CN102330547A - Micro-fracture explosion propagation device for interlayer explosion laboratory study - Google Patents
Micro-fracture explosion propagation device for interlayer explosion laboratory study Download PDFInfo
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Abstract
The invention discloses a micro-fracture explosion propagation device for interlayer explosion laboratory study. The device comprises first bakelite, a detonator, an explosion propagation explosive, an aluminum inner core, an aluminum inner core groove, a bakelite pipe body and second bakelite, wherein the detonator is fixed on the first bakelite; the first bakelite is adhered at one end of the bakelite pipe body; the aluminum inner core is provided with a central hole; the explosion propagation explosive is filled in the central hole of the aluminum inner core; the aluminum inner core groove is formed on the aluminum inner core; the aluminum inner core is sleeved in the bakelite pipe body; and the second bakelite is adhered at the other end of the bakelite pipe body. The device is convenient to use, has a smaller volume, saves materials and can be used for accurately measuring explosion propagation data of a suspension explosive and a liquid explosive in an underground micro-fracture in the process of imitating underground perforation fracturing operation and interlayer explosion and indirectly measuring pressure and temperature variation numerical values from a wellhead to an operation layer.
Description
Technical field
The present invention relates to a kind of microcrack high explosive trains device, particularly relate to a kind of microcrack propagation of explosion device that is used for the exploding in fracture desk research.
Background technology
Up to now, the field of oil field secondary raising the output developmental research is quite wide, but the subject under discussion of main research is meant the raising the output exploitation of low permeability oil field oil-gas reservoir.Because the petroleum reserves of China's LOW PERMEABILITY RESERVOIR is very considerable, the low-permeability oilfield oil in place of newly verifying has billions of tons, accounts for 1/4 of China's oil gross reserves.Low-permeability oil deposit adopts straight well and schemes such as straight infill well exploitation, waterflooding extraction and horizontal well development usually.Straight well utilizes the stratum energy exploitation with straight infill well, and recovery ratio is low.Waterflooding extraction and fracturing developing are the relatively more current development plans of present most of low-permeability oil deposit, need to increase drilling well well number and oil formation improvement number of times, and cost of winning improves.Horizontal well development is a new technology that grows up nearly more than ten years, because the drilling well difficulty is big, does not also obtain widespread usage.The low-permeability oil deposit reservoir conditions is poor, development technique is single, the exploitation level is low, so recovery ratio is generally low, less economical, has restricted the efficient exploitation of China's low-permeability oil deposit.
Be 0.1 * 10 to permeability at present
-3-50 * 10
-3Mm
2Low hole, LOW PERMEABILITY OILFIELD DEVELOPMENT mainly adopt fracturing and acidifying technological transformation oil reservoir.But can only form a vertical fracture of splitting perpendicular to the both wings of minimum principal stress in the very low oil-gas reservoir fracturing of permeability; Secondary fracturing in the old oil formation improvement; Also often just along old fracture extension; Can not form the crack in new orientation, oil gas can only flow into the major fracture output through original micro-pore; And still being difficult to extraction from major fracture oil gas far away, the recovery ratio that how to improve the low-permeability oil gas field is the problem demanding prompt solution that China Petroleum faces.If can suitable detonation medicine be pressed in waterpower or the intrinsic fracture, ignite detonation medicine there, make it around major fracture, produce the substantial radial crack, for flow pass being provided, can greatly improve the oil recovery ratio away from major fracture oil gas.The oil-gas reservoir of low-permeability, the horizontal fracture of same length is more remarkable than vertical fracture effect of increasing production.In the low-permeability oil gas reservoir, being pressed into the detonation medicine secondary fracture that forms many in the vertical fracture of fracturing will be the important way of an efficient exploitation.
