CN110318717A - Inflating method in oil recovery process - Google Patents
Inflating method in oil recovery process Download PDFInfo
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- CN110318717A CN110318717A CN201810279521.3A CN201810279521A CN110318717A CN 110318717 A CN110318717 A CN 110318717A CN 201810279521 A CN201810279521 A CN 201810279521A CN 110318717 A CN110318717 A CN 110318717A
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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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
Abstract
The inflating method in a kind of oil recovery process is disclosed, may include: that multiple well groups are divided according to total well number, respectively well group 1 to well group n, each well group include well 1 and well 2；For each well group: step 1: well 1 and well 2 to well group m carry out natural energy During Natural Depletion；Step 2: well 1 carries out gas implant operation, and well 2 carries out oil-recovery operations；Step 3: well 1 carries out stewing well operation, and well 2 carries out oil-recovery operations；Step 4: well 1 carries out oil-recovery operations, and well 2 carries out gas implant operation；Step 5: well 1 carries out oil-recovery operations, and well 2 carries out stewing well operation；Step 6: step 1- step 5 being repeated to well group m, until the gas-oil ratio of well group m is lower than threshold value.Present invention combination gas is handled up and the advantages of displacement, with less gas injection rate, obtains the development effectiveness of preferable gas injection.
Description
Technical field
The present invention relates to oil-gas field development fields, more particularly, to the inflating method in a kind of oil recovery process.
Background technique
Gas injection oil reservoir improves recovery ratio and has become one of main raising recovery ratio method.Gas injection mode packet
It includes and handles up and displacement two ways.Gas, which is handled up, refers to the technology of individual well injection gas, stewing well and oil recovery, main advantage
It is that gas usage is few, easy to operate, while range is small, ultimate recovery is low, yield is successively decreased with periodicity increase there is also involving
The disadvantages of fast.Gas displacement refers to the technology injecting gas from injection well, recovering the oil from producing well, and ultimate recovery, which is higher than, to be gulped down
It spits, but that there is also gas usages is big, is easy the features such as has channeling.
In order to improve the effect that gas is handled up, many scholars are targetedly studied, such as optimization injection rate, injection
Pressure, injection rate, stewing well time and rate of oil production etc..In order to improve the effect of gas displacement, many scholars have also carried out needle
Research to property, such as optimization injection rate, injection pressure, injection rate and injection mode etc..Especially for injection mode, mention
The injection modes such as continuous gas injection, period gas injection, water-air two-phase flow are gone out, it is optimal gas note that research, which demonstrates water alternating gas injection,
Enter mode.Many scholars also studied the adaptability that gas drives well pattern simultaneously, compared five-spot pattern, anti-seven spot pattern, anti-nine
The development effectiveness such as point well pattern, it is indicated that five-spot pattern is most beneficial for gas displacement.But from the point of view of the implementation result at scene, gas is driven
It is exactly has channeling for maximum problem, injects gas along has channeling channel and enter producing well from injection well, it is difficult to play well pattern control
The big advantage of area processed.In short, gas injection oil reservoir raising recovery ratio still remains, oil-gas ratio is low, recovery ratio is low, is easy has channeling
The problems such as, therefore, it is necessary to develop the inflating method in a kind of oil recovery process.
The information for being disclosed in background of invention part is merely intended to deepen the reason to general background technique of the invention
Solution, and it is known to those skilled in the art existing to be not construed as recognizing or imply that the information is constituted in any form
Technology.
Summary of the invention
The invention proposes the inflating method in a kind of oil recovery process, can handle up in conjunction with gas and the advantages of displacement,
With less gas injection rate, the development effectiveness of preferable gas injection is obtained.
