CN116696292A - Oil extraction control method - Google Patents
Oil extraction control method Download PDFInfo
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- CN116696292A CN116696292A CN202310812411.XA CN202310812411A CN116696292A CN 116696292 A CN116696292 A CN 116696292A CN 202310812411 A CN202310812411 A CN 202310812411A CN 116696292 A CN116696292 A CN 116696292A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000000605 extraction Methods 0.000 title claims abstract description 20
- 238000003825 pressing Methods 0.000 claims description 48
- 238000011084 recovery Methods 0.000 claims description 9
- 230000006641 stabilisation Effects 0.000 abstract description 16
- 238000011105 stabilization Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 230000000903 blocking effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000003129 oil well Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002789 length control Methods 0.000 description 3
- 238000000195 production control method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect 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
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The utility model belongs to the technical field of oil extraction in an oil field, and particularly relates to an oil extraction control method. When the pressure pulse length is adopted to control the corresponding underground device when the pressure is unstable, the time length for the pressure to reach the set pressure threshold is judged to reach different set time thresholds in the second control time period, and different control signals are identified according to the set time thresholds to control the corresponding underground device to act, so that the layer adjusting operation of oil extraction control is completed, and the problem that misoperation of the underground device is caused because a sufficient number of control pulse signals cannot be completed in a specified time period can be avoided; when the pressure stabilization is judged, the length of the pressure pulse or the number of the pressure pulse can be flexibly selected for control; the pressure pulse length used for control can be discontinuously stabilized, so that the corresponding downhole device can be controlled through the pressure pulse length even if a stable pressure pulse signal cannot be formed for a long time.
Description
Technical Field
The utility model belongs to the technical field of oil extraction in an oil field, and particularly relates to an oil extraction control method.
Background
In the later period of oil well exploitation, the oil content is reduced, so that the water content of the oil layer is increased, and the water is layered and blocked for improving the yield and realizing water control and oil stabilization by using a water blocking device. The mechanical water-blocking finding technology is a water-blocking technology commonly used in oilfield development and production, and is characterized in that a multistage immobile pipe column is usually lowered into an oil well, a slip packer and a water-blocking finding switch are placed in the pipe column, and the water-containing condition of each layer is judged according to the condition of produced fluid during normal production of a production layer so as to determine a high-water-content layer, and the corresponding production layer water-blocking finding switch is closed by annular hydraulic pressure, so that the purpose of water blocking finding of the immobile pipe column is achieved.
If the Chinese patent document with the publication number of CN202866752U discloses a push-type underground water finding and plugging switch device, a water finding and plugging pipe column is formed by the push-type underground water finding and plugging switch device, a packer, a plug, a release and the like when the push-type underground water finding and plugging switch device is used, the packer is set and then released, and the underground water finding and plugging switch device performs water finding and plugging work through a ground pressure pulse signal; the switch of the underground water finding and blocking switch is controlled by the number of pressing times within a certain period, the pressure value is in the range of 5MPa to 10MPa, the singlechip receives the pressure pulse signals, and the singlechip counter is set to receive 5 pulse signals within 10 minutes to drive the push-type water finding and blocking switch to be opened; and when 8 signals are received within 10 minutes, the push type water finding and blocking switch is driven to be closed.
Although the control method can realize the operation of finding and blocking water in an oil well, a plurality of pressure pulse signals are required to be completed within a period of time, after an old oil field enters the middle and later stages of development, the oil well is provided with a casing leakage and other reasons, so that the pressing cannot be fast stabilized, and stable pressure pulse signals cannot be fast formed, so that the enough pulse signals cannot be completed within a specified period of time, the receiving and the identification of the signals by an underground device are interfered, and the problem of misoperation of the underground device is caused.
Disclosure of Invention
The utility model aims to provide an oil extraction control method which is used for solving the problem that the conventional oil extraction control method for controlling the on-off of an underground water finding and blocking switch device through the pressing times can not finish enough control pulse signals within a specified time period to cause misoperation of an underground device.
In order to achieve the above object, the present utility model provides a method for controlling oil recovery, comprising the steps of:
1) In a first control time period, performing first pressing, and judging whether the pressing pressure is stable or not;
2) If the pressing pressure is stable, selecting to control the corresponding underground device by adopting the length of the pressure pulse or the number of the pressure pulse; if the pressing pressure is unstable, selecting to control the corresponding underground device by adopting the pressure pulse length;
the method for controlling the layer by adopting the pressure pulse length comprises the following steps:
in the second control time period, if the time length of the pressing reaching the set pressure threshold reaches different set time thresholds, identifying different control signals according to the set time thresholds so as to control the corresponding downhole device to act; the second control period is set after the first control period.