Geologic feature to LOW PERMEABILITY RESERVOIR; Analyzing and a large amount of correlation technique documents both at home and abroad of research, and using new technology, the new method of present correlation technique development, existing research and design thought is: how to work out a kind of new yield-increasing technology; Utilize hydraulic fracturing technology that suitable detonation medicine is pressed in the hydraulic fracture; Ignite detonation medicine there, thereby around major fracture, produce the substantial radial crack, for flow pass being provided away from major fracture oil gas.Disclose according to United States Patent (USP), as " Pictured dip " stratum (0.02md), strata pressure is 800Psi, fracture condudtiviy 3md-ft, and the productivity ratio of 100ft horizontal fracture is big 6 times than the single vertical fracture of 1000ft approximately.Another example is provided in " fracturing " book by people such as Howard and analyzes; For higher permeability (0.2md) stratum; Strata pressure 1700Psi and fracture condudtiviy 150md-ft, the productivity ratio of the horizontal fracture of a 200ft is big 1.5 times than a 200ft vertical fracture.More than argumentation shows, the oil-gas reservoir of low-permeability, and the horizontal fracture of same length is more remarkable than vertical fracture effect of increasing production.In the low-permeability oil gas reservoir, it is necessary more to be pressed into the detonation medicine secondary fracture that forms many in the vertical fracture of fracturing.Existing research purpose is further to improve correctional effect, need carry out LOW PERMEABILITY RESERVOIR exploding in fracture technical feasibility study, and an amount of detonation gunpowder is injected hydraulic fracture or oil reservoir, realizes that liquid gun propellant fires in the stratum, forms the microcrack system.
The main contents of existing research are following: carry out researchs such as liquid gun propellant prescription, exploding in fracture increasing yield, construction technology and safety, confirm to be suitable for the reservoir characteristic of exploding in fracture.Through field trial, check this technology in Fuyu County the oil reservoir Application feasibility, effectively employ the exploration new way for Fuyu County's oil reservoir reserves.Inst. of Mechanics, CAS and seepage flow dynamics research institute are in recent years to the low-permeability oil gas field, and " exploding in fracture " yield-increasing technology is studied.The Chinese Academy of Sciences has set up the small scale analogue experiment installation, under the small scale condition, proves " exploding in fracture " feasibility.Through simulated test, found one group " exploding in fracture " at least with extraordinary fiery explosive basic recipe; Realized the basic process of squeeze note, igniting and the detonation of extraordinary fiery explosive on less than the 200mm yardstick, its surge pressure is about 100MPa; Economy, the safety of this special type fire explosive possibly reach production requirement, thereby confirm " exploding in fracture " principle basic feasible solution.And confirm that theoretically the detonation of thin layer medicine is feasible, proposed to consider the MODEL FOR ONE DIMENSIONAL COMPRESSIBLE FLUID FLOW mechanics model of chemical reaction.
Certain work has also been done by Xi'an Petroleum University aspect exploding in fracture; The field trial and the popularization of liquid medicine pressure break have successfully been carried out; At the formulation optimization of liquid medicine, liquid snack made with traditional Chinese medicines fire, aspects such as safety and construction technology have accumulated rich experience and data; In addition, indoor igniting has been carried out in burning in hydraulic fracture to detonation medicine slurry, and a large amount of work has also been carried out in aspects such as suspension and safety.But oil field secondary raising the output developmental research is a vast and numerous engineering, needs to drop into lot of manpower and material resources, and 500,000 yuan at least of the expenses of each mouthful experiment well are millions of at most even up to ten million.
The investment cost of the simulating lab test research device of some research units is also quite huge; Huge fund is all thrown by domestic Chinese Academy of Sciences mechanics and seepage flow dynamics research institute, China University Of Petroleum Beijing, Southwest Petrol University, Xi'an Petroleum University; Set up corresponding laboratory, set up the test research device relevant with exploding in fracture.And volume is little, and reduced investment is convenient to transportation, and method for using is simple, and the microcrack serial experiment research device that can in suspension explosive and liquid explosives research, exhibit one's skill to the full does not simultaneously occur as yet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of microcrack propagation of explosion device that is used for the exploding in fracture desk research; It is easy to use; Volume is less, material savings, the pressure, temperature variation numerical value when accurate measure analog downhole perforation fracturing work of ability and exploding in fracture from the well head to the work layer.
