CN104498014A - Gel breaking liquid based modifying and flooding agent and preparation method thereof - Google Patents
Gel breaking liquid based modifying and flooding agent and preparation method thereof Download PDFInfo
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- CN104498014A CN104498014A CN201410834901.0A CN201410834901A CN104498014A CN 104498014 A CN104498014 A CN 104498014A CN 201410834901 A CN201410834901 A CN 201410834901A CN 104498014 A CN104498014 A CN 104498014A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 239000004094 surface-active agent Substances 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims description 97
- 239000000243 solution Substances 0.000 claims description 87
- 239000004064 cosurfactant Substances 0.000 claims description 64
- 239000003921 oil Substances 0.000 claims description 34
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 24
- 239000004141 Sodium laurylsulphate Substances 0.000 claims description 24
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 24
- -1 polyoxyethylene nonylphenol Polymers 0.000 claims description 22
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 18
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 18
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 claims description 14
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000010779 crude oil Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- 125000005211 alkyl trimethyl ammonium group Chemical group 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 4
- MRAPAFWHXSJNRN-UHFFFAOYSA-M icosyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCCCC[N+](C)(C)C MRAPAFWHXSJNRN-UHFFFAOYSA-M 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 19
- 238000011084 recovery Methods 0.000 abstract description 19
- 239000003129 oil well Substances 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000011435 rock Substances 0.000 abstract description 3
- 230000005660 hydrophilic surface Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000001804 emulsifying effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000009096 changqing Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
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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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/30—Viscoelastic surfactants [VES]
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Abstract
The invention discloses a gel breaking liquid based modifying and flooding agent, which mainly comprises the following raw materials in percentage by weight: 0.1-0.4% of thickened water/clean fracturing fluid/gel breaking liquid, 0.004%-0.01% of a co-surfactant, and the balance of oilfield injected water. The preparation method of the modifying and flooding agent comprises the following steps: preparing thickened water/clean fracturing fluid/gel breaking liquid, and adding a co-surfactant and oilfield injected water into the gel breaking liquid, so that the modifying and flooding agent is obtained. The prepared modifying and flooding agent can be directly injected into a water injection well, and then enters an oil well through the water injection well, so that the oil-water interfacial tension can be effectively reduced; an oleophyllic rock surface is converted into a weak hydrophilic surface, so that the capillary force is reduced; and remaining oil is activated, so that the oil recovery is greatly enhanced.
Description
Technical field
The present invention relates to a kind of adjusting driving agnet based on breaking glue solution; The invention still further relates to the preparation method of this adjusting driving agnet.
Background technology
Fracturing technique in Changqing oilfields and the popularization and application of numerous domestic oil field, meets the demand of oil-gas field storey increase design as the gordian technique of low permeability oil and gas field Efficient Development.In recent years, clean fracturing fluid obtains large-scale application with advantages such as its low frictional resistance, Low Damage, but also creates simultaneously and a large amount of return discharge opeing.Based on environmental protection and cost-effectiveness requirement, how rational and efficient use and process this and return discharge opeing, becomes current problem demanding prompt solution.
Application number is CN200910159223.1, publication number is 101629486A, publication date is that the patent application of 2010.01.20 proposes a kind of cleaning fracturing outlet liquid recovery oil displacement and de-plugging process, it is disclosed that adding flocculation agent or adhesive mud remover or sterilant after cleaning fracturing outlet liquid is broken glue carries out sedimentation of suspension and sterilization, then after filtration, essence carries out the interpolation of chemical agent or compositely makes oil-displacing agent after filtering, but this oil-displacing agent effectively can not reduce the interfacial tension with ground crude oil.And the method need add flocculation agent, adhesive mud remover, sterilant and biological enzyme formulation, and return discharge opeing need through accurate filter filter, technique is comparatively complicated.
Summary of the invention
The object of the present invention is to provide a kind of adjusting driving agnet based on breaking glue solution, its surface tension is lower, effectively can reduce oil water interfacial tension, improves oil recovery factor.
Second object of the present invention is the preparation method providing above-mentioned adjusting driving agnet.
First technical scheme of the present invention, based on the adjusting driving agnet of breaking glue solution, comprising weight percent is the breaking glue solution of 0.1%-0.4% and the cosurfactant of 0.004%-0.01%, and all the other are oilfield injection water.
