CN105201483A - Environment-friendly downhole stratum fracturing method - Google Patents
Environment-friendly downhole stratum fracturing method Download PDFInfo
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- CN105201483A CN105201483A CN201510606442.5A CN201510606442A CN105201483A CN 105201483 A CN105201483 A CN 105201483A CN 201510606442 A CN201510606442 A CN 201510606442A CN 105201483 A CN105201483 A CN 105201483A
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Abstract
The invention discloses an environment-friendly downhole stratum fracturing method, and belongs to the technical field of anti-reflection fracturing of horizontal wells, inclined shafts, vertical wells and the like. The method is achieved through an environment-friendly downhole stratum fracturing device. The environment-friendly downhole stratum fracturing device structurally comprises a well mouth plugging device, a downhole dragging device, well inside packers, a high-pressure hose, a well inside armor cable, a high-strength cable, an operating and control mechanism and a sensor assembly. Through the operating and control mechanism of the device, the downhole dragging device drags the two well inside packers to a set layer position, a set downhole stratum fracturing space is formed, the high-pressure hose is controlled to inject separation liquid, liquid powder, primary powder and the like into a to-be-fractured downhole space according to a formula proportion, the well inside cable is further controlled to carry out electronic ignition, high-energy and high-pressure gas stratum fracturing work is carried out, and multi-repeating or non-repeating stratum fracturing work of different stratum spaces and different stratum conditions is achieved. According to the method, the efficient, economical and environment-friendly stratum fracturing method and device are provided for coalbed methane/shale gas extraction, the fracturing effect is good, a large-range crack system is formed, the permeability of a reservoir stratum is improved, the desorption speed of the reservoir stratum is increased, and the aim of increasing production is achieved. The method and device are worthy of adoption and popularization.
Description
Technical field
Environment-friendly type underground fracture ground method disclosed by the invention belongs to the anti-reflection fracturing technique fields such as horizontal well, inclined shaft, peupendicular hole, and what technical scheme of the present invention was specifically related to is a kind of environment-friendly type, repeatedly repeats or/and composite fracturing stratum, the down-hole new method of non-duplicate use.
Background technology
Coal bed gas, shale gas etc. all belong to Unconventional forage, be nearly one, Two decades years newly emerge in the world cleaning, high-grade energy and industrial chemicals, Commercial Prospect is huge.At present, China's coal bed gas resource total amount occupies third place in the world, and shale gas recoverable reserves occupies first place in the world, and is the emerging energy industry that China gives priority to.But affect by tectonic movement, China's coalbed methane reservoir has the features such as low-permeability, low-pressure, low gas content saturation ratio, stronger non-homogeneity usually; Shale gas reservoir then has the features such as low pore pressure, low-porosity, low-permeability and high argillaceous.It is huge that these features directly results in coal bed gas/shale gas development difficulty.In addition, adsorbed state is coal bed gas main existing forms in reservoir, is shale gas one of main existing forms in reservoir; Coal bed gas/shale gas desorption rate also has a strong impact on its gas recovery velocity.Therefore, how to improve permeability and the desorption rate of low-permeability reservoir, and then improve the recovery ratio of coal bed gas/shale gas, being one of main difficulty of facing of China's coal bed gas/shale gas exploitation, is also one of key subjects of coal mine gas hazard management.
For solving an above-mentioned difficult problem, various fracturing process constantly proposes, and the larger fracturing process of impact has fracturing, high enegry gas fracturing, multistage pulses pressure break, C0 at present
2/ N
2foam fracturing etc.But the many theoretical point views in said method over-borrowing mirror oil and gas exploitation instruct coal bed gas/shale gas exploitation, its actual fracturing effect affects widely different by geological conditions, and pressure break facility and work progress complexity, pressure break material consumption is large, cost is high, poor controllability, there is certain potential safety hazard, more or less formation causes the damage and pollution that cannot recover simultaneously.Wherein, fracturing causes water sensitivity to pollute to reservoir, and the bearing of trend in crack controls by geostatic stress, be difficult to formation multiple cracking system, has the advantages that cost is high, damage reservoir; In addition, this technology also needs special large-scale special equipment and vehicle, and large-area construction plant and a large amount of water sources, and easily forms the water that cannot recover on some stratum and lock.It is slightly little then to there is pressure break scale in high enegry gas fracturing and multistage pulses fracturing technique, and fracture length is short, cannot add the problems such as heap sand.And C0
2/ N
2foam Fracturing Technique is many containing thickening agents such as melon glue, can be adsorbed on reservoir surface blocking seepage channel; And during pressure break coal seam reservoirs, because its buried depth is relatively shallow, reservoir temperature is lower, Chang Buneng is completely broken glue in time, even glue can not be broken, cause full-bodied fracturing fluid in reservoir, take sand advance resistance very large, and the solid concentration breaking the residue after the incomplete breaking glue solution of glue or broken glue is higher, very large to the dark coal seam injury of hyposmosis.
