CN108397171A - A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation - Google Patents
A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation Download PDFInfo
- Publication number
- CN108397171A CN108397171A CN201810104415.1A CN201810104415A CN108397171A CN 108397171 A CN108397171 A CN 108397171A CN 201810104415 A CN201810104415 A CN 201810104415A CN 108397171 A CN108397171 A CN 108397171A
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- Prior art keywords
- carbon dioxide
- well
- nitrogen
- handled
- exploitation
- 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.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 74
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 37
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 37
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000010779 crude oil Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 230000000638 stimulation Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 abstract 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013589 supplement 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
- 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention relates to compact oil reservoir production practice technical fields, specifically a kind of nitrogen auxiliary carbon dioxide, which is handled up, exploits fine and close oily method, after the exploitation of first round CO_2 stimulation, nitrogen and carbon dioxide are successively injected compact oil reservoir by second round according to a certain percentage, and stewing well is carried out after the completion of injection.When stewing well, nitrogen is spread with carbon dioxide to deep formation.Since solubility of the nitrogen in crude oil is smaller, nitrogen can effectively maintain strata pressure, to increase stratum elastic energy.The synergistic effect of nitrogen and carbon dioxide so that after once handling up that oil well can keep higher oil production.It carries out more rounds to handle up, can effectively maintain strata pressure, improve compact oil reservoir recovery ratio.
Description
Technical field
The present invention relates to compact oil reservoir production practice technical field, specifically a kind of nitrogen auxiliary carbon dioxide is handled up exploitation
The method of fine and close oil.
Background technology
Currently, China's major part oilfield exploitation has been enter into the middle and later periods, it is contemplated that arriving the year two thousand twenty China's oil external dependence degree will
It can exceed that 60%, the in short supply of petroleum resources has become the main bottleneck for restricting the sustainable fast development of China's economic society.It causes
Close oil is used as a kind of unconventional petroleum resources, and reserves are big, and part oil field has obtained effective exploitation at home.Therefore fine and close oil
It is known as " dark fund " of petroleum industrial circle, becomes important oil making ＆ breaking.The effective exploitation of fine and close oil already becomes China
The important leverage of energy security.However, there are hypotonicity, the unconventional features such as low-porosity for compact oil reservoir so that fine and close oil
Hiding exploitation, there are larger difficulty.The development scheme of compact oil reservoir is mainly horizontal well multistage fracturing technique, volume fracturing skill at present
Art and carbon dioxide injection development technique.
Carbon dioxide injection development technique is implemented generally after fracturing technique.Since displacement pressure difference is larger, carbon dioxide injection
Exploitation is generally using process means of handling up.Document shows that main function mechanism of the carbon dioxide in compact oil reservoir is supplement stratum
Energy, crude oil expansion and component extracting.A large amount of desk research shows that CO_2 stimulation can obtain well in the period 1
Development effectiveness, begin from second round, crude oil recovery percent of reserves successively decreases rapidly, and stratum energy is in debt, it is difficult to establish effective pressure
System, development effectiveness are deteriorated.How a problem that the compact oil reservoir recovery ratio of more round CO_2 stimulations be current is improved.
Invention content
The purpose of the present invention is to solve above-mentioned the deficiencies in the prior art, a kind of nitrogen auxiliary carbon dioxide is provided and is handled up
The method of the fine and close oil of exploitation, well oil output is improved by improving stratum energy.
The technical problems to be solved by the invention are realized using following technical scheme：A kind of nitrogen auxiliary carbon dioxide gulps down
The method for spitting the fine and close oil of exploitation, includes the following steps：
A, compact reservoir is injected carbon dioxide into from injection well, the volume of injection is 0.1~0.2PV；
B, well is boiled in a covered pot over a slow fire；
C, opening well and making production after stewing well, during stratum filtration, carbon dioxide displacement crude oil is from formation flow to well
Cylinder, final extraction to ground；
D, compact reservoir is injected from injection well by nitrogen, injected slurry volume is 0.2~0.5PV；
E, compact reservoir, 0.1~0.15PV are injected carbon dioxide into；
F, well is boiled in a covered pot over a slow fire；
G, opening well and making production after stewing well, during stratum filtration, carbon dioxide is with nitrogen flooding for crude oil flow to well
Cylinder, is finally adopted to ground；
H, after waiting for that the nitrogen auxiliary carbon dioxide of a round is handled up, step D~step G is repeated, carries out 2~5 wheels
It is secondary to handle up.
Technical scheme of the present invention also has：The time that well is boiled in a covered pot over a slow fire in the step B is 28~51 days.
Technical scheme of the present invention also has：The time that well is boiled in a covered pot over a slow fire in the step F is 40~65 days.
Compared with the existing technology, nitrogen auxiliary carbon dioxide of the present invention, which is handled up, exploits the advantageous effect of fine and close oily method
For：The advantage of nitrogen soak and CO_2 stimulation is combined, crude oil expansion can not only be kept to be acted on component extracting, moreover it is possible to
Stratum elastic energy is improved, to improve oil well output.
Description of the drawings
Fig. 1 handles up for nitrogen auxiliary carbon dioxide of the present invention exploits the method schematic diagram of fine and close oil.
In figure：1, high-pressure carbon dioxide storage tank, 2, ground injection device, 3, injection well, 4, high pressure nitrogen storage tank, 5, horizontal
Well, 6, fracturing fracture, 7, fine and close oily reservoir.
Specific implementation mode
In order to clarify the technical characteristics of the invention, making to the specific embodiment of the invention below according to attached drawing further
Explanation.
As shown in Figure 1, high-pressure carbon dioxide storage tank 1 is connected by exit pipeline with ground injection device 2, pass through pipeline
Connect ground injection device 2 and with injection well 3, high pressure nitrogen storage tank 4 connect by pipeline with ground injection device 2, then with note
Enter well 3 to be connected.
A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation, includes the following steps：
A, compact reservoir is injected carbon dioxide into from injection well, the volume of injection is 0.1~0.2PV；
B, well is boiled in a covered pot over a slow fire 28~51 days；
C, opening well and making production after stewing well, during stratum filtration, carbon dioxide displacement crude oil is from formation flow to well
Cylinder, final extraction to ground；
D, compact reservoir, injected slurry volume 0.25PV are injected from injection well by nitrogen；
E, compact reservoir, 0.1~0.15PV are injected carbon dioxide into；
F, well is boiled in a covered pot over a slow fire 45 days, during stewing well, carbon dioxide occurs extraction with crude oil, expansion, dissolves the effects that viscosity reduction, and nitrogen
Solubility of the gas in crude oil is relatively low, preserves gas phase state in the earth formation, plays the role of maintaining strata pressure；
G, opening well and making production after stewing well, during stratum filtration, carbon dioxide is with nitrogen flooding for crude oil flow to well
Cylinder, is finally adopted to ground；
H, after waiting for that the nitrogen auxiliary carbon dioxide of a round is handled up, step D~step G is repeated, carries out 2~5 wheels
It is secondary to handle up.
The embodiment of the present invention is elaborated above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also do without departing from the purpose of the present invention
Go out various change.
Claims (3)
1. a kind of nitrogen auxiliary carbon dioxide is handled up, the method for the fine and close oil of exploitation, includes the following steps：
A, compact reservoir is injected carbon dioxide into from injection well, the volume of injection is 0.1~0.2PV；
B, well is boiled in a covered pot over a slow fire；
C, opening well and making production after stewing well, during stratum filtration, carbon dioxide displacement crude oil is from formation flow to pit shaft, most
It is produced eventually to ground；
D, compact reservoir is injected from injection well by nitrogen, injected slurry volume is 0.2~0.5PV；
E, compact reservoir, 0.1~0.15PV are injected carbon dioxide into；
F, well is boiled in a covered pot over a slow fire；
G, opening well and making production after stewing well, during stratum filtration, carbon dioxide replaces crude oil flow to pit shaft with nitrogen flooding, most
It is adopted eventually to ground；
H, after waiting for that the nitrogen auxiliary carbon dioxide of a round is handled up, step D~step G is repeated, 2~5 rounds is carried out and gulps down
It spits.
The method of the fine and close oil of exploitation 2. nitrogen auxiliary carbon dioxide according to claim 1 is handled up, it is characterised in that：It is described
The time that well is boiled in a covered pot over a slow fire in step B is 28~51 days.