The method may include: multiple well groups are divided according to total well number, respectively well group 1, well group 2 ..., well group n,
Each well group includes two mouthfuls of wells, respectively well 1 and well 2；For each well group, following steps are carried out: step 1: to well group m's
Well 1 and well 2 carry out natural energy During Natural Depletion；Step 2: well 1 carries out gas implant operation, and well 2 carries out oil-recovery operations；Step 3:
Well 1 carries out stewing well operation, and well 2 carries out oil-recovery operations；Step 4: well 1 carries out oil-recovery operations, and well 2 carries out gas implant operation；Step
Rapid 5: well 1 carries out oil-recovery operations, and well 2 carries out stewing well operation；Step 6: step 1- step 5 is repeated to well group m, until well group m
Gas-oil ratio is lower than threshold value；Step 7: step 1- step 6 being repeated to well group m+1, until well group n completes step 1- step 6；Wherein, N
For well group quantity, 1≤m≤n-1.
Preferably, the gas includes: CO2, nitrogen, flue gas, natural gas, lighter hydrocarbons.
Preferably, step 1 further include: by horizontal section length, well spacing, pressure break series, fracture half-length, matrix porosity,
Matrix permeability obtains gas injection parameter, stewing well parameter and petroleum production parameter.
Preferably, step 1 further include: establish model for well group m, optimized by numerical simulation, obtain gas injection ginseng
Number, stewing well parameter and petroleum production parameter.
Preferably, the gas injection parameter includes gas injection time.
Preferably, the gas injection time is 40-80 days.
Preferably, the stewing well parameter includes the stewing well time.
Preferably, the stewing well time is 20-40 days.
Preferably, the petroleum production parameter includes the time of recovering the oil.
Preferably, the oil recovery time is 60-120 days.
The beneficial effects of the present invention are: each cycle memory can realize effectively drive in gas injection, oil recovery process between well
It replaces；There are stewing well processes, give full play to the diffusion to matrix, extraction mechanism in the process of the stewing well of gas；There are the reversed of two mouthfuls of wells
Displacement can effectively inhibit has channeling.Method of the invention can handle up in conjunction with gas and the advantages of displacement, be infused with less gas
Enter amount, obtains the development effectiveness of preferable gas injection.
The present invention has other characteristics and advantages, these characteristics and advantages are from the attached drawing and subsequent tool being incorporated herein
It will be apparent, or will be carried out in body embodiment in the drawings and the subsequent detailed description incorporated herein
Statement in detail, the drawings and the detailed description together serve to explain specific principles of the invention.
Detailed description of the invention
Exemplary embodiment of the present is described in more detail in conjunction with the accompanying drawings, of the invention is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein in exemplary embodiments of the present invention, identical reference label is usual
Represent same parts.
Fig. 1 shows the flow chart of the step of inflating method in oil recovery process according to the present invention.
Fig. 2 shows routines to handle up, continuous driving is for the signal with cumulative oil production according to an embodiment of the invention
Figure.
Specific embodiment
The present invention will be described in more detail below with reference to accompanying drawings.Although showing the preferred embodiment of the present invention in attached drawing,
However, it is to be appreciated that may be realized in various forms the present invention and should not be limited by the embodiments set forth herein.On the contrary, providing
These embodiments are of the invention more thorough and complete in order to make, and can will fully convey the scope of the invention to ability
The technical staff in domain.
Fig. 1 shows the flow chart of the step of inflating method in oil recovery process according to the present invention.
In this embodiment, the inflating method in oil recovery process according to the present invention may include: to be divided according to total well number
Multiple well groups, respectively well group 1, well group 2 ..., well group n, each well group includes two mouthfuls of wells, respectively well 1 and well 2；For
Each well group carries out following steps: step 1: well 1 and well 2 to well group m carry out natural energy During Natural Depletion；Step 2:
The stage 1 of a cycle, well 1 carry out gas implant operation, and well 2 carries out oil-recovery operations；Step 3: in the rank of a cycle
Section 2, well 1 carry out stewing well operation, and well 2 carries out oil-recovery operations；Step 4: in the stage 3 of a cycle, well 1 carries out oil recovery behaviour
Make, well 2 carries out gas implant operation；Step 5: in the stage 4 of a cycle, well 1 carries out oil-recovery operations, and well 2 carries out stewing well
Operation；Step 6: step 1- step 5 being repeated to well group m, until the gas-oil ratio of well group m is lower than threshold value；Step 7: to well group m+1 weight
Multiple step 1- step 6, until well group n completes step 1- step 6；Wherein, n is well group quantity, 1≤m≤n-1.