Therefore, need to study and a kind ofly take into full account that the actual fracturing technique of the exploitation such as coal bed gas/shale gas existence, reservoir characteristics, forms of motion instructs coal bed gas/shale gas exploitation.Environment-friendly type underground fracture ground method described in this patent relies on existing achievement in research just, to propose in conjunction with coal bed gas/shale gas exploitation actual features and based on many technology compound thought, overcome the deficiency of above-mentioned multiple fracturing process, solve coal bed gas/shale gas pressure break problem well.
Summary of the invention
The object of the invention is: for coal bed gas/shale gas exploitation provides a kind of high-efficiency environment friendly reliable fracturing process, thus effectively improve permeability and the desorption rate of low-permeability reservoir, reach volume increase object.
Technical scheme of the present invention is such: this environment-friendly type underground fracture ground method is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its equipments overall structure includes: well top stopper, down-hole tugger, packer in well, high-pressure hose, well inner armor cable, high-strength cable, operation controlling organization, sensor cluster, be assembled into device, technical characterstic is: this described environment-friendly type underground fracture ground method after perforating job completes according to perforating effect, by the operation controlling organization of the environment-friendly type underground fracture ground bed device of employing, under control well, tugger draws the underground fracture ground sheaf space that packer to setting layer position in two wells also forms setting, control the formulation weight ratio of high-pressure hose according to setting more respectively by insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO
2treat in pressure break space under Injection Well in two wells between packer, also control well inner armor cable is or/and the igniting of high-strength cable output point ignition voltage, carry out high energy, high pressure gas fracturing stratum operation, control operation like this realize different fracturing stratum space, different fracturing stratum condition, repeatedly repeat or/and the operation of non-duplicate fracturing stratum and process thereof.Described different fracturing stratum spaces refer to that in described well, packer forms the underground fracture ground sheaf space of setting at diverse location; Described different fracturing stratum conditions refer to coal bed gas formation condition or shale gas formation condition.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: the process steps of the method is as follows: a. carries out device and assembles, and namely each several part of composition is assembled apparatus for converting.B. down-hole tugger is adopted the underground part of device to be drawn to default fracturing work layer position, down-hole.C. well top stopper is adopted to close well head, described well top stopper selects public well top stopper, quick plugging device in this way, well top stopper inlet screw interface is connected a Move tool, as being chosen as drilling tool, then well top stopper being fixed on treating in shutoff pit shaft and then shutoff well head by dragging Move tool.D. in employing well, in packer I, well, packer II closes the DH environmental protection type fracturing stratum space forming setting jointly, DH environmental protection type fracturing stratum space between packer I, II in formation well.E. fill insulating liquid by high-pressure hose to the DH environmental protection type fracturing stratum space set, by operation controlling organization regulation and control high-pressure hose valve, injection liquid flow velocity and flow are regulated and controled.F. then inject liquid gun propellant by high-pressure hose, utilize liquid gun propellant pressure itself to extrude insulating liquid, respectively by liquid gun propellant, elementary gunpowder, liquid CO
2treat in fracturing stratum space, until fill successively under Injection Well in two wells between packer I and II.G. well inner armor cable is passed through or/and high-strength cable output point ignition voltage, and lighted a fire by control circuit, ignite liquid gun propellant, and start sensor assembly is monitored temperature and pressure in closed cavity, realizes the clean fracturing stratum operation that this treats in fracturing stratum space.The liquid gun propellant surge pressure of described igniting blasting can reach 10 ~ 200MPa, and maximum temperature can reach 1000 ~ 2000 DEG C, and the fracturing stratum duration reaches 10 ~ 40s, and fracturing effect is good, and energy pressure break many radial fissures, can through connection intrinsic fracture.H. packer II in packer I in well, well is adopted jointly to close to form the DH environmental protection former space of type fracturing stratum or adopt in well packer II in packer I, well jointly to close to be formed the new space of DH environmental protection type fracturing stratum to repeat above-mentioned e, f, g tri-step, to carry out same fracturing stratum space, down-hole or different fracturing stratum space repeatedly fracturing operation and process thereof.The superior function of Here it is environment-friendly type underground fracture ground method of the present invention.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: in the fracturing stratum process described in a., insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in same fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum.This is the transform method of environment-friendly type underground fracture ground method of the present invention.B. in described fracturing stratum process, insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in different fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum.This is again the transform method of environment-friendly type underground fracture ground method of the present invention.