CN107558980A - A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam - Google Patents
A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam Download PDFInfo
- Publication number
- CN107558980A CN107558980A CN201710586483.1A CN201710586483A CN107558980A CN 107558980 A CN107558980 A CN 107558980A CN 201710586483 A CN201710586483 A CN 201710586483A CN 107558980 A CN107558980 A CN 107558980A
- Authority
- CN
- China
- Prior art keywords
- low
- density
- seam
- fracture
- diverting agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Biological Depolymerization Polymers (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam, in man-made fracture deep rapid accumulation, forms interim bridge blinding to control the long extension of oil gas field reservoir man-made fracture seam, and realize the method that the lateral intrinsic fracture of man-made fracture is opened.The complex fracture network system that the process is mutually linked up by forming major fracture in pressing crack construction with a plurality of natural microcrack, expands oil well draining scope, reaches and employ lateral remaining oil, improve oil well waterflooding effect, improve well yield.The technical process strong operability, cost is relatively low, oil field development remarkable benefit, realize the unlatching and extension of the lateral intrinsic fracture of major fracture, and the intrinsic fracture of expansion is supported by proppant, the complicated Fracture System that major fracture is communicated with each other with a plurality of intrinsic fracture is formed, expands the lateral drainage area of oil well, the displacement radius of well is reduced, establishes branch seam system and the driving system of well.
Description
Technical field
The present invention relates to In Oil Field Exploration And Development underground work technical field, and in particular to a kind of low-density, which is temporarily blocked up, suppresses seam length
Extend fracturing process, employ lateral remaining oil for extra-low permeability, extra-low-permeability reservoir, improve well yield.
Background technology
With the propulsion of development process, Changqing oilfields part extra-low permeability, extra-low-permeability reservoir have stepped into mid-later development phase,
Influenceed by factors such as reservoir properties are poor, intrinsic fracture developments, it is main to recovery percent of reserves is higher, plane residual that oil field development faces crack
The problem of oily main lateral and lateral oilwell displacement system for being enriched in crack is difficult to set up, make the draining of protoplast's work Crack Control
In the range of crude oil cannot effectively supplement, and current multiple fracturing technique is due to technology and the limitation of cost, volume increase effect
Fruit is not notable.It is mainly manifested in：When limited by existing well pattern condition, low oil price is challenged, volume fracturing technology is easily made
Communicated with each other into adjacent oil well, the long increase space of seam is limited, and input-output ratio is relatively low, and the investment payback time is longer；Second, conventional weight
Multiple fracturing technique is only capable of realizing and old crack is refilled, and improves the flow conductivity in seam, fail to realize expand drainage area and
Change the purpose of original displacement system, Residual effect of measure fruit is poor, and the measure term of validity is short；Third, the temporarily stifled pressure break skill implemented early stage
Art, due to the rigid larger (real density of diverting agent density>2.0g/cm3), chemical temporary blocking agent meet water heating easily bonding unite, press
It is poor to split liquid solid-carrying performance, diverting agent fed distance in crack is shorter, it is impossible to realize the temporarily stifled of crack deep.Therefore, it is how real
Now old well employs the low cost strategy of lateral remaining oil, suppresses the extension of fracture length, promotes lateral oily effective displacement system to build
It is vertical, it is significant to improve well yield.
The content of the invention
Suppression seam length, which is temporarily blocked up, present invention aims at a kind of low-density of offer extends fracturing process, it is fast in man-made fracture deep
Speed accumulation, interim bridge blinding is formed to control the long extension of oil gas field reservoir man-made fracture seam, and realize that man-made fracture is laterally natural
The method that crack is opened.The complexity that the process is mutually linked up by forming major fracture in pressing crack construction with a plurality of natural microcrack
Fracture network system, expand oil well draining scope, reach and employ lateral remaining oil, improve oil well waterflooding effect, improve individual well production
Amount, solve extra-low permeability oil reservoirs, the problem of the lateral remaining oil producing of extra-low-permeability reservoir mid-later development phase.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam, comprises the following steps：
1) the low liquid replaced out in pit shaft is carried out using active water, then set packer；
2) slippery water is injected, opens man-made fracture early stage；
3) first order low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working liquid, then will
Hybrid working liquid injection man-made fracture deep, rapid accumulation simultaneously form bridge blinding, if net pressure reaches more than 3MPa in lifting seam, reach
The condition that intrinsic fracture is opened is opened, continues step 5)；If net pressure does not reach more than 3MPa in lifting seam, step is carried out
4)；Wherein, fiber fracturing liquid is made by procedure below：Degradable poly lactic acid resin fiber is added in guanidine that matrix liquid
It is made；
4) second level low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working liquid, note again
Enter man-made fracture deep, and rapid accumulation and form bridge blinding, more than net pressure 3MPa in lifting seam, open intrinsic fracture；If
Net pressure in seam can not be lifted and reach more than 3MPa, repeat step 4) until net pressure reaches more than 3MPa in lifting seam；
5) slippery water is injected as prepad fluid to the intrinsic fracture of unlatching, expands the long extension of intrinsic fracture seam；
6) mixed liquor that the new branch seam injection to formation is made up of slippery water and proppant, the sand proportion concentration of mixed liquor are in
The increase of 3-5 sections staged, and sand specific concentration≤11%, fill the intrinsic fracture of expansion；
7) main pressing crack construction is carried out.
Further improve of the invention is that the operational discharge capacity of active water is 0.4-0.5m in step 1)3/min；With 0.5-
1.0m3/ min operational discharge capacity set packer.
Further improve of the invention is, with 1.0-2.0m in step 2)3/ min operational discharge capacity injection slippery water, and
And the injection rate of slippery water is 10-20m3。
Of the invention further improve be, in step 3) in fiber fracturing liquid degradable poly lactic acid resin fiber matter
Amount concentration is 0.6%-0.8%.
Further improve of the invention is that your mass concentration of matrix liquid of guanidine is 0.3%-0.4% in step 3).