In one example, gas includes: CO2, nitrogen, flue gas, natural gas, lighter hydrocarbons.
In one example, step 1 further include: pass through horizontal section length, well spacing, pressure break series, fracture half-length, matrix hole
Porosity, matrix permeability obtain gas injection parameter, stewing well parameter and petroleum production parameter.
In one example, step 1 further include: establish model for well group m, optimized by numerical simulation, obtained
Gas injection parameter, stewing well parameter and petroleum production parameter.
In one example, gas injection parameter includes gas injection time.
In one example, gas injection time is 40-80 days.
In one example, boiling in a covered pot over a slow fire well parameter includes the stewing well time.
In one example, boiling in a covered pot over a slow fire the well time is 20-40 days.
In one example, petroleum production parameter includes the time of recovering the oil.
In one example, the oil recovery time is 60-120 days.
Specifically, multiple well groups are divided according to total well number, respectively well group 1, well group 2 ..., well group n, each well group packet
Include Liang Koujing, respectively well 1 and well 2；For each well group, following steps are carried out: step 1: passing through horizontal section length, well
Away from, pressure break series, fracture half-length, matrix porosity, matrix permeability, obtain gas injection parameter, stewing well parameter and petroleum production parameter, be
Conventional steps, those skilled in the art can obtain gas injection parameter, stewing well parameter and petroleum production parameter according to design parameter, can also
To establish model for the parameters of well group m, to multiple gas injection parameters, multiple stewing well parameters and multiple adopted by numerical simulation
Oily parameter optimizes, preferably acquisition gas injection parameter, stewing well parameter and petroleum production parameter, carries out naturally to the well 1 and well 2 of well group m
Energy decline exploitation, wherein gas injection parameter includes gas injection time, and gas injection time is 40-80 days, and boiling in a covered pot over a slow fire well parameter includes when boiling in a covered pot over a slow fire well
Between, boiling in a covered pot over a slow fire the well time is 20-40 days, and petroleum production parameter includes the time of recovering the oil, and the time of recovering the oil is 60-120 days, and above-mentioned parameter is applied to
In following step；Step 2: in the stage 1 of a cycle, well 1 carries out gas implant operation, and well 2 carries out oil-recovery operations,
In, gas includes CO2, nitrogen, flue gas, natural gas, lighter hydrocarbons etc.；Step 3: in the stage 2 of a cycle, well 1 is boiled in a covered pot over a slow fire
Well operation, well 2 carry out oil-recovery operations；Step 4: in the stage 3 of a cycle, well 1 carries out oil-recovery operations, and well 2 carries out gas
Implant operation；Step 5: in the stage 4 of a cycle, well 1 carries out oil-recovery operations, and well 2 carries out stewing well operation；Step 6: to well
Group m repeats step 1- step 5, until the gas-oil ratio of well group m is lower than threshold value, threshold value can be determined by economic benefit, for example be changed
The ratio of oil cut rate, i.e. output oil mass and the amount of injection gas；Step 7: step 1- step 6 being repeated to well group m+1, until well group n
Complete step 1- step 6.Step of the invention is as shown in table 1.
Table 1
Each cycle memory of the invention can realize effective displacement in gas injection, oil recovery process between well；There are stewing well mistakes
Journey gives full play to the diffusion to matrix, extraction mechanism in the process of the stewing well of gas；There are the reverse displacements of two mouthfuls of wells, can be effective
Inhibit has channeling.Method of the invention can handle up in conjunction with gas and the advantages of displacement, with less gas injection rate, obtain preferable
Gas injection development effectiveness.
Using example 1
A concrete application example is given below in the scheme and its effect of the embodiment of the present invention for ease of understanding.This field
It should be understood to the one skilled in the art that the example is only for the purposes of understanding the present invention, any detail is not intended to be limited in any way
The system present invention.
