CN106014332B - A kind of low-permeability oilfield coupling transfer drive method - Google Patents
A kind of low-permeability oilfield coupling transfer drive method Download PDFInfo
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- CN106014332B CN106014332B CN201610422779.5A CN201610422779A CN106014332B CN 106014332 B CN106014332 B CN 106014332B CN 201610422779 A CN201610422779 A CN 201610422779A CN 106014332 B CN106014332 B CN 106014332B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008878 coupling Effects 0.000 title description 9
- 238000010168 coupling process Methods 0.000 title description 9
- 238000005859 coupling reaction Methods 0.000 title description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000004048 modification Effects 0.000 claims abstract description 15
- 238000012986 modification Methods 0.000 claims abstract description 15
- 238000011049 filling Methods 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 6
- 230000007423 decrease Effects 0.000 claims abstract description 6
- 230000003190 augmentative effect Effects 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 235000020681 well water Nutrition 0.000 claims abstract description 5
- 239000002349 well water Substances 0.000 claims abstract description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- WXHLLJAMBQLULT-UHFFFAOYSA-N 2-[[6-[4-(2-hydroxyethyl)piperazin-1-yl]-2-methylpyrimidin-4-yl]amino]-n-(2-methyl-6-sulfanylphenyl)-1,3-thiazole-5-carboxamide;hydrate Chemical compound O.C=1C(N2CCN(CCO)CC2)=NC(C)=NC=1NC(S1)=NC=C1C(=O)NC1=C(C)C=CC=C1S WXHLLJAMBQLULT-UHFFFAOYSA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- -1 alkyl phenol Chemical compound 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- RNIHAPSVIGPAFF-UHFFFAOYSA-N Acrylamide-acrylic acid resin Chemical compound NC(=O)C=C.OC(=O)C=C RNIHAPSVIGPAFF-UHFFFAOYSA-N 0.000 claims description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 239000011159 matrix material Substances 0.000 abstract description 7
- 238000003756 stirring Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 24
- 238000005516 engineering process Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000002981 blocking agent Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229920006243 acrylic copolymer Polymers 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical group NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 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
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Chemistry (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
Abstract
The invention discloses a kind of low-permeability oilfields to couple transfer drive method, and steps are as follows：Step 1）It takes water plugging profile control agent to be uniformly added to carry in liquid, the addition of water plugging profile control agent is carry liquid mass percent 0.1 0.3%, stirs evenly after mixing, forms stable suspension emulsion；Step 2）Service shaft well head is opened, which is passed through under transfer drive pump truck injection well；Step 3）Responding curve of well after injection operation continues water injection work, and suspension emulsion reacts under the promotion of following injected water in reservoir vertical-depth, achievees the purpose that transfer drive augmented injection；Step 4）After water filling 60 days, according to profile modification, when profile modification unobvious, i.e., water injection pressure, which does not reduce, or periphery corresponds to well water does not have decline or oil production not to improve, and repeats above-mentioned 13 step, stops when well group profile modification is apparent；Step 5）Construction terminates.This method not only reaches the water plugging and profile controlling to water logging crack, and improves the effect of the water injection rate and the displacement of reservoir oil of matrix reservoirs.
Description
Technical field
The present invention relates to profile control, increasing injection and the technology of reservoir sweep fields used in oil exploitation, specifically relate to
A kind of low-permeability oilfield coupling transfer drive method of suitable low permeability sandstone reservoirs.
Background technology
In the development process of low-permeability oilfield, waterflooding extraction is that current the most successful one raising efficiently, economic is adopted
Yield technology.In the injecting process in oil field, interlayer caused by injecting water is gradually shown with horizontal contradiction in the water filling middle and later periods in layer
Expose, become apparent particularly with the compact reservoir in crack, microcrack development, for example, the shape of injection water coning, well pattern waterline
At etc., cause the rising of low-permeability oilfield development cost and the decline of recovery ratio.For these problems, generally require using water blockoff tune
The technology cutd open blocks big pore throat and crack.Meanwhile low-permeability oilfield can face another question again, be exactly water injection well
" shorting " problem, that is, practical water injection rate cannot reach " daily water-injection rate " of oil field development setting, make the reservoir energy of oil field development
Effectively it cannot be supplied and be supplemented, influenced correspondence and declined by effect oil well and well group yield, maximally efficient technology is exactly
Increasing injection technology reduces the water injection pressure of water injection well, improves water injection rate.
