CN103712863B - Based on the device and method of Study on Catastrophe Theory pressure break Rock Damage and crack propagation - Google Patents

Based on the device and method of Study on Catastrophe Theory pressure break Rock Damage and crack propagation Download PDF

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Publication number
CN103712863B
CN103712863B CN201410006040.7A CN201410006040A CN103712863B CN 103712863 B CN103712863 B CN 103712863B CN 201410006040 A CN201410006040 A CN 201410006040A CN 103712863 B CN103712863 B CN 103712863B
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pressure
pressure break
longitudinal
crack propagation
rock
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CN201410006040.7A
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CN103712863A (en
Inventor
王婷婷
赵万春
付晓飞
李玉伟
王梅
孙永河
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东北石油大学
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Abstract

What the present invention relates to is device and method based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation, the fixed dam of this device and method based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation is square, longitudinal pressure clamper, horizontal load hydraulic gripper and fixed dam surround test specimen chamber jointly, longitudinal pressure clamper is positioned at longitudinal pressure hydraulic cavities simultaneously, and horizontal load hydraulic gripper is positioned at horizontal load hydraulic cavities simultaneously; Water injection pipe is connected with injection pump by pipeline, and pressure break pit shaft extend in test specimen chamber, and pressure break pit shaft is connected with heating arrangement, fracturing liquid supercharge pump by pipeline; Fixed dam is provided with strain transducer and acoustic emission signal receiver, horizontal load hydraulic gripper is installed acoustic emission signal receiver, and the thermoinduction detector of induction detection system is installed in the outside of the vertical edges of fixed dam; Longitudinal loading pressure charging system is connected to longitudinal pressure hydraulic cavities, and transverse load pressure charging system is connected to horizontal load hydraulic cavities.Present invention achieves the visual description of pressure break Rockmass fractures in the crack propagation of rock mass inside, give to describe clearly in rock mass internal extended rule to Rockmass fractures.

Description

Based on the device and method of Study on Catastrophe Theory pressure break Rock Damage and crack propagation

One, technical field:

What the present invention relates to is the research method that the expansion of the rock mass fracturing fracture such as oil and gas, unconventionaloil pool reservoir, Geotechnical Engineering calculates, and what be specifically related to is device and method based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation.

Two, background technology:

Exploit with unconventional gas reservoir and in the technical field such as well stimulation, waterfrac treatment is the technical method be most widely used at present oil and gas, shale gas and coal-seam gas etc. are conventional.At present, rock mass pressure break is mainly conducted a research based on the macroscopic description in the crack of rock mass pressure break and the pressure break computation model of routine, most research often will be observed its fracture morphology by the unloading of pressure rock mass, fail to describe clearly to the expansion intension of internal fissure and form.Therefore, the internal feature in crack cannot be described exactly.

In actual fracturing fracture expansion process, due to the complicacy of crack propagation and by the complicacy of pressure break rock mass mechanics feature, the parameters such as crack propagation length, extension width describe not accurate enough, make also there is a lot of technical matters and safety problem cannot solve in exploitation, and then have impact on oil and gas production and the rate of oil and gas recovery of fracturing process.At present, for the description of rock mass reservoir hydrfracturing fracture morphology, mainly contain the PKN of two dimension or three-dimensional, the computing method such as KGD, the method mainly supposes that in the hydraulic fracturing process expansion in crack is continuous doing work with fracturing pump and the crack continuation expansion that produces, and crack propagation form is for mainly to carry out parameter calculating with the model such as square crack, oval crack.And learnt by actual pressure break: the accumulation of energy before rock mass waterfrac treatment main manifestations to be crack be cracking and the energy of crack occurrence discharge suddenly, have typical Characteristics of Mutation.The research of fracture propagation behavior in the past and fracture parameters describe, and also there is certain difference with actual fracturing fracture propagation behavior.Although current existing numerical simulation software can meet the needs of current understanding to a certain extent, the announcement of system cannot be given, thus have impact on the abundant description of this technical elements.

Three, summary of the invention:

The object of this invention is to provide the device and method based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation, it cannot the problem of accurate description for solving existing waterfrac treatment Rockmass fractures spreading parameter.

