CN109538179B - Underground self-adaptive water injection control device and control method - Google Patents
Underground self-adaptive water injection control device and control method Download PDFInfo
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- CN109538179B CN109538179B CN201811603371.3A CN201811603371A CN109538179B CN 109538179 B CN109538179 B CN 109538179B CN 201811603371 A CN201811603371 A CN 201811603371A CN 109538179 B CN109538179 B CN 109538179B
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- 238000002347 injection Methods 0.000 title claims abstract description 189
- 239000007924 injection Substances 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
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- 238000010276 construction Methods 0.000 claims description 5
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- 239000003673 groundwater Substances 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002349 well water Substances 0.000 claims description 3
- 235000020681 well water Nutrition 0.000 claims description 3
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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
- E21B43/20—Displacing by water
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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
- E21B43/14—Obtaining from a multiple-zone well
Abstract
The application discloses an underground self-adaptive water injection control device and a control method, wherein the device comprises a self-adaptive control system, a ground controller and an underground self-adaptive water distributor; the self-adaptive control system and the ground controller are arranged on the ground, and the underground self-adaptive water distributor is arranged in an underground oil pipe; a packer and an underground self-adaptive water distributor are sequentially arranged in the oil pipe at intervals from top to bottom, and the lower end of the oil pipe is connected with an underground accessory; the ground controller is connected with the packer and the underground self-adaptive water distributor through the remote communication module, and is connected with the ground control valve through a cable. The automatic control of the separate layer water injection is realized by testing the formation pressure according to the liquid production amount and the reservoir pressure data through the downhole self-adaptive water distributor through the well completion of the lower tool, separate layer water injection and intelligent control starting, so that the automatic control of the separate layer water injection is realized, and the reasonable water injection pressure and the reservoir water injection amount of the stratum are ensured.
Description
Technical Field
The application belongs to the technical field of fine separate-layer water injection in an oil field, and particularly relates to a downhole self-adaptive water injection control device and a control method.
Background
For a long time, long-day oil fields closely surround the development characteristics of low-permeability oil reservoir small-water-volume directional wells, and fine injection technology attack and investigation are carried out, so that a directional well small-water-volume separate-layer water injection technology series is formed preliminarily, and the technical requirements of separate-layer water injection are met to a certain extent. However, the early-stage attack research is mainly focused on technological means, only how to realize underground water distribution qualification in terms of technology is considered, the water injection requirement condition of a reservoir is not considered, meanwhile, the problems of large manual work workload, multiple construction procedures, high field production cost and the like exist in the prior art, manual operation can only be performed at a wellhead, the underground instrument is controlled to adjust the layering flow, the layering water injection dynamics cannot be monitored for a long time, the influence of factors such as pressure fluctuation, reservoir water absorption capacity change and the like is avoided, the distribution qualification rate is reduced rapidly, and the fine water injection technical requirement cannot be met.
The existing layered flow measurement and adjustment process is complex, the testing workload of a separate injection well is large, the site construction cost is high, the well head is required to be operated on site, the well head is not organically combined with oil reservoir research, the process still stays in the condition of enough water injection, and the technical requirements of efficient, reasonable and sustainable development of the oil reservoir cannot be guaranteed.
Disclosure of Invention
In order to solve the defects in the prior art, the application aims to provide the self-adaptive water injection control device and the control method, which are used for realizing automatic testing and automatic adjustment of underground layered flow, long-term testing and storage of dynamic data, ground and underground remote wireless data transmission, combination of reservoir liquid yield and reasonable pressure level, and the self-adaptive water distribution control device is used for automatically controlling the layered water injection parameters, organically combining the reservoir with the process, ensuring efficient, reasonable and sustainable development of the reservoir and greatly improving the reservoir recognition and development level.
The application is realized by the following technical scheme.
The underground self-adaptive water injection control method provided by the embodiment of the application comprises the following steps:
step one: lower tool completion
Placing the packer, the self-adaptive water distributor and the downhole accessories in an oil pipe string respectively, putting into a shaft, and pressing and setting;
step two: layered test injection
Setting initial parameters in the self-adaptive water distributor before the well is put into the well, automatically opening a water nozzle, recovering the ground water injection flow, sending geological injection allocation requirements to a ground controller by the self-adaptive control system through an SCADA (supervisory control and data acquisition) system, starting ground water injection by the ground controller, sending layered initial injection allocation quantity to the underground self-adaptive water distributor, automatically adjusting layered test injection by the underground self-adaptive water distributor, and recovering the layered water injection pressure of a reservoir to a normal level before the construction of a separated injection pipe column;
step three: separate layer water injection mode
The self-adaptive control system provides data comprising the liquid production amount and the reservoir pressure of the corresponding oil well according to the oil-water well injection and production balance principle, generates corresponding control instructions, and transmits the control instructions to the underground self-adaptive water distributor through the ground controller by the SCADA system so as to set a separate-layer water injection mode;
step four: start intelligent control function
The ground display displays water injection dynamic parameters including the whole well water injection quantity, flow pressure, water injection pressure, control valve opening, water injection pipe column structure, underground layered flow, layered pressure and layered accumulated flow, and the underground self-adaptive water distributor automatically controls the layered flow according to the liquid production quantity and the reservoir pressure data, and the formation pressure is tested, so that the automatic control of the layered water injection is realized.
Preferably, the separate-layer water injection mode comprises a separate-layer constant-pressure water injection mode, according to a water injection pressure instruction sent by the self-adaptive control system, the self-adaptive water distributor tests the water injection pressure after the flow control valve through the external pressure gauge, then sends a test result to the control