The present invention, which further improves, to be, first order low-density diverting agent mixture in hybrid working liquid in step 3)
Mass concentration is 0.2%-0.8%；First order low-density diverting agent mixture is made by procedure below：It is 1.5- by particle diameter
2mm, 2-3mm, 3-6mm low-density diverting agent, it is 3 according to mass ratio：3：2 mixing, obtain first order low-density diverting agent and mix
Compound, and the density of low-density diverting agent is 1.1-1.3g/cm3。
The present invention, which further improves, to be, low-density diverting agent mixture in the second level in hybrid working liquid in step 4)
Mass concentration is 0.2%-0.8%；Second level low-density diverting agent mixture is made by procedure below：It is 1.5- by particle diameter
2mm, 2-3mm, 3-6mm low-density diverting agent, it is 2 according to mass ratio：3：After 3 mixing, obtain second level low-density and temporarily block up
Agent composition, and the density of low-density diverting agent is 1.1-1.3g/cm3。
Further improve of the invention is that the amount of injection slippery water is 20-30m in step 5)3。
Further improve of the invention is, with 1.0-6.0m in step 6)3/ min discharge capacity liquid enters mixed liquor.
Further improve of the invention is that the particle diameter of proppant is 40-100 mesh in step 6).
Compared with prior art, beneficial effects of the present invention：It is provided by the invention this based on the suppression of low-density diverting agent
The fracturing technology method of the long extension of seam is a technique side for being combined biodegradable fiber, low-density diverting agent with refracturing
Method, it is proposed that the method that net pressure in lifting seam is temporarily blocked up by fiber fracturing liquid+low-density diverting agent, emphasis solve conventional rigid
Larger (the real density of diverting agent density>2.0g/cm3), the problem of sedimentation is fast, fed distance is short, by the way that fiber is temporary with low-density
The blocking agent network structure to be formed that interacts is transported to the deep of man-made fracture early stage, and rapid accumulation forms the temporary bridge of low leak-off
It is stifled, the certain net-head of interior generation is stitched in crack, realizes the unlatching and extension of the lateral intrinsic fracture of major fracture, and pass through small particle
Proppant is supported to the intrinsic fracture of expansion, forms the complicated crack system that major fracture is communicated with each other with a plurality of intrinsic fracture
System, expand the lateral drainage area of oil well, reduce the displacement radius of well, establish branch seam system and the driving system of well.
Boosting 3.5-8.3MPa is temporarily blocked up in 5 mouthfuls of wells of field test, bottom pressure monitoring, and net pressure reaches more than 5MPa in seam, has reached side
The mechanical condition opened to intrinsic fracture；Underground micro-seismic monitoring shows that fracture length is under control, crack bandwidth obtain compared with
It is big to improve；Average individual well increases day by day oily 1.7t after measure, is 1.9 times of same district adjacent wells using conventional pressure break, achieves preferable effect.Together
When the technical process strong operability, cost is relatively low, can increase substantially oil field productivity effect.
Brief description of the drawings
Fig. 1 is that low-density temporarily blocks up the floor map for suppressing the old long extension of crack seam.
Fig. 2 is that test well low-density temporarily blocks up the underground microseism top view for suppressing the old long extension of crack seam.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
The present invention is to optimize diverting agent according to reservoir property, kind of liquid, operational discharge capacity and mechanical properties of rock etc.
(density 1.1g/cm3-1.3g/cm3) grain size specification (1.5mm-6mm), add opportunity (early stage man-made fracture open after inject
10-20m3) and infusion parameter.The hybrid working liquid prepared by the quick infusion of ground sand blender, the hybrid working liquid is by can
Degraded polylactic resin fiber, linear glue and low-density diverting agent composition, above-mentioned low-density diverting agent is by the following method
It is made：By weight percentage, by PLA 60%-85%, starch 5-20%, pla-pcl 5-10%, solubilizer 2-5% with
And after toughener 2-5% is weighed and is blended, extrusion moulding, the low-density diverting agent particles of 1.5-6mm particle diameters is prepared into, wherein increasing
Tough dose is butadiene-styrene rubber, and solubilizer is glycerine, and the particle diameter for specifically obtaining diverting agent particle is 1.5-2mm, 2-3mm, 3-6mm, and
And the real density of the diverting agent particle of every kind of particle diameter is 1.1g/cm3-1.3g/cm3；In the present invention when in use, by three kinds of differences
The diverting agent of particle diameter uses after being mixed；Degradable poly lactic acid resinae fiber is researched and developed according to Changqing oilfields reservoir characteristics,
It is prepared by the following method：By material to adapt to the degradable poly lactic acid resin material of 60~90 DEG C of formation temperature, it is made into be measured
The chopped silk that length is 10mm is made in sample and then shearing.Using the low density feature of low-density diverting agent, increase diverting agent exists
Fed distance in crack, while the network structure that fiber fracturing liquid is formed, reduce further the subsidence velocity of diverting agent, fine
The double action of fracturing fluid and low-density diverting agent is tieed up, diverting agent (as shown in I in Fig. 1) migration for promoting fiber fracturing liquid to wrap up
To the end in crack, and formed in the end in crack and temporarily blocked up, net pressure in the seam of lifting crack, reach the vertical intrinsic fracture in crack
The condition that (as shown in II in Fig. 1) is opened, form the fracture network of complexity, realize the long extension of control critical eigenvalue seam (Fig. 1 top right plots with
Fig. 1 bottom-right graphs seam length is substantially suitable), increase the unlatching of vertical intrinsic fracture, expanding the purpose of drainage area, (Fig. 1 top right plots are temporary
Area included by stifled front and rear drainage boundary, the area included by the temporarily stifled front and rear micro-seismic event borders of Fig. 2).Specific pressure break mistake
Journey following steps：