The present invention solves above-mentioned technical problem through following technical proposals: a kind of microcrack propagation of explosion device that is used for the exploding in fracture desk research; It is characterized in that it comprises first bakelite, detonator, booster explosive, aluminium inner core, aluminium inner core groove, bakelite body, second bakelite, detonator is fixed on first bakelite; First bakelite is bonded in an end of bakelite body; The aluminium inner core has centre bore, and booster explosive is contained in the centre bore of aluminium inner core, and aluminium inner core groove is opened on the aluminium inner core; The aluminium inner core cover is in the bakelite body, and second bakelite is bonded in the other end of bakelite body.
Preferably, said first bakelite is provided with two first perforates that are arranged in parallel, and detonator has lead-in wire, and lead-in wire is inserted in respectively in two first perforates.
Preferably, the diameter of said first perforate is 1.5mm.
Preferably, the centre of said second bakelite has second perforate.
Preferably, the diameter of said second perforate is 12 to 15mm.
Preferably, the shape of the shape of said first bakelite and second bakelite all is a cylinder.
Positive progressive effect of the present invention is: the microcrack propagation of explosion device that the present invention is used for the exploding in fracture desk research is used to measure the propagation of explosion state in the fine fisssure slit behind suspension explosive, liquid explosives and other energetic material explosive combustions; The measurement series of definite numerical value of limit area and detonation ability that comprises limiting length, the propagation of explosion of propagation of explosion; For desk research provides a kind of compact conformation device; Easy to use; Volume is less, material savings, the pressure, temperature variation numerical value when accurate measure analog downhole perforation fracturing work suspension explosive of ability and the propagation of explosion data of liquid explosives in microcrack and indirect measurement exploding in fracture from the well head to the work layer.
Description of drawings
Fig. 1 is used for the structural representation of the microcrack propagation of explosion device of exploding in fracture desk research for the present invention.
Fig. 2 is the structural representation of first bakelite among the present invention.
Fig. 3 is the structural representation of detonator among the present invention.
Fig. 4 is the structural representation of aluminium inner core among the present invention.
Fig. 5 is the structural representation of second bakelite among the present invention.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.
To shown in Figure 5, the microcrack propagation of explosion device that the present invention is used for the exploding in fracture desk research comprises first bakelite 1, detonator 2, booster explosive 3, aluminium inner core 4, aluminium inner core groove 5, bakelite body 6, second bakelite 7 like Fig. 1, and detonator 2 is fixed on first bakelite 1; First bakelite 1 is provided with two first perforates 11 that are arranged in parallel; Detonator 2 has lead-in wire 21, and lead-in wire 21 is inserted in respectively in two first perforates 11, and first bakelite 1 is bonded in an end of bakelite body 6; Booster explosive 3 is contained in the centre bore 41 of aluminium inner core 4; Aluminium inner core groove 5 is opened on aluminium inner core 4, and aluminium inner core 4 is enclosed within the bakelite body 6, and second bakelite 7 is bonded in the other end of bakelite body 6.The centre of second bakelite 7 has second perforate 71.The diameter of first perforate 11 is 1.5mm.The diameter of second perforate 71 is 12 to 15mm.The shape of the shape of first bakelite 1 and second bakelite 7 all is a cylinder.
First bakelite is mainly used in and connects and priming device is installed, and is mainly used in detonating and igniting booster explosive of detonator; The diameter of detonator is 6.35mm, and length is 15.5mm; Booster explosive is mainly used in the detonation wave of detonator is amplified and ignites suspension explosive and liquid explosives, and then observes liquid explosives and suspension explosive in the propagation of explosion situation in groove and slit necessarily; The aluminium inner core is the center of whole microcrack propagation of explosion, and it observes liquid explosives and the explosion imprint of suspension explosive and the propagation of explosion situation in microcrack through aluminium inner core groove; Aluminium inner core groove is used for test and holds suspension explosive and liquid explosives, and observes the vestige of microcrack propagation of explosion in quick-fried back; Bakelite body and aluminium inner core groove constitute the storage area of contain fluid explosive and suspension explosive; Can hold suspension explosive and liquid explosives in second perforate of second bakelite, make the groove of whole aluminium inner core bottom all be full of explosive, constitute the grooved channel system.
