CN109403913A - A kind of repetition remodeling method for promoting seam end and temporarily blocking up effect - Google Patents
A kind of repetition remodeling method for promoting seam end and temporarily blocking up effect Download PDFInfo
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- CN109403913A CN109403913A CN201811171743.XA CN201811171743A CN109403913A CN 109403913 A CN109403913 A CN 109403913A CN 201811171743 A CN201811171743 A CN 201811171743A CN 109403913 A CN109403913 A CN 109403913A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/10—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of amides or imides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
The present invention provides a kind of repetition remodeling methods for promoting seam end and temporarily blocking up effect, liquid temporary plugging technique and mixing water volume fracturing technology are combined, first is that by having the characteristics that resistance to compression, temperature resistance, anti-shearing, plastic and the controllable liquid gum plug diverting agent of gel breaking time to target zone injection, it is set to reach the end of first man-made fracture, Hou Ning forms the blocking of frozen glue shape, crack is inhibited to extend along first man-made fracture, control critical eigenvalue belt length；Second is that under the plugging action of liquid gum plug diverting agent, slippery water is injected with huge discharge, make to stitch interior net pressure and is promoted to 5MPa or more, open the lateral new seam of first man-made fracture, the lateral new seam opened using 40-70 mesh quartz sandfilling is recycled the first man-made fracture of 20-40 mesh quartz sandfilling, restores its flow conductivity, the fracture network system having compared with high flow conductivity is formed, realizes the purpose employed and manually stitch remaining oil in the ineffective fine pore of lateral water drive or matrix for the first time.
Description
Technical field
The invention belongs to In Oil Field Exploration And Development underground work technical fields, and in particular to effect is temporarily blocked up at a kind of promotion seam end
Repeat remodeling method.
Background technique
In recent years, people pass through a variety of sides such as inspection shaft analysis, remaining oil test, waterflooding development feature and numerical simulation
Method studies Ordos Basin different type oil reservoir Remaining Oil Distribution, the results showed that is influenced by dynamic seam, water drive involves
Volume reduces, and remaining oil is mainly distributed in crack two sides 80-100m range in continuous strip.Take conventional refracturing, crack
Easily along first fracture extension, crack bandwidth mainly in 40m or so, can not effectively employ the lateral remaining oil in old crack.
For this purpose, having carried out solid diverting agent old well seam end temporarily blocks up mixing water volume fracturing, which is to utilize fiber fracturing
Liquid carries solid diverting agent and migrates to fracture tip formation bridge blinding, promotes net pressure in stitching, it is laterally new to open first man-made fracture
Seam expands drainage area.But since the easy dispersing and settling of solid diverting agent, the temporary stifled unstable and site operation that boosts have sand plug wind
The problems such as dangerous, cannot provide enough net pressures to open lateral new seam, can not effectively employ lateral remaining oil, influence to repeat to change
Make effect.Therefore, it is necessary to carry out new seam end temporary plugging technique research and experiment to promote seam end and temporarily block up effect.
Summary of the invention
The purpose of the present invention is to provide a kind of repetition remodeling methods for promoting seam end and temporarily blocking up effect, overcome in the prior art
The existing above problem.
Technical solution provided by the invention is as follows:
A kind of repetition remodeling method for promoting seam end and temporarily blocking up effect, comprising the following steps:
Step 1) prepares 20-30m3Liquid gum plug diverting agent；
Step 2 is with 0.5-2.0m3/ min injects 10-15m3Active water is low to replace and set；
Step 3) is with 2.0-3.0m3/ min injects 20-30m to target zone3Slippery water；
Step 4) is with 2.0-3.0m3/ min injects 20-30m to target zone3Liquid gum plug diverting agent, then with 2.0-3.0m3/ min note
Enter 25-35m3Guanidine matrix liquid all replaces liquid gum plug diverting agent into stratum, and termination of pumping 4 hours；
Step 5) is with 3.0-4.0m3/ min injects 10-20m to target zone3Slippery water, make to stitch interior net pressure be increased to 5MPa with
On；
Step 6) is with 3.0-4.0m3/ min injects load fluid to target zone, and load fluid fills group by slippery water and 40-70 mesh quartz sand
At slippery water 100-150m3, sand concentration is 130-200 g/cm3；
Step 7) is with 3.0-4.0m3/ min injects 250-300m to target zone3The guanidine gum fracturing fluid of crosslinking is according to 230-550g/cm3
Sand concentration carry 20-40 mesh quartz sand；
Step 8) is with 3.0-4.0m3/ min is replaced to the active water of flow line volume amount under target zone injection well；
After step 9) interval of interest has been constructed, the row of returning after closing well 72 hours；
The complete well of step 10) sand washing, operation.