Above-mentioned cosurfactant is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether.
What above-mentioned breaking glue solution referred to that a kind of pressure break of being added in crude oil, kerosene, water and ethanol by viscous water clean fracturing fluid breaks glue returns the supernatant liquor of discharge opeing after sedimentation filtration.
Above-mentioned viscous water clean fracturing fluid refers to the clean fracturing fluid be made up of viscoelastic surfactant; Described viscoelastic surfactant refers to one or more in chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine, cocounut oil acid amide trimethyl-glycine.
Second technical scheme of the present invention, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
Step 1, reclaims the breaking glue solution of the row of returning;
Step 2, adds cosurfactant and oilfield injection water in the breaking glue solution reclaimed, and the obtained adjusting driving agnet of mixing, the weight percent of each component is breaking glue solution 0.1%-0.4%, cosurfactant 0.004%-0.01%, and all the other are oilfield injection water.
The particle size distribution range of above-mentioned adjusting driving agnet is 600nm-800nm.
The present invention has following beneficial effect:
1, adjusting driving agnet of the present invention utilizes breaking glue solution and on-the-spot oilfield injection water as raw material, and not only effectively reclaimed the breaking glue solution of the row of returning, material is easy to get, utilization of waste material, and its surface tension is lower.Cosurfactant in adjusting driving agnet and breaking glue solution produce and act synergistically, and can reduce interfacial tension between profit, increase substantially displacement efficiency;
2, adjusting driving agnet of the present invention has the displacement of reservoir oil and profile control function concurrently, and the interfacial tension between adjusting driving agnet and crude oil can be reduced to 10
-3-10
-4mNm
-1, have good emulsifying property, heat-resistant salt-resistant performance, dynamic adsorbance is less than 2mg/g.By reducing interfacial tension between profit, wettability reversal, emulsified crude oil, blocking high permeability band, improving the mechanism such as sweep efficiency, oil recovery factor can be made to improve more than 8%;
3, the preparation method of adjusting driving agnet of the present invention utilizes the breaking glue solution of the row of returning and on-the-spot oilfield injection water to make adjusting driving agnet, this adjusting driving agnet directly can inject water injection well, enter oil well through water injection well to have an effect, make the recovery of breaking glue solution, the preparation of adjusting driving agnet and use integration, not only reduce environmental protection pressure, reduce treatment cost of waste liquor, and improve utilization ratio and the use value of breaking glue solution, there is very high economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention is based on the preparation method of the adjusting driving agnet of breaking glue solution and the process flow sheet for improving oil recovery factor thereof;
In figure, 1. viscous water clean fracturing fluid, 2. propping agent, 3. truck-mounted blender, 4. fracturing truck, 5. oil well, 6. extraction crude oil, 7. water injection well, 8. drive open flow into, 9. the breaking glue solution of the row of returning, 10. desanding is filtered, 11. Concentration Testing, 12. add cosurfactants, and 13. based on the adjusting driving agnet of breaking glue solution, 14. injection pumps, 15. under meters, 16. tensimeters, 17. waterflood-transmission lines.
Embodiment
Embodiment 1, based on the adjusting driving agnet of breaking glue solution, comprising weight percent is the breaking glue solution of 0.1%-0.4% and the cosurfactant of 0.004%-0.01%, and all the other are oilfield injection water.
Cosurfactant in this adjusting driving agnet and viscous water clean fracturing fluid breaking glue solution produce and act synergistically, and surface tension is lower, can reduce interfacial tension between profit, increase substantially displacement efficiency, improve oil recovery factor.
Embodiment 2, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.25%, the cosurfactant of 0.006%, and all the other are on-the-spot injection water, and cosurfactant is Sodium dodecylbenzene sulfonate.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Cosurfactant and the viscous water clean fracturing fluid breaking glue solution of the adjusting driving agnet of the present embodiment can produce stronger synergy, have good emulsifying property, heat-resistant salt-resistant performance.Cosurfactant is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether, and raw material is easy to get, alternative strong.
Embodiment 3, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.1%, the cosurfactant of 0.004%, and all the other are on-the-spot injection water, and cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The cosurfactant of the present embodiment adjusting driving agnet and breaking glue solution produce stronger synergy, effectively can reduce oil water interfacial tension, have good emulsifying property, heat-resistant salt-resistant performance.
