CN104453770B - Method for implementing selective water plugging in deep part of oil well by using waste diapers - Google Patents
Method for implementing selective water plugging in deep part of oil well by using waste diapers Download PDFInfo
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- CN104453770B CN104453770B CN201410729022.1A CN201410729022A CN104453770B CN 104453770 B CN104453770 B CN 104453770B CN 201410729022 A CN201410729022 A CN 201410729022A CN 104453770 B CN104453770 B CN 104453770B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002699 waste material Substances 0.000 title claims abstract description 34
- 239000003129 oil well Substances 0.000 title abstract description 8
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 53
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000003921 oil Substances 0.000 claims abstract description 43
- 229920005989 resin Polymers 0.000 claims abstract description 40
- 239000011347 resin Substances 0.000 claims abstract description 40
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 35
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000010779 crude oil Substances 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000002283 diesel fuel Substances 0.000 claims abstract description 19
- 239000003960 organic solvent Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims abstract description 9
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 239000002981 blocking agent Substances 0.000 claims description 51
- 239000012046 mixed solvent Substances 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003995 emulsifying agent Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 abstract description 6
- 230000002745 absorbent Effects 0.000 abstract description 6
- 239000008096 xylene Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 17
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 2
- 229920000247 superabsorbent polymer Polymers 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- JYAXYNMOHKXUNL-UHFFFAOYSA-N [Na].C=CC#N Chemical compound [Na].C=CC#N JYAXYNMOHKXUNL-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- 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
- C09K8/502—Oil-based compositions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geochemistry & Mineralogy (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing Of Solid Wastes (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention relates to a method for implementing selective water plugging in deep parts of oil wells by using waste diapers, which comprises the following steps: preparing a plugging agent solution: adding 10 parts by weight of resin particles in the waste diaper into 5-15 parts by weight of organic solvent, stirring and dissolving at 40-60 ℃, adding 10-200 parts by weight of diesel oil, and stirring and mixing to obtain a plugging agent solution; wherein the organic solvent is selected from one or more of toluene, xylene, methyl acetate, ethyl acetate and acetone; adding the plugging agent solution into the carrier fluid by taking diluted crude oil as the carrier fluid to obtain plugging agent oil, and extruding the plugging agent oil into the stratum from the oil sleeve annulus; ejecting the plugging agent oil liquid into the deep part of the stratum by using a displacement liquid; and closing the well for 1-2 days, and normally opening the well for production. The invention utilizes the super absorbent resin in the waste diaper to selectively block water in the deep part of the oil well, can effectively control water outlet in a water layer, and does not pollute and damage an oil layer.
Description
Technical field
The present invention relates to a kind of well deep part selective water plugging method, be specifically related to one and utilize waste and old diaper to implement oil
The method of layer depth portion selective water plugging, belongs to Water in Water Shutoff in Oil Field field.