When doing the experiment of suspension explosive and liquid explosives, earlier detonator is fixed on first bakelite, on first bakelite, plays first perforate of two parallel connections, the detonator lead-in wire is inserted respectively in two first perforates, then the eyelet of first perforate is obturaged with glue, for use; Booster gains is put in the centre bore of aluminium inner core; The aluminium inner core is packed in the ebonite tube, then, first bakelite that installs detonator is bonded on the bakelite body; Second bakelite is bonded in the lower end of bakelite body; The detonator lead-in wire is connected on the detonating cord; And the microcrack propagation of explosion device that the present invention is used for the exploding in fracture desk research placed (" experimental facilities that is used for oil field exploding in fracture desk research " applied for a patent in addition in " experimental facilities that is used for oil field exploding in fracture desk research "; Number of patent application is 201120263935.0) in; After liquid explosives or suspension explosive pack into from apparatus of the present invention bottoms; Apparatus of the present invention are hung on the high temperature and high pressure kettle that diameter is 125mm together with " experimental facilities that is used for oil field exploding in fracture desk research "; Microcrack experimental facilities and inner institute holding liquid explosive or suspension explosive are in high-temperature high-pressure state after boosting; Be the high temperature and high pressure kettle outer apparatus to cause bursting of 125mm detonate suspension explosive or liquid explosives by diameter this moment, because suspension explosive or liquid explosives blast or temperature and pressure data that detonation produced, determines the change curve of its temperature and pressure simultaneously when directly reading experiment by the high temperature and high pressure kettle computer display.Observe the propagation of explosion vestige in the slit and the increment in crack on the aluminium inner core, and obtain the propagation of explosion capacity data of liquid explosives and suspension explosive through high temperature and high pressure kettle pressure meter and electronic measurement system.The microcrack propagation of explosion device that the present invention is used for the exploding in fracture desk research is used to measure the propagation of explosion state in the fine fisssure slit behind suspension explosive, liquid explosives and other energetic material explosive combustions; The measurement series of definite numerical value of limit area and detonation ability that comprises limiting length, the propagation of explosion of propagation of explosion; For desk research provides a kind of compact conformation device; Easy to use; Volume is less, material savings, liquid explosives and the propagation of explosion situation of suspension explosive in microcrack and the indirect pressure, temperature variation numerical value of measuring from the well head to the work layer when accurate measure analog downhole perforation fracturing work of ability and exploding in fracture.
With the critical surface size research of suspension explosive smooth combustion blast, the experiment of propagation of explosion limit sectional area extremely practical situations of microcrack experimental facilities is described, suspension explosive dose 32-50g, specifically shown in table one:
Table one
| Ф 10 * 150 powder charges | Reliable propagation of explosion |
| Ф 12 * 150 powder charges | Reliable propagation of explosion |
| Ф 14 * 150 powder charges | Reliable propagation of explosion |
| Four-way 4mm * 2mm groove powder charge | Reliable propagation of explosion |
On the basis of above-mentioned test,, carry out high temperature and high pressure kettle suspension medicine little sample testing, to obtain corresponding test parameters for grasping low permeability oil field microcrack least limit propagation of explosion slit or limit propagation of explosion area.
Adopt 5mm * 1.5mm aluminium inner core and 5mm * 1.0mm aluminium inner core to annotate dress suspension medicine, the biography of observing under uniform temperature and pressure is ignited situation.
Test divides to be carried out for three times, has at first carried out 5mm * 1.5mm aluminium inner core propagation of explosion, has carried out 5mm * 1.0mm on this basis again and has passed blasting test; On twice successful propagation of explosion basis, to carry out 5mm * three tests of 1.5mm repeated experiments again and all realized propagation of explosion, test situation is following:
One, 5mm * 1.5mm (5mm refers to the width of aluminium core groove, and 1.5mm refers to the degree of depth of aluminium core groove, below roughly the same) aluminium inner core propagation of explosion test.