Embodiment 4, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.4%, the cosurfactant of 0.01%, and all the other are on-the-spot inject water or local water, and cosurfactant is that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The adjusting driving agnet of the present embodiment has good emulsifying property, heat-resistant salt-resistant performance, and dynamic adsorbance is less than 2mg/g.
Embodiment 5, based on the adjusting driving agnet of breaking glue solution, main composition comprises: the breaking glue solution of 0.2%, the cosurfactant of 0.008%, and all the other are on-the-spot inject water or local water, and cosurfactant is that sodium laurylsulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Adjusting driving agnet of the present invention and length
6interfacial tension between crude oil can reach 10
-3mNm
-1, have good emulsifying property, heat-resistant salt-resistant performance, dynamic adsorbance is less than 2mg/g.
This adjusting driving agnet surface tension is low, can effectively reduce interfacial tension between profit, improves sweep efficiency.
Embodiment 6, on the basis of embodiment 1, in the present embodiment, breaking glue solution be add that crude oil fracturing breaks glue by viscous water clean fracturing fluid return the supernatant liquor of discharge opeing after sedimentation filtration.
Breaking glue solution also can be add that kerosene, water or ethanol pressure break break glue by viscous water clean fracturing fluid return the supernatant liquor of discharge opeing after sedimentation filtration.
Viscous water clean fracturing fluid refers to the clean fracturing fluid be made up of viscoelastic surfactant; Viscoelastic surfactant refers to a kind of, the combination of two kinds, three kinds, four kinds in chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine, cocounut oil acid amide trimethyl-glycine, also can be the combination of chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine and cocounut oil acid amide trimethyl-glycine, the ratio of each component be arbitrarily than.
The breaking glue solution that the present embodiment adjusting driving agnet is formed after adopting viscous water clean fracturing fluid pressure break, is conducive to environment protection, and adopts the supernatant liquor after breaking glue solution precipitation; excellent property; interfacial tension between profit can be reduced further, improve displacement efficiency, and then improve oil recovery factor.
Embodiment 7, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) get 5mL clean fracturing fluid viscosifying agent G9 to add in 100g water, stir 1min rapidly, namely crosslinkable obtains viscous water clean fracturing fluid; In the viscous water clean fracturing fluid obtained, add 2mL kerosene stir, in 60 DEG C of water-baths, leave standstill 5h break glue, obtain breaking glue solution, breaking glue solution viscosity is less than 5mPas.
(2) in the breaking glue solution obtained, add cosurfactant Sodium dodecylbenzene sulfonate and local water, obtain adjusting driving agnet.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment adopts Changqing oilfields Ansai long
6reservoir formation water preparation adjusting driving agnet, wherein breaking glue solution accounts for 0.3%, and cosurfactant accounts for 0.01%, and surplus is local water.
The technical feature of this adjusting driving agnet is as shown in table 1:
Table 1 is based on the adjusting driving agnet performance of the breaking glue solution of viscous water clean fracturing fluid G9
The present embodiment adopts the breaking glue solution of the row of returning to be that adjusting driving agnet made by raw material, effectively make use of breaking glue solution, and obtained adjusting driving agnet excellent property, for oil recovering, interfacial tension between profit can be reduced further, improve displacement efficiency, improve oil recovery factor.
Embodiment 8, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) get 5mL clean fracturing fluid viscosifying agent G5 to add in 100g water, stir 1min rapidly, namely crosslinkable obtains viscous water clean fracturing fluid.Then add 2mL ethanol wherein to stir, in 80 DEG C of water-baths, leave standstill 5h break glue, can obtain breaking glue solution, breaking glue solution viscosity is less than 5mPas.Also ethanol can be replaced with water.
(2) in breaking glue solution, cosurfactant Sodium dodecylbenzene sulfonate is added and Changqing oilfields Ansai is long
6reservoir formation water, obtains adjusting driving agnet.Wherein breaking glue solution accounts for 0.1%, and cosurfactant accounts for 0.005%, and surplus is local water.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Should be as shown in table 2 based on the technical feature of clean fracturing fluid viscosifying agent G5 of the fracturing fluid breaking glue solution adjusting driving agnet:
Table 2 is based on the breaking glue solution adjusting driving agnet performance of viscous water clean fracturing fluid G5
The adjusting driving agnet that the present embodiment is made, its surface tension is lower, can reduce interfacial tension between profit further, improves displacement efficiency, makes the recovery ratio of crude oil improve 10.04%.