The technical solution adopted for the present invention to solve the technical problems is: this device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation comprises fixed dam, longitudinal pressure clamper, horizontal load hydraulic gripper, induction detection system, deformation detection system, fault offset receiving system, fixed dam is square, longitudinal pressure clamper, horizontal load hydraulic gripper surrounds test specimen chamber jointly from vertical and horizontal direction and fixed dam respectively, longitudinal pressure clamper is positioned at longitudinal pressure hydraulic cavities simultaneously, horizontal load hydraulic gripper is positioned at horizontal load hydraulic cavities simultaneously, water injection pipe extend in test specimen chamber, and water injection pipe is connected with injection pump by pipeline, pressure break pit shaft extend in test specimen chamber, and pressure break pit shaft is connected with heating arrangement, fracturing liquid supercharge pump by pipeline, and tracer agent mixing device is connected on the pipeline between pressure break pit shaft and heating arrangement, the inwall of the vertical edges of fixed dam is provided with the strain transducer of deformation detection system and the acoustic emission signal receiver of fault offset receiving system, the inwall of horizontal load hydraulic gripper is installed the acoustic emission signal receiver of fault offset receiving system, the thermoinduction detector of induction detection system is installed in the outside of the vertical edges of fixed dam, longitudinal loading pressure charging system is connected to longitudinal pressure hydraulic cavities, and transverse load pressure charging system is connected to horizontal load hydraulic cavities.

Respond to detection system in such scheme to be formed by connecting by pipeline by thermoinduction detector, hotness dynamic detection system, hotness imager.

In such scheme, deformation detection system is formed by connecting by pipeline by strain transducer, distortion sensing disposal system.

In such scheme, fault offset receiving system is formed by connecting by acoustic emission signal receiver, acoustic emission signal converter, acoustic emission disposal system, and acoustic emission disposal system is installed in a computer.

In such scheme, longitudinal loading pressure charging system is connected and composed by pipeline by longitudinal pressurized container, longitudinal supercharge pump, manograph.

In such scheme, transverse load pressure charging system is connected and composed by pipeline by transverse load pressurized container, horizontal supercharge pump, manograph.

Frac system in such scheme is made up of fracturing liquid supercharge pump, heating arrangement, tracer agent mixing device, fracturing liquid pipeline, pressure break pit shaft.

The above-mentioned device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation is for studying the method for pressure break Rock Damage and crack propagation:

The first step: make rock core test piece, maintenance, polishing are carried out to rock core test piece, specifies according to instrument the sample dimensions being made into standard, be placed in test specimen chamber;

Second step: outer carrying is applied to rock core test piece by longitudinal loading pressure charging system and transverse load pressure charging system, in ascending pipe alignment rock core test piece, the good liquid of configured in advance is injected by injection pump, by frac system, pressure break is implemented to rock core test piece, the pump pressure that record pressure break applies and applying pump pressure time, when Pump pressure of fracturing declines suddenly, stop frac system, record pump pressure and the time of this state;

3rd step: by deformation detection system log (SYSLOG) rock core test piece by the deformation behaviour of fracturing process; By fault offset receiving system record rock core test piece by the energy variation of fracturing process;

4th step: according to conservation of energy principle, assuming that injection pump is all converted to the energy of Rockmass fractures expansion to the external work that rock mass does, obtaining rock mass master pattern when breaking of undergoing mutation is:

Obtaining a kind of crack propagation length computation model based on catastrophe theory newly by master pattern is:

5th step: by induction detection system record rock core test piece by the rupture process of pressure break;

6th step: repeat above-mentioned 2-5 and walk, and by logging.

Beneficial effect:

1, present invention achieves the visual description of pressure break Rockmass fractures in the crack propagation of rock mass inside, give to describe clearly in rock mass internal extended rule to Rockmass fractures.

2, the present invention more intuitively describes the crack initiation behavior in crack, gives well to supplement to the macroscopic description of current pressure break Rockmass fractures.

3, the present invention is based on the propagation law that energy theory discloses crack, give more reasonably describing method and description means to the behavior forming crack of breaking suddenly of pressure break rock mass.

Four, accompanying drawing illustrates:

Fig. 1 is the structural representation of apparatus of the present invention.

1-fixed dam; 2-water injection pipe; 3-longitudinal pressure hydraulic cavities; 4-gearing; 5-longitudinal pressure clamper; 6-pressure break pit shaft; 7-fracturing liquid pipeline; 8-inject pipeline; 9-injection pump; 10-tracer agent mixing device; 11-heating arrangement; 12-fracturing liquid supercharge pump; 13-manograph; 14-transverse load pressurized container; 15-transverse load supercharge pump; 17-horizontal load hydraulic cavities; 18-horizontal load hydraulic gripper; 19-strain transducer; 20-thermoinduction detector; 21-distortion sensing disposal system; 22-pressure break perforation pipe; 23-test specimen chamber; 24-hotness imager; 25-hotness dynamic detection system; 26-manograph; 27-longitudinal pressurized container; 28-longitudinal supercharge pump; 30-acoustic emission signal receiver; 31-acoustic emission signal converter; 32-acoustic emission disposal system.

