CN110397429A - It is a kind of that swollen oil gas field yield-increasing technology is pressed based on electrohydraulic effect and rock - Google Patents
It is a kind of that swollen oil gas field yield-increasing technology is pressed based on electrohydraulic effect and rock Download PDFInfo
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- CN110397429A CN110397429A CN201910834944.1A CN201910834944A CN110397429A CN 110397429 A CN110397429 A CN 110397429A CN 201910834944 A CN201910834944 A CN 201910834944A CN 110397429 A CN110397429 A CN 110397429A
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- 239000011435 rock Substances 0.000 title claims abstract description 66
- 230000000694 effects Effects 0.000 title claims abstract description 27
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 230000009471 action Effects 0.000 claims abstract description 5
- 230000035699 permeability Effects 0.000 claims abstract description 5
- 230000035939 shock Effects 0.000 claims abstract description 5
- 238000011897 real-time detection Methods 0.000 claims abstract description 4
- 239000003079 shale oil Substances 0.000 claims description 15
- 238000011161 development Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 208000010392 Bone Fractures Diseases 0.000 description 6
- 206010017076 Fracture Diseases 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- 241000167854 Bourreria succulenta Species 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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- 239000011159 matrix material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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Abstract
It is a kind of that swollen oil gas field yield-increasing technology is pressed based on electrohydraulic effect and rock, comprising: (1) that flash driving source acts on target reservoir；(2) reservoir rock stress characteristics real-time detection；(3) according to reservoir rock stress characteristics, swollen nonuniformity coefficient is most preferably pressed in selection；Pulse source strength is controlled, reservoir maximum principal stress is made to be greater than the half of compressive strength of rock；(4) control high energy pulse wave-amplitude be superimposed time delay, action time of the extension reservoir rock under optimum stress nonuniformity coefficient.Realize that rock stress state controls using the superposition of high-energy shock wave；(5) reservoir rock is chronically at the swollen state of pressure, increases rock fracture tendency, improves permeability, realize environmentally friendly volume increase.This method is using the controllable electric pulse of continuous high-energy as driving source, according to reservoir rock stress -- strain regime automatic adjusument pulse amplitude be superimposed time delay, press swollen characteristic to establish resource-conserving, environmentally friendly oil gas field yield-increasing technology using electrohydraulic effect and rock.
Description
Technical field
The invention belongs to unconventional shale oil gas fields, are specifically related to a kind of based on electrohydraulic effect and the swollen characteristic of rock pressure
Improve the method for shale oil and gas reservoir physical property.
Background technique
The shale oil gas in China is resourceful, the marine bed of the Sichuan Basin and periphery, accumulative to verify the storage of shale gas geology
Measure 7643 billion cubic meters.Wherein, shale gas field in Fuling Chongqing's is accumulative verifies 6008 billion cubic meter of oil in place, becomes except North America
Maximum shale gas field.Chinese shale gas basic geology complicated condition, shale gas exploration and development face many difficulties and challenge, but
In the case where shale is distributed the advantages such as wide, series of strata are more, shale gas stock number is big, Chinese shale gas development has bright prospects.
Chinese Geological condition is intricate, particularly evident in terms of structural evolution, depositional environment, thermal evolution, this
So that the shale oil-gas formation of Chinese different geographical, there are many differences for enrichment.Chinese shale gas marine facies shale evolution level
It is higher, tectonic activity is stronger；Terrestrial facies shale evolution level is lower, distribution heterogeneity is stronger, and effective exploitation needs specific aim skill
Art；The problems such as water resource and environmental protection are also faced in exploitation need to reduce cost using applicable technology.
Blowhole is the key parameter for storing the important space of oil gas and determining free Gas content.According to statistics, have average
50% or so shale gas is stored in shale matrix pores.Reservoir micro-fractures include artificial splitting in underground original fracture and later period
Seam can be shale oil air lift for sufficient reservoir space, migration pathway, can more effectively improve shale oil and gas production.In agensis
In the case of crack, shale penetrating power is very low.
Rock is under certain uneven action of compressive stress of three axis, and volume increases, while porosity and permeability also increases,
Intensity decline.Using the swollen characteristic of the pressure of rock, change driving source amplitude -- time relationship, can control compacting and loosens deformation
Ratio extends the big positive number time of Stress non-homogeneity coefficient, impulse compaction validity can be improved；Extend Stress non-homogeneity coefficient
Relaxation effect can be improved for the small positive number time.
Current pressure is swollen, and loosening yield-increasing technology is exploded using multiple medicine packet explosive by certain time interval, is superimposed using blast wave
The swollen condition of pressure is generated to meet rock.However the shock wave energy that explosive generates is uncontrollable, and cannot uniformly act on set
Guan Shang easily damages casing.And the pollutant generated in blast process causes to seriously affect to environment, income is little.
High pressure strong electrical field is by liquid, and since huge energy abrupt release is in discharge channel, the liquid in channel is just
Rapid vaporization is expanded and is set off an explosion.Using the continuous high-energy controllable electric pulse excitation source of this characteristic development, effectively facilitating
While rock pressure is swollen, economize on resources, safety and environmental protection.