The liquid gum plug diverting agent is formed by the substance of following mass percent by cross-linked polymeric: water 81.9-93%,
Amphiprotic polyacrylamide 0.3-1%, initiator 0.02-0.06%, anionic monomer 1-5%, crosslinking agent 0.02-0.06%, cation
Monomer 6-12%.
Slippery water described in step 3) opens first man-made fracture as prepad fluid.
The liquid of guanidine matrix described in step 4) crosses replacement, so that liquid gum plug diverting agent is migrated to first man-made fracture end, stops
Pump 4 hours makes liquid gum plug diverting agent form the blocking of frozen glue shape at seam end.
Net pressure is increased to 5MPa or more in seam described in step 5), to open the lateral new seam of first man-made fracture.
Load fluid described in step 6) fills the lateral new seam of first man-made fracture.
It carries out returning in step 9) draining into and returns drain viscosity less than 5mPa.s.
The cationic monomer is dimethyl diallyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride, methyl-prop
One or more of alkene acyloxyethyl trimethyl ammonia chloride amine, the anionic monomer are acrylamide, Methacrylamide, third
One or more of alkene nitrile, sodium acrylate, acrylic acid, methacrylic acid, acrylamido methyl propane sulfonic acid, the both sexes are poly-
The relative molecular weight of acrylamide be 500-1400 ten thousand, the initiator be sodium thiosulfate, potassium thiosulfate, ammonium persulfate,
One or more of sodium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, the crosslinking agent are PEI resin, C10-30 alkyl
Sour rouge or NN- methylene-bisacrylamide.
The preparation process of the liquid gum plug diverting agent the following steps are included:
Step 1, base fluid is prepared: the amphiprotic polyacrylamide of formula ratio is added while stirring in water, adds after stirring 15-20min
Enter the cationic monomer of formula ratio, standing be swelling to liquid viscosity after mixing evenly is 15mPas；
Step 2, the crosslinking agent of formula ratio, initiator are added water and stirred respectively and prepares crosslinked fluid, initiator liquid；
Step 3, crosslinked fluid, initiator liquid are added in base fluid respectively, are stirred evenly to obtain the final product.
The beneficial effects of the present invention are:
The present invention makes it reach the end of first man-made fracture, Hou Ning first is that by injecting liquid gum plug diverting agent to target zone
The blocking of frozen glue shape is formed, inhibits crack to extend along first man-made fracture, control critical eigenvalue belt length；Second is that in liquid gum plug diverting agent
Under plugging action, slippery water is injected with huge discharge, makes to stitch interior net pressure and is promoted to 5MPa or more, it is lateral to open first man-made fracture
New seam, using 40-70 mesh quartz sandfilling open lateral new seam, recycle 20-40 mesh quartz sandfilling manually split for the first time
Seam restores its flow conductivity, forms the fracture network system having compared with high flow conductivity, and realization is employed manually stitches lateral water for the first time
Drive the purpose of remaining oil in ineffective fine pore or matrix.
It will be described in further details below.
Specific embodiment
Embodiment 1:
Present embodiments provide a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect, comprising the following steps:
Step 1) prepares 20-30m3Liquid gum plug diverting agent；
Step 2 is with 0.5-2.0m3/ min injects 10-15m3Active water is low to replace and set；
Step 3) is with 2.0-3.0m3/ min injects 20-30m to target zone3Slippery water；
Step 4) is with 2.0-3.0m3/ min injects 20-30m to target zone3Liquid gum plug diverting agent, then with 2.0-3.0m3/ min note
Enter 25-35m3Guanidine matrix liquid all replaces liquid gum plug diverting agent into stratum, and termination of pumping 4 hours；
Step 5) is with 3.0-4.0m3/ min injects 10-20m to target zone3Slippery water, make to stitch interior net pressure be increased to 5MPa with
On；
Step 6) is with 3.0-4.0m3/ min injects load fluid to target zone, and load fluid fills group by slippery water and 40-70 mesh quartz sand
At slippery water 100-150m3, sand concentration is 130-200 g/cm3；
Step 7) is with 3.0-4.0m3/ min injects 250-300m to target zone3The guanidine gum fracturing fluid of crosslinking is according to 230-550g/cm3
Sand concentration carry 20-40 mesh quartz sand；
Step 8) is with 3.0-4.0m3/ min is replaced to the active water of flow line volume amount under target zone injection well；
After step 9) interval of interest has been constructed, the row of returning after closing well 72 hours；
The complete well of step 10) sand washing, operation.
