanning imager can carry out radiation exposure to core chamber 1 from different perspectives, and by ray dash receiver 25 reception ray energies, machine carries out three-dimensional reconstruction as calculated, analyzes rock core crack, down-hole and mud cake form with the Changing Pattern under the materialization coupling.

Claims (10)

1. a drilling fluid rock interaction Simulation evaluation system is characterized in that, described evaluation system comprises:
Core chamber, it is used for placing rock core, in order to simulation well Zhou Yanshi;
The first plug, it is divided into the first plug end and the first plug fixed part; The intersection of one end of described the first plug end and core chamber is the first drilling well liquid chamber, and described the first drilling well liquid chamber is connected with the rock core central circular hole, described the first drilling well liquid chamber with by passing the circulation of drilling fluid pipeline UNICOM of the first plug end;
The second plug, it is divided into the second plug end and the second plug fixed part; There is the second drilling well liquid chamber the intersection of described the second plug end and core chamber's other end, and described the second drilling well liquid chamber is connected with the rock core central circular hole;
The axial compression chamber, it is the middle cavity of U-shaped the 3rd plug of the second plug and the second plug fixed part that is arranged on the second plug; Be provided with the telescopic circulation of drilling fluid pipeline of helical form in the axial compression chamber, described circulating line one end is communicated with the outside of described evaluation system, and the other end is communicated with the first drilling well liquid chamber; The axial compression chamber links to each other with axial compression fluid line in being arranged on the 3rd plug;
Described core chamber, the first plug, the second plug, the 3rd plug and axial compression chamber all are arranged in the pressure-bearing cylinder.
2. evaluation system according to claim 1 is characterized in that, described the first plug fixed part and the second plug fixed part are fixed in the pressure-bearing cylinder by screw shell.
3. evaluation system according to claim 2 is characterized in that, the outside of described the first plug end, the second plug end and core chamber is provided with rubber bush, and the first plug end is provided with sensor.
4. evaluation system according to claim 3 is characterized in that, the diameter of described rubber bush is less than the pressure-bearing cylinder, and rubber bush is provided with a plurality of joints that wear, and the described joint that wears is connected by the sensor of wire with pressure-bearing cylinder outside.
5. evaluation system according to claim 4, it is characterized in that, described evaluation system also comprises the confined pressure chamber, it is formed by the space between rubber bush and the first plug fixed part and the second plug fixed part and the pressure-bearing cylinder, and it is by being connected with the confined pressure fluid line at connector disposed thereon.
6. each described evaluation system is characterized in that according to claim 1-3, and described the first plug end is provided with sensor.
7. evaluation system according to claim 3 is characterized in that, described rubber bush is provided with a plurality of joints that wear, and the described joint that wears is connected by the sensor of wire with described evaluation system outside.
8. each described evaluation system is characterized in that according to claim 1-3, and described evaluation system also comprises:
Constant-flux pump, it is connected in the second drilling well liquid chamber by the circulation of drilling fluid pipeline;
Slurry tank, it is connected to described constant-flux pump and the first drilling well liquid chamber.
9. evaluation system according to claim 8 is characterized in that, described evaluation system also comprises:
Pressure controller, it is connected to slurry tank and the first drilling well liquid chamber through the circulation of drilling fluid pipeline;
Pressure sensor, it is connected to constant-flux pump and the second drilling well liquid chamber through the circulation of drilling fluid pipeline.
10. evaluation system according to claim 9 is characterized in that, described evaluation system also comprises: radiographic source and ray dash receiver; Described radiographic source and ray dash receiver are arranged at respectively the both sides of described pressure-bearing cylinder outside.
CN 201220610065 2012-11-16 2012-11-16 Drilling fluid and rock interaction simulating and evaluating system CN203248148U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528927A (en) * 2013-11-05 2014-01-22 西南石油大学 Method and device for measuring well wall mud rock hydration expansion strain
CN104076047A (en) * 2014-07-28 2014-10-01 重庆大学 CT (computed tomography) system for monitoring fluid seepage processes
CN104500048A (en) * 2014-09-28 2015-04-08 中国石油大学(华东) Experimental facility for simulating forming process of mud cake
CN104792596A (en) * 2015-04-24 2015-07-22 西南石油大学 Dynamic mud cake forming device of drilling fluid and experimental method of dynamic mud cake forming device
CN105301192A (en) * 2015-10-29 2016-02-03 西南石油大学 Experimental device and method for simulating single-crack flowback after shale gas fracturing
CN106153516A (en) * 2015-04-20 2016-11-23 中国石油化工股份有限公司 A kind of estimation of stability device for core sample
CN107355201A (en) * 2017-07-28 2017-11-17 中国地质调查局油气资源调查中心 A kind of application method of gas hydrates exploitation analogue experiment installation
CN107514243A (en) * 2017-07-28 2017-12-26 中国地质调查局油气资源调查中心 A kind of gas hydrates develop analogue experiment installation
CN107687336A (en) * 2017-07-28 2018-02-13 中国地质调查局油气资源调查中心 A kind of one-dimensional long tube model system of gas hydrates exploitation analogue experiment installation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528927A (en) * 2013-11-05 2014-01-22 西南石油大学 Method and device for measuring well wall mud rock hydration expansion strain
CN104076047A (en) * 2014-07-28 2014-10-01 重庆大学 CT (computed tomography) system for monitoring fluid seepage processes
CN104500048A (en) * 2014-09-28 2015-04-08 中国石油大学(华东) Experimental facility for simulating forming process of mud cake
CN106153516B (en) * 2015-04-20 2020-02-21 中国石油化工股份有限公司 Stability evaluation device for rock core sample
CN106153516A (en) * 2015-04-20 2016-11-23 中国石油化工股份有限公司 A kind of estimation of stability device for core sample
CN104792596A (en) * 2015-04-24 2015-07-22 西南石油大学 Dynamic mud cake forming device of drilling fluid and experimental method of dynamic mud cake forming device
CN105301192B (en) * 2015-10-29 2017-05-10 西南石油大学 Experimental device and method for simulating single-crack flowback after shale gas fracturing
CN105301192A (en) * 2015-10-29 2016-02-03 西南石油大学 Experimental device and method for simulating single-crack flowback after shale gas fracturing
CN107355201A (en) * 2017-07-28 2017-11-17 中国地质调查局油气资源调查中心 A kind of application method of gas hydrates exploitation analogue experiment installation
CN107514243A (en) * 2017-07-28 2017-12-26 中国地质调查局油气资源调查中心 A kind of gas hydrates develop analogue experiment installation
CN107687336A (en) * 2017-07-28 2018-02-13 中国地质调查局油气资源调查中心 A kind of one-dimensional long tube model system of gas hydrates exploitation analogue experiment installation

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