First, according to Changqing oilfields extra-low permeability oil reservoirs, extra-low-permeability reservoir reservoir characteristic, kind of liquid, operational discharge capacity
The mechanical condition opened with the grain size specification and intrinsic fracture of the optimization low-density diverting agent such as mechanical properties of rock and temporarily stifled boosting
Lower limit, using the working solution of degradable poly lactic acid resin fiber+linear glue composition, carry the diverting agent of dimension extremely
Early stage man-made fracture deep, realize temporarily stifled boosting.Fracturing process comprises the following steps：
1) by guanidine, your glue is added to the water, and prepares the guanidine that matrix liquid that mass concentration is 0.3%-0.4%；
2) the degradable poly breast using ready guanidine matrix liquid in step 1) as mother liquor mass concentration 0.6%-0.8%
Acid resin fiber fracturing fluid, as carrying liquid；
3) using active water with 0.4-0.5m3/ min operational discharge capacity carries out the low liquid replaced out in pit shaft；
4) with 0.5-1.0m3/ min operational discharge capacity set packer, it is ensured that subsequent construction liquid enters stratum with sand amount；
5) with 1.0-2.0m3/ min operational discharge capacity injection slippery water 10-20m3, open man-made fracture early stage；
6) it is 3 according to mass ratio by the low-density diverting agent that particle diameter is 1.5-2mm, 2-3mm, 3-6mm：3：2 mixing, are obtained
To first order low-density diverting agent mixture, 150-200Kg first order low-density diverting agent mixtures are added in step 2)
In the degradable poly lactic acid resinae fiber fracturing liquid prepared, wherein, first order low-density mixes the mass concentration of diverting agent
For 0.2%-0.8%, be then injected into man-made fracture deep, rapid accumulation simultaneously forms bridge blinding, lifting seam in net pressure up to 3MPa with
On, reach the condition that intrinsic fracture is opened of opening, continue step 8)；If temporarily stifled boosting is not up to 3MPa, step is carried out
7)；
7) it is 2 according to mass ratio by the low-density diverting agent that particle diameter is 1.5-2mm, 2-3mm, 3-6mm：3：3 mixing
Afterwards, second level low-density diverting agent mixture is obtained, 50-100Kg second level low-density diverting agent mixture is added to step
2) in the fiber fracturing liquid prepared in, wherein, the mass concentration of second level low-density diverting agent mixture is 0.2%-
0.8%, man-made fracture deep is re-injected, rapid accumulation simultaneously forms bridge blinding, more than net pressure 3MPa in lifting seam, opens natural
Crack；If can not lift net pressure in seam reaches more than 3MPa, repeat step 7) until net pressure reaches more than 3MPa in lifting seam.
8) slippery water 20-30m is injected to the intrinsic fracture of unlatching3As prepad fluid, expand the long extension of intrinsic fracture seam；
9) with 1.0-6.0m3/ min discharge capacity forms to the new branch seam injection slippery water of formation and the proppant of 40-100 mesh
Mixed liquor, the sand proportion concentration (volumetric concentration) of mixed liquor is in the increase of 3-5 sections staged, i.e., using 3 sand proportion concentration simultaneously
And sand proportion concentration gradually increases, maximum sand specific concentration≤11%.The sand being carried by under different displacements is than different, high discharge capacity energy
Carry high sand specific concentration, be only capable of carrying low sand ratio during low discharge capacity；The addition of sand specific concentration and mixed liquor is according to reservoir fine fisssure
Depending on the density of seam, reservoir difference can not be quantified；The specific material of proppant is depending on reservoir closure stress, long celebrating at present
Proppant fills the day of expansion to adapt to the quartz sand of low closure stress or adapting to the haydite of high closure stress used by oil field
Right crack；Wherein, slippery water is low viscosity liquid, play conveying proppant and in crack quick leak-off purpose.
10) main pressing crack construction is carried out.
Used in the present invention low-density diverting agent be according to the demand of Changqing oilfields sandstone oil reservoir be process with polymerization
High intensity based on thing composite, rigid, degradable diverting agent.
Low-density diverting agent is to process rational grain size specification according to the width of crack dynamic seam and the theoretical selection of bridge blinding, can be added
The diverting agent particle size range of work is 1.5mm-6.0mm, and mixed proportion can be adjusted according to temporary stifled boost effect.
The low-density diverting agent used may be implemented in week age completely under the conditions of experimental temperature is 60 DEG C of clear water
Degraded.
The lower limit of fine pressure force value in the seam of crack is lifted in the present invention, fine pressure force value and discharge capacity in construction are opened by intrinsic fracture
What the difference of caused fine pressure force value determined.
Illustrated below by specific embodiment.
Embodiment 1
1) the guanidine that matrix liquid that mass concentration is 0.3% is prepared；
2) the degradable poly lactic acid resin fiber pressure using ready guanidine matrix liquid in step 1) as mother liquor 0.8%
Liquid is split, as carrying liquid；
3) using active water with 0.4-0.5m3/ min operational discharge capacity carries out the low liquid replaced out in pit shaft；
4) with 0.5-1.0m3/ min operational discharge capacity set packer, it is ensured that subsequent construction liquid enters stratum with sand amount；
5) with 2.0m3/ min operational discharge capacity injection slippery water 10-20m3, open man-made fracture early stage；
6) it is 2mm by 150Kg mechanical fractions:3mm:4mm low-density diverting agent, it is 3 according to mass ratio：3：2 mixing,
And it is added to 0.4% mass concentration in the fiber fracturing liquid prepared in step 2), injection man-made fracture deep, quick heap
Accumulate and form bridge blinding, net pressure reaches more than 3MPa in lifting seam, opens intrinsic fracture；
7) slippery water 20m is injected to the intrinsic fracture of unlatching3As prepad fluid, expand the long extension of intrinsic fracture seam；
8) with 3.0m3/ min discharge capacity enters the proppant group of slippery water and 40-100 mesh to the new branch seam staged liquid of formation
Into mixed liquor, the sand proportion concentration (volumetric concentration) of mixed liquor is followed successively by 7%-9%-11%, fills the intrinsic fracture of expansion；
9) main pressing crack construction is carried out.