The present embodiment combines liquid temporary plugging technique and mixing water volume fracturing technology, is primarily adapted for use in and had been carried out often
Advise fracturing reform, the faster oil well of production decline.It proposes by the way that liquid gum plug diverting agent is migrated to first man-made fracture end
Portion's Hou Ning plastic promotes the method for stitching interior net pressure, and the easy dispersing and settling of emphasis solution solid blocking agent, temporarily stifled boosting is stable and constructs
The problems such as there are sand plug risks under the plugging action of liquid gum plug diverting agent, then by mixing water volume fracturing, is promoted in seam
Net pressure opens lateral new seam, restores first man-made fracture flow conductivity, form the complex fracture system having compared with high flow conductivity
System, expands the development degree of lateral remaining oil, achieves preferable effect.
On the basis of embodiment 1, following embodiment is by taking Ordos Basin ultralow permeable reservoir and Oil in Super-low Permeability oil reservoir as an example,
The present invention will be further described.
Ordos Basin ultralow permeable reservoir and Oil in Super-low Permeability oil reservoir are influenced during exploitation by dynamic seam, water drive wave
And volume reduces, remaining oil is mainly distributed in crack two sides 80-100m range in continuous strip.Take conventional refracturing, nothing
Method effectively employs the lateral remaining oil in old crack, temporarily blocks up mixing water volume fracturing technology using solid diverting agent old well seam end, although
Can control crack belt length, increase crack bandwidth, but due to solid diverting agent during temporary stifled easy dispersing and settling, boost not
Stablize, there is the risk of sand plug.
Embodiment 2:
In order to make up the deficiency of solid diverting agent, this example provides this repetition remodeling method for promoting seam end and temporarily blocking up effect,
Include the following steps:
Step 1) prepares 20 m3Liquid gum plug diverting agent；
Step 2 is with 0.5-2.0m3/ min injects 10 m3Active water is low to replace and set；
Step 3) is carried out to target zone with 2.0m3/ min injects 20 m3Slippery water opens first man-made fracture as prepad fluid,
And leak-off is to reservoir matrix hole and natural microcrack；
Step 4) is carried out to interval of interest with 2.0m3/ min injects 20m3Liquid gum plug diverting agent, then with 2.0-3.0m3/ min note
Enter 30m3Guanidine matrix liquid all replaces liquid gum plug diverting agent into stratum, migrates to liquid gum plug diverting agent first artificial
Fracture tip termination of pumping 4 hours, makes liquid gum plug diverting agent form the blocking of frozen glue shape at seam end, realizes the mesh of control critical eigenvalue belt length
's；
Step 5) is carried out to interval of interest with 3.0m3/ min injects 15m3Slippery water, in the plugging action of liquid gum plug diverting agent
Under, make to stitch interior net pressure and be increased to 5MPa or more, opens the lateral new seam of first man-made fracture；
Step 6) is carried out to target zone with 3.0m3/ min injects 100m3Slippery water is according to 130-200 g/cm3Sand concentration carry
The lateral new seam of the first man-made fracture of 40-70 mesh quartz sandfilling, realizes the complex fracture net for being formed and being had compared with high flow conductivity
The purpose of network system；
Step 7) is carried out to target zone with 3.0m3/ min injects 250m3The guanidine gum fracturing fluid of crosslinking is according to 230-550g/cm3Sand
Concentration carries 20-40 mesh quartz sand, fills to major fracture, realizes the purpose for restoring first man-made fracture flow conductivity；
Step 8) is with 3.0m3/ min injects 5.4m3Active water replaces；
After step 9) interval of interest has been constructed, the row of returning after closing well 72 hours, so that liquid gum plug and fracturing fluid fully degraded, the row of returning
Fluid viscosity is less than 5mPa.s；
The complete well of step 10) sand washing, operation.