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: in well described in a., packer surface structure is capsule-type or squash type, and its inner structure includes: booster pump, strainer, control circuit, igniter and spark plug thereof, sensor cluster and connect they high-pressure hose, well inner armor cable is or/and high-strength cable.Described booster pump is arranged in well in packer, connects strainer, also by the expansion chamber of packer in pump line connecting well by pump line.Described filter bits in packer, by the horizontal well body outside packer in pump line connecting well, connects booster pump by pump line in well.Structure and the connection of described control circuit are as follows: by well inner armor cable, packer internal controller in well is connected to terrestrial operation controlling organization and direct current of ground power supply respectively, described controller comprises power module, controller main body and coding/decoding module.Described power module selects public power module, in this way DC/DC converter, makes the power supply source of the valve in controller main body, coding/decoding module and well in packer, booster pump, igniter, sensor cluster etc.The controller that described controller main body'choice is public, 51 single-chip microcomputers or DSP in this way, controller main body is connected with terrestrial operation controlling organization by coding/decoding module, and controller main body connects and by-pass valve control, booster pump, igniter, sensor cluster.Described igniter and spark plug thereof select public igniter and spark plug thereof, have coil silicon steel sheet formula igniter in this way.Described sensor cluster has pressure sensor, temperature pick up.Public pressure sensor selected by described pressure sensor, in this way HKM-375.Public temperature pick up selected by described temperature pick up, in this way K type thermocouple.B. described well top stopper adopts the structure of prior art, quick plugging device in this way.C. described down-hole tugger adopts the structure of prior art, SONDEX horizontal well downhole tractor in this way, this down-hole tugger by terrestrial operation controlling organization by well inner armor cable or/and high-strength cable sending controling instruction manipulates.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: the structure of the operation controlling organization described in a. includes: the control circuit in computer or microprocessor group and manipulation software thereof, packer and connect their armored cable.Described computer or microprocessor group adopt two-stage or three grades of compositions, and computer or the microprocessor of the described aboveground part of operation controlling organization are host computers, and the computer in operation controlling organization downhole packer or microprocessor are that secondary is or/and three grades of machines.Described host computer computer or microprocessor select public computer or microprocessor, and Intel is to strong E5-2400V2 two-way processor, DELLT7910 work station in this way.B. described well inner armor cable adopts public well logging armored cable, W7BP in this way.Described high-strength cable adopts public high-strength cable, in this way 7-46P/NT-XS.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: component and the formulation weight ratio thereof of the described liquid gun propellant injected in fracturing stratum space are: incendiary agent: oxidant: solvent: sensitizer=5 ~ 12:35 ~ 75:15 ~ 40:10 ~ 45, described incendiary agent is glycerine, diethylene glycol, urea, and described oxidant is NH
4nO
3, NaNO
3, KNO
3, NH
4clO
4, described solvent is water, and described sensitizer is natrium nitrosum.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: the composition of the insulating liquid injected described in a. or component and formulation weight ratio thereof are: CCl
4or CaCl
2: crude oil: water=35 ~ 50:35 ~ 27:30 ~ 23, concrete proportioning must according to liquid gun propellant Auto-regulating System of Density of Heavy Medium.B. described liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 3.0 ~ 4.5:1 with the formulation weight ratio of glycerine, moisture content is 25-35%.C. liquid gun propellant, elementary gunpowder, the liquid CO of described injection
2the dose weight ratio formula of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=5 ~ 10:1:0 ~ 4, described elementary gunpowder is nitrocotton, described liquid CO
2can have or nothing.The liquid gun propellant of described injection, elementary gunpowder, liquid CO
2the relevant information that the dosage of three kinds of materials, speed and ignition and detonation time are detected by downhole sensor by analysis after determined and control to implement.
According to above-described environment-friendly type underground fracture ground method, technical characterstic also has: the main program menu of the computer of described operation controlling organization or the manipulation software of microprocessor group has: pressure break position, pressure break space, gunpowder injection, ignition and detonation, end.Main program menu specifically manipulates: (1) sends instruction through well inner armor cable and high-strength cable to down-hole tugger: packer II in packer I in well and well is dragged to the position needing pressure break; (2) pressure break position sends a series of instruction to packer II in packer I in well and well after determining, includes: in well, in packer I and well, packer II sealed orders forms fracturing stratum space; (3) by operation controlling organization and well inner armor cable or/and high-strength cable transmission according to necessarily required formulation weight ratio, respectively by insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO
2treat in pressure break space under high-pressure hose successively Injection Well in two wells between packer I, II; (4) controller/sensor cluster Monitoring instruction: detect gunpowder and inject situation, igniting blasting instruction, removing seal for packer instruction in packer sealing and well in well; (5) repeatedly fracturing stratum instruction or the repeatedly instruction of refracturing stratum; (6) total fracturing stratum process END instruction.
Environment-friendly type underground fracture ground method advantage of the present invention has: 1. the device assembles easy construction of the fracturing stratum method described in, and stable operation is efficient, and controllability is strong.2. the liquid gun propellant described in is long for burning time, the sustainable effect 10 ~ 40s of detonation gas produced, this liquid gun propellant pressure break concentration of energy, pressure can reach 10 ~ 200MPa, fracturing stratum is effective, the bearing of trend in crack does not control by geostatic stress, can form large-scale Fracture Systems and effectively shake district, greatly can improve stratum permeability.3. the liquid gun propellant charge velocity described in and dosage can be monitored in real time, and operation process is reliable and stable, and formation damage is less, and pollution-free material produces, safety and environmental protection.4. the fracturing work process described in can not damage fracturing unit, need not from underground extraction device direct reuse, operating efficiency is high, can carry out repeatedly refracturing in identical or different pre-pressure break position.5. the main consumable liquid gunpowder of the fracturing stratum method described in, do not need large-area construction plant and a large amount of water sources, cost is low.This environment-friendly type underground fracture ground method is worth adopting and promoting.