The beneficial effects of the technical scheme are as follows: when the pressure pulse length is adopted to control the corresponding underground device when the pressure is unstable, the time length for which the pressure reaches the set pressure threshold is judged to reach different set time thresholds in a second control time period, and different control signals are identified according to the set time thresholds to control the corresponding underground device to act, so that the layer adjusting operation of oil extraction control is completed, and the problem that misoperation of the underground device is caused because a sufficient number of control pulse signals cannot be completed in a specified time period can be avoided; and when the pressure stabilization is judged, the corresponding underground device can be flexibly controlled by adopting the pressure pulse length or the pressure pulse quantity.
Further, the selection mode of controlling the corresponding downhole device by adopting the pulse length or the pulse number is as follows:
if the first pressurizing is carried out, pressurizing is carried out again in the first control time period, and the corresponding underground device is judged to be controlled by adopting the number of pressure pulses;
if the first pressing is not performed again in the first control time period, the selection of the adoption of the pressure pulse length to control the corresponding underground device is judged.
The beneficial effects of the technical scheme are as follows: setting that only one control mode corresponding to the pressure pulse length exists in the first control time period, otherwise, selecting the control mode corresponding to the pressure pulse number, so as to avoid the condition that the control mode selection is wrong because the number of the pressurized pulses in the first control time period is insufficient due to the fact that the number of the pressure pulses required for selecting the control mode is excessive.
Further, a third control time period is arranged between the first control time period and the second control time period; and if the pressurizing reaches the corresponding pressure threshold value in the third control time period, canceling the selection result of controlling the corresponding downhole device by adopting the pressure pulse length or the pressure pulse number, and restarting the step 1 from the first control time period.
The beneficial effects of the technical scheme are as follows: and the selection of the control mode adopting the pressure pulse length or the pressure pulse quantity can be canceled and reset by carrying out corresponding pressing operation in the third control time period, so that the control mode can be modified in time before starting control.
Further, the manner of judging that the duration of the pressing to reach the set pressure threshold reaches the set time threshold is as follows:
and if the duration of continuous pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, or the total duration of pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, judging that the duration of pressing reaching the set pressure threshold value reaches the set time threshold value.
The beneficial effects of the technical scheme are as follows: the pressure pulse length adopted by the control mode corresponding to the pressure pulse length can realize discontinuous pressure stabilization, so that the corresponding underground device can be controlled by the pressure pulse length under the condition that the pressure cannot form a stable pressure pulse signal for a long time.
Further, if there is no pressure pulse in the second control period, it is determined that the present control operation is canceled, and the next control operation is performed again in step 1 from the first control period.
Drawings
FIG. 1 is a schematic diagram of a layered oil production process string to which the oil production control method is applied in an embodiment of the oil production control method of the present utility model; wherein 1 is an oil pipe, 2 is a pump, 3 is a screen pipe, 4 is a tail pipe, 5 is a packer, 6 is a first intelligent switch, 7 is a packer, 8 is a second intelligent switch, and 9 is a plug;
FIG. 2 is a schematic diagram of a pressure pulse signal for selectively controlling a corresponding downhole device using a pressure pulse length in an embodiment of a method for controlling oil recovery according to the present utility model;
FIG. 3 is a schematic diagram of a pressure pulse signal for selectively using the number of pressure pulses to control a corresponding downhole device in an embodiment of a method for controlling oil recovery according to the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
Oil production control method embodiment
The embodiment provides a technical scheme of an oil extraction control method, and a structure of a layered oil extraction process pipe column applying the oil extraction control method is shown in fig. 1, wherein the layered oil extraction process pipe column comprises a production pipe column and a release pipe column; the production pipe column comprises an oil pipe 1, a pump 2, a screen pipe 3 and a tail pipe 4 from top to bottom, and is sequentially connected in a threaded manner; the releasing pipe column comprises a packer 5, a first intelligent switch 6, a packer 7, a second intelligent switch 8 and a plug 9 which are sequentially connected in a threaded manner; in the implementation process, ground pressing is carried out through the pump, pressure is downwards transmitted to the inside of the releasing string through the annular space between the oil pipe and the sleeve pipe, the first intelligent switch device 6 and the second intelligent switch device 8 can receive and identify pressure signals, and the pressure signals can be realized through a single chip microcomputer or other modes.