In the present embodiment, the liquid gum plug diverting agent passes through cross-linked polymeric shape by the substance of following mass percent
At: water 81.9-93%, amphiprotic polyacrylamide 0.3-1%, initiator 0.02-0.06%, anionic monomer 1-5%, crosslinking agent
0.02-0.06%, cationic monomer 6-12%.
The cationic monomer is dimethyl diallyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride, methyl-prop
One or more of alkene acyloxyethyl trimethyl ammonia chloride amine, the anionic monomer are acrylamide, Methacrylamide, third
One or more of alkene nitrile, sodium acrylate, acrylic acid, methacrylic acid, acrylamido methyl propane sulfonic acid, the both sexes are poly-
The relative molecular weight of acrylamide be 500-1400 ten thousand, the initiator be sodium thiosulfate, potassium thiosulfate, ammonium persulfate,
One or more of sodium peroxydisulfate, potassium peroxydisulfate, hydrogen peroxide, the crosslinking agent are PEI resin, C10-30 alkyl
Sour rouge or NN- methylene-bisacrylamide.
Embodiment 3:
A kind of repetition remodeling method for promoting seam end and temporarily blocking up effect, comprising the following steps:
Step 1) prepares 30m3Liquid gum plug diverting agent；
Step 2 is with 0.5-2.0m3/ min injects 10m3Active water is low to replace and set；
Step 3) is carried out to target zone with 3.0m3/ min injects 30m3Slippery water opens first man-made fracture as prepad fluid, and
Quick leak-off；
Step 4) is carried out to interval of interest with 3.0m3/ min injects 30m3Liquid gum plug diverting agent, then with 3.0m3/ min injection
35m3Guanidine matrix liquid crosses replacement, so that liquid gum plug diverting agent is migrated to first man-made fracture end, termination of pumping 4 hours, makes liquid glue
It fills in diverting agent and forms the blocking of frozen glue shape at seam end, realize the purpose of control critical eigenvalue belt length；
Step 5) is carried out to interval of interest with 4.0m3/ min injects 20m3Slippery water, in the plugging action of liquid gum plug diverting agent
Under, make to stitch interior net pressure and be increased to 5MPa or more, opens the lateral new seam of first man-made fracture；
Step 6) is carried out to target zone with 4.0m3/ min injects 140m3Slippery water is according to 130-200 g/cm3Sand concentration carry
The lateral new seam of the first man-made fracture of 40-70 mesh quartz sandfilling, realizes the complex fracture net for being formed and being had compared with high flow conductivity
The purpose of network system；
Step 7) is carried out to target zone with 4.0m3/ min injects 300m3The guanidine gum fracturing fluid of crosslinking is according to 230-550g/cm3Sand
Concentration carries 20-40 mesh quartz sand, fills to major fracture, realizes the purpose for restoring first man-made fracture flow conductivity；
Step 8) is with 4.0m3/ min injects 7.8m3Active water replaces；
After step 9) interval of interest has been constructed, the row of returning after closing well 72 hours, so that liquid gum plug and fracturing fluid fully degraded, the row of returning
Fluid viscosity is less than 5mPa.s；
The complete well of step 10) sand washing, operation.
10 mouthfuls of wells of field conduct, pressure bomb test show the temporarily stifled 4MPa or more that boosts, and stitch interior net pressure and reach 5MPa or more,
The mechanical condition opened and laterally newly stitched is reached.Test well well yield is increased to 2.0t or more by the 0.6t before measure, is containing
Under conditions of water is stablized, oil well output and ultimate recovery are effectively raised.The process is simple and easy, temporarily stifled to rise
Pressure is stablized, and construction risk is low, and measure effect is preferable.
Wherein, the liquid gum plug diverting agent in four mouthfuls of wells is formed by the substance of following mass percent by cross-linked polymeric: water
88.3%, amphiprotic polyacrylamide 0.6%, initiator 0.05%, anionic monomer 1%, crosslinking agent 0.05%, cationic monomer 10%.
Viscosity is 15mPa.s.
There is the liquid gum plug diverting agent in three mouthfuls of wells to be formed by the substance of following mass percent by cross-linked polymeric: water
88.12%, amphiprotic polyacrylamide 0.8%, initiator 0.05%, anionic monomer 1%, crosslinking agent 0.03%, cationic monomer 10%.
Viscosity is 36mPa.s.
There is the liquid gum plug diverting agent in three mouthfuls of wells to be formed by the substance of following mass percent by cross-linked polymeric: water
90.14%, amphiprotic polyacrylamide 0.8%, initiator 0.03%, anionic monomer 1%, crosslinking agent 0.03%, cationic monomer 8%.