Accompanying drawing explanation
Environment-friendly type underground fracture ground method Figure of description of the present invention has 5 width:
Fig. 1 is environment-friendly type underground fracture stratum of the present invention apparatus structure schematic diagram;
Fig. 2 is packer I cut-away structure chart in well;
Fig. 3 is packer II cut-away structure chart in well;
Fig. 4 is the computer of operation controlling organization or the main program menu block diagram of microprocessor group manipulation software;
Fig. 5 is the control circuit figure in well in packer.
Have employed generic reference numeral in the various figures, namely same object uses same label in the various figures.In the various figures: 1. high-pressure hose; 2. well inner armor cable; 3. well top stopper; 4. overlying rock; 5. the borehole wall; 6. pit shaft; 7. packer I in well; 8. preforation tunnel; 9. reservoir; 10. high-strength cable; Packer II in 11. wells; 12. down-hole tuggers; 13. horizontal wells; 14. strainers; 15. pump lines; 16. booster pumps; 17. controllers; 18. igniters; 19. sensor clusters; 20. valves; 21. expansion chamber; 22. start; 23. initialize; In 24. wells, whether packer II is in precalculated position; Whether 25. in front, precalculated position; 26. open down-hole tugger; 27. drag high-strength cable; In 28. wells, whether packer I is in precalculated position; 29. drag well inner armor cable; 30. start booster pump; Whether 31. expansion chamber pressure reach predetermined value; 32. Open valves; 33. inject insulating liquid to high-pressure hose; Whether 34. insulating liquid injection rates reach predetermined value; 35. inject liquid gun propellant to high-pressure hose; Whether 36. liquid gun propellant injection rates reach predetermined value; 37. inject elementary gunpowder to high-pressure hose; Whether 38. elementary gunpowder injection rates reach predetermined value; 39. inject liquid CO to high-pressure hose
2; 40. liquid CO
2whether injection rate reaches predetermined value; 41. valve-offs; 42. start monitoring instrument; 43. initial igniter are ignited; Whether the force value of 44. monitorings is stablized; 45. wait for that force value is stablized; Whether 46. pressure breaks produce a desired effect; Removing seal for packer in 47. wells; Whether pressure break is complete on 48. stratum; 49. terminate; 50. coding/decoding modules; 51. controller main bodys; 52. power modules; 53. drive 1; 54. drive 2; 55. drive 3; 56. drive 4.
Detailed description of the invention
Environment-friendly type underground fracture ground method non-limiting examples of the present invention is as follows:
Embodiment one. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its equipments overall structure is combined by Fig. 1 ~ Fig. 5 and is illustrated, Fig. 1 illustrates environment-friendly type underground fracture stratum of the present invention apparatus structure schematic diagram, Fig. 2 illustrates packer I cut-away structure chart in well, Fig. 3 illustrates packer II cut-away structure chart in well, in this 3 figure: 1 is high-pressure hose, 2 is well inner armor cables, 3 is well top stoppers, 4 is overlying rocks, 5 is boreholes wall, 6 is pit shafts, 7 is packer I in well, 8 is preforation tunnels, 9 is reservoirs, 10 is high-strength cables, 11 is packer II in well, 12 is down-hole tuggers, 13 is horizontal wells, 14 is strainers, 15 is pump lines, 16 is booster pumps, 17 is controllers, 18 is igniters, 19 is sensor clusters, 20 is valves, 21 is expansion chamber.The structure of this device includes: packer 7 and 11, high-pressure hose 1, well inner armor cable 2, high-strength cable 10 in well top stopper 3, down-hole tugger 12, well, and operation controlling organization, sensor cluster 19, be assembled into device.The environment-friendly type underground fracture ground method of this example after perforating job completes according to perforating effect, by the operation controlling organization of the environment-friendly type underground fracture ground bed device of employing, under control well, tugger 12 to draw in two wells packer 7 and 11 to setting layer position, and in two wells, between packer 7 and 11, form the underground fracture ground sheaf space of setting, then control the formulation weight ratio of high-pressure hose 1 according to setting respectively by insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO
2treat in pressure break space under Injection Well in two wells between packer 7 and 11, also control well inner armor cable 2 is or/and the igniting of high-strength cable 10 output point ignition voltage, carry out high energy, high pressure gas fracturing stratum operation, control operation like this realize different fracturing stratum space, different fracturing stratum condition, repeatedly repeat or/and the operation of non-duplicate fracturing stratum and process thereof.Described different fracturing stratum spaces refer to that in described well, packer 7 and 11 forms the underground fracture ground sheaf space set at diverse location.Described different fracturing stratum conditions refer to coal bed gas formation condition or shale gas formation condition.In the well of this example, packer 7 and 11 surface structure is capsule-type or squash type, and its inner structure includes: booster pump 16, strainer 14, control circuit, igniter 18 and spark plug thereof, sensor cluster 19 and connect they high-pressure hose 1, well inner armor cable 2 is or/and high-strength cable 10.The booster pump 16 of this example is arranged in well in packer 7 and 11, connects strainer 14, also by the expansion chamber 21 of packer in pump line 15 connecting well by pump line 15.The strainer 14 of this example is arranged in well packer 7 and 11, by the horizontal well 13 outside packer in pump line 15 connecting well, connects booster pump 16 by pump line 15.Structure and the connection of the control circuit of this example are as follows: by well inner armor cable 2, the controller 17 in packer in well 7 and 11 is connected to terrestrial operation controlling organization and direct current of ground power supply