In this embodiment, taking two-layer layered oil extraction of an oil well as an example, the oil extraction control method is described, and the oil extraction control method includes the following steps:
1) In a first control time period, performing first pressing, and judging whether the pressing pressure is stable or not;
the first control time period corresponds to the time period t0 in fig. 2 and 3, is used for on-site observation and judgment of a target well for oil extraction, and is used for controlling a corresponding underground device by using a pulse number control layer or a pulse length correspondingly; in this embodiment, the controlled downhole devices are a first intelligent switch 6 and a second intelligent switch 8, i.e. the layer-adjusting of the layered oil recovery is controlled by the on/off of the first intelligent switch 6 and the second intelligent switch 8.
In this embodiment, in the period of t0, after the ground is pressed to the set test threshold (the set test threshold in this embodiment is 5 MPa), a pulse is formed, then the pump is stopped to hold the pressure, and the pressure drop condition is observed, so as to determine whether the pressing pressure is stable; the pressure drop condition of the site is divided into two types at present, wherein the first type is pressure stabilization, and after the ground is pressurized to 5MPa, the pressure stabilization after the pump is stopped can be observed, and the pressurized pressure is judged to be stable; the second is that the pressure is stable, when the ground is pressurized to 5MPa, the situation can observe that the pressure rising process is slow, the pressure can be reduced after the pump is stopped, the gear of the pump truck is required to be continuously adjusted, the pressure can be kept stable only when the gear is determined, and the pressurized pressure is judged to be unstable.
2) If the pressing pressure is stable, selecting to control the corresponding underground device by adopting the length of the pressure pulse or the number of the pressure pulse; if the pressing pressure is unstable, selecting to control the corresponding underground device by adopting the pressure pulse length;
if the pressing pressure is unstable, it is indicated that it is difficult to complete enough pulse signals within a specified time period, and in order to avoid the problem that the malfunction of the downhole device occurs due to the failure to complete enough control pulse signals within the specified time period, the embodiment can selectively control the corresponding downhole device by using the pressure pulse length, which specifically includes:
in the second control time period, if the time length of the pressing reaching the set pressure threshold reaches different set time thresholds, identifying different control signals according to the set time thresholds so as to control the corresponding downhole device to act; the second control period is set after the first control period.
The second control time period corresponds to the time period t2 in fig. 2 and 3, belongs to a control instruction input stage of the intelligent switch, and is used for generating different control signals through different pressing time periods; in this embodiment, the set pressure thresholds are all 5MPa, and in the t2 time period (in this embodiment, the t2 time period is taken as an example for 30 minutes), the pressure is pumped to 5MPa by the pump truck, and after the pressure stabilization is set for 1-10 minutes, the pressure is released, and then the control signal corresponding to the closing action is determined to be executed by the intelligent switch 6; the pressure is relieved after the pressure is stabilized for 11-20 minutes, the control signal corresponding to the closing action is judged to be executed by the intelligent switch 8, the pressure is relieved after the pressure is stabilized for 21-30 minutes, the control signals corresponding to the opening action are judged to be executed by the intelligent switches 6 and 8, and the opening and closing actions are executed by the intelligent switches 6 and 8 according to the corresponding control signals; in other embodiments, the set pressure threshold corresponding to different control signals may be different, for example, if the set pressure is set to 5MPa by the pump truck, and the pressure is released after the pressure is stabilized for 1-10 minutes, it is determined that the intelligent switch 6 executes the control signal corresponding to the off action; the control signal corresponding to the closing action of the intelligent switch 8 is judged by setting the pressure of the pump truck to 10MPa and releasing the pressure after stabilizing the pressure for 11-20 minutes.
In this embodiment, the manner of determining that the duration of the pressing to reach the set pressure threshold reaches the set time threshold is: and if the duration of continuous pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, or the total duration of pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, judging that the duration of pressing reaching the set pressure threshold value reaches the set time threshold value. Namely, the control mode corresponding to the pressure pulse length can realize discontinuous pressure stabilization in the t2 time period, and finally the total pressure stabilization time length in the t2 time period is identified as the pressure pulse length, so that the intelligent switch can be controlled through the pressure pulse length under the condition that the pressure cannot form a stable pressure pulse signal for a long time.
If the pressing pressure is stable, the condition that enough pulse signals can be completed in a specified time period is indicated, so that the length of the pressure pulse can be selected and adopted, and the corresponding underground device can be controlled by selecting the number of the pressure pulse; fig. 2 is a schematic diagram of a pressure pulse signal for selectively controlling a pressure pulse length, and fig. 3 is a schematic diagram of a pressure pulse signal for selectively controlling a pressure pulse number, that is, a selection manner for controlling a corresponding downhole device by correspondingly using a pulse length or a pulse number, where:
referring to the t0 time period in fig. 2, if the first pressurizing is performed in the t0 time period and then the pressurizing is not performed again in the time period (i.e. only one pressure pulse exists in the t0 time period), it is determined that the corresponding downhole device is controlled by using the pressure pulse length; referring to the t0 time period in fig. 3, if the first pressing is performed and then the pressing is performed again in the t0 time period (i.e., there are a plurality of pressure pulses in the t0 time period), it is determined that the corresponding downhole device is selectively controlled by the number of pressure pulses; in other embodiments, the number of pressure pulses in the t0 time period may be set to be less than or equal to the set number threshold, and if the number of pressure pulses is less than or equal to the set number threshold, the corresponding downhole device is determined to be controlled by the length of the pressure pulses, otherwise, the corresponding downhole device is determined to be controlled by the number of pressure pulses; in this embodiment, in order to avoid that the number of pressure pulses required for selecting the control mode is too large, which results in insufficient number of pulses for pressing in the t0 time period, and results in errors in selecting the control mode, only one pressure pulse is directly set in the t0 time period to select the control mode corresponding to the length of the pressure pulse, otherwise, the control mode corresponding to the number of the pressure pulses is selected.
In this embodiment, a third control period t1 is set between the first control period t0 and the second control period t 2; if the pressing reaches the pressure threshold corresponding to reselection in the time period t1 (in this embodiment, the pressure threshold corresponding to reselection is also 5 MPa), as shown by the dashed pulse in the time period t1 in fig. 2 and 3, the selection result of controlling the corresponding downhole device by using the pressure pulse length or the pressure pulse number is canceled, and step 1) is performed again from the first control time period t 0; therefore, after the pressing in the t0 time period is finished, if a field technician finds that the time period needs to enter the t0 time period to carry out judgment again, the pressure can be released after the pressing in the t1 time period (the time period is set to be within 10 minutes in the embodiment and can be set according to actual conditions in other embodiments), so that the control process is in an initial state, and the control mode is convenient to reselect.
If there is no pressure pulse in the second control period t2, it is determined that the present control operation is canceled, and the next control operation is performed again in step 1 from the first control period t 0.
Specifically, the pressing command (pressure pulse signal) corresponding to the pulse length control method and the pulse number control method are shown in table 1, and correspond to fig. 2 and 3; wherein, the wave head is t0 and t1 time period;
TABLE 1
Pressurizing to 5MPa by a pump truck on site, stopping the pump and observing the pressure drop condition; let t0 be 10 minutes and t2 be 30 minutes, the overall oil recovery control process (including various operating conditions) will be illustrated in detail:
(1) the pressure is stable within 1 minute, the pressing pressure is judged to be stable, and then the pressure is released. And in the time period t0 (within 10 minutes), the technician manually or the corresponding control equipment automatically determines to select the pulse length control tuning layer or the pulse number control tuning layer, and the time period t0 is ended.
And selecting the condition of pulse length control layer adjustment, pressing to 5MPa by a pump truck in a time period t2 (within 30 minutes), setting pressure stabilization for 1-10 minutes, releasing pressure, executing closing action by the intelligent switch 6, releasing pressure after pressure stabilization for 11-20 minutes, executing closing action by the intelligent switch 8, releasing pressure after pressure stabilization for 21-30 minutes, and executing opening actions by the intelligent switches 6 and 8.
And (3) selecting the condition of controlling the layer adjustment by pulse times, wherein the pressure release process is carried out 1 time after the pump truck is pressed to 5MPa to control the switch 6 to execute the closing action, the pressure release process is carried out 2 times, the switch 8 is executed to execute the closing action, and the pressure release process is carried out 3 times, and the switches 6 and 8 are executed to execute the opening action within 30 minutes.
(2) The pump truck continuously adjusts the pump displacement after the pressure is not started within 1 minute, and the pressure can be stabilized after the completion of the pressure starting under the condition of one gear displacement; from this, it is determined that the pressing pressure is unstable, the pulse length is selected to control the layer adjustment, in the time period t2, in this embodiment, the pump truck needs to press to 5MPa within 30 minutes, the pressure is released after setting the pressure stabilization for 1-10 minutes, the intelligent switch 6 performs the closing action, the pressure is released after setting the pressure stabilization for 11-20 minutes, the intelligent switch 8 performs the closing action, the pressure is released after setting the pressure stabilization for 21-30 minutes, and the intelligent switches 6 and 8 both perform the opening action.