The method of the fine and close oil of exploitation 3. nitrogen auxiliary carbon dioxide according to claim 1 is handled up, it is characterised in that：It is described
The time that well is boiled in a covered pot over a slow fire in step F is 40~65 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104415.1A CN108397171A (en) | 2018-02-02 | 2018-02-02 | A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810104415.1A CN108397171A (en) | 2018-02-02 | 2018-02-02 | A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108397171A true CN108397171A (en) | 2018-08-14 |
Family
ID=63096134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810104415.1A Pending CN108397171A (en) | 2018-02-02 | 2018-02-02 | A kind of nitrogen auxiliary carbon dioxide is handled up the method for the fine and close oil of exploitation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847867A (en) * | 2019-12-12 | 2020-02-28 | 西南石油大学 | Gas injection displacement injection point selection method for tight oil reservoir |
| CN113323636A (en) * | 2021-05-19 | 2021-08-31 | 中国石油化工股份有限公司 | Nitrogen injection amount determining method and oil extraction method for composite water control and oil increase |
| CN114909113A (en) * | 2022-06-08 | 2022-08-16 | 中国石油大学(华东) | Movable water-gas alternative gas injection device for shale oil exploitation |
| CN115478818A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | CO (carbon monoxide) 2 And N 2 Method for improving recovery ratio by composite huff and puff |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451844A (en) * | 2003-05-09 | 2003-10-29 | 辽河石油勘探局 | Heat, electricity, CO2 and N2 united supply making method for oil field production |
| US20140090844A1 (en) * | 2012-09-28 | 2014-04-03 | Fatma Daou | Swellable elastomer and its use in acidizing or matrix stimulation |
| CN105587301A (en) * | 2014-10-23 | 2016-05-18 | 中国石油化工股份有限公司 | Method capable of improving recovery efficiency through heavy oil thermal recovery |
| CN106640006A (en) * | 2016-12-29 | 2017-05-10 | 中国石油天然气股份有限公司 | Oil extraction method by injecting air and carbon dioxide to assist steam huff and puff |
| CN106968651A (en) * | 2017-05-02 | 2017-07-21 | 中国石油化工股份有限公司 | A kind of nitrogen and carbon dioxide composite swallowing-spitting oil extraction |
-
2018
- 2018-02-02 CN CN201810104415.1A patent/CN108397171A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451844A (en) * | 2003-05-09 | 2003-10-29 | 辽河石油勘探局 | Heat, electricity, CO2 and N2 united supply making method for oil field production |
| US20140090844A1 (en) * | 2012-09-28 | 2014-04-03 | Fatma Daou | Swellable elastomer and its use in acidizing or matrix stimulation |
| CN105587301A (en) * | 2014-10-23 | 2016-05-18 | 中国石油化工股份有限公司 | Method capable of improving recovery efficiency through heavy oil thermal recovery |
| CN106640006A (en) * | 2016-12-29 | 2017-05-10 | 中国石油天然气股份有限公司 | Oil extraction method by injecting air and carbon dioxide to assist steam huff and puff |
| CN106968651A (en) * | 2017-05-02 | 2017-07-21 | 中国石油化工股份有限公司 | A kind of nitrogen and carbon dioxide composite swallowing-spitting oil extraction |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847867A (en) * | 2019-12-12 | 2020-02-28 | 西南石油大学 | Gas injection displacement injection point selection method for tight oil reservoir |
| CN110847867B (en) * | 2019-12-12 | 2020-08-25 | 西南石油大学 | Gas injection displacement injection point selection method for tight oil reservoir |
| CN113323636A (en) * | 2021-05-19 | 2021-08-31 | 中国石油化工股份有限公司 | Nitrogen injection amount determining method and oil extraction method for composite water control and oil increase |
| CN115478818A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | CO (carbon monoxide) 2 And N 2 Method for improving recovery ratio by composite huff and puff |
| CN114909113A (en) * | 2022-06-08 | 2022-08-16 | 中国石油大学(华东) | Movable water-gas alternative gas injection device for shale oil exploitation |
| CN114909113B (en) * | 2022-06-08 | 2023-11-24 | 长江大学 | Movable water-gas alternate gas injection device for shale oil exploitation |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180814 |
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