respectively, the controller 17 of this example comprises power module, controller main body and coding/decoding module, the power module of this example selects public power module, DC/DC converter in this way, makes the power supply source of the valve 20 in controller main body, coding/decoding module and well in packer 7 and 11, booster pump 16, igniter 18, sensor cluster 19 etc.The controller that controller 17 main body'choice of this example is public, 51 single-chip microcomputers in this way, controller 17 main body is connected with terrestrial operation controlling organization by coding/decoding module, and controller 17 main body connects and by-pass valve control 20, booster pump 16, igniter 18, sensor cluster 19.The igniter 18 of this example and spark plug thereof select public igniter and spark plug thereof, have coil silicon steel sheet formula igniter in this way.The sensor cluster 19 of this example includes pressure sensor, temperature pick up, and public pressure sensor selected by the pressure sensor of this example, HKM-375 in this way.Public temperature pick up selected by the temperature pick up of this example, in this way K type thermocouple.The well top stopper 3 of this example adopts the structure of prior art, in this way quick plugging device.The down-hole tugger 12 of this example adopts the structure of prior art, in this way SONDEX horizontal well downhole tractor, this down-hole tugger 12 by terrestrial operation controlling organization by well inner armor cable 2 or/and high-strength cable 10 sending controling instruction manipulates.The structure of the operation controlling organization of this example includes: the control circuit in computer or microprocessor group and manipulation software thereof, packer and connect their armored cable 2.Described computer or microprocessor group adopt two-stage or three grades of compositions, and computer or the microprocessor of the described aboveground part of operation controlling organization are host computers, and computer or the microprocessor of the controller of operation controlling organization underground part are that secondary is or/and three grades of machines.Control circuit in the well of this example in packer is illustrated by Fig. 5, in Figure 5: 2 is well inner armor cables, and 16 is booster pumps, 17 is controllers, and 18 is igniters, and 19 is sensor clusters, 20 is valves, 50 is coding/decoding modules, and 51 is controller main bodys, and 52 is power modules, 53 is drivings 1,54 are drivings 2,55 are drivings 3,56 is drivings 4.The host computer computer of this example or microprocessor select public computer or microprocessor, and Intel is to strong E5-2400V2 two-way processor in this way.The well inner armor cable 2 of this example adopts public well logging armored cable, W7BP in this way.The high-strength cable 10 of this example adopts public high-strength cable, 7-46P/NT-XS in this way.Component and the formulation weight ratio thereof of the liquid gun propellant injected in fracturing stratum space of this example are: incendiary agent: oxidant: solvent: sensitizer=5:35:15:10, described incendiary agent is glycerine, and described oxidant is NH
4nO
3, described solvent is water, and described sensitizer is natrium nitrosum.Liquid gun propellant, elementary gunpowder, liquid CO that this example is injected
2the dose weight ratio formula of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=5:1:4, described elementary gunpowder is nitrocotton, the liquid gun propellant of described injection, elementary gunpowder, liquid CO
2the relevant information that the dosage of three kinds of materials, speed and ignition and detonation time are detected by downhole sensor by analysis after determined and control to implement.The composition of insulating liquid that this example is injected or component and formulation weight ratio thereof are: CCl
4: crude oil: water=50:35:30, concrete proportioning must according to liquid gun propellant Auto-regulating System of Density of Heavy Medium.The main program menu of the computer of the operation controlling organization of this example or the manipulation software of microprocessor group has: pressure break position, pressure break space, gunpowder injection, ignition and detonation, end.This main program menu is provided by Fig. 4, in the diagram: 22 is start, 23 is initialize, 24 be in well packer II whether in precalculated position, whether 25 be in front, precalculated position, 26 is open down-hole tugger, 27 is drag high-strength cable, 28 be in well packer I whether in precalculated position, 29 is drag well inner armor cable, 30 is start booster pump, 31 is whether expansion chamber pressure reaches predetermined value, 32 is Open valves, 33 is inject insulating liquid to high-pressure hose, 34 is whether insulating liquid injection rate reaches predetermined value, 35 is inject liquid gun propellant to high-pressure hose, 36 is whether liquid gun propellant injection rate reaches predetermined value, 37 is inject elementary gunpowder to high-pressure hose, 38 is whether elementary gunpowder injection rate reaches predetermined value, 39 is inject liquid CO to high-pressure hose
2, 40 is liquid CO
2whether injection rate reaches predetermined value, 41 is valve-offs, 42 is start monitoring instrument, 43 is that initial igniter is ignited, and 44 is whether the force value of monitoring is stablized, and 45 is wait for that force value is stablized, 46 is whether pressure break produces a desired effect, 47 is removing seal for packers in well, and 48 is that whether pressure break is complete on stratum, and 49 is terminate.Main program menu specifically manipulates: (1) sends instruction through well inner armor cable 2 and high-strength cable 10 to down-hole tugger 12: packer II in packer I in well and well is dragged to the position needing pressure break; (2) pressure break position sends a series of instruction to packer II in packer I in well and well after determining, includes: in well, in packer I and well, packer II sealed orders forms fracturing stratum space; (3) by operation controlling organization and well inner armor cable 2 or/and high-strength cable 10 transmits according to necessarily required formulation weight ratio, respectively by insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO
2treat in pressure break space under high-pressure hose 1 successively Injection Well in two wells between packer I, II; (4) controller 17/ sensor cluster 19 Monitoring instruction: detect gunpowder and inject situation, igniting blasting instruction, removing seal for packer instruction in packer sealing and well in well; (5) repeatedly fracturing stratum instruction or the repeatedly instruction of refracturing stratum; (6) total fracturing stratum process END instruction.The whole implementation process step of the method is as follows: a. carries out device and assembles, and namely each several part of composition is assembled apparatus for converting.B. down-hole tugger 12 is adopted the underground part of device to be drawn to default fracturing work layer position, down-hole.C. well top stopper 3 is adopted to close well head, described well top stopper 3 selects public well top stopper, quick plugging device in this way, well top stopper 3 inlet screw interface is connected a Move tool, as being chosen as drilling tool, then by dragging Move tool, well top stopper 3 being fixed on and treating in shutoff pit shaft and then shutoff well head.D. in employing well, in packer I (7), well, the DH environmental protection type fracturing stratum space forming setting closed jointly by packer II (11), DH environmental protection type fracturing stratum space between packer 7,11 in formation well.E. fill insulating liquid by high-pressure hose 1 to the DH environmental protection type fracturing stratum space set, regulated and controled by the valve 20 pairs of injection liquid flow velocitys and flow operating controlling organization regulation and control high-pressure hose 1.F. then inject liquid gun propellant by high-pressure hose 1, utilize liquid gun propellant pressure itself to extrude insulating liquid, respectively by liquid gun propellant, elementary gunpowder, liquid CO
2treat in fracturing stratum space, until fill successively under Injection Well in two wells between packer I and II.G. well inner armor cable 2 is passed through or/and high-strength cable 10 output point ignition voltage, and lighted a fire by control circuit, ignite liquid gun propellant etc., and in start sensor assembly 19 pairs of closed cavities, temperature and pressure is monitored, realize the clean fracturing stratum operation that this treats in fracturing stratum space.The liquid gun propellant surge pressure of described igniting blasting can reach 10 ~ 200MPa, and maximum temperature can reach 1000 ~ 2000 DEG C, and the fracturing stratum duration reaches 10 ~ 40s, and fracturing effect is good, and energy pressure break many radial fissures, can through connection intrinsic fracture.H. to adopt packer II in packer I in well, well jointly to close to form the DH environmental protection former space of type fracturing stratum or adopt in well packer II in packer I, well jointly to close and form the new space of DH environmental protection type fracturing stratum, repeat above-mentioned e, f, g tri-step, to carry out same fracturing stratum space, down-hole or different fracturing stratum space repeatedly fracturing operation and process thereof.The superior function of Here it is environment-friendly type underground fracture ground method of the present invention.In described fracturing stratum process, insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in same fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum.This is the transform method of environment-friendly type underground fracture ground method of the present invention.In described fracturing stratum process, insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in different fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum.This is again the transform method of environment-friendly type underground fracture ground method of the present invention.
Embodiment two. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one have: 1. the component of the liquid gun propellant injected in fracturing stratum space of this example and formulation weight ratio thereof are: incendiary agent: oxidant: solvent: sensitizer=12:75:40:45, described incendiary agent is diethylene glycol, described oxidant is NaNO
3, described solvent is water, and described sensitizer is natrium nitrosum.2. liquid gun propellant, elementary gunpowder, the liquid CO of the injection of this example
2the dose weight ratio formula of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=6:1:3, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CCl
4: crude oil: water=35:27:23.4. the controller that controller 17 main body'choice of this example is public, DSP in this way.5. the host computer computer of this example or microprocessor select public computer or microprocessor, DELLT7910 work station in this way.The environment-friendly type underground fracture ground method of this example all the other do not state, be entirely same as described in embodiment one, no longer repeat.
Embodiment three. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and embodiment one, the environment-friendly type underground fracture ground method difference of embodiment two has: 1. the component of the liquid gun propellant injected in fracturing stratum space of this example and formulation weight ratio thereof are: incendiary agent: oxidant: solvent: sensitizer=7:50:23:22, described incendiary agent is urea, described oxidant is KNO
3, described solvent is water, and described sensitizer is natrium nitrosum.2. liquid gun propellant, elementary gunpowder, the liquid CO of the injection of this example
2the dose weight ratio formula of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=7:1:2, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CCl
4: crude oil: water=45:32:27, the environment-friendly type underground fracture ground method of this example all the other do not state, be entirely same as described in embodiment one, embodiment two, no longer repeat.
