CN109138944A - A kind of carbon dioxide compound throughput new method - Google Patents
A kind of carbon dioxide compound throughput new method Download PDFInfo
- 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
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- fluid
- displacement fluid
- villaumite
- new method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Natural products O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 38
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 12
- -1 carbon dioxide compound Chemical class 0.000 title claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 17
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000460 chlorine Substances 0.000 claims abstract description 11
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000009938 salting Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims abstract description 5
- 230000000638 stimulation Effects 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical group [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 8
- 235000011164 potassium chloride Nutrition 0.000 claims description 4
- 239000001103 potassium chloride Substances 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 238000005342 ion exchange Methods 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 229960004424 carbon dioxide Drugs 0.000 description 30
- 239000003921 oil Substances 0.000 description 9
- 235000019198 oils Nutrition 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000012224 working solution Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 235000019774 Rice Bran oil Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000008165 rice bran oil Substances 0.000 description 1
- 230000010148 water-pollination Effects 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
- 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
- E21B43/164—Injecting CO2 or carbonated water
-
- 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
Landscapes
- 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
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.
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 |
Family
ID=64824430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811053768.XA Pending CN109138944A (en) | 2018-09-11 | 2018-09-11 | A kind of carbon dioxide compound throughput new method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109138944A (en) |
Cited By (2)
| 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)
| 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 |
-
2018
- 2018-09-11 CN CN201811053768.XA patent/CN109138944A/en active Pending
Patent Citations (5)
| 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)
| 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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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190104 |