Background technology
Oilwell water shutoff refers to control the output of water from oil well, its objective is to improve the production efficiency of oil well.Chemical water shutoff is just
It is to water-yielding stratum injectionization blocking agent on ground, utilizes the blocking agent product reservoir plugging with the physical and chemical reaction of oil reservoir generation
Method.Oil-soluble resin water-plugging technique is to utilize oil-soluble resin can be dissolved in crude oil but meets water formation granulated substance and play blocking work
Principle, reach the purpose of the stifled oil of water blockoff, there is certain selectivity.Correlational study about oil-soluble resin water shutoff agent
As follows:
" research of Oil-Soluble Resin Temporary Plugging Agent " (Li Kehua, Zhao Xiutai, western mine locating work, 2001, S1) disclose use
Oil-Soluble Resin Temporary Plugging Agent is the important method of a kind of reservoir protec-tion, and it is that the oil-soluble utilizing resin reaches oil-gas Layer
The most stifled purpose." water base oil-soluble blocking agent desk research " (fourth is sharp, Meng Fantao, oilfield chemistry, 2001,2) discloses employing drip
Water base oil-soluble blocking agent prepared by blue or green, oil-soluble resin and suitable modifying agent has also carried out Experimental comparison's investigation, rock to its performance
The heart test result indicate that, the water plugging property of water base oil-soluble blocking agent is better than activity viscous crude, better than aqueous gel blocking agent, softening point
Close to or below the blocking agent of rock core (stratum) temperature, average diameter of particles can be more than rock core pore mean diameters, and softens
During higher than rock core (stratum) temperature more than 20 DEG C of point, the granule that diameter is less than rock core pore diameter could enter rock core hole and play
The softening point of plugging action, Colophonium and Petropols can raise owing to adding the material being difficult to soften, it is possible to owing to adding oil
Class material and reduce." research of oil emulsion soluble resin selective blocking adjustment and application " (huge Deng Feng, Xie Gang etc., petroleum geology
With engineering, 2012,5:119-122) disclose a kind of oil-soluble resin plugging agent, this plugging agent can mix with the water of arbitrary proportion
Molten, there is good mobility, be readily injected into stratum, after entering stratum, oil-soluble resin granule generation gathering formation dough is blocked up
Space shared by plug, or it is attached to rock surface, change the wettability of rock surface, form the mechanical blockage to current, it is achieved
Reduce the purpose producing water incremental oil production.
Although prior art utilizes oil-soluble resin can partly solve the problem of selective water plugging as blocking agent, but these
The shortcoming of existing oil-soluble resin blocking agent is: blocking agent core exists in solid form, it is impossible to reach oil reservoir deep, it is impossible to carry out oil
The selective water plugging of layer depth portion.
On the other hand, diaper (pad or sheet) is commonly called as " diaper " and has become as and be only second to newspaper and food and drink packaging
The third-largest rubbish source.Diaper material in the market is a class super absorbent resin, mostly cannot biodegradation, according to mesh
Front landfill disposal mode, on needs, a century could rot, and a baby is at association's oneself " crouching toilet " front average needs 3600
Sheet wet diaper, under the historical conditions of China baby high natality now, its huge pollution bringing environment is well imagined.Urine
The wettest making raw material is mainly oil product, and external many employing chemical methodes extract methane or plastics from diaper now,
In terms of energy resource consumption angle, environment can be brought secondary pollution.The most how to utilize waste and old diaper, turned waste into wealth,
Reduce environmental pollution, be a problem being worth research.
Super absorbent resin in diaper, can absorb pure water or the saline of sole mass tens to hundred times, extensively
General for agriculture and forestry production, urban landscaping, drought-resistant water-preserving, defend and control sand, and play huge effect；This kind of high-hydroscopicity
Resin applies also for many fields such as health care, oil exploitation, construction material, transportation.Additionally, due to this kind of high suction
Can be formed after water-base resin water suction and there is certain viscoelastic gelinite, there is certain intensity and toughness, the most progressively
It is applied to oil-gas field development field, is mainly used as water plugging profile control agent, sealing agent (Wang Zhengliang, Wang Xiaojuan, Ding Tao, petroleum gas
Journal, in March, 2011 volume 33 the 3rd phase P138).But the studies above, it is important that in aspect researchs such as salt-resistance, temperature impacts,
Valuable product, it is impossible to large-scale promotion application.
Through looking into, and find the technology report applying super absorbent resin to carry out the selective water plugging of oil reservoir deep.
Summary of the invention
A kind of High hydrophilous resin utilized in waste and old diaper of offer is provided and carries out oil reservoir deep
The method of selective water plugging.
Another object of the present invention is to provide a kind of blocking agent solution for the selective water plugging of oil reservoir deep.
For reaching above-mentioned purpose, a kind of method that the invention provides well deep part selective water plugging, the method mainly profit
Implement the selective water plugging of oil reservoir deep with the High hydrophilous resin in waste and old diaper, the High hydrophilous resin in waste and old diaper is joined
Make the mixed liquor of organic solvent or farther include the mixed liquor of diesel oil, then with crude oil and/or diesel oil blending transportation to oil
Layer depth portion realizes selective water plugging.
Specifically, a kind of method that the invention provides well deep part selective water plugging, the method comprising the steps of:
(1) preparation blocking agent solution: the resin particle in the 10 waste and old diapers of weight portion is joined 5～15 weight portions organic
In solvent, 40～60 DEG C of stirring and dissolving, obtain blocking agent solution；Or the diesel oil of further addition 10～200 weight portions, stirring mixing,
Obtain blocking agent solution；Wherein said organic solvent one or many in toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone
Kind；
(2) with dilute crude oil and/or diesel oil for carrying liquid, blocking agent solution step (1) prepared is according to the most waste and old urine not
Resin particle in wet accounts for and carries the amount of liquid weight 0.8%～2.5% and add and carry in liquid, obtains blocking agent fluid, and by blocking agent oil
Liquid clamp-ons stratum from oil jacket annular space；
(3) with displacement fluid, the blocking agent fluid that step (2) is injected is headed into earth formation deep；
(4) closing well 1～2 days, normal opening well and making production.
Resin particle in waste and old diaper, main component is super absorbent polymer (Superabsorbent
Polymers, is called for short SAP, is also super absorbent resin, super-strong moisture absorbing machine, high water absorbency polymer), it is that a class can absorb also
Retaining the new functional macromolecule material wanting very large many liquid relative to itself quality, the most common type is to cause
Mixed by acrylic acid and sodium hydroxide in the presence of agent and carry out polymerization to generate sodium polyacrylate (sometimes referred to as acrylonitrile sodium),
Also there are other materials, such as polyacrylamide analog copolymer, ethylene and copolymer-maleic anhydride, cross-linked carboxymethyl cellulose, gather
Ethenol copolymer, cross-linked polyethylene oxide and starch-grafted polyacrylonitrile copolymer etc..Mainly by useless in the present invention
In old diaper, the high-hydroscopicity of these materials, turns waste into wealth, when specifically applying, and the waste and old diaper of recyclable different brands.
In the method for the present invention, use the resin particle in waste and old diaper, be configured to liquid in advance, then with crude oil and/
Or diesel oil (in order to reduce cost, the dilutest crude oil) carries to oil reservoir deep, in the case of having a large amount of water, from crude oil and/or
In diesel oil separate out imbibition formed solid blocking, exhalant canal can be blocked for a long time, oil discharge passage High hydrophilous resin not
Can expand, can be along with crude oil output, during output, meet a large amount of formation water, still can absorb water formation solid blocking, reaches choosing
The purpose of selecting property water blockoff.Water-absorbing resins is based on blocking, and initial stage plugging strength is high, can gradually dissolve and lose work in water
With.
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, wherein said
The preferred mixed solvent of organic solvent, such as the benzene mixed of toluene Yu dimethylbenzene, for reducing cost, this benzene mixed can directly be purchased and obtain
?；Particularly preferably volume ratio is dimethylbenzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: acetic acid
Ethyl ester: the mixed solvent of acetone=1:2:1, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume
Ratio is for dimethylbenzene: ethyl acetate: the mixed solvent of acetone=2:4:1, makes the resin particle in waste and old diaper molten in this mixing
After agent is dissolved, then mix with crude oil and/or diesel oil, it is possible to obtain Solid Free water shutoff agent.In blocking agent solution, selectivity adds
Diesel oil primarily to enable blocking agent solution when application preferably with carry liquid and mix homogeneously, blocking agent is greatly lowered and glues
Degree, improves pumping into property.The described liquid that carries can be dilute crude oil and/or diesel oil, and the dilutest crude oil, it can reduce compared to diesel oil
Cost.
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, described dilute crude oil
For the crude oil below viscosity 100mPa.s.
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, step is taken in (2)
The water-in-oil emulsifier of liquid weight 0.5-1%, such as oleic acid etc. are carried with liquid being also added with account for.
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, inject stratum
Blocking agent oil liquid temperature 60～80 DEG C.