Embodiment four. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one ~ embodiment three have: 1. the component of the liquid gun propellant injected in fracturing stratum space of this example and formulation weight ratio thereof are: incendiary agent: oxidant: solvent: sensitizer=10:60:32:33, described incendiary agent is glycerine, described oxidant is NH
4clO
4, described solvent is water, and described sensitizer is natrium nitrosum.2. liquid gun propellant, elementary gunpowder, the liquid CO of the injection of this example
2the dose weight ratio formula of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=8:1:1, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CCl
4: crude oil: water=40:30:25, the environment-friendly type underground fracture ground method of this example all the other do not state, be entirely same as described in embodiment one ~ embodiment three, no longer repeat.
Embodiment five. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one ~ embodiment four have: 1. this routine liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 3:1, NH with the formulation weight ratio of glycerine
4nO
3with glycerine totally 4 parts be 75%, moisture content is 25%.2. the liquid gun propellant of this example injection, the dose weight ratio formula of elementary gunpowder two kinds of materials are: liquid gun propellant: elementary gunpowder=9:1, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CaCl
2: crude oil: water=50:35:30, this routine environment-friendly type underground fracture ground method all the other do not state, be entirely same as described in embodiment one ~ embodiment four, no longer repeat.
Embodiment six. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one ~ embodiment five have: 1. this routine liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 4.5:1, NH with the formulation weight ratio of glycerine
4nO
3with glycerine totally 5.5 parts be 65%, moisture content is 35%.2. the liquid gun propellant of this example injection, the dose weight ratio formula of elementary gunpowder two kinds of materials are: liquid gun propellant: elementary gunpowder=10:1, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CaCl
2: crude oil: water=35:27:23.This routine environment-friendly type underground fracture ground method all the other do not state, be entirely same as described in embodiment one ~ embodiment five, no longer repeat.
Embodiment seven. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one ~ embodiment six have: 1. this routine liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 3.5:1 with the formulation weight ratio of glycerine, moisture content is 27%.2. the liquid gun propellant of this example injection, the dose weight ratio formula of elementary gunpowder two kinds of materials are: liquid gun propellant: elementary gunpowder=5:1, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CaCl
2: crude oil: water=45:32:27.This routine environment-friendly type underground fracture ground method all the other do not state, be entirely same as described in embodiment one ~ embodiment six, no longer repeat.
Embodiment eight. environment-friendly type underground fracture ground method
The environment-friendly type underground fracture ground method of this example is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its device concrete structure can be combined with Fig. 1 ~ Fig. 5 etc. and illustrated, the environment-friendly type underground fracture ground method of this example and the environment-friendly type underground fracture ground method difference of embodiment one ~ embodiment seven have: 1. this routine liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 4:1 with the formulation weight ratio of glycerine, moisture content is 31%; 2. the liquid gun propellant of this example injection, the dose weight ratio formula of elementary gunpowder two kinds of materials are: liquid gun propellant: elementary gunpowder :=6:1, described elementary gunpowder is nitrocotton.3. the composition of insulating liquid that injects of this example or component and formulation weight ratio thereof are: CaCl
2: crude oil: water=40:30:25.This routine environment-friendly type underground fracture ground method all the other do not state, be entirely same as described in embodiment one ~ embodiment seven, no longer repeat.
Claims (8)
1. an environment-friendly type underground fracture ground method, it is a kind of clean method that can not pollute the underground fracture stratum of mine and subsurface environment, the method adopts environment-friendly type underground fracture ground bed device to realize, its equipments overall structure includes: well top stopper, down-hole tugger, packer in well, high-pressure hose, well inner armor cable, high-strength cable, operation controlling organization, sensor cluster, be assembled into device, be characterised in that: this described environment-friendly type underground fracture ground method after perforating job completes according to perforating effect, by the operation controlling organization of the environment-friendly type underground fracture ground bed device of employing, under control well, tugger draws the underground fracture ground sheaf space that packer to setting layer position in two wells also forms setting, control the formulation weight ratio of high-pressure hose according to setting more respectively by insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO
2treat in pressure break space under Injection Well in two wells between packer, also control well inner armor cable is or/and the igniting of high-strength cable output point ignition voltage, carry out high energy, high pressure gas fracturing stratum operation, control operation like this realize different fracturing stratum space, different fracturing stratum condition, repeatedly repeat or/and the operation of non-duplicate fracturing stratum and process thereof.