Embodiment 9, based on the preparation method of the adjusting driving agnet of breaking glue solution, comprises the following steps:
(1) pressure is split on-the-spot pressure break and is broken glue construction and terminate the breaking glue solution that row is returned at rear scene, and indoor employing Medium speed filter paper filters, and obtains lower clear liquid and is breaking glue solution.
(2) in breaking glue solution, cosurfactant Sodium dodecylbenzene sulfonate is added and Changqing oilfields Ansai is long
6reservoir formation water, mixing, obtains adjusting driving agnet.Wherein breaking glue solution content is 0.3%, and cosurfactant content is 0.01%, and surplus is local water.
This technical feature returning the breaking glue solution adjusting driving agnet of row based on scene is as shown in table 3:
Table 3 returns the adjusting driving agnet performance of the breaking glue solution of row based on scene
The adjusting driving agnet that the present embodiment is obtained, effectively can improve oil recovering, makes oil recovery factor improve 9.04%.
Embodiment 10, on the basis of embodiment 9, in the present embodiment, the weight percent of each component is the breaking glue solution of 0.25%, the cosurfactant of 0.006%, and all the other are on-the-spot injection water, and cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The cosurfactant of the present embodiment is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether, and raw material is easy to get, and cost is low, and adjusting driving agnet excellent property.
Embodiment 11, on the basis of embodiment 9, in the present embodiment, the per-cent of each component is the breaking glue solution of 0.1%, the cosurfactant of 0.004%, all the other are on-the-spot inject water, and cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment adjusting driving agnet not only excellent property, makes oil water interfacial tension reduce, and can block macropore and crack, the matrix sillar forcing oil-displacing agent to enter not involve, start surplus oil wherein, improve the sweep efficiency of oil-displacing agent, can oil recovery factor be increased substantially.
Embodiment 12, on the basis of embodiment 9, in the present embodiment, the per-cent of each component is: the breaking glue solution of 0.4%, the cosurfactant of 0.01%, all the other are on-the-spot inject water or local water, and cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
Cosurfactant also can be that polyoxyethylene nonylphenol ether is a kind of.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
The present embodiment adjusting driving agnet surface tension is lower, for oil recovering, can increase substantially oil recovery factor.
Embodiment 13, based on the preparation method of the adjusting driving agnet of breaking glue solution, its technical process and for improve oil recovery factor technique see Fig. 1, comprise the following steps:
1) viscous water clean fracturing fluid 1 through truck-mounted blender 3 by fracturing truck 4 pressurize inject oil well 5, oil reservoir is pressed off, formed crack; Then the viscous water clean fracturing fluid 1 with propping agent 2 is injected the crack pressed off.Construction terminates rear closing well 1-2 hour, waits for viscous water clean fracturing fluid completely broken glue in the earth formation.
2), after viscous water clean fracturing fluid breaks glue in the earth formation completely, drive a well open flow 8 breaking glue solution, and breaking glue solution returns and ejects from oil well 5.
3) breaking glue solution 9 of the row of returning is filtered after 10 through desanding, carry out Concentration Testing 11, measuring the breaking glue solution concentration obtained is 0.3%, calculate the content of breaking glue solution, be the breaking glue solution of 0.25%, the cosurfactant of 0.006% according to weight percent, all the other ratios for on-the-spot injection water add cosurfactant 12 and oilfield injection water, obtain adjusting driving agnet 13.
4) adjusting driving agnet 13 is for improving oil recovery factor, is specially, and adjusting driving agnet 13 is entered note 27-48# water injection well 7 through waterflood pump 14 and waterflood-transmission line 17, and waterflood pump 14 is provided with under meter 15 and tensimeter 16.Adjusting driving agnet 13 enters oil well 5 through water injection well 7, changes the rock surface of oleophylic in oil well 5 into slightly water-wet surface, reduces capillary force, activation residual crude oil, and extraction crude oil, adding of adjusting driving agnet 13, improves oil recovery factor; In adjusting driving agnet 13, the weight percent of each component is breaking glue solution 0.1%-0.4%, cosurfactant 0.004%-0.01%, and all the other are oilfield injection water.