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, blocking agent fluid is noted
The consumption entering stratum is 50～180m3。
According to specific embodiments of the present invention, in the well deep part selective water plugging method of the present invention, top in step (3)
Being crude oil, clear water or oil field recharged waste water for liquid, its consumption is 100～500m3.Displacement fluid consumption employed in the present invention is relatively
General water blockoff displacement fluid usage amount is big, its object is to make blocking agent fluid can enter oil reservoir deep, to reach the mesh of deep water blockoff
's.
On the other hand, the invention provides a kind of blocking agent solution, this preparation blocking agent solution is the resin in waste and old diaper
The mixed liquor of granule and organic solvent or farther include the mixed liquor of diesel oil, wherein, with the resin particle in waste and old diaper
Being 10 weight portion meters, organic solvent is 5～15 weight portions, and the diesel oil farther included is 10～200 weight portions；Wherein said
One or more in toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone of organic solvent, preferred volume ratio is diformazan
Benzene: methyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixing of acetone=1:2:1 is molten
Agent, volume ratio are toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 and volume ratio are dimethylbenzene: ethyl acetate: acetone
The mixed solvent of=2:4:1.Specifically, the blocking agent solution of the present invention is prepared in accordance with the following methods and is obtained: by 10 weight
Resin particle in the waste and old diaper of part joins in 5～15 weight parts organic solvent, and 40～60 DEG C of stirring and dissolving obtain blocking agent molten
Liquid；Or the diesel oil of further addition 10～200 weight portions, stirring mixing, obtain blocking agent solution.
In the present invention, described " deep " refers to Novel technique of in-depth profile control field, typically, and can be with near wellbore zone district
Separately, more than 10 meters or treating capacity can be defined as deep more than 1000 sides to treatment radius.
In sum, the invention provides a kind of resin particle utilized in waste and old diaper and implement oil reservoir deep selectivity
The method of water blockoff.The present invention has the advantage that
(1) low cost, raw material sources are wide, Environmental Safety.
(2) without solid particle in blocking agent, it is possible to achieve deep water blockoff.
(3) imbibition, selectivity is strong, can water-soluble degrade, pollution-free to stratum.
(4) former tubing string construction, technique is simple.
Detailed description of the invention
Enforcement and the beneficial effect of generation of technical solution of the present invention is described in detail, it is intended to side below by way of specific embodiment
Reader is helped to be more fully understood that essence and the feature of the present invention, not as can the restriction of practical range to this case.
The preparation of embodiment 1 blocking agent solution and evaluation
The waste and old wet diaper granule (mainly high-hydroscopicity sodium polyacrylate) recovery obtained is added separately to by table one
In scheme k～n in each mixed solvent, it is heated to 40 DEG C～60 DEG C, stirring and dissolving.Experiment shows, waste and old wet diaper granule can be
Rapid solution in each mixed solvent of table one, does not separates out after being cooled to room temperature.Production time efficiency can be improved.
The each component proportion of table one, mixed solvent
Embodiment 2
Joyous western oil field well, 1088.50 meters～1115.00 meters 19 meters/4 layers, the 13rd steam injection.Mean permeability
2913.1mD (millidarcy), day production fluid 53.7m3, day oil-producing 1.1 tons, aqueous 98%.Oil well High water cut, determines to take oil reservoir deep
Portion's selective water plugging.
Implement step as follows:
1, reclaiming waste and old diaper, the fabric outside the waste and old diaper of strip off, (mainly high-hydroscopicity gathers to take out implant
The super absorbent resin such as sodium acrylate, starch-grafted polyacrylonitrile copolymer), dry standby；
2, the preparation of blocking agent solution: organic solvent is that dimethylbenzene, ethyl acetate and acetone mix according to volume ratio 2:4:1
The mixed liquor arrived, heating in water bath to 50 DEG C, dries standby waste and old diaper filler particle join above-mentioned for 10 weight portions
In organic solvent described in 10 weight portions, stirring while adding, until waste and old diaper filler particle all dissolves, add further
The diesel oil of 100 weight portions, is uniformly mixed, and obtains blocking agent solution, standby；
3,70 DEG C, crude oil 100 side of viscosity 42mPa.s of on-the-spot preparation, is in terms of 100% by the weight of crude oil, is initially charged weight
Amount is 1% oleic acid, adds the blocking agent solution prepared of 20wt%, stirs, obtain blocking agent fluid；
4, with cementing truck, blocking agent fluid is clamp-oned stratum (oil well keeps former tubing string) from oil jacket annular space；
5, with oil field recharged waste water 100 side, blocking agent fluid is replaced to oil reservoir deep；
6, closing well 2 days, normal opening well and making production.