The utility model has the following characteristics:
1) When the pressure pulse length is adopted to control the corresponding underground device when the pressure is unstable, the time length for which the pressure reaches the set pressure threshold is judged to reach different set time thresholds in the second control time period, and different control signals are identified according to the reached set time thresholds so as to control the corresponding underground device to act, thereby completing the layer adjusting operation of oil extraction control, and further avoiding the problem that misoperation of the underground device is caused because a sufficient number of control pulse signals cannot be completed in the specified time period.
2) When the pressure stabilization is judged, the corresponding underground device can be flexibly controlled by adopting the pressure pulse length or the pressure pulse quantity, and the first control time period is directly set to have only one control mode of which the pressure pulse length corresponds, otherwise, the control mode of which the pressure pulse quantity corresponds is selected, so that the condition that the error in the selection of the control mode is caused by insufficient number of the pressure pulses in the first control time period due to the excessive number of the pressure pulses required by the selection of the control mode is avoided.
3) The pressure pulse length adopted by the control mode corresponding to the pressure pulse length can be discontinuously stabilized, and the total stabilized time length in the second control time period is finally identified as the pressure pulse length, so that the corresponding underground device can be controlled by the pressure pulse length under the condition that the stabilized pressure pulse signal cannot be formed for a long time by the pressurizing is ensured.
4) A third control time period is arranged between the first control time period and the second control time period; and the selection of the control mode adopting the pressure pulse length or the pressure pulse quantity can be canceled and reset by carrying out corresponding pressing operation in the third control time period, so that the control mode can be modified in time before starting control.
It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model.
Claims (5)
1. The oil extraction control method is characterized by comprising the following steps of:
1) In a first control time period, performing first pressing, and judging whether the pressing pressure is stable or not;
2) If the pressing pressure is stable, selecting to control the corresponding underground device by adopting the length of the pressure pulse or the number of the pressure pulse; if the pressing pressure is unstable, selecting to control the corresponding underground device by adopting the pressure pulse length;
the method for controlling the layer by adopting the pressure pulse length comprises the following steps:
in the second control time period, if the time length of the pressing reaching the set pressure threshold reaches different set time thresholds, identifying different control signals according to the set time thresholds so as to control the corresponding downhole device to act; the second control period is set after the first control period.
2. The oil recovery control method according to claim 1, wherein the selection of the pulse length or the pulse number to control the corresponding downhole device is:
if the first pressurizing is carried out, pressurizing is carried out again in the first control time period, and the corresponding underground device is judged to be controlled by adopting the number of pressure pulses;
if the first pressing is not performed again in the first control time period, the selection of the adoption of the pressure pulse length to control the corresponding underground device is judged.
3. The oil recovery control method according to claim 1, wherein a third control period is provided between the first control period and the second control period; and if the pressurizing reaches the corresponding pressure threshold value in the third control time period, canceling the selection result of controlling the corresponding downhole device by adopting the pressure pulse length or the pressure pulse number, and restarting the step 1 from the first control time period.
4. A method of controlling oil recovery according to any one of claims 1 to 3, wherein the means for determining that the duration of the depression reaching the set pressure threshold reaches the set time threshold is:
and if the duration of continuous pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, or the total duration of pressing reaching the set pressure threshold value in the second control time period reaches the set time threshold value, judging that the duration of pressing reaching the set pressure threshold value reaches the set time threshold value.
5. A method of controlling oil recovery according to any one of claims 1-3, wherein if there is no pressure pulse in the second control period, it is determined that the present control operation is canceled, and the next control operation is resumed in step 1 from the first control period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310812411.XA CN116696292A (en) | 2023-07-04 | 2023-07-04 | Oil extraction control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310812411.XA CN116696292A (en) | 2023-07-04 | 2023-07-04 | Oil extraction control method |
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| Publication Number | Publication Date |
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| CN116696292A true CN116696292A (en) | 2023-09-05 |
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| CN202310812411.XA Pending CN116696292A (en) | 2023-07-04 | 2023-07-04 | Oil extraction control method |
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2023
- 2023-07-04 CN CN202310812411.XA patent/CN116696292A/en active Pending
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