In said process, it is first determined the horizontal two-phase stress difference of different reservoir, and under the conditions of the stress difference naturally
The pressure differential that crack is opened, the pressure value is to form the critical value for a plurality of microcrack communicated with each other with major fracture, and this is temporary
Fine pressure force value standard in the crack seam that deblocking technology requirement must reach；Then according to the dense of selected operational discharge capacity and working solution type
Degree calculates the fine pressure force value of construction stage, and boosting is temporarily blocked up by low-density and reaches horizontal two-phase stress difference and has selected hydraulic fluid
The difference between caused fine pressure force value under operational discharge capacity is specified, forms a plurality of microcrack communicated with each other with major fracture.
Low-density, which is temporarily blocked up, suppresses the long fracturing technique of seam in G**-** wells expansion field test, the flat two-phase stress difference of the well water
For 6.5MPa, net pressure needed for unlatching intrinsic fracture is 4-6MPa, and degradable poly lactic acid resinae is used using 0.6% in construction
The working solution of the linear glue+4mm low-density diverting agent composition of fiber+0.3%, is temporarily blocked up, ground construction to man-made fracture early stage
Pressure rises to 25.2MPa by 18.4MPa, and pressure rises 6.8MPa, and bottom pressure rises to 33.5MPa, pressure by 26.5MPa
Rise 7MPa, reached the condition of intrinsic fracture unlatching, form complicated seam net；Underground micro-seismic monitoring shows that fracture length obtains
Control, crack bandwidth obtain larger raising；Day oil-producing 2.6t after the well measure, increase day by day oily 1.8t, compared with same district adjacent wells using conventional pressure
Split the well oil that increases day by day and be higher by 1.0t, effect of increasing production is obvious.
Embodiment 2
1) the use of operational discharge capacity is 0.4m3/ min active water carries out the low liquid replaced out in pit shaft, then with 0.5m3/
Min operational discharge capacity set packer；
2) with 2.0m3/ min operational discharge capacity injection slippery water 10m3, open man-made fracture early stage；
3) it is 3 according to mass ratio by the low-density diverting agent that particle diameter is 1.5mm, 3mm, 6mm：3：2 mixing, obtain first
Level low-density diverting agent mixture, first order low-density diverting agent mixture is added in fiber fracturing liquid, forms mixing work
Make liquid, the mass concentration of first order low-density diverting agent mixture is 0.2% in hybrid working liquid；Then hybrid working liquid is noted
Enter man-made fracture deep, rapid accumulation simultaneously forms bridge blinding, if net pressure reaches more than 3MPa in lifting seam, reaches unlatching intrinsic fracture
The condition of unlatching, continues step 5)；If net pressure does not reach more than 3MPa in lifting seam, step 4) is carried out；Wherein, fiber
Fracturing fluid is made by procedure below：Degradable poly lactic acid resin fiber is added in guanidine that matrix liquid and is made, and it is fine
The mass concentration for tieing up degradable poly lactic acid resin fiber in fracturing fluid is 0.6%；Your matrix liquid of guanidine is added by your glue by guanidine
Enter into water and be made, and the mass concentration of guanidine that matrix liquid is 0.3%.
4) second level low-density diverting agent mixture is added in the fiber fracturing liquid prepared in step 2), wherein,
It is 2 according to mass ratio by the low-density diverting agent that particle diameter is 1.5mm, 3mm, 6mm：3：After 3 mixing, it is low close to obtain the second level
Spend diverting agent mixture.The mass concentration of low-density diverting agent mixture is 0.2%, is then injected into man-made fracture deep, quickly
Accumulate and form bridge blinding, more than net pressure 3MPa in lifting seam, open intrinsic fracture；If net pressure in seam can not be lifted to reach
More than 3MPa, repeat step 4) until net pressure reaches more than 3MPa in lifting seam.
5) 20m is injected to the intrinsic fracture of unlatching3Slippery water expands the long extension of intrinsic fracture seam as prepad fluid；
6) with 1.0m3/ min discharge capacity is to proppant of the new branch seam injection of formation by slippery water and particle diameter for 40-100 mesh
The mixed liquor of composition, the sand proportion concentration of mixed liquor is in 3-5 sections staged increase (sand proportion concentration 3%-5%-7%), filling
The intrinsic fracture of expansion；
7) main pressing crack construction is carried out.
Embodiment 3
1) the use of operational discharge capacity is 0.5m3/ min active water carries out the low liquid replaced out in pit shaft, then with 1m3/min
Operational discharge capacity set packer；
2) with 1.0m3/ min operational discharge capacity injection slippery water 20m3, open man-made fracture early stage；
3) it is 3 according to mass ratio by the low-density diverting agent that particle diameter is 2mm, 2mm, 3mm：3：2 mixing, obtain the first order
Low-density diverting agent mixture, first order low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working
Liquid, the mass concentration of first order low-density diverting agent mixture is 0.5% in hybrid working liquid；Then hybrid working liquid is injected
Man-made fracture deep, rapid accumulation simultaneously form bridge blinding, if net pressure reaches more than 3MPa in lifting seam, reach unlatching intrinsic fracture and open
The condition opened, continues step 5)；If net pressure does not reach more than 3MPa in lifting seam, step 4) is carried out；Wherein, fiber pressure
Liquid is split to be made by procedure below：Degradable poly lactic acid resin fiber is added in guanidine that matrix liquid and is made, and fiber
The mass concentration of degradable poly lactic acid resin fiber is 0.7% in fracturing fluid；Your matrix liquid of guanidine is added by your glue by guanidine
It is made into water, and the mass concentration of guanidine that matrix liquid is 0.3%.
4) second level low-density diverting agent mixture is added in the fiber fracturing liquid prepared in step 2), wherein,
It is 2 according to mass ratio by the low-density diverting agent that particle diameter is 2mm, 2mm, 3mm：3：After 3 mixing, second level low-density is obtained
Diverting agent mixture.The mass concentration of low-density diverting agent mixture is 0.5%, is then injected into man-made fracture deep, quick heap
Accumulate and form bridge blinding, more than net pressure 3MPa in lifting seam, open intrinsic fracture；If can not lift net pressure in seam reaches 3MPa
More than, repeat step 4) until net pressure reaches more than 3MPa in lifting seam.
