CN109138944A - A kind of carbon dioxide compound throughput new method - Google Patents

A kind of carbon dioxide compound throughput new method Download PDF

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Publication number
CN109138944A
CN109138944A CN201811053768.XA CN201811053768A CN109138944A CN 109138944 A CN109138944 A CN 109138944A CN 201811053768 A CN201811053768 A CN 201811053768A CN 109138944 A CN109138944 A CN 109138944A
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CN
China
Prior art keywords
carbon dioxide
fluid
displacement fluid
villaumite
new method
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CN201811053768.XA
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Chinese (zh)
Inventor
宫淑萍
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Daqing Jinjun Petroleum Technology Development Co Ltd
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Daqing Jinjun Petroleum Technology Development Co Ltd
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Priority to CN201811053768.XA priority Critical patent/CN109138944A/en
Publication of CN109138944A publication Critical patent/CN109138944A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/164Injecting CO2 or carbonated water
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Edible Oils And Fats (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A kind of carbon dioxide compound throughput new method, the following steps are included: 1) be initially injected prepad fluid, before injecting CO_2 stimulation: prepad fluid is soluble chlorine salting liquid, the mass percent concentration 5-30% of chloride solution, prepad fluid is continuously injected into from oil sets annular space, and injection rate is 100~120m3, mainly based on self-priming, or using pump note mode, well intake pressure is no more than 10MPa;2) inject carbon dioxide injection: every meter of effective pay thickiness needs to inject 1-2.5t liquid carbon dioxide;3) displacement fluid injects: displacement fluid is mixed by hot water and soluble chlorine salting liquid, and the mass percent concentration of villaumite is 2-7% in displacement fluid, and every 1000 meters need that 10m is added3Displacement fluid.The application is the ion exchange using carbon dioxide and villaumite, and the pH value around nearly well is effectively reduced, play a dual role of while be acidified de-plugging, while the row of returning immediately.

Description

A kind of carbon dioxide compound throughput new method
Technical field:
The present invention relates to oil extraction in oil field technical fields, particularly belong to a kind of carbon dioxide compound throughput new method.
Background technique:
Conventional carbon dioxide, which is handled up, injects a certain amount of carbon dioxide, and mainly increasing oily principle is: the viscosity reduction of carbon dioxide, Volume expansion effect, but due to the heterogeneity on measure stratum, formation pressure fall is big, super floating displacement work of carbon dioxide With the contamination and plugging etc. around, nearly well, conventional carbon dioxide throughput prediction is poor.
Summary of the invention:
The object of the present invention is to provide a kind of carbon dioxide compound throughput new method, the application is to utilize carbon dioxide and chlorine The pH value around nearly well is effectively reduced in the ion exchange of salt, play a dual role of while be acidified de-plugging, while the row of returning immediately.
The technical solution adopted in the present invention: the carbon dioxide compound throughput new method the following steps are included:
1), be initially injected prepad fluid before injecting CO_2 stimulation: prepad fluid is soluble chlorine salting liquid, and villaumite is molten The mass percent concentration 5-30% of liquid, prepad fluid are continuously injected into from oil sets annular space, and injection rate is 100~120m3, mainly Based on self-priming, or using pump note mode, well intake pressure is no more than 10MPa;
2) inject carbon dioxide injection: every meter of effective pay thickiness needs to inject 1-2.5t liquid carbon dioxide;
3) displacement fluid injects: displacement fluid is mixed by hot water and soluble chlorine salting liquid, the quality of villaumite in displacement fluid Percent concentration is 2-7%, and every 1000 meters need that 10m is added3Displacement fluid.
Villaumite is potassium chloride or sal-ammoniac in above scheme.
The utility model has the advantages that the entry well fluid of the application mainly consists of three parts possessed by of the invention: preposition working solution, two Carbonoxide, displacement fluid.Wherein preposition working solution and displacement fluid, are a kind of economically viable fluids, the fluid have it is nontoxic, Stratum, good with carbon dioxide compatibility is not injured, and construction safety is reliable, can inject from oil sets annular space.It is main Principles of increase yield is the ion exchange using carbon dioxide and villaumite, and the pH value around nearly well is effectively reduced, and plays side acidification The double action of de-plugging, the side row of returning immediately.
Specific embodiment:
The carbon dioxide compound throughput new method the following steps are included:
1), be initially injected prepad fluid before injecting CO_2 stimulation: prepad fluid is soluble chlorine salting liquid, and villaumite is molten The mass percent concentration 5-30% of liquid, chlorine ion concentration is related with stratum, output water salinity, and field test shows: chlorine from The mass percent concentration of son is that 5-30% effect is preferable.Villaumite main function: first is that preventing clay particle migration expansion;Second is that Due to the water deposition principle of rock, most of stratum is hydrophily, the crude oil of preposition working solution and the rock surface absorption of addition It is replaced, improves the saturation degree of moveable oil around nearly well;Third is that the villaumite being added belongs to strong acid weak base salt, showed after ionization For faintly acid, the pH value around nearly well can be greatly reduced in conjunction with subsequent carbonic acid, further enhance the acidification de-plugging of solution Effect.Prepad fluid is continuously injected into from oil sets annular space, and injection rate is 100~120m3, mainly based on self-priming, or using pump Note mode, well intake pressure are no more than 10MPa;By field test, villaumite is that potassium chloride or sal-ammoniac effect are best.
2) inject carbon dioxide injection: conventional carbon dioxide is handled up, and injection rate design is main to consider carbon dioxide in crude oil Dissolubility, the effective thickness of practical the water suction situation and reservoir of the application combination oil-well strata, has redesigned carbon dioxide note Enter amount method.Firstly the need of the total amount for verifying the accumulative preposition working solution being added, then consider further that liquid carbon dioxide in this portion Divide the chemical reaction ability in solution, may finally determine the injection rate of carbon dioxide.By field test, every rice bran oil layer is effective Thickness needs to inject 1-2.5t liquid carbon dioxide;Reaction is just able to satisfy to require.
3) displacement fluid injects: displacement fluid is mixed by hot water and soluble chlorine salting liquid, and conventional carbon dioxide, which is handled up, to be applied There is a certain amount of carbon dioxide after work, in pit shaft not to be injected into stratum, can not effectively utilize carbon dioxide in this way Resource.And in the application work progress, after having infused liquid carbon dioxide, reinject a certain amount of displacement fluid, chlorine in displacement fluid The mass percent concentration of salt is 2-7%, and adding amount can determine that every 1000 meters need that 10m is added according to well depth3Displacement fluid. It is constructed by displacement fluid, it can be ensured that the carbon dioxide in pit shaft reacts with stratum and crude oil, that is, improves the benefit of resource With rate, and reduce the influence to external environment.By field test, villaumite is that potassium chloride or sal-ammoniac effect are best.
The new method of the application is applied to Ba1-5 well, Ba1-5 well self-priming 120m3Preposition working solution injects liquid according to scheme State carbon dioxide 15t, the well head injection pressure that is averaged are maintained at 7.5MPa or so, displacement fluid 20m3, stewing well opening well and making production after 12 days, Averagely increase day by day 2.8 tons of oil, adds up to increase 375 tons of oil, the carbon dioxide compound throughput oil increasing effect is obvious.

Claims (2)

1. a kind of carbon dioxide compound throughput new method, comprising the following steps:
1), be initially injected prepad fluid before injecting CO_2 stimulation: prepad fluid is soluble chlorine salting liquid, chloride solution Mass percent concentration 5-30%, prepad fluid are continuously injected into from oil sets annular space, and injection rate is 100~120m3, mainly with certainly Based on suction, or using pump note mode, well intake pressure is no more than 10MPa;
2) inject carbon dioxide injection: every meter of effective pay thickiness needs to inject 1-2.5t liquid carbon dioxide;
3) displacement fluid injects: displacement fluid is mixed by hot water and soluble chlorine salting liquid, the quality percentage of villaumite in displacement fluid Specific concentration is 2-7%, and every 1000 meters need that 10m is added3Displacement fluid.
2. carbon dioxide compound throughput new method according to claim 1, it is characterised in that: villaumite is potassium chloride or chlorination Ammonia.
CN201811053768.XA 2018-09-11 2018-09-11 A kind of carbon dioxide compound throughput new method Pending CN109138944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811053768.XA CN109138944A (en) 2018-09-11 2018-09-11 A kind of carbon dioxide compound throughput new method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811053768.XA CN109138944A (en) 2018-09-11 2018-09-11 A kind of carbon dioxide compound throughput new method

Publications (1)

Publication Number Publication Date
CN109138944A true CN109138944A (en) 2019-01-04

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CN201811053768.XA Pending CN109138944A (en) 2018-09-11 2018-09-11 A kind of carbon dioxide compound throughput new method

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CN (1) CN109138944A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022006A (en) * 2019-12-06 2020-04-17 大庆金军石油科技开发有限公司 Method for improving shale oil well recovery ratio through carbon dioxide composite huff and puff
CN114687714A (en) * 2022-04-12 2022-07-01 中国矿业大学 Nano-particle composite low-salinity water-enhanced CO2Method of injection capability

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103821486A (en) * 2014-03-11 2014-05-28 中国石油化工股份有限公司 Novel chemical huff and puff method for increase in production
CN104453812A (en) * 2014-11-07 2015-03-25 赵金树 Method for acid stimulation after carbon dioxide huffing-puffing
CN104481475A (en) * 2014-10-10 2015-04-01 赵金树 Oil well carbon dioxide carbonated water throughput production increasing method
US20170137697A1 (en) * 2013-10-09 2017-05-18 Geoffrey Thyne Optimized salinity for enhanced water flood applications
CN106968652A (en) * 2017-03-27 2017-07-21 姚莉芳 A kind of auxiliary carbon dioxide is handled up new method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170137697A1 (en) * 2013-10-09 2017-05-18 Geoffrey Thyne Optimized salinity for enhanced water flood applications
CN103821486A (en) * 2014-03-11 2014-05-28 中国石油化工股份有限公司 Novel chemical huff and puff method for increase in production
CN104481475A (en) * 2014-10-10 2015-04-01 赵金树 Oil well carbon dioxide carbonated water throughput production increasing method
CN104453812A (en) * 2014-11-07 2015-03-25 赵金树 Method for acid stimulation after carbon dioxide huffing-puffing
CN106968652A (en) * 2017-03-27 2017-07-21 姚莉芳 A kind of auxiliary carbon dioxide is handled up new method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022006A (en) * 2019-12-06 2020-04-17 大庆金军石油科技开发有限公司 Method for improving shale oil well recovery ratio through carbon dioxide composite huff and puff
CN114687714A (en) * 2022-04-12 2022-07-01 中国矿业大学 Nano-particle composite low-salinity water-enhanced CO2Method of injection capability

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Application publication date: 20190104