5) the corresponding three mouthfuls of oil wells 5 of 27-48# water injection well 7, are respectively 28-48#, 28-49#, 27-49#, record oil well day water ratio, day petroleum production, the track record cycle reaches 1-12 month.By producing the change of aquatic products oil mass before and after metering measure, calculating oil recovery factor increment, investigating the effect of this adjusting driving agnet.Before and after this adjusting driving agnet uses, effect comparison data are as shown in table 4.
Effect comparison before and after table 4 adjusting driving agnet uses
In the present embodiment, cosurfactant is polyoxyethylene nonylphenol ether.
Cosurfactant also can be that Sodium dodecylbenzene sulfonate and sodium lauryl sulphate two kinds are with 1:1 ratio combination.
Cosurfactant also can be sodium laurylsulfonate and sodium lauryl sulphate, two kinds with 1:1 ratio combination.
The present embodiment utilizes the breaking glue solution of the row of returning and on-the-spot oilfield injection water to make adjusting driving agnet, this adjusting driving agnet directly can inject water injection well, enter oil well through water injection well to have an effect, make the recovery of breaking glue solution, the preparation of adjusting driving agnet and use integration, not only reduce environmental protection pressure, reduce treatment cost of waste liquor, and improve utilization ratio and the use value of breaking glue solution, there is very high economic benefit and social benefit.
The embodiment of the present invention adopts clean fracturing fluid viscosifying agent G9 and G5 two kinds of systems.Breaking glue solution adopts and adds gel breaker as the breaking glue solution after the broken glue such as kerosene, water, ethanol, crude oil by viscous water clean fracturing fluid, effectively can destroy the micellar structure of viscous water clean fracturing fluid, thus reduce of the fracturing fluid viscosity.
Cosurfactant in adjusting driving agnet of the present invention can produce with breaking glue solution and act synergistically, and after adjusting driving agnet enters oil well, can change the rock surface of oleophylic into slightly water-wet surface, make interfacial tension between profit be reduced to 10
-3-10
-4mNm
-1, improve displacement efficiency, reduce capillary force, activation surplus oil; Simultaneously oil-displacing agent particle can block macropore and crack, and the matrix sillar forcing oil-displacing agent to enter not involve, starts surplus oil wherein, improve the sweep efficiency of oil-displacing agent.Adjusting driving agnet of the present invention has displacement of reservoir oil advantage integrated with transfer drive concurrently, contributes to increasing substantially oil recovery factor.
Claims (6)
1. based on the adjusting driving agnet of breaking glue solution, it is characterized in that, comprising weight percent is the breaking glue solution of 0.1%-0.4% and the cosurfactant of 0.004%-0.01%, and all the other are oilfield injection water.
2., as claimed in claim 1 based on the adjusting driving agnet of breaking glue solution, it is characterized in that, described cosurfactant is one or more in Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, sodium laurylsulfonate and polyoxyethylene nonylphenol ether.
3., as claimed in claim 1 based on the adjusting driving agnet of breaking glue solution, it is characterized in that, described breaking glue solution refer to break glue by viscous water clean fracturing fluid a kind of pressure break of adding in crude oil, kerosene, water and ethanol return the supernatant liquor of discharge opeing after sedimentation filtration.
4., as claimed in claim 3 based on the adjusting driving agnet of breaking glue solution, it is characterized in that, described viscous water clean fracturing fluid refers to the clean fracturing fluid be made up of viscoelastic surfactant; Described viscoelastic surfactant refers to one or more in chain alkyl trimethyl ammonium chloride, two eicosyl trimethyl ammonium chloride, longer chain fatty acid quaternary ammonium salt, erucicamide trimethyl-glycine, cocounut oil acid amide trimethyl-glycine.
5. based on the preparation method of the adjusting driving agnet of breaking glue solution, it is characterized in that, comprise the following steps:
Step 1, reclaims the breaking glue solution of the row of returning;
Step 2, adds cosurfactant and oilfield injection water in the breaking glue solution reclaimed, and the obtained adjusting driving agnet of mixing, the weight percent of each component is breaking glue solution 0.1%-0.4%, cosurfactant 0.004%-0.01%, and all the other are oilfield injection water.
6., as claimed in claim 5 based on the preparation method of the adjusting driving agnet of breaking glue solution, it is characterized in that: the particle size distribution range of described adjusting driving agnet is 600nm-800nm.
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Effective date of registration: 20201027 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710016 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |