CN113389531A - CO2Injection-production method, electronic device, and medium - Google Patents
CO2Injection-production method, electronic device, and medium Download PDFInfo
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- CN113389531A CN113389531A CN202010171623.0A CN202010171623A CN113389531A CN 113389531 A CN113389531 A CN 113389531A CN 202010171623 A CN202010171623 A CN 202010171623A CN 113389531 A CN113389531 A CN 113389531A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 125
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000004590 computer program Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 229910002091 carbon monoxide Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 230000005465 channeling Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 7
- 239000003129 oil well Substances 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009919 sequestration Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/18—Repressuring or vacuum methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Abstract
Discloses a CO2Injection-production method, electronic device, and medium. The method can comprise the following steps: determining original formation pressure, and setting a gas-oil ratio threshold value and a production stop threshold value; continuous CO injection into injection well2Producing by the production well; monitoring the gas-oil ratio of the formation pressure and the wellhead of the production well in real time; when the gas-oil ratio reaches a gas-oil ratio threshold value, the production well stops producing; and (4) when the pressure of the local stratum is recovered to the original pressure of the stratum, the production well recovers production until the gas-oil ratio reaches a production stop threshold, and the production well and the injection well stop working. The invention continuously injects CO through the injection well2The control mode of intermittent production of the production well is adopted, and CO is added2Swept volume, prevention of gas channeling, alleviation of formation pressure drop, and increase of oil well productivity, thereby increasing CO2Driving production effect and realizing CO2The method has good application prospect in the development of driving benefits.
Description
Technical Field
The invention relates to the field of oil reservoir recovery, in particular to CO2Injection-production method, electronic device, and medium.
Background
Carbon dioxide flooding is a mature oil extraction technology, can realize carbon sequestration while flooding oil and utilizing, and has both economic and environmental benefits. CO 22The oil displacement technology has a development history of more than 60 years, and according to incomplete statistics, nearly 80 carbon dioxide oil displacement projects are implemented all over the world at present. CO 22The use of flooding is also accompanied by a number of problems. Among them, CO is the one having a large influence on the recovery ratio2And (4) expelling gas channeling. Whether the gas channeling can be inhibited and blocked is a key factor for successful gas injection development, because once the gas channeling occurs, the gas channeling wastes manpower, material resources and financial resources and causes the loss of non-wear-out of an oil well. Therefore, CO is used in familiarity2On the basis of reservoir geological characteristics, development on CO2The research on the influence factors of the gas channeling and the control method is very important, so that a gas injection exploitation scheme can be designed in a targeted manner, and the maximum economic benefit is obtained.
At present, the main methods for treating gas channeling include injection mode adjustment and measure adjustment. Wherein the common injection mode adjustment comprises water-gas alternative injection, plugging agent and CO2Mixing and injecting; the measure adjustment comprises methods of gas injection strength adjustment, gas injection quantity adjustment, layered gas injection, periodic gas injection, intermittent gas injection and the like. Although these methods can achieve certain effects, they also have many problems in field implementation, such as water-gas alternation, water injection occupying a part of the pore volume of the reservoir, gas storage space reduction and CO reduction2Potential for sequestration; meanwhile, the physical property of a low-permeability reservoir is poor, the water injection capability is limited, the gas phase permeability is reduced due to the water injection, and the gas injection capability is weakened. Gels and the likeThe limited capability of the type plugging agent in adjusting the gas suction section is easy to block the stratum sometimes, so that the gas suction capability of the stratum is reduced rapidly, and the effective period of the plugging agent is long. Current CO2The problems are difficult to solve fundamentally in a control mode of flooding, injection and production, and the effect is not obvious in frequent treatment.
Therefore, there is a need to develop a CO2Injection-production method, electronic device, and medium.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides a CO2Injection and production method, electronic device and medium capable of continuously injecting CO through injection well2The control mode of intermittent production of the production well is adopted, and CO is added2Swept volume, prevention of gas channeling, alleviation of formation pressure drop, and increase of oil well productivity, thereby increasing CO2Driving production effect and realizing CO2The method has good application prospect in the development of driving benefits.
In a first aspect, the disclosed embodiments provide a CO2The injection-production method comprises the following steps: setting a pressure threshold, a gas-oil ratio threshold and a production stop threshold; continuous CO injection into injection well2Producing by the production well; the gas-oil ratio reaches the gas-oil ratio threshold value, and the production well stops producing; and when the formation pressure is recovered to the pressure threshold value, the production well recovers production until the gas-oil ratio reaches the production stopping threshold value, and the production well and the injection well stop working.
Preferably, the gas-oil ratio threshold is lower than the production stop threshold.
Preferably, the number of the gas-oil ratio threshold values is 1-5.
Preferably, if the number of the gas-oil ratio thresholds is greater than 1, the plurality of gas-oil ratio thresholds are arranged in order from small to large.
Preferably, according to the number relation between the gas-oil ratio and the gas-oil ratio threshold value, the production stopping and production resuming of the production well are repeated for a plurality of times until the gas-oil ratio reaches the production stopping threshold value, wherein the gas-oil ratio threshold values are sequentially selected according to the order from small to large.
Preferably, the pressure threshold is the virgin formation pressure.
Preferably, the method further comprises the following steps: the formation pressure is monitored in real time.
Preferably, the method further comprises the following steps: and monitoring the gas-oil ratio of the wellhead of the production well in real time.
As a specific implementation of the embodiments of the present disclosure,
in a second aspect, an embodiment of the present disclosure further provides an electronic device, including:
a memory storing executable instructions;
a processor executing the executable instructions in the memory to implement the CO2And (4) injection and production methods.
In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the CO2And (4) injection and production methods.
The beneficial effects are that: continuous CO injection through injection well2Compared with the control mode of intermittent production of the production well, the injection and production method for controlling the well opening and closing of the production well through the gas-oil ratio and the oil reservoir pressure effectively expands CO2Swept volume, avoiding conventional CO2Drives off gas channeling and delays CO2Gas channeling speed, maintenance of formation pressure, increase of production well productivity, reduction of produced gas amount, improvement of CO2And (4) a hair-dispelling effect.
The method and apparatus of the present invention have other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.
FIG. 1 shows a CO according to the invention2Flow chart of the steps of the injection-production method.
FIG. 2 shows a CO according to an embodiment of the invention2Flow chart of the steps of the injection-production method.
FIG. 3 shows a schematic of gas-oil ratio and formation pressure variation according to an embodiment of the invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
FIG. 1 shows a CO according to the invention2Flow chart of the steps of the injection-production method.
In this example, CO according to the invention2The injection-production method may include: step 101, setting a pressure threshold, a gas-oil ratio threshold and a production stop threshold; step 102, continuously injecting CO into the injection well2Producing by the production well; 103, stopping production of the production well when the gas-oil ratio reaches a gas-oil ratio threshold value; and 104, recovering the pressure of the formation to a pressure threshold, and recovering the production of the production well until the gas-oil ratio reaches a production stopping threshold, and stopping the work of the production well and the injection well.
In one example, the gas-to-oil ratio threshold is below a shutdown threshold.
In one example, the number of gas to oil ratio thresholds is 1-5.
In one example, if the number of the gas-oil ratio thresholds is greater than 1, the plurality of gas-oil ratio thresholds are arranged in order from small to large.
In one example, the production stopping and production resuming of the production well are repeated for a plurality of times according to the quantity relation between the gas-oil ratio and the gas-oil ratio threshold value until the gas-oil ratio reaches the production stopping threshold value, wherein the gas-oil ratio threshold values are sequentially selected from the small to the large.
In one example, the pressure threshold is the virgin formation pressure.
In one example, further comprising: the formation pressure is monitored in real time.
In one example, further comprising: and monitoring the gas-oil ratio of the wellhead of the production well in real time.
In particular, CO according to the invention2The injection-production method may include:
setting a pressure threshold, a gas-oil ratio threshold and a production stop threshold, wherein the pressure threshold can be the original formation pressure, the gas-oil ratio threshold is lower than the production stop threshold, and the number of the gas-oil ratio thresholds can be 1-5; continuous CO injection into injection well2The production well produces the oil and gas, and the gas-oil ratio of the formation pressure and the wellhead of the production well is monitored in real time; when the gas-oil ratio reaches a gas-oil ratio threshold value, the production well stops producing; and (4) when the pressure of the local stratum is recovered to the original pressure of the stratum, the production well recovers production until the gas-oil ratio reaches a production stop threshold, and the production well and the injection well stop working.
And if the number of the gas-oil ratio thresholds is larger than 1, arranging a plurality of gas-oil ratio thresholds in a sequence from small to large, repeating the production stopping and production resuming of the production well for a plurality of times according to the number relation between the gas-oil ratio and the gas-oil ratio thresholds until the gas-oil ratio reaches the production stopping threshold, wherein the gas-oil ratio thresholds are sequentially selected in the sequence from small to large.
The minimum first gas-oil ratio threshold value is used as a threshold value for the first time, and when the gas-oil ratio reaches the first gas-oil ratio threshold value, the production well stops producing; when the pressure of the formation is recovered to the original formation pressure, the production wells recover to produce, the production wells are arranged in the order from small to large at the moment, the second gas-oil ratio threshold is used as a threshold, and when the gas-oil ratio reaches the second gas-oil ratio threshold, the production wells stop producing; and (4) when the pressure of the stratum recovers to the original formation pressure, the production well recovers production, and the like until the gas-oil ratio reaches the production stop threshold, and the production well and the injection well stop working.
The method continuously injects CO through an injection well2The control mode of intermittent production of the production well is adopted, and CO is added2Swept volume, prevention of gas channeling, alleviation of formation pressure drop, and increase of oil well productivity, thereby increasing CO2Driving production effect and realizing CO2The method has good application prospect in the development of driving benefits.
Application example
To facilitate understanding of the solution of the embodiments of the present invention and the effects thereof, a specific application example is given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.
FIG. 2 shows a CO according to an embodiment of the invention2Flow chart of the steps of the injection-production method.