Five, embodiment:

Below in conjunction with accompanying drawing, the present invention is described further:

As shown in Figure 1, this device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation comprises fixed dam 1, longitudinal pressure clamper 5, horizontal load hydraulic gripper 18, induction detection system, deformation detection system, fault offset receiving system, fixed dam 1 is square, longitudinal pressure clamper 5, horizontal load hydraulic gripper 18 surrounds test specimen chamber 23 jointly from vertical and horizontal direction and fixed dam 1 respectively, when testing, rock core test piece is placed in test specimen chamber 23, longitudinal pressure clamper 5 is positioned at longitudinal pressure hydraulic cavities 3 simultaneously, longitudinal pressure clamper 5 connection for transmission device 4, horizontal load hydraulic gripper 18 is positioned at horizontal load hydraulic cavities 17 simultaneously, horizontal load hydraulic gripper 18 connects other gearing, water injection pipe 2 extend in test specimen chamber 23, and water injection pipe 2 is connected with injection pump 9 by pipeline, pressure break pit shaft 6 extend in test specimen chamber 23, pressure break pit shaft 6 is connected with heating arrangement 11, fracturing liquid supercharge pump 12 by pipeline, tracer agent mixing device 10 is connected on the pipeline between pressure break pit shaft 6 and heating arrangement 11, and pressure break perforation pipe 22 is arranged at the bottom of pressure break pit shaft 6, the inwall of the vertical edges of fixed dam 1 is provided with the strain transducer 19 of deformation detection system and the acoustic emission signal receiver 30 of fault offset receiving system, the inwall of horizontal load hydraulic gripper 18 is also installed the acoustic emission signal receiver 30 of fault offset receiving system, the thermoinduction detector 20 of induction detection system is installed in the outside of the vertical edges of fixed dam 1.

Longitudinal loading pressure charging system is connected to longitudinal pressure hydraulic cavities 3, and longitudinal loading pressure charging system is connected and composed by pipeline by longitudinal pressurized container 27, longitudinal supercharge pump 28, manograph 26.Transverse load pressure charging system is connected to horizontal load hydraulic cavities 17, and transverse load pressure charging system is connected and composed by pipeline by transverse load pressurized container 14, transverse load supercharge pump 15, manograph 13.

Induction detection system is formed by connecting by pipeline by thermoinduction detector 20, hotness dynamic detection system 25, hotness imager 24.Thermoinduction detector 20 is placed in the outward flange of rock core test piece, and carry out induction detection to the crack propagation that rock core test piece damage and failure produces, result of detection, through hotness imager 24 imaging display, describes the expanded configuration in crack.

Deformation detection system is formed by connecting by pipeline by strain transducer 19, distortion sensing disposal system 21.Strain transducer 19 is placed in the outward flange of rock core test piece, the deformation of record rock core test piece.

Fault offset receiving system is formed by connecting by acoustic emission signal receiver 30, acoustic emission signal converter 31, acoustic emission disposal system 32, and acoustic emission disposal system is installed in a computer.Acoustic emission signal receiver 30 is connected with rock core test piece, and the energy discharged after rock core test piece pressure break is with the transmission of elastic wave form, and the signal of signal receiver 30 is carried out signal conversion by acoustic emission signal converter, and transfers to acoustic emission disposal system 32.

Fracturing liquid can be gas and liquid fracturing fluid, and tracer agent can be liquid tracer and colored gas tracer agent.

Rock core test piece is mainly connected with longitudinal loading pressure charging system with transverse load pressure charging system respectively.Have injection pump 9 to inject fluid through injecting pipeline 8 in test specimen, imitation specimen injection pressure changes.Rock mass fracturing liquid pumps through fracturing liquid supercharge pump 12, heats through heating arrangement 11, and tracer agent mixing device 10 is pumped in pressure break pit shaft 6 by tracer agent blending fracturing liquid through fracturing liquid pipeline 7 high pressure, implements pressure break to rock core test piece.

The above-mentioned device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation is for studying the method for pressure break Rock Damage and crack propagation:

The first step: make rock core test piece (rock core test piece), maintenance, polishing are carried out to rock core test piece, specifies according to instrument the sample dimensions being made into standard, be placed in test specimen chamber 23;

Second step: outer carrying is applied to rock core test piece by longitudinal loading pressure charging system and transverse load pressure charging system, in ascending pipe alignment rock core test piece, the good liquid of configured in advance is injected by injection pump, by frac system, pressure break is implemented to rock core test piece, the pump pressure that record pressure break applies and applying pump pressure time, when Pump pressure of fracturing declines suddenly, stop frac system, record pump pressure and the time of this state;

3rd step: by deformation detection system log (SYSLOG) rock core test piece by the deformation behaviour of fracturing process; By fault offset receiving system record rock core test piece by the energy variation of fracturing process;

4th step: according to conservation of energy principle, assuming that injection pump is all converted to the energy of Rockmass fractures expansion to the external work that rock mass does, obtaining rock mass master pattern when breaking of undergoing mutation is:

Obtaining a kind of crack propagation length computation model based on catastrophe theory newly by master pattern is:

5th step: by the rock core test piece in induction detection system record test specimen chamber by the rupture process of pressure break;

6th step: repeat above-mentioned 2-5 and walk, and by logging.