Viscosity is 36mPa.s.
The preparation process of the liquid gum plug diverting agent the following steps are included:
Step 1, base fluid is prepared: the amphiprotic polyacrylamide of formula ratio is added while stirring in water, adds after stirring 15-20min
Enter the cationic monomer of formula ratio, standing be swelling to liquid viscosity after mixing evenly is 15mPas；
Step 2, the crosslinking agent of formula ratio, initiator are added water and stirred respectively and prepares crosslinked fluid, initiator liquid；
Step 3, crosslinked fluid, initiator liquid are added in base fluid respectively, are stirred evenly to obtain the final product.
Liquid gum plug diverting agent starts to viscosify in 12-20min, and plastic deforms later, alternately non-deformable after 50min.Glue
Plug can be acted on broken glue, breaking glue solution viscosity automatically by gel breaker and be less than 5mpa.s, and to reservoir damage less than 15%, compression strength is big
It the use of temperature is 20-70 DEG C in 15MPa.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.The component that embodiment does not describe in detail
With the well-known components and common structure or conventional means of the structure category industry, do not describe one by one here.
Claims (9)
1. a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect, which comprises the following steps:
Step 1) prepares 20-30m3Liquid gum plug diverting agent；
Step 2 is with 0.5-2.0m3/ min injects 10-15m3Active water is low to replace and set；
Step 3) is with 2.0-3.0m3/ min injects 20-30m to target zone3Slippery water；
Step 4) is with 2.0-3.0m3/ min injects 20-30m to target zone3Liquid gum plug diverting agent, then with 2.0-3.0m3/ min note
Enter 25-35m3Guanidine matrix liquid all replaces liquid gum plug diverting agent into stratum, and termination of pumping 4 hours；
Step 5) is with 3.0-4.0m3/ min injects 10-20m to target zone3Slippery water, makes to stitch interior net pressure and is increased to 5MPa or more；
Step 6) is with 3.0-4.0m3/ min injects load fluid to target zone, and load fluid fills group by slippery water and 40-70 mesh quartz sand
At slippery water 100-150m3, sand concentration is 130-200 g/cm3；
Step 7) is with 3.0-4.0m3/ min injects 250-300m to target zone3The guanidine gum fracturing fluid of crosslinking is according to 230-550g/cm3
Sand concentration carry 20-40 mesh quartz sand；
Step 8) is with 3.0-4.0m3/ min is replaced to the active water of flow line volume amount under target zone injection well；
After step 9) interval of interest has been constructed, the row of returning after closing well 72 hours；
The complete well of step 10) sand washing, operation.
2. a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect according to claim 1, it is characterised in that: the liquid
Body rubber plug diverting agent is formed by the substance of following mass percent by cross-linked polymeric: water 81.9-93%, amphiprotic polyacrylamide
0.3-1%, initiator 0.02-0.06%, anionic monomer 1-5%, crosslinking agent 0.02-0.06%, cationic monomer 6-12%.
3. according to a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect described in claim 1, it is characterised in that: in step 3)
The slippery water opens first man-made fracture as prepad fluid.
4. according to a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect described in claim 1, it is characterised in that: in step 4)
The guanidine matrix liquid crosses replacement, so that liquid gum plug diverting agent is migrated to first man-made fracture end, termination of pumping 4 hours, makes liquid glue
It fills in diverting agent and forms the blocking of frozen glue shape at seam end.
5. according to a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect described in claim 1, it is characterised in that: in step 5)
Net pressure is increased to 5MPa or more in the seam, to open the lateral new seam of first man-made fracture.
6. temporarily blocking up the repetition remodeling method of effect according to a kind of promotion seam end described in claim 5, it is characterised in that: in step 6)
The load fluid fills the lateral new seam of first man-made fracture.
7. temporarily blocking up the repetition remodeling method of effect according to a kind of promotion seam end described in claim 5, it is characterised in that: in step 9)
Return draining into and returns drain viscosity less than 5mPa.s.