After enforcement, day production fluid 38.9 side, day oil-producing 2.4 tons, aqueous 93.8%, tired increase oil 126 tons, precipitation 1480 side, have
102 days effect phases, effect is obvious.
Claims (10)
1. utilizing the method that waste and old diaper implements well deep part selective water plugging, the method comprising the steps of:
(1) preparation blocking agent solution: the resin particle in the 10 waste and old diapers of weight portion is joined 5～15 weight parts organic solvent
In, 40～60 DEG C of stirring and dissolving, add the diesel oil of 10～200 weight portions, stirring mixing, obtain blocking agent solution；Wherein said organic
One or more in toluene, dimethylbenzene, methyl acetate, ethyl acetate, acetone of solvent；
(2) with dilute crude oil for carrying liquid, blocking agent solution step (1) prepared is according to the resin particle in the most waste and old diaper
Account for carry liquid weight 0.8%～2.5% amount add carry in liquid, obtain blocking agent fluid, and blocking agent fluid squeezed from oil jacket annular space
Enter stratum；
Step (2) is carried liquid is also added with account for and carry liquid weight 0.5～the water-in-oil emulsifier of 1%；
(3) with displacement fluid, the blocking agent fluid that step (2) is injected is headed into earth formation deep；
(4) closing well 1～2 days, normal opening well and making production.
Method the most according to claim 1, wherein said organic solvent be volume ratio be dimethylbenzene: methyl acetate: acetone
The mixed solvent of=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are toluene:
Ethyl acetate: the mixed solvent of acetone=2:4:1 or volume ratio are dimethylbenzene: ethyl acetate: the mixing of acetone=2:4:1 is molten
Agent.
Method the most according to claim 1, wherein, described dilute crude oil is the crude oil of below viscosity 100mPa.s.
Method the most according to claim 1, wherein, described water-in-oil emulsifier is oleic acid.
Method the most according to claim 1, wherein, the middle blocking agent oil liquid temperature 60 injecting stratum of step (2)～80 DEG C.
Method the most according to claim 1, wherein, in step (2), blocking agent fluid injects the consumption on stratum is 50～180m3。
Method the most according to claim 1, wherein, in step (3), displacement fluid is crude oil, clear water or oil field recharged waste water,
Its consumption is 100～500m3。
8. a blocking agent solution, this blocking agent solution is the resin particle in waste and old diaper and organic solvent and the mixing of diesel oil
Liquid, wherein, is in terms of 10 weight portions by the resin particle in waste and old diaper, and organic solvent is 5～15 weight portions, diesel oil be 10～
200 weight portions；Wherein said organic solvent one in toluene, dimethylbenzene, methyl acetate, ethyl acetate, the acetone or
Multiple.
Blocking agent solution the most according to claim 8, wherein, described organic solvent be volume ratio be dimethylbenzene: methyl acetate:
The mixed solvent of acetone=1:2:1, volume ratio are dimethylbenzene: ethyl acetate: the mixed solvent of acetone=1:2:1, volume ratio are
Toluene: ethyl acetate: the mixed solvent of acetone=2:4:1 or volume ratio are dimethylbenzene: ethyl acetate: acetone=2:4:1's is mixed
Bonding solvent.
The most according to claim 8 or claim 9, blocking agent solution, this blocking agent solution prepares in accordance with the following methods and obtains: by 10
Resin particle in the waste and old diaper of weight portion joins in 5～15 weight parts organic solvent, 40～60 DEG C of stirring and dissolving, adds
The diesel oil of 10～200 weight portions, stirring mixing, obtain blocking agent solution.
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