The advantages of present invention combines Pulse Power Techniques and rock to press swollen yield-increasing technology for the first time both at home and abroad, device is according to reservoir
Rock stress -- strain regime automatic adjusument pulse amplitude be superimposed time delay, utilize electrohydraulic effect and rock that swollen characteristic is pressed to establish
Resource-conserving, environmentally friendly oil gas field yield-increasing technology have the excellent speciality such as low pollution, low energy consumption.For the storage of shale oil gas
Layer, which improves, provides new technique direction.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of based on electrohydraulic effect and rock
Press swollen oil gas field yield-increasing technology.It can effectively increase rock fracture tendency, promote the development of reservoir gap, improve permeability,
Realize environmental harmony, friendly volume increase.
The technical solution of the invention is as follows: it is this that swollen oil gas field yield-increasing technology is pressed based on electrohydraulic effect and rock,
The following steps are included:
(1) flash driving source acts on target reservoir；
(2) reservoir rock stress characteristics real-time detection；
(3) according to reservoir rock stress characteristics, swollen nonuniformity coefficient is most preferably pressed in selection；Pulse source strength is controlled, reservoir is made
Maximum principal stress is greater than the half of compressive strength of rock；
(4) the high energy pulse wave-amplitude that control electrohydraulic effect is formed be superimposed time delay, extension reservoir rock is in optimum stress
Action time under nonuniformity coefficient.Realize that rock stress state controls using the superposition of high-energy shock wave；
(5) reservoir rock is chronically at the swollen state of pressure, increases rock fracture tendency, promotes the development of reservoir gap, improves and seep
Saturating rate realizes environmental harmony, friendly volume increase.
In addition, pressing swollen oil gas field increasing device, including electricity based on electrohydraulic effect and rock the present invention also provides a kind of
Pulse excitation source, pulse control unit, energy-storage units, stress state detection unit are sealed in steel pipe, pass through head harness, well logging
Cable is connected with the control device on oil/gas well.
Embodiments of the present invention have the advantages that
(1) the advantages of present invention combines Pulse Power Techniques and rock to press swollen yield-increasing technology for the first time both at home and abroad, with continuous high
Controllably the stress state of rock can be controlled by the superposition of impulse wave as driving source by electric pulse, realize and press swollen volume increase.
(2) rock is in complicated stress -- strain regime, gravity, tectonic stress, saturation fluid item under field conditions (factors)
Part and geometry can have an impact it.The present apparatus itself includes Rock in Well stress state real-time detecting system, according to
Reservoir rock stress -- strain regime automatic adjusument pulse amplitude be superimposed time delay, utilize electrohydraulic effect and rock to press swollen characteristic
Establish resource-conserving, environmentally friendly oil gas field yield-increasing technology.The technology can reduce shale oil and gas reservoir plasticity and toughness,
Increase reservoir brittle fracture tendency, promote the development of shale oil and gas reservoir micro chink, improving shale oil/gas well cylinder, nearby reservoir seeps
Saturating rate achievees the purpose that shale oil/gas well reservoir improves, stable yields is increased production.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is according to the present invention a kind of to press swollen oil gas field yield-increasing technology method flow based on electrohydraulic effect and rock
Figure.
Fig. 2 is according to the present invention a kind of to press swollen oil gas field increasing device design principle based on electrohydraulic effect and rock
Figure.
Fig. 3 is according to the present invention a kind of to press swollen oil gas field increasing device figure based on electrohydraulic effect and rock.Including electricity
Pulse excitation source (7), pulse control unit (6), energy-storage units (5), stress state detection unit (4) are sealed in steel pipe, are led to
Cross head harness (3), logging cable (2) is connected with the control device (1) on oil/gas well.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in figure 3, swollen oil gas field increasing device is pressed based on electrohydraulic effect and rock the present invention provides a kind of, including
Electric pulse driving source (7), pulse control unit (6), energy-storage units (5), stress state detection unit (4) are sealed in steel pipe,
It is connected by head harness (3), logging cable (2) with the control device (1) on oil/gas well.
According to above-mentioned apparatus, as depicted in figs. 1 and 2, one kind is provided in the present invention based on electrohydraulic effect and rock pressure
Swollen oil gas field yield-increasing technology method comprising following steps:
(1) flash driving source acts on target reservoir；
(2) reservoir rock stress characteristics real-time detection；
(3) according to reservoir rock stress characteristics, swollen nonuniformity coefficient is most preferably pressed in selection；Pulse source strength is controlled, reservoir is made
Maximum principal stress is greater than the half of compressive strength of rock；
(4) the high energy pulse wave-amplitude that control electrohydraulic effect is formed be superimposed time delay, extension reservoir rock is in optimum stress
Action time under nonuniformity coefficient.Realize that rock stress state controls using the superposition of high-energy shock wave；
(5) reservoir rock is chronically at the swollen state of pressure, increases rock fracture tendency, promotes the development of reservoir gap, improves and seep
Saturating rate realizes environmental harmony, friendly volume increase.
The advantages of this method combines Pulse Power Techniques and rock to press swollen yield-increasing technology for the first time both at home and abroad, can with continuous high-energy
Electric pulse is controlled as driving source, the stress state of rock is controlled by the superposition of impulse wave, realizes and presses swollen volume increase.With low dirt
The excellent speciality such as dye, low energy consumption.
Device itself includes Rock in Well stress state real-time detecting system, according to reservoir rock stress -- and strain regime is certainly
Adapt to adjust pulse amplitude be superimposed time delay, establish resource-conserving, environmental-friendly using the swollen characteristic of electrohydraulic effect and rock pressure
Type oil gas field yield-increasing technology.The technology can reduce shale oil and gas reservoir plasticity and toughness, increase reservoir brittle fracture tendency, promote
The development of form advance shale oil gas reservoir micro chink improves shale oil/gas well cylinder reservoir permeability nearby, reaches shale oil/gas well reservoir
Improve, the purpose of stable yields volume increase.
In addition, driving source is the High Voltage pulse excitation source based on electrohydraulic effect, amplitude, superposition in the step (1)
Frequency is controllable.
In addition, rock stress Characteristics Detection is underground real-time monitoring, real compared to after spot sampling in the step (2)
Room analysis is tested, its complicated stress -- strain regime under field conditions (factors) is preferably remained.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form, appoint
What is to the above embodiments according to the technical essence of the invention any simply to repair without departing from technical solution of the present invention content
Change, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (4)
1. a kind of press swollen oil gas field yield-increasing technology based on electrohydraulic effect and rock, it is characterised in that: itself the following steps are included:
(1) flash driving source acts on target reservoir；
(2) reservoir rock stress characteristics real-time detection；
(3) according to reservoir rock stress characteristics, swollen nonuniformity coefficient is most preferably pressed in selection；Pulse source strength is controlled, keeps reservoir maximum
Principal stress is greater than the half of compressive strength of rock；
(4) the high energy pulse wave-amplitude that control electrohydraulic effect is formed be superimposed time delay, extension reservoir rock is uneven in optimum stress
Action time under even coefficient.Realize that rock stress state controls using the superposition of high-energy shock wave；
(5) reservoir rock is chronically at the swollen state of pressure, increases rock fracture tendency, promotes the development of reservoir gap, improves permeability,
Realize environmental harmony, friendly volume increase.
2. it is according to claim 1 it is a kind of swollen oil gas field yield-increasing technology is pressed based on electrohydraulic effect and rock, feature exists
In: in the step (1), driving source is the High Voltage pulse excitation source based on electrohydraulic effect, amplitude, superposition frequency
Control.
3. shale oil gas ultrasonic resonance impact collaboration yield-increasing technology according to claim 1, it is characterised in that: the step
(2) in, rock stress Characteristics Detection is that underground real-time monitoring is preferably remained compared to lab analysis after spot sampling
Its complicated stress -- strain regime under field conditions (factors).
4. a kind of press swollen oil gas field increasing device based on electrohydraulic effect and rock as described in claim 1, which is characterized in that
Steel pipe is sealed in including electric pulse driving source (7), pulse control unit (6), energy-storage units (5), stress state detection unit (4)
In, it is connected by head harness (3), logging cable (2) with the control device (1) on oil/gas well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834944.1A CN110397429B (en) | 2019-09-05 | 2019-09-05 | Oil-gas field production increasing technology based on hydro-electric effect and rock pressure expansion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834944.1A CN110397429B (en) | 2019-09-05 | 2019-09-05 | Oil-gas field production increasing technology based on hydro-electric effect and rock pressure expansion |
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| CN110397429A true CN110397429A (en) | 2019-11-01 |
| CN110397429B CN110397429B (en) | 2020-06-30 |
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| CN201910834944.1A Active CN110397429B (en) | 2019-09-05 | 2019-09-05 | Oil-gas field production increasing technology based on hydro-electric effect and rock pressure expansion |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU407033A1 (en) * | 1971-12-31 | 1975-09-15 | Раменское отделение Всесоюзного научно-исследовательского института геофизических методов разведки | Device for fracturing the well pressure of powder gases |
| CN1125472A (en) * | 1993-04-29 | 1996-06-26 | 克宁索有限公司 | Acidising underground reservoirs |
| CN106382108A (en) * | 2016-10-21 | 2017-02-08 | 河南神华能源工程有限公司 | Fracturing and blockage-removal production increase method for oil-gas well based on CO2 gas phase fracturing technique |
-
2019
- 2019-09-05 CN CN201910834944.1A patent/CN110397429B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU407033A1 (en) * | 1971-12-31 | 1975-09-15 | Раменское отделение Всесоюзного научно-исследовательского института геофизических методов разведки | Device for fracturing the well pressure of powder gases |
| CN1125472A (en) * | 1993-04-29 | 1996-06-26 | 克宁索有限公司 | Acidising underground reservoirs |
| CN106382108A (en) * | 2016-10-21 | 2017-02-08 | 河南神华能源工程有限公司 | Fracturing and blockage-removal production increase method for oil-gas well based on CO2 gas phase fracturing technique |
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