Adopt blasting cap initiation, record 7.7 ohm of detonator resistance.Aluminium inner core top dispenser booster explosive 1.5g, the built-in booster explosive piece of inverted draw cut ditch 0.5g on the aluminium inner core respectively adorns 1g booster explosive grain in bulk in top and the bottom.Piston is 247mm apart from top, and the bottom is 75mm apart from the member bottom, and the suspension medicine 31.6g that packs into connects and surveys 7.8 ohm of initiation system resistance, 9.1 ohm of whole system resistance behind the higher temperature line.
High temperature and high pressure kettle: go up 60 ℃ of hot spots, 100 ℃ of following survey hot spots, 120 ℃ of the following survey hot spot upper limits, upper pressure limit 60MPa, record is shown in following table two:
Table two 5mm * 1.5mm aluminium inner core propagation of explosion process of the test data
Two, 5mm * 1.0mm aluminium inner core test.
Use blasting cap initiation, 9.9 ohm of detonator resistance, top and the bottom respectively add the 1g booster explosive.Record 9.1 ohm of member resistance, 10.2 ohm of whole system resistance, dress suspension medicine 33.2g.
High temperature and high pressure kettle: go up 60 ℃ of hot spots, 120 ℃ of following survey hot spots, 150 ℃ of the following survey hot spot upper limits, upper pressure limit 60MPa, record is shown in following table three.
Pressure increment 7.79MPa, the video record pressure meter is raised to 44MPa, and video record pressure increment 15.55MPa. takes member apart; Piston is 12mm apart from top, and the bakelite circle is 70mm apart from the bottom, and ebonite tube and aluminium inner core propagation of explosion vestige are obvious; Show quick-friedly entirely, have the reliability that propagation of explosion is ignited.
Table three 5mm * 1.0mm aluminium inner core propagation of explosion process of the test data record
Three, marginal test:
Center fixture still is 5mm * 1.5mm aluminium inner core, and difference is that member is put into high temperature and high pressure kettle, cools off increasing temperature and pressure again after 24 hours after the increasing temperature and pressure.This test is used booster explosive 1.5g with booster explosive piece 2.5g in the aluminium inner core, top is with booster explosive grain 0.5g; Use 1.0g below, used suspension medicine 37.2g, recorded 2.4 ohm of detonator resistance; Behind the weldering higher temperature line 2.4 ohm, connect that resistance is 2.9 ohm behind the detonating cord, 5.0 ohm of whole system resistance.
High temperature and high pressure kettle is set: go up 60 ℃ of hot spots, and 120 ℃ of following survey hot spots, 150 ℃ of the following survey hot spot upper limits, upper pressure limit 60MPa, record is shown in following table four.Back pressure appreciation 12.92MPa detonates.
Take member apart, it is suitable for reading that piston rises to member; The bakelite circle is 80mm apart from the bottom, tests quick-friedly entirely, and the propagation of explosion vestige is clear, and the propagation of explosion effect is obvious.
Table four 5mm * 1.5mm aluminium inner core propagation of explosion marginal test process data
The microcrack propagation of explosion device that is used for the exploding in fracture desk research with the present invention is ignition least limit sectional area 5mm
2, when sectional area is big more, it is more reliable obvious to pass blasting effect.In still, place after 24 hours, the detonation pressure similarity condition under rises in value and decreases, analysis be by sealing ring impaired due to.The microcrack propagation of explosion device that adopts the present invention to be used for the exploding in fracture desk research can provide the experimental study data for the raising the output of oil field secondary by simulation oil field down-hole microcrack state fully.