3 gas-oil ratio thresholds are set to be 500m respectively3/m3、1000m3/m3、1500m3/m3The production stop threshold is 2000m3/m3. Then CO2A flow chart of the steps of the voidage replacement method is shown in fig. 2.
Determining the pressure threshold as the original formation pressure, and continuously injecting CO into the injection well2Producing by the production well; and monitoring the gas-oil ratio of the formation pressure and the wellhead of the production well in real time.
When the gas-oil ratio reaches 500m3/m3Production is stopped by the producing well, and the injection well continues to inject CO2The formation pressure returns to the original formation pressure and the production well resumes production.
When the gas-oil ratio reaches 1000m3/m3Production is stopped by the producing well, and the injection well continues to inject CO2The formation pressure returns to the original formation pressure and the production well resumes production.
When the gas-oil ratio reaches 1500m3/m3Production is stopped by the producing well, and the injection well continues to inject CO2When the formation pressure returns to the original formation pressure, the production well returnsAnd (4) production.
When the gas-oil ratio reaches 2000m3/m3And the production well and the injection well stop working.
FIG. 3 shows a schematic of gas-to-oil ratio and formation pressure variations for an overall production process as shown in FIG. 3, according to an embodiment of the present invention.
In conclusion, the invention continuously injects CO through the injection well2The control mode of intermittent production of the production well is adopted, and CO is added2Swept volume, prevention of gas channeling, alleviation of formation pressure drop, and increase of oil well productivity, thereby increasing CO2Driving production effect and realizing CO2The method has good application prospect in the development of driving benefits.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention is intended only to illustrate the benefits of embodiments of the invention and is not intended to limit embodiments of the invention to any examples given.
An electronic device according to an embodiment of the present disclosure includes a memory and a processor.
The memory is to store non-transitory computer readable instructions. In particular, the memory may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc.
The processor may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device to perform desired functions. In one embodiment of the disclosure, the processor is configured to execute the computer readable instructions stored in the memory.
Those skilled in the art should understand that, in order to solve the technical problem of how to obtain a good user experience, the present embodiment may also include well-known structures such as a communication bus, an interface, and the like, and these well-known structures should also be included in the protection scope of the present disclosure.
For the detailed description of the present embodiment, reference may be made to the corresponding descriptions in the foregoing embodiments, which are not repeated herein.
An embodiment of the disclosure provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the CO2And (4) injection and production methods.
A computer-readable storage medium according to an embodiment of the present disclosure has non-transitory computer-readable instructions stored thereon. The non-transitory computer readable instructions, when executed by a processor, perform all or a portion of the steps of the methods of the embodiments of the disclosure previously described.
The computer-readable storage media include, but are not limited to: optical storage media (e.g., CD-ROMs and DVDs), magneto-optical storage media (e.g., MOs), magnetic storage media (e.g., magnetic tapes or removable disks), media with built-in rewritable non-volatile memory (e.g., memory cards), and media with built-in ROMs (e.g., ROM cartridges).
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. CO (carbon monoxide)2The injection-production method is characterized by comprising the following steps:
setting a pressure threshold, a gas-oil ratio threshold and a production stop threshold;
continuous CO injection into injection well2Producing by the production well;
the gas-oil ratio reaches the gas-oil ratio threshold value, and the production well stops producing;
and when the formation pressure is recovered to the pressure threshold value, the production well recovers production until the gas-oil ratio reaches the production stopping threshold value, and the production well and the injection well stop working.
2. CO according to claim 12The injection-production method, wherein the gas-oil ratio threshold is lower than the shut-down threshold.
3. CO according to claim 12The injection-production method comprises the step of controlling the number of the gas-oil ratio threshold values to be 1-5.
4. CO according to claim 32The injection-production method comprises the step of arranging the plurality of gas-oil ratio thresholds in the order from small to large if the number of the gas-oil ratio thresholds is larger than 1.
5. CO according to claim 42And the injection and production method comprises the step of repeating production stopping and production resuming of the production well for multiple times according to the quantity relation between the gas-oil ratio and the gas-oil ratio threshold value until the gas-oil ratio reaches the production stopping threshold value, wherein the gas-oil ratio threshold values are sequentially selected from small to large.
6. CO according to claim 12The injection-production method, wherein the pressure threshold is the original formation pressure.
7. CO according to claim 12The injection-production method further comprises the following steps: the formation pressure is monitored in real time.
8. CO according to claim 12The injection-production method further comprises the following steps: and monitoring the gas-oil ratio of the wellhead of the production well in real time.
9. An electronic device, characterized in that the electronic device comprises:
a memory storing executable instructions;
a processor running the memoryTo implement the CO of any one of claims 1-82And (4) injection and production methods.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the CO of any of claims 1-82And (4) injection and production methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010171623.0A CN113389531A (en) | 2020-03-12 | 2020-03-12 | CO2Injection-production method, electronic device, and medium |
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| CN202010171623.0A CN113389531A (en) | 2020-03-12 | 2020-03-12 | CO2Injection-production method, electronic device, and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898354A (en) * | 2022-12-23 | 2023-04-04 | 新疆敦华绿碳技术股份有限公司 | Tracking evaluation method for pre-fracturing construction process |
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