Claims (6)

1. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation, it is characterized in that: this device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation comprises fixed dam (1), longitudinal pressure clamper (5), horizontal load hydraulic gripper (18), induction detection system, deformation detection system, fault offset receiving system, fixed dam (1) is square, longitudinal pressure clamper (5), horizontal load hydraulic gripper (18) surrounds test specimen chamber (23) jointly from vertical and horizontal direction and fixed dam (1) respectively, longitudinal pressure clamper (5) is positioned at longitudinal pressure hydraulic cavities (3) simultaneously, horizontal load hydraulic gripper (18) is positioned at horizontal load hydraulic cavities (17) simultaneously, water injection pipe (2) extend in test specimen chamber (23), and water injection pipe (2) is connected with injection pump (9) by pipeline, pressure break pit shaft (6) extend in test specimen chamber (23), pressure break pit shaft (6) is connected with heating arrangement (11), fracturing liquid supercharge pump (12) by pipeline, and tracer agent mixing device (10) is connected on the pipeline between pressure break pit shaft (6) and heating arrangement (11), the inwall of the vertical edges of fixed dam (1) is provided with the strain transducer (19) of deformation detection system and the acoustic emission signal receiver (30) of fault offset receiving system, the inwall of horizontal load hydraulic gripper (18) is installed the acoustic emission signal receiver (30) of fault offset receiving system, the thermoinduction detector (20) of induction detection system is installed in the outside of the vertical edges of fixed dam (1), longitudinal loading pressure charging system is connected to longitudinal pressure hydraulic cavities (3), and transverse load pressure charging system is connected to horizontal load hydraulic cavities (17),
The described device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation is for studying the method for pressure break Rock Damage and crack propagation:
The first step: make rock core test piece, maintenance, polishing are carried out to rock core test piece, specifies according to instrument the sample dimensions being made into standard, be placed in test specimen chamber;
Second step: outer carrying is applied to the rock core test piece in test specimen chamber (23) by longitudinal loading pressure charging system and transverse load pressure charging system, the good liquid of configured in advance is injected by the rock core test piece of injection pump (9) through injecting pipeline (8) to test specimen chamber (23), by frac system, pressure break is implemented to the rock core test piece in test specimen chamber (23), the pump pressure that record pressure break applies and applying pump pressure time, when Pump pressure of fracturing declines suddenly, stop frac system, record pump pressure and the time of this state;
3rd step: by the rock core test piece in deformation detection system log (SYSLOG) test specimen chamber (23) by the deformation behaviour of fracturing process; By the rock core test piece in fault offset receiving system record test specimen chamber (23) by the energy variation of fracturing process;
4th step: according to conservation of energy principle, assuming that injection pump is all converted to the energy of Rockmass fractures expansion to the external work that rock mass does, obtaining rock mass master pattern when breaking of undergoing mutation is:
Obtaining a kind of crack propagation length computation model based on catastrophe theory newly by master pattern is:
5th step: by the rock core test piece in induction detection system record test specimen chamber (23) by the rupture process of pressure break;
6th step: repeat above-mentioned 2-5 and walk, and by logging.
2. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation according to claim 1, is characterized in that: described induction detection system is formed by connecting by pipeline by thermoinduction detector (20), hotness dynamic detection system (25), hotness imager (24).
3. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation according to claim 1, is characterized in that: described deformation detection system is formed by connecting by pipeline by strain transducer (19), distortion sensing disposal system (21).
4. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation according to claim 1, it is characterized in that: described fault offset receiving system is formed by connecting by acoustic emission signal receiver (30), acoustic emission signal converter (31), acoustic emission disposal system (32), acoustic emission disposal system (32) is installed in a computer.
5. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation according to claim 1, is characterized in that: described longitudinal loading pressure charging system is connected and composed by pipeline by longitudinal pressurized container (27), longitudinal supercharge pump (28), manograph (26).
6. the device based on Study on Catastrophe Theory pressure break Rock Damage and crack propagation according to claim 1, is characterized in that: described transverse load pressure charging system is connected and composed by pipeline by transverse load pressurized container (14), horizontal supercharge pump (15), manograph (13).
CN201410006040.7A 2014-01-07 2014-01-07 Based on the device and method of Study on Catastrophe Theory pressure break Rock Damage and crack propagation CN103712863B (en)

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