By taking two mouthfuls of water horizontal wells as an example, well 1 and the composition well group 1 of well 2,1500 meters of horizontal section length, 500 meters of well spacing, pressure break grade
15 sections of number, 100 meters of fracture half-length, there are intrinsic fracture, matrix porosity 7%, matrix permeability 0.3mD for oil reservoir.This hair
Bright specific step is as follows shown in table: step 1: carrying out natural energy During Natural Depletion to two mouthfuls of wells；Step 2: in a cycle
Stage 1, well 1 operate within gas injection (60 days), and well 2 is recovered the oil (60 days) and operated；Step 3: in the rank of a cycle
Section 2, well 1 carry out stewing well and operate for (30 days), and well 2 is recovered the oil (30 days) and operated；Step 4: in the stage 3 of a cycle, well 1
It is recovered the oil (60 days) and is operated, well 2 operate within gas injection (60 days)；Step 5: in the stage 4 of a cycle, well 1 into
Row recovers the oil (30 days) and operates, and well 2 carries out stewing well and operates for (30 days)；Step 6: step 1- step 5 being repeated to well group 1, until well group 1
Gas-oil ratio be lower than threshold value, entire gas injection body, which improves recovery ratio process, to be terminated, this is as shown in table 2 using exemplary step.
Table 2
Comparative example 1
In order to preferably compare using exemplary effect, one of comparative example is completely using the method routinely handled up, single-revolution
The time in each stage is consistent with application example in phase.Its step are as follows: step 1: carrying out natural energy to two mouthfuls of wells of well group 1
During Natural Depletion；Step 2: in the stage 1 of a cycle, well 1 and well 2 carry out operating for gas injection (60 days) respectively；Step 3:
In the stage 2 of a cycle, well 1 and well 2 carry out stewing well respectively and operate for (30 days)；Step 4: in the stage 3 of a cycle,
Well 1 and well 2 are recovered the oil (60 days) respectively and are operated；Step 5: in the stage 4 of a cycle, well 1 and well 2 recover the oil respectively
It operates within (30 days)；Step 6: step 1- step 5 being repeated to well group 1, until the gas-oil ratio of well group 1 is lower than threshold value, entire gas injection body
Improving recovery ratio process terminates.The step of comparative example is routinely handled up is as shown in table 3.
Table 3
Comparative example 2
In order to preferably compare effect of the invention, one of comparative example replaces method using continuous driving, and its step are as follows: first
It walks two mouthfuls of wells and carries out natural energy During Natural Depletion；Step 2: well 1 carries out gas implant operation, well 2 carries out oil-recovery operations.It is total
The oil recovery time it is consistent with method of the invention.The step of comparative example continuous driving replaces is as shown in table 4.
Table 4
Fig. 2 shows routines to handle up, continuous driving is for the signal with cumulative oil production according to an embodiment of the invention
Figure, can be obtained by Fig. 2, and after the time of recovering the oil reaching 6 months 1 year, the oil production obtained according to the method for the present invention is more than conventional
It handles up and is replaced with continuous driving, therefore, from oil production this it appears that method of the invention is replaced better than conventional handle up with continuous driving.
In conclusion each cycle memory of the invention can realize effective displacement in gas injection, oil recovery process between well；
There are stewing well processes, give full play to the diffusion to matrix, extraction mechanism in the process of the stewing well of gas；There are the reversed drives of two mouthfuls of wells
It replaces, can effectively inhibit has channeling.Method of the invention can handle up in conjunction with gas and the advantages of displacement, be injected with less gas
Amount, obtains the development effectiveness of preferable gas injection.
It will be understood by those skilled in the art that above to the purpose of the description of the embodiment of the present invention only for illustratively saying
The beneficial effect of bright the embodiment of the present invention is not intended to limit embodiments of the invention to given any example.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. the inflating method in a kind of oil recovery process, comprising:
Divide multiple well groups according to total well number, respectively well group 1, well group 2 ..., well group n, each well group includes two mouthfuls of wells, point
It Wei not well 1 and well 2；
For each well group, following steps are carried out:
Step 1: well 1 and well 2 to well group m carry out natural energy During Natural Depletion；
Step 2: well 1 carries out gas implant operation, and well 2 carries out oil-recovery operations；
Step 3: well 1 carries out stewing well operation, and well 2 carries out oil-recovery operations；
Step 4: well 1 carries out oil-recovery operations, and well 2 carries out gas implant operation；
Step 5: well 1 carries out oil-recovery operations, and well 2 carries out stewing well operation；
Step 6: step 1- step 5 being repeated to well group m, until the gas-oil ratio of well group m is lower than threshold value；
Wherein, n is well group quantity, 1≤m≤n.