The microcrack propagation of explosion device that the present invention is used for the exploding in fracture desk research is the work of oil field secondary raising the output exploitation desk research; Setting up one is used under high-temperature high-pressure state; The reset condition of down-hole, full-scope simulation oil field; And can be under such state, obtain suspending explosive and the propagation of explosion state of liquid explosives in the microcrack of stratum provide shortcut for suspension explosive and liquid explosives get into the practice of construction research of down-hole, oil field.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these embodiments.Therefore, protection scope of the present invention is limited appended claims.
Claims (6)
1. a microcrack propagation of explosion device that is used for the exploding in fracture desk research is characterized in that, it comprises first bakelite, detonator, booster explosive, aluminium inner core, aluminium inner core groove, bakelite body, second bakelite; Detonator is fixed on first bakelite, and first bakelite is bonded in an end of bakelite body, and the aluminium inner core has centre bore; Booster explosive is contained in the centre bore of aluminium inner core; Aluminium inner core groove is opened on the aluminium inner core, and the aluminium inner core cover is in the bakelite body, and second bakelite is bonded in the other end of bakelite body.
2. the microcrack propagation of explosion device that is used for the exploding in fracture desk research as claimed in claim 1 is characterized in that said first bakelite is provided with two first perforates that are arranged in parallel, and detonator has lead-in wire, and lead-in wire is inserted in respectively in two first perforates.
3. the microcrack propagation of explosion device that is used for the exploding in fracture desk research as claimed in claim 2 is characterized in that the diameter of said first perforate is 1.5mm.
4. the microcrack propagation of explosion device that is used for the exploding in fracture desk research as claimed in claim 1 is characterized in that the centre of said second bakelite has second perforate.
5. the microcrack propagation of explosion device that is used for the exploding in fracture desk research as claimed in claim 4 is characterized in that, the diameter of said second perforate is 12 to 15mm.
6. the microcrack propagation of explosion device that is used for the exploding in fracture desk research as claimed in claim 1 is characterized in that the shape of the shape of said first bakelite and second bakelite all is a cylinder.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102619496A (en) * | 2012-04-12 | 2012-08-01 | 中国科学院力学研究所 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
| CN105301181A (en) * | 2015-07-08 | 2016-02-03 | 中国石油大学(华东) | Detonation gas rock breaking experimental device and method |
| CN106437665A (en) * | 2016-10-14 | 2017-02-22 | 安徽理工大学 | Testing method and system for researching blasting anti-reflection mechanism |
| CN107907664A (en) * | 2018-01-09 | 2018-04-13 | 四川华川工业有限公司 | Ambient condition temperature-pressure experimental rig and analogy method in one kind simulation shale gas-bearing formation |
| CN108252702A (en) * | 2018-02-06 | 2018-07-06 | 西安石油大学 | The oil and gas reservoir volume remodeling method of seam in a kind of seam |
| CN110306966A (en) * | 2019-07-22 | 2019-10-08 | 屈波 | Liquid explosives injection and exploding in fracture fracturing device for oil-gas casing well |
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2011
- 2011-09-23 CN CN201110285987A patent/CN102330547A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619496A (en) * | 2012-04-12 | 2012-08-01 | 中国科学院力学研究所 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
| CN102619496B (en) * | 2012-04-12 | 2014-09-24 | 中国科学院力学研究所 | Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock |
| CN105301181A (en) * | 2015-07-08 | 2016-02-03 | 中国石油大学(华东) | Detonation gas rock breaking experimental device and method |
| CN106437665A (en) * | 2016-10-14 | 2017-02-22 | 安徽理工大学 | Testing method and system for researching blasting anti-reflection mechanism |
| CN107907664A (en) * | 2018-01-09 | 2018-04-13 | 四川华川工业有限公司 | Ambient condition temperature-pressure experimental rig and analogy method in one kind simulation shale gas-bearing formation |
| CN108252702A (en) * | 2018-02-06 | 2018-07-06 | 西安石油大学 | The oil and gas reservoir volume remodeling method of seam in a kind of seam |
| CN110306966A (en) * | 2019-07-22 | 2019-10-08 | 屈波 | Liquid explosives injection and exploding in fracture fracturing device for oil-gas casing well |
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Application publication date: 20120125 |