5) 25m is injected to the intrinsic fracture of unlatching3Slippery water expands the long extension of intrinsic fracture seam as prepad fluid；
6) with 3.0m3/ min discharge capacity is to proppant of the new branch seam injection of formation by slippery water and particle diameter for 40-100 mesh
The mixed liquor of composition, the sand proportion concentration of mixed liquor is in 3-5 sections staged increase (sand proportion concentration 5%-7%-9%), filling
The intrinsic fracture of expansion；
7) main pressing crack construction is carried out.
Embodiment 4
1) the use of operational discharge capacity is 0.4m3/ min active water carries out the low liquid replaced out in pit shaft, then with 0.7m3/
Min operational discharge capacity set packer；
2) with 1.5m3/ min operational discharge capacity injection slippery water 15m3, open man-made fracture early stage；
3) it is 3 according to mass ratio by the low-density diverting agent that particle diameter is 2mm, 2mm, 5mm：3：2 mixing, obtain the first order
Low-density diverting agent mixture, first order low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working
Liquid, the mass concentration of first order low-density diverting agent mixture is 0.8% in hybrid working liquid；Then hybrid working liquid is injected
Man-made fracture deep, rapid accumulation simultaneously form bridge blinding, if net pressure reaches more than 3MPa in lifting seam, reach unlatching intrinsic fracture and open
The condition opened, continues step 5)；If net pressure does not reach more than 3MPa in lifting seam, step 4) is carried out；Wherein, fiber pressure
Liquid is split to be made by procedure below：Degradable poly lactic acid resin fiber is added in guanidine that matrix liquid and is made, and fiber
The mass concentration of degradable poly lactic acid resin fiber is 0.8% in fracturing fluid；Your matrix liquid of guanidine is added by your glue by guanidine
It is made into water, and the mass concentration of guanidine that matrix liquid is 0.4%.
4) second level low-density diverting agent mixture is added in the fiber fracturing liquid prepared in step 2), wherein,
It is 2 according to mass ratio by the low-density diverting agent that particle diameter is 2mm, 2mm, 5mm：3：After 3 mixing, second level low-density is obtained
Diverting agent mixture.The mass concentration of low-density diverting agent mixture is 0.8%, is then injected into man-made fracture deep, quick heap
Accumulate and form bridge blinding, more than net pressure 3MPa in lifting seam, open intrinsic fracture；If can not lift net pressure in seam reaches 3MPa
More than, repeat step 4) until net pressure reaches more than 3MPa in lifting seam.
5) 30m is injected to the intrinsic fracture of unlatching3Slippery water expands the long extension of intrinsic fracture seam as prepad fluid；
6) with 6.0m3/ min discharge capacity is to proppant of the new branch seam injection of formation by slippery water and particle diameter for 40-100 mesh
The mixed liquor of composition, in the increase of 3-5 sections staged (being specially 7%-9%-11%), filling expands the sand proportion concentration of mixed liquor
Intrinsic fracture；
7) main pressing crack construction is carried out.
Boosting 3.5-8.3MPa is temporarily blocked up in 5 mouthfuls of wells of field test, bottom pressure monitoring, and net pressure reaches more than 5MPa in seam,
The mechanical condition that lateral intrinsic fracture is opened is reached；Underground micro-seismic monitoring shows that fracture length is under control, slit band
Width obtains larger raising；Average individual well increases day by day oily 1.7t after measure, is 1.9 times of same district adjacent wells using conventional pressure break, achieves preferably
Effect.The technical process strong operability simultaneously, cost is relatively low, can increase substantially oil field productivity effect.
For the present invention in man-made fracture early stage deep, rapid accumulation forms the interim bridge blinding of low leak-off, and interior produce is stitched in crack
Certain net-head, open and extend lateral intrinsic fracture, form the Fracture System of complexity, expand the lateral drainage area of oil well,
Establish effective displacement system.The technical process strong operability, cost is relatively low, oil field development remarkable benefit, solves conventional firm
Property larger (the real density of diverting agent density>2.0g/cm3) and chemical temporary blocking agent meet water or heating easily bonding unite, settle it is fast, defeated
Send apart from it is short the problem of, also solve extra-low permeability and extra-low-permeability reservoir employ the problem of lateral remaining oil.
Claims (10)
1. a kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that comprises the following steps：
1) the low liquid replaced out in pit shaft is carried out using active water, then set packer；
2) slippery water is injected, opens man-made fracture early stage；
3) first order low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working liquid, then will mixing
Working solution injection man-made fracture deep, rapid accumulation simultaneously form bridge blinding, if net pressure reaches more than 3MPa in lifting seam, reach unlatching
The condition that intrinsic fracture is opened, continues step 5)；If net pressure does not reach more than 3MPa in lifting seam, step 4) is carried out；
Wherein, fiber fracturing liquid is made by procedure below：Degradable poly lactic acid resin fiber is added in guanidine that matrix liquid and made
；
4) second level low-density diverting agent mixture is added in fiber fracturing liquid, forms hybrid working liquid, re-inject people
Work crack deep, and rapid accumulation forms bridge blinding, lifts more than net pressure 3MPa in seam, opens intrinsic fracture；If it can not carry
Rise net pressure in seam and reach more than 3MPa, repeat step 4) until net pressure reaches more than 3MPa in lifting seam；
5) slippery water is injected as prepad fluid to the intrinsic fracture of unlatching, expands the long extension of intrinsic fracture seam；
6) mixed liquor that the new branch seam injection to formation is made up of slippery water and proppant, the sand proportion concentration of mixed liquor is in 3-5
Section staged increase, and sand specific concentration≤11%, fill the intrinsic fracture of expansion；
7) main pressing crack construction is carried out.
2. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 1)
The operational discharge capacity of middle active water is 0.4-0.5m3/min；With 0.5-1.0m3/ min operational discharge capacity set packer.
3. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 2)
In with 1.0-2.0m3/ min operational discharge capacity injection slippery water, and the injection rate of slippery water is 10-20m3。
4. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 3)
The mass concentration of degradable poly lactic acid resin fiber is 0.6%-0.8% in middle fiber fracturing liquid.
5. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 3)
Your mass concentration of matrix liquid of middle guanidine is 0.3%-0.4%.
6. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 3)
The mass concentration of first order low-density diverting agent mixture is 0.2%-0.8% in middle hybrid working liquid；First order low-density is temporary
Blocking agent mixture is made by procedure below：Low-density diverting agent by particle diameter for 1.5-2mm, 2-3mm, 3-6mm, according to quality
Than for 3：3：2 mixing, obtain first order low-density diverting agent mixture, and the density of low-density diverting agent is 1.1-1.3g/
cm3。
7. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 4)
The mass concentration of second level low-density diverting agent mixture is 0.2%-0.8% in middle hybrid working liquid；Second level low-density is temporary
Blocking agent mixture is made by procedure below：Low-density diverting agent by particle diameter for 1.5-2mm, 2-3mm, 3-6mm, according to quality
Ratio is 2：3：After 3 mixing, second level low-density diverting agent mixture is obtained, and the density of low-density diverting agent is 1.1-
1.3g/cm3。
8. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 5)
The amount of middle injection slippery water is 20-30m3。
9. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step 6)
In with 1.0-6.0m3/ min discharge capacity liquid enters mixed liquor.
10. a kind of low-density according to claim 1, which is temporarily blocked up, suppresses the long extension fracturing process of seam, it is characterised in that step
6) particle diameter of proppant is 40-100 mesh in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710586483.1A CN107558980B (en) | 2017-07-18 | 2017-07-18 | Low-density temporary plugging crack length-extension-restraining fracturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710586483.1A CN107558980B (en) | 2017-07-18 | 2017-07-18 | Low-density temporary plugging crack length-extension-restraining fracturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107558980A true CN107558980A (en) | 2018-01-09 |
| CN107558980B CN107558980B (en) | 2020-05-08 |
Family
ID=60972834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710586483.1A Active CN107558980B (en) | 2017-07-18 | 2017-07-18 | Low-density temporary plugging crack length-extension-restraining fracturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107558980B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236259A (en) * | 2018-10-31 | 2019-01-18 | 西安科技大学 | A kind of contradictory fracturing process of adjustment water injection well plane water drive |
| CN109252844A (en) * | 2018-08-09 | 2019-01-22 | 古莱特科技股份有限公司 | A method of temporarily stifled turnaround fracture is realized using pressure difference polymerization diverting agent |
| CN109779592A (en) * | 2018-12-28 | 2019-05-21 | 中国石油天然气股份有限公司 | A kind of perforation press cracking method of the old well longitudinal direction Tapping Residual Oil of single sand body oil reservoir |
| CN109933845A (en) * | 2019-01-28 | 2019-06-25 | 西南石油大学 | A kind of unlatching range computation method of intrinsic fracture when temporarily stifled pressure break |
| CN110469308A (en) * | 2019-08-07 | 2019-11-19 | 北京九恒质信能源技术有限公司 | In a kind of straight well seam temporarily stall to fracturing experiments method |
| CN111350481A (en) * | 2020-04-17 | 2020-06-30 | 中国石油天然气集团有限公司 | Temporary plugging steering fracturing method among horizontal well clusters and in seams |
| CN111561300A (en) * | 2020-05-26 | 2020-08-21 | 中国石油天然气股份有限公司 | Method for improving water drive effect of water injection well of ultra-low permeability fractured reservoir |
| CN112302570A (en) * | 2020-10-26 | 2021-02-02 | 中国石油大学(北京) | Construction method and device based on temporary plugging of reservoir |
| CN112410001A (en) * | 2020-11-05 | 2021-02-26 | 中国石油天然气股份有限公司大港油田分公司 | Floating agent and high-strength floating agent partition plate process for controlling fracture cross-layer propagation |
| CN112943208A (en) * | 2021-01-21 | 2021-06-11 | 中国石油天然气股份有限公司 | Fracturing method for opening new crack by filling sand into crack |
Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815681A (en) * | 1972-05-24 | 1974-06-11 | Shell Oil Co | Temporarily plugging an earth formation with a transiently gelling aqueous liquid |
| US3860070A (en) * | 1973-12-13 | 1975-01-14 | Shell Oil Co | Aluminate-thickened well treating fluid and method of use |
| CN1566613A (en) * | 2003-06-18 | 2005-01-19 | 长庆石油勘探局工程技术研究院 | Hydraulic fracturing process for generating multiple fractures |
| CN101906292A (en) * | 2009-06-05 | 2010-12-08 | 中国石油天然气股份有限公司 | High-strength temporary blocking agent and preparation method thereof |
| CN102020984A (en) * | 2009-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | In-fissure diversion fracturing temporary blocking agent for low-permeability oilfield, and preparation method and application thereof |
| CN102925133A (en) * | 2012-10-16 | 2013-02-13 | 中国石油天然气股份有限公司 | Fracturing fluid for controlling extension of fracture and fracturing method |
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| CN103509542A (en) * | 2013-10-11 | 2014-01-15 | 北京国海能源技术研究院 | Biodegradable elastomeric temporary blocking agent and preparation method thereof |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber clearance |
| CN103788936A (en) * | 2013-11-08 | 2014-05-14 | 东方宝麟科技发展(北京)有限公司 | High-strength temporary blocking agent for oil and gas wells and preparation method and application thereof |
| CN104533375A (en) * | 2014-12-26 | 2015-04-22 | 中国石油天然气股份有限公司 | Natural fractured reservoir fracturing reformation method |
| CN104594870A (en) * | 2014-12-22 | 2015-05-06 | 中国石油天然气股份有限公司 | Fracturing stimulation method |