8. according to it is as claimed in claim 2 it is a kind of promoted seam end temporarily block up effect repetition remodeling method, it is characterised in that: it is described sun from
Sub- monomer is dimethyl diallyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride, methylacryoyloxyethyl trimethyl
One or more of ammonium chloride, the anionic monomer are acrylamide, Methacrylamide, acrylonitrile, sodium acrylate, third
One or more of olefin(e) acid, methacrylic acid, acrylamido methyl propane sulfonic acid, opposite point of the amphiprotic polyacrylamide
Son amount is 500-1400 ten thousand, and the initiator is sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium peroxydisulfate, persulfuric acid
One or more of potassium, hydrogen peroxide, the crosslinking agent are PEI resin, C10-30 alkyl acrylic rouge or NN- methylene
Base bisacrylamide.
9. according to a kind of repetition remodeling method for promoting seam end and temporarily blocking up effect as claimed in claim 2, which is characterized in that the liquid
The preparation process of rubber plug diverting agent the following steps are included:
Step 1, base fluid is prepared: the amphiprotic polyacrylamide of formula ratio is added while stirring in water, adds after stirring 15-20min
Enter the cationic monomer of formula ratio, standing be swelling to liquid viscosity after mixing evenly is 15mPas；
Step 2, the crosslinking agent of formula ratio, initiator are added water and stirred respectively and prepares crosslinked fluid, initiator liquid；
Step 3, crosslinked fluid, initiator liquid are added in base fluid respectively, are stirred evenly to obtain the final product.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552675A (en) * | 2019-08-26 | 2019-12-10 | 中国石油天然气股份有限公司 | non-crack type water-breakthrough oil well repeated transformation method |
| 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 |
| CN111577198A (en) * | 2020-05-28 | 2020-08-25 | 中国石油天然气股份有限公司 | Plugging and pressure increasing integrated repeated transformation method for controlling water and increasing oil by utilizing stratum pre-crosslinked gel plugging agent |
| CN111927385A (en) * | 2020-07-15 | 2020-11-13 | 陕西明德石油科技有限公司 | Gel foam temporary plugging and shunting fracturing method for ultra-low permeability reservoir |
| CN112253041A (en) * | 2020-10-26 | 2021-01-22 | 中国石油天然气股份有限公司 | Multi-section modification fracturing method for compact reservoir in advanced water injection development area |
| CN112392455A (en) * | 2020-11-19 | 2021-02-23 | 中国石油天然气股份有限公司 | Repeated transformation method for improving crack plugging effect |
| CN112574734A (en) * | 2020-11-20 | 2021-03-30 | 西安力勘石油能源科技有限公司 | Self-generating thermal fracturing fluid and preparation and pumping method thereof |
| CN113898327A (en) * | 2020-06-22 | 2022-01-07 | 中国石油化工股份有限公司 | Method for repeated acid pressing of deep carbonate rock multiple liquid rubber plugs and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110552675A (en) * | 2019-08-26 | 2019-12-10 | 中国石油天然气股份有限公司 | non-crack type water-breakthrough oil well repeated transformation method |
| 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 |
| CN111577198A (en) * | 2020-05-28 | 2020-08-25 | 中国石油天然气股份有限公司 | Plugging and pressure increasing integrated repeated transformation method for controlling water and increasing oil by utilizing stratum pre-crosslinked gel plugging agent |
| CN113898327A (en) * | 2020-06-22 | 2022-01-07 | 中国石油化工股份有限公司 | Method for repeated acid pressing of deep carbonate rock multiple liquid rubber plugs and application |
| CN113898327B (en) * | 2020-06-22 | 2024-03-08 | 中国石油化工股份有限公司 | Repeated acid fracturing method and application of multiple liquid rubber plugs of deep carbonate rock |
| CN111927385A (en) * | 2020-07-15 | 2020-11-13 | 陕西明德石油科技有限公司 | Gel foam temporary plugging and shunting fracturing method for ultra-low permeability reservoir |
| CN112253041A (en) * | 2020-10-26 | 2021-01-22 | 中国石油天然气股份有限公司 | Multi-section modification fracturing method for compact reservoir in advanced water injection development area |
| CN112392455A (en) * | 2020-11-19 | 2021-02-23 | 中国石油天然气股份有限公司 | Repeated transformation method for improving crack plugging effect |
| CN112392455B (en) * | 2020-11-19 | 2023-06-30 | 中国石油天然气股份有限公司 | Repeated transformation method for improving crack plugging effect |
| CN112574734A (en) * | 2020-11-20 | 2021-03-30 | 西安力勘石油能源科技有限公司 | Self-generating thermal fracturing fluid and preparation and pumping method thereof |
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