For crack and microcrack reservoir, this above-mentioned two technologies are contradictory, in the production management in oil field,
Typically according to the classification of the specific production status of oil well and water injection well, difference, individually two kinds of technologies of implementation, to solve oil field production
The principal contradiction faced.But result of this is that：Carry out this two technologies for improving flood effectiveness, result anyway
What it is to oil reservoir development is unfavorable.
Invention content
The purpose of the present invention is：A kind of low-permeability oilfield coupling transfer drive method is provided, the water blockoff to water logging crack is not only reached
Profile control, and the water injection rate of matrix reservoirs is improved, improve the effect of the displacement of reservoir oil of whole heterogeneous reservoir.
The technical scheme is that：A kind of low-permeability oilfield coupling transfer drive method, it is characterized in that：The specific steps of this method
It is as follows：
Step 1）It takes water plugging profile control agent to be uniformly added to carry in liquid, the addition of water plugging profile control agent is to carry liquid quality hundred
The 0.1-0.3% for dividing ratio, stirs evenly after mixing, forms stable suspension emulsion；
Step 2）Service shaft well head is opened, which is passed through under transfer drive pump truck injection well；
Step 3）Responding curve of well after injection operation, continues water injection work, suspension emulsion is pushed away following injected water
It is reacted in reservoir vertical-depth under dynamic, achievees the purpose that transfer drive augmented injection；
Step 4）After water filling 60 days, according to profile modification, when profile modification unobvious, i.e., water injection pressure not reduce or
Periphery corresponds to well water, and decline or oil production do not improve, and above-mentioned 1-3 steps are repeated, until well group profile modification is bright
Stop when aobvious；
Step 5）Construction terminates.
The step 1）In water plugging profile control agent be acrylamide-acrylic acid copolymer, molecular weight 1000-1200 ten thousand, this is stifled
Agent is conventional products, and commercially available producer is more, such as Ming Tai Chemical Co., Ltd.s of Henan Province, postcode 457600.
The step 1）In carrying liquid be made of the raw material of following mass percents：0.3% long-chain carboxylic acid's salt Shuangzi table
Face activating agent, 0.1% sulfosalicylic acid, 0.2% alkyl phenol polyethenoxy ether sodium sulfate and 99.4% clear water.
The step 1）In water plugging profile control agent grain size 80-200 mesh.
The molecular structural formula of long-chain carboxylic acid's salt Gemini surface active agent is as follows：
Wherein, R C16-18.
The step 4）Middle water filling 60 days is a cycle.
The step 1）In carrying liquid interfacial tension be less than 1 × 10-3MN/m, surface tension are less than 20 mN/m.
The beneficial effects of the invention are as follows：Realize that water plugging and profile controlling, increasing injection and technology of reservoir sweep are effectively united using functional material
One.Pass through the continuous variation of the multi-parameters such as injection process viscosity of material, state, flow resistance, wetability, flowing pressure, adjustment
Water is injected to advantageous azimuthal flow, and entire fluid flow field is a kind of energy automatic coupling, flow direction auto-steering, fluid pressure
The self balancing process of power, reduces the injected water volume for flowing to macropore, and expansion flows to the hypotonic hypotonic area not employed.Utilize the party
Method not only reaches the water plugging and profile controlling to water logging crack, and improves the water injection rate of matrix reservoirs, improves whole heterogeneous reservoir
The effect of the displacement of reservoir oil.
With reference to embodiment, the present invention is described further, but not as a limitation of the invention.
Specific implementation mode
Embodiment 1
A kind of low-permeability oilfield coupling transfer drive method, it is characterized in that：This method is as follows：
Step 1）It takes water plugging profile control agent to be uniformly added to carry in liquid, the addition of water plugging profile control agent is to carry liquid quality hundred
The 0.1-0.3% for dividing ratio, stirs evenly after mixing, forms stable suspension emulsion；
Step 2）Service shaft well head is opened, which is passed through under transfer drive pump truck injection well；
Step 3）Responding curve of well after injection operation, continues water injection work, suspension emulsion is pushed away following injected water
It is reacted in reservoir vertical-depth under dynamic, achievees the purpose that transfer drive augmented injection；
Step 4）After water filling 60 days, according to profile modification, when profile modification unobvious, i.e., water injection pressure not reduce or
Periphery corresponds to well water, and decline or oil production do not improve, and above-mentioned 1-3 steps are repeated, until well group profile modification is bright
Stop when aobvious；
Step 5）Construction terminates.
Embodiment 2
A kind of low-permeability oilfield coupling transfer drive method is as follows：
Step 1）It takes water plugging profile control agent to be uniformly added to carry in liquid, the addition of water plugging profile control agent is to carry liquid quality hundred
The 0.1-0.3% for dividing ratio, stirs evenly after mixing, forms stable suspension emulsion；The water plugging profile control agent is acrylamide
Acrylic copolymer, the grain size 80-200 mesh of water plugging profile control agent.The carrying liquid is the raw material group by following mass percents
At：0.3% long-chain carboxylic acid's salt Gemini surface active agent, 0.1% sulfosalicylic acid, 0.2% alkyl phenol polyethenoxy ether sodium sulfate and
99.4% clear water；Wherein, the molecular structural formula of long-chain carboxylic acid's salt Gemini surface active agent is as follows：
Wherein, R C16-18.
Step 2）Service shaft well head is opened, which is passed through under transfer drive pump truck injection well；
Step 3）Responding curve of well after injection operation, continues water injection work, suspension emulsion is pushed away following injected water
It is reacted in reservoir vertical-depth under dynamic, achievees the purpose that transfer drive augmented injection；
Step 4）After water filling 60 days, according to profile modification, when profile modification unobvious, i.e., water injection pressure not reduce or
Periphery corresponds to well water, and decline or oil production do not improve, and above-mentioned 1-3 steps are repeated, until well group profile modification is bright
Stop when aobvious；Wherein, water filling 60 days is a cycle.
Step 5）：Construction terminates.
The interfacial tension of the carrying liquid of the present invention is less than 1 × 10-3MN/m, surface tension are less than 20 mN/m, and PH is 6.0-
6.8,25 DEG C of viscosity are less than 5mPa.s.
The principle of the present invention is：Water plugging and profile controlling process：It is noted by the normal pump of water injection well, carries water shutoff material and enter well.Note
Enter fluid in the flow process of oil reservoir oil displacement, the group of water shutoff material becomes polyacrylamide acrylic copolymer, due to grain size
It is far longer than sandstone matrix pore throat, venturi cannot be entered or blocks the oil storage space of sandstone intergranular pore flowing, but with injection
Flow forms the accumulation of granular blocking agent to the depths of rock fracture, at the narrower place in crack or other bifurcations in crack, is formed
It blocks, increases the flow resistance of water, injection water is made to be flowed to other directions.
Increasing injection process：The long-chain carboxylic acid's salt Gemini surface active agent carried in liquid is a kind of weakly acidic special surface
Activating agent, have the function of it is a variety of be conducive to improve displacement of reservoir oil by filling water efficiency, to realize injection water displacement efficiency.1. washing oil and
Non-emulsified function, you can more easily to remove crude oil from matrix pore throat space, but do not have emulsifying capacity；2. having ultralow interface
Tension improves Flooding Efficiency；3. there is larger thickening function to injection water, but injection water is thickened after meeting crude oil, puddle
There is the viscosity of the injection water of oil composition quickly to drop to the original viscosity of injection water.Using technical characterstic, for reservoir matrix
The gap region of big channel and reservoir development, due to injecting repeatedly washing away for water early period, the oil content of flow surface reduces, and increases
Viscous injection water is always maintained at its higher viscosity, improves the flow resistance of the flowing space, make more due to that cannot puddle crude oil
Injection water to the unimplanted space of more low flow resistance shunt, formed stratum in fluid in the multi-faceted complexity such as flow, flow direction
The automatic coupling of seepage field balances, and improves the oil displacement efficiency of content.4. using the separation sewage of crude oil（Reduce divalent, three
Valence ion concentration）, Efficient Adhesive Promotion is more preferable, and oil displacement efficiency is more preferable；The surfactant has the function of that mineral ion improves its viscosity,
And material also has certain ion complexation ability, preferably sewage can be made to turn waste into wealth.5. compatibility is good, with reservoir stream
Body, host rock and oil field major part agent material are not incompatible phenomenon.6. faintly acid injects water, water filling can be removed
The inorganic scale and organic deposition of well perforated interval and near wellbore zone；Long-term injection can be expanded with clay cement between corrosion feldspar and sand grains
The oozing property of hole of big nearly well reservoir, reduces water injection pressure.
The water plugging profile control agent acrylic acid and polyacrylamide copolymer of the present invention is a kind of hydroexpanding body material, water-swellable rate
More than 5 times；Blocking agent accumulation breaks through intensity and is more than 10MPa.The blocking agent is carrying liquid（PH6-6.8 faintly acids）In do not expand or expand
Rate is less than 1 times.Acrylic acid and polyacrylamide copolymer prior art preparation are directly bought from market.
Effect explanation：
After construction, after continuing water filling 3 months, it is contemplated that injection pressure fall is more than 5%, corresponding oil well
Aqueous to reduce by 3% or more, oil production improves 5%.This method not only reaches the water plugging and profile controlling to water logging crack, and improves matrix storage
The water injection rate of layer improves the effect of the displacement of reservoir oil of whole heterogeneous reservoir." illustrated with actual data, effect of the invention
It is good.
Raw material in the present invention can directly be bought from market, can also be from the limited public affairs of Shaanxi friendly nation petroleum works technology
Department buys.The part that the present embodiment does not describe in detail belongs to the common knowledge of the industry, may search on the net, differs here
One narration.
Claims (4)
1. a kind of low-permeability oilfield couples transfer drive method, it is characterized in that：This method is as follows：
Step 1) takes water plugging profile control agent to be uniformly added and carries in liquid, and the addition of water plugging profile control agent is to carry liquid mass percent
0.1-0.3%, stirred evenly after mixing, form stable suspension emulsion；
Step 2) opens service shaft well head, which is passed through under transfer drive pump truck injection well；
Step 3) injects responding curve of well after operation, continues water injection work, suspension emulsion is under the promotion of following injected water
It is reacted in reservoir vertical-depth, achievees the purpose that transfer drive augmented injection；
After step 4) water filling 60 days, according to profile modification, when profile modification unobvious, i.e., water injection pressure does not have reduction or periphery
Corresponding well water does not decline or oil production does not improve, and above-mentioned 1-3 steps is repeated, when well group profile modification is apparent
Stop；
Step 5) construction terminates；
Water plugging profile control agent in the step 1) is acrylamide-acrylic acid copolymer；
Carrying liquid in the step 1) is made of the raw material of following mass percents：0.3% long-chain carboxylic acid's salt Shuangzi surface
Activating agent, 0.1% sulfosalicylic acid, 0.2% alkyl phenol polyethenoxy ether sodium sulfate and 99.4% clear water；
The molecular structural formula of long-chain carboxylic acid's salt Gemini surface active agent is as follows：
Wherein, R C16-18.
2. a kind of low-permeability oilfield according to claim 1 couples transfer drive method, it is characterized in that：Water blockoff in the step 1)
The grain size 80-200 mesh of profile control agent.
3. a kind of low-permeability oilfield according to claim 1 couples transfer drive method, it is characterized in that：Water filling 60 in the step 4)
It is a cycle.
4. a kind of low-permeability oilfield according to claim 1 couples transfer drive method, it is characterized in that：Carrying in the step 1)
The interfacial tension of liquid is less than 1 × 10-3MN/m, surface tension are less than 20mN/m.
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| CN201610422779.5A CN106014332B (en) | 2016-06-16 | 2016-06-16 | A kind of low-permeability oilfield coupling transfer drive method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
| CN101993684A (en) * | 2009-08-14 | 2011-03-30 | 中国石油天然气股份有限公司 | Temporary acidizing plugging agent for low-permeability oilfield water injection well |
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Water plugging shielding method for low-permeability fractured reservoir oil well |
| CN104481480A (en) * | 2014-12-04 | 2015-04-01 | 中国石油天然气股份有限公司 | Oil well deep selective water plugging method and plugging agent solution used in same |
-
2016
- 2016-06-16 CN CN201610422779.5A patent/CN106014332B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280678A (en) * | 2008-05-09 | 2008-10-08 | 大庆汇联技术开发有限公司 | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process |
| CN101993684A (en) * | 2009-08-14 | 2011-03-30 | 中国石油天然气股份有限公司 | Temporary acidizing plugging agent for low-permeability oilfield water injection well |
| CN103321606A (en) * | 2013-07-02 | 2013-09-25 | 中国石油集团川庆钻探工程有限公司 | Water plugging shielding method for low-permeability fractured reservoir oil well |
| CN104481480A (en) * | 2014-12-04 | 2015-04-01 | 中国石油天然气股份有限公司 | Oil well deep selective water plugging method and plugging agent solution used in same |
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Denomination of invention: A coupling profile control and displacement method for low permeability oilfield Effective date of registration: 20201224 Granted publication date: 20180731 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI YOUBANG PETROLEUM ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2020990001495 |
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Denomination of invention: A coupling profile control and flooding method in low permeability oilfield Effective date of registration: 20220506 Granted publication date: 20180731 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI YOUBANG PETROLEUM ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2022610000220 |
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Denomination of invention: A Coupled Flooding Control Method for Low Permeability Oilfield Effective date of registration: 20230425 Granted publication date: 20180731 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI YOUBANG PETROLEUM ENGINEERING TECHNOLOGY Co.,Ltd. Registration number: Y2023610000320 |
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