| CN105275442A (en) * | 2015-10-29 | 2016-01-27 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Old well re-transformation volume fracturing technology |
| CN105649594A (en) * | 2015-12-31 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for maintaining flow conductivity of seams near wellbore area |
| CN105649593A (en) * | 2015-12-31 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for maintaining flow conductivity of multi-slit fracturing seams in horizontal well section |
| CN105672970A (en) * | 2015-12-31 | 2016-06-15 | 中国石油天然气股份有限公司 | Method for realizing temporary plugging redirecting multiple crack fracturing inside horizontal well section |
| CN105756650A (en) * | 2016-03-28 | 2016-07-13 | 中国石油天然气股份有限公司 | Method for realizing staged fracturing of horizontal well by blocking channelling by adopting mixed temporary blocking agent |
| CN105927197A (en) * | 2016-04-27 | 2016-09-07 | 中国石油天然气股份有限公司 | Method for increasing production by old well temporary plugging volume fracturing repeated reconstruction in low permeability sandstone reservoir |
| CN105952430A (en) * | 2016-06-07 | 2016-09-21 | 中国石油天然气股份有限公司 | Volume fracturing and energy replenishing method for low-yield horizontal well in dense oil reservoir |
| CN106010492A (en) * | 2016-05-20 | 2016-10-12 | 重庆科技学院 | Degradable high-strength temporary blocking agent and preparation method thereof |
| CN106190095A (en) * | 2016-07-19 | 2016-12-07 | 郑州鑫源防磨耐材有限公司 | A kind of low-density and high-strength ceramic proppant and preparation method thereof |
| CN106194145A (en) * | 2016-09-27 | 2016-12-07 | 西南石油大学 | A kind of the most stifled multistage degree of depth network acid fracturing method |
| CN106382111A (en) * | 2015-07-28 | 2017-02-08 | 中国石油化工股份有限公司 | Method increasing shale gas fracturing crack complexity |
| CN106593389A (en) * | 2016-12-22 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for fracturing high-angle naturally-fractured oil reservoir by using permanent plugging agent |
| CN106750345A (en) * | 2017-01-05 | 2017-05-31 | 西安石油大学 | A kind of synthetic method of the degradable diversion agent of slippery water pressure break |
-
2017
- 2017-07-18 CN CN201710586483.1A patent/CN107558980B/en active Active
Patent Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815681A (en) * | 1972-05-24 | 1974-06-11 | Shell Oil Co | Temporarily plugging an earth formation with a transiently gelling aqueous liquid |
| US3860070A (en) * | 1973-12-13 | 1975-01-14 | Shell Oil Co | Aluminate-thickened well treating fluid and method of use |
| CN1566613A (en) * | 2003-06-18 | 2005-01-19 | 长庆石油勘探局工程技术研究院 | Hydraulic fracturing process for generating multiple fractures |
| CN101906292A (en) * | 2009-06-05 | 2010-12-08 | 中国石油天然气股份有限公司 | High-strength temporary blocking agent and preparation method thereof |
| CN102020984A (en) * | 2009-09-15 | 2011-04-20 | 中国石油天然气股份有限公司 | In-fissure diversion fracturing temporary blocking agent for low-permeability oilfield, and preparation method and application thereof |
| CN103306660A (en) * | 2012-03-13 | 2013-09-18 | 中国石油化工股份有限公司 | Shale gas reservoir hydraulic fracturing production increasing method |
| CN102925133A (en) * | 2012-10-16 | 2013-02-13 | 中国石油天然气股份有限公司 | Fracturing fluid for controlling extension of fracture and fracturing method |
| CN103509542A (en) * | 2013-10-11 | 2014-01-15 | 北京国海能源技术研究院 | Biodegradable elastomeric temporary blocking agent and preparation method thereof |
| CN103788936A (en) * | 2013-11-08 | 2014-05-14 | 东方宝麟科技发展(北京)有限公司 | High-strength temporary blocking agent for oil and gas wells and preparation method and application thereof |
| CN103615228A (en) * | 2013-11-26 | 2014-03-05 | 中国石油天然气股份有限公司 | Temporary plugging and fracturing process in degradable fiber clearance |
| CN104594870A (en) * | 2014-12-22 | 2015-05-06 | 中国石油天然气股份有限公司 | Fracturing stimulation method |
| CN104533375A (en) * | 2014-12-26 | 2015-04-22 | 中国石油天然气股份有限公司 | Natural fractured reservoir fracturing reformation method |
| CN106382111A (en) * | 2015-07-28 | 2017-02-08 | 中国石油化工股份有限公司 | Method increasing shale gas fracturing crack complexity |
| CN105275442A (en) * | 2015-10-29 | 2016-01-27 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Old well re-transformation volume fracturing technology |
| CN105649593A (en) * | 2015-12-31 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for maintaining flow conductivity of multi-slit fracturing seams in horizontal well section |
| CN105672970A (en) * | 2015-12-31 | 2016-06-15 | 中国石油天然气股份有限公司 | Method for realizing temporary plugging redirecting multiple crack fracturing inside horizontal well section |
| CN105649594A (en) * | 2015-12-31 | 2016-06-08 | 中国石油天然气股份有限公司 | Method for maintaining flow conductivity of seams near wellbore area |
| CN105756650A (en) * | 2016-03-28 | 2016-07-13 | 中国石油天然气股份有限公司 | Method for realizing staged fracturing of horizontal well by blocking channelling by adopting mixed temporary blocking agent |
| CN105927197A (en) * | 2016-04-27 | 2016-09-07 | 中国石油天然气股份有限公司 | Method for increasing production by old well temporary plugging volume fracturing repeated reconstruction in low permeability sandstone reservoir |
| CN106010492A (en) * | 2016-05-20 | 2016-10-12 | 重庆科技学院 | Degradable high-strength temporary blocking agent and preparation method thereof |
| CN105952430A (en) * | 2016-06-07 | 2016-09-21 | 中国石油天然气股份有限公司 | Volume fracturing and energy replenishing method for low-yield horizontal well in dense oil reservoir |
| CN106190095A (en) * | 2016-07-19 | 2016-12-07 | 郑州鑫源防磨耐材有限公司 | A kind of low-density and high-strength ceramic proppant and preparation method thereof |
| CN106194145A (en) * | 2016-09-27 | 2016-12-07 | 西南石油大学 | A kind of the most stifled multistage degree of depth network acid fracturing method |