2. the inflating method in oil recovery process according to claim 1, wherein the gas includes: CO2, nitrogen, flue
Gas, natural gas, lighter hydrocarbons.
3. the inflating method in oil recovery process according to claim 1, wherein step 1 further include: pass through horizontal segment length
Degree, well spacing, pressure break series, fracture half-length, matrix porosity, matrix permeability obtain gas injection parameter, stewing well parameter and ginseng of recovering the oil
Number.
4. the inflating method in oil recovery process according to claim 1, wherein step 1 further include: established for well group m
Model is optimized by numerical simulation, obtains gas injection parameter, stewing well parameter and petroleum production parameter.
5. the inflating method in oil recovery process according to claim 3 or 4, wherein when the gas injection parameter includes gas injection
Between.
6. the inflating method in oil recovery process according to claim 5, wherein the gas injection time is 40-80 days.
7. the inflating method in oil recovery process according to claim 3 or 4, wherein when the stewing well parameter includes stewing well
Between.
8. the inflating method in oil recovery process according to claim 7, wherein the stewing well time is 20-40 days.
9. the inflating method in oil recovery process according to claim 3 or 4, wherein the petroleum production parameter includes when recovering the oil
Between.
10. the inflating method in oil recovery process according to claim 9, wherein the oil recovery time is 60-120 days.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459752A (en) * | 2020-11-15 | 2021-03-09 | 五矿盐湖有限公司 | Method for determining air driving distance in air driving halogen extraction method |
| CN114753817A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气股份有限公司 | Multi-well carbon dioxide huff-puff mining method and gas injection and production device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332678A (en) * | 2014-07-29 | 2016-02-17 | 中国石油化工股份有限公司 | Gas injection swallowing-spitting method |
| CN106761606A (en) * | 2017-02-14 | 2017-05-31 | 中国石油大学(北京) | The asynchronous note CO of different well of symmetrical expression cloth seam2Oil production method |
| CN107701158A (en) * | 2017-10-23 | 2018-02-16 | 中国石油天然气股份有限公司 | The method for exploiting foam type extra heavy oil |
| CN207093050U (en) * | 2017-08-01 | 2018-03-13 | 中国石油天然气股份有限公司 | A kind of gas drive well pattern structure of high water cut rate high inclination-angle LOW PERMEABILITY RESERVOIR |
-
2018
- 2018-03-30 CN CN201810279521.3A patent/CN110318717A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332678A (en) * | 2014-07-29 | 2016-02-17 | 中国石油化工股份有限公司 | Gas injection swallowing-spitting method |
| CN106761606A (en) * | 2017-02-14 | 2017-05-31 | 中国石油大学(北京) | The asynchronous note CO of different well of symmetrical expression cloth seam2Oil production method |
| CN207093050U (en) * | 2017-08-01 | 2018-03-13 | 中国石油天然气股份有限公司 | A kind of gas drive well pattern structure of high water cut rate high inclination-angle LOW PERMEABILITY RESERVOIR |
| CN107701158A (en) * | 2017-10-23 | 2018-02-16 | 中国石油天然气股份有限公司 | The method for exploiting foam type extra heavy oil |
Non-Patent Citations (2)
| Title |
|---|
| 何应付 等: "特低渗透油藏注CO2 驱油注入方式研究", 《石油天然气学报（江汉石油学院学报）》 * |
| 吴忠宝 等: "体积改造油藏注水吞吐有效补充", 《油气地质与采收率》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459752A (en) * | 2020-11-15 | 2021-03-09 | 五矿盐湖有限公司 | Method for determining air driving distance in air driving halogen extraction method |
| CN114753817A (en) * | 2021-01-08 | 2022-07-15 | 中国石油天然气股份有限公司 | Multi-well carbon dioxide huff-puff mining method and gas injection and production device |
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