2. environment-friendly type underground fracture ground method according to claim 1, is characterised in that: the process steps of the method is as follows:
A. carry out device to assemble;
B. adopt down-hole tugger that the underground part of device is drawn to down-hole and preset layer position;
C. well top stopper is adopted to close well head;
D. in employing well, in packer I, well, packer II closes the DH environmental protection type fracturing stratum space forming setting jointly;
E. fill insulating liquid by high-pressure hose to the DH environmental protection type fracturing stratum space set, by operation controlling organization regulation and control high-pressure hose valve, injection liquid flow velocity and flow are regulated and controled;
F. then inject liquid gun propellant by high-pressure hose and extrude insulating liquid, described liquid gun propellant is according to necessarily required formulation weight ratio, respectively by liquid gun propellant, elementary gunpowder, liquid CO
2treat in fracturing stratum space successively under Injection Well in two wells between packer I and II;
G. well inner armor cable is passed through or/and high-strength cable output point ignition voltage, and lighted a fire by control circuit, ignite liquid gun propellant, and start sensor assembly is monitored temperature and pressure in closed cavity, realizes the clean fracturing stratum operation that this treats in fracturing stratum space;
H. packer II in packer I in well, well is adopted jointly to close to form the DH environmental protection former space of type fracturing stratum or adopt in well packer II in packer I, well jointly to close again to be formed the new space of DH environmental protection type fracturing stratum to repeat above-mentioned e, f, g tri-step, to carry out same fracturing stratum space, down-hole or different fracturing stratum space repeatedly fracturing operation and process thereof.
3. environment-friendly type underground fracture ground method according to claim 2, is characterised in that:
A. in described fracturing stratum process, insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in same fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum;
B. in described fracturing stratum process, insulating liquid, liquid gun propellant, elementary gunpowder, liquid CO are repeatedly injected in different fracturing stratum space
2, repeatedly light a fire, realize repeatedly repeating or/and the operation of non-duplicate fracturing stratum.
4. environment-friendly type underground fracture ground method according to claim 3, is characterised in that:
A. in described well, packer surface structure is capsule-type or squash type, and its inner structure includes: booster pump, strainer, control circuit, igniter and spark plug thereof, sensor cluster and connect their armored cable or/and high-strength cable;
B. described well top stopper adopts the structure of prior art;
C. described down-hole tugger adopts the structure of prior art, this down-hole tugger by terrestrial operation controlling organization by well inner armor cable or/and high-strength cable sending controling instruction manipulates.
5. environment-friendly type underground fracture ground method according to claim 4, is characterised in that:
The structure of a. described operation controlling organization includes: the control circuit in computer or microprocessor group and manipulation software thereof, packer and connect their armored cable;
B. described well inner armor cable adopts public well logging armored cable; Described high-strength cable adopts public high-strength cable.
C. described sensor cluster includes: pressure sensor, temperature pick up.
6. environment-friendly type underground fracture ground method according to claim 5, be characterised in that: component and the formulation weight ratio thereof of the described liquid gun propellant injected in fracturing stratum space are: incendiary agent: oxidant: solvent: sensitizer=5 ~ 12:35 ~ 75:15 ~ 40:10 ~ 45, described incendiary agent is glycerine, diethylene glycol, urea, and described oxidant is NH
4nO
3, NaNO
3, KNO
3, NH
4clO
4, described solvent is water, and described sensitizer is natrium nitrosum.
7. environment-friendly type underground fracture ground method according to claim 6, is characterised in that:
A. the composition of the insulating liquid of described injection or component and formulation weight ratio thereof are: CCl
4or CaCl
2: crude oil: water=35 ~ 50:35 ~ 27:30 ~ 23;
B. described liquid gun propellant goodization formulation weight ratio is as follows: oxidant is NH
4nO
3, incendiary agent is glycerine, and solvent is water, wherein NH
4nO
3be 3.0 ~ 4.5:1 with the formulation weight ratio of glycerine, moisture content is 25 ~ 35%;
C. liquid gun propellant, elementary gunpowder, the liquid CO of described injection
2the formulation weight ratio of three kinds of materials is: liquid gun propellant: elementary gunpowder: liquid CO
2=5 ~ 10:1:0 ~ 4, described elementary gunpowder is nitrocotton, described liquid CO
2can have or nothing, the liquid gun propellant of described injection, elementary gunpowder, liquid CO
2the relevant information that the dosage of three kinds of materials, speed and ignition and detonation time are detected by downhole sensor by analysis after determined and control to implement.
8. environment-friendly type underground fracture ground method according to claim 7, is characterised in that: the main program menu of the computer of described operation controlling organization or the manipulation software of microprocessor group has: pressure break position, pressure break space, gunpowder injection, ignition and detonation, end.
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| CN106837283A (en) * | 2017-01-09 | 2017-06-13 | 胡少斌 | CO2The pressure break displacement Pintsch process integral system of base nanometer cumulative multi-phase flow |
| CN107401400A (en) * | 2016-07-15 | 2017-11-28 | 中国石油天然气股份有限公司 | Fracturing system |
| CN110454131A (en) * | 2019-08-19 | 2019-11-15 | 中国石油大学(华东) | A kind of fill-type detonation cumulative volume fracturing method in seam |
| CN110939424A (en) * | 2019-11-27 | 2020-03-31 | 西安物华巨能爆破器材有限责任公司 | Well-free underground coal gasification ignition method |
| CN111734384A (en) * | 2020-07-08 | 2020-10-02 | 通源石油科技集团股份有限公司 | Liquid gunpowder deflagration fracturing method and application thereof |
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| CN111734384A (en) * | 2020-07-08 | 2020-10-02 | 通源石油科技集团股份有限公司 | Liquid gunpowder deflagration fracturing method and application thereof |
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Application publication date: 20151230 |