| CN106593389A (en) * | 2016-12-22 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for fracturing high-angle naturally-fractured oil reservoir by using permanent plugging agent |
| CN106750345A (en) * | 2017-01-05 | 2017-05-31 | 西安石油大学 | A kind of synthetic method of the degradable diversion agent of slippery water pressure break |
Non-Patent Citations (3)
| Title |
|---|
| 李向平 等: "《鄂尔多斯盆地安83区块致密油藏老井暂堵混合水体积压裂技术》", 《油气地质与采收率》 * |
| 李建山 等: "《超低渗储层混合水体积压裂重复改造技术研究与现场试验》", 《石油与天然气化工》 * |
| 达引朋 等: "《低渗透老油田新型多缝重复压裂技术研究与应用》", 《石油钻探技术》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252844A (en) * | 2018-08-09 | 2019-01-22 | 古莱特科技股份有限公司 | A method of temporarily stifled turnaround fracture is realized using pressure difference polymerization diverting agent |
| CN109252844B (en) * | 2018-08-09 | 2019-10-29 | 古莱特科技股份有限公司 | A method of temporarily stifled turnaround fracture is realized using pressure difference polymerization diverting agent |
| CN109236259A (en) * | 2018-10-31 | 2019-01-18 | 西安科技大学 | A kind of contradictory fracturing process of adjustment water injection well plane water drive |
| CN109779592A (en) * | 2018-12-28 | 2019-05-21 | 中国石油天然气股份有限公司 | A kind of perforation press cracking method of the old well longitudinal direction Tapping Residual Oil of single sand body oil reservoir |
| CN109933845A (en) * | 2019-01-28 | 2019-06-25 | 西南石油大学 | A kind of unlatching range computation method of intrinsic fracture when temporarily stifled pressure break |
| CN110469308A (en) * | 2019-08-07 | 2019-11-19 | 北京九恒质信能源技术有限公司 | In a kind of straight well seam temporarily stall to fracturing experiments method |
| CN111350481A (en) * | 2020-04-17 | 2020-06-30 | 中国石油天然气集团有限公司 | Temporary plugging steering fracturing method among horizontal well clusters and in seams |
| CN111561300A (en) * | 2020-05-26 | 2020-08-21 | 中国石油天然气股份有限公司 | Method for improving water drive effect of water injection well of ultra-low permeability fractured reservoir |
| CN112302570A (en) * | 2020-10-26 | 2021-02-02 | 中国石油大学(北京) | Construction method and device based on temporary plugging of reservoir |
| CN112302570B (en) * | 2020-10-26 | 2022-08-12 | 中国石油大学(北京) | Construction method and device based on temporary plugging of reservoir |
| CN112410001A (en) * | 2020-11-05 | 2021-02-26 | 中国石油天然气股份有限公司大港油田分公司 | Floating agent and high-strength floating agent partition plate process for controlling fracture cross-layer propagation |
| CN112410001B (en) * | 2020-11-05 | 2023-05-26 | 中国石油天然气股份有限公司大港油田分公司 | Floating agent and high-strength floating agent partition plate process for controlling fracturing fracture perforating expansion |
| CN112943208A (en) * | 2021-01-21 | 2021-06-11 | 中国石油天然气股份有限公司 | Fracturing method for opening new crack by filling sand into crack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107558980B (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107558980A (en) | A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam | |
| CN107558981A (en) | A kind of more the scope of grain size grading temporarily block up the fracturing technology for realizing complex fracture | |
| CN107503729B (en) | A kind of micro- support fracturing method improving pressure break stationary phase | |
| CN105089596B (en) | A kind of hydraulic fracturing remodeling method of unconventional reservoir oil/gas well | |
| CN102925133B (en) | Fracturing fluid for controlling extension of fracture and fracturing method | |
| CN105422068B (en) | The method of horizontal well in segments volume fracturing and frac-pack combination and exploitation heavy crude reservoir | |
| CN104727801B (en) | A kind of fracturing technology that big passage is realized using proppant density variation | |
| CN107842351B (en) | A kind of anhydrous energization composite fracturing method of liquefied petroleum gas-carbon dioxide | |
| CN101333922A (en) | Fracturing process for removing breakdown fluid contamination | |
| CN109653721B (en) | Fracturing and energy-increasing oil displacement integrated process method for shallow low-pressure low-permeability oil reservoir | |
| CN105888641A (en) | Carbon dioxide-anti-drag water compound fracturing method | |
| CN101787864A (en) | Method for plugging water from oil reservoir fractured water logging oil well developed by injecting water into low-permeable reservoir stratum | |
| CN102434124A (en) | Successive-compounding-process based plugging method for well drilling | |
| CN103411804B (en) | Heterogeneous body consolidated core model with most permeable zone and preparation method thereof | |
| CN102817604A (en) | CO2 refracturing process technology for low-permeability gas well | |
| CN104564007B (en) | Non- Fractured densification sand mud reservoir straight well seam net fracturing technology | |
| CN106321046A (en) | Hydraulic sand fracturing gas extraction method for underground coal seam with low air permeability | |
| CN114075960B (en) | Shale reservoir hydraulic fracturing reverse-sequence multistage sand adding process | |
| CN104962251A (en) | Microemulsion filming sealing drilling fluid and preparation method | |
| CN110735622A (en) | kinds of supercritical CO2Method and device for exploiting coal bed gas by water-combined fracturing | |
| CN109751036A (en) | A kind of method that deep layer shale gas delays effective fracture transformation decreasing volumes | |
| CN109779592A (en) | A kind of perforation press cracking method of the old well longitudinal direction Tapping Residual Oil of single sand body oil reservoir | |
| CN109233783B (en) | Shear thickening liquid, modified degradable fiber based on shear thickening liquid, preparation method of modified degradable fiber and temporary plugging steering fracturing method | |
| CN102865061B (en) | Honeycomb fashion spread method and the application of proppant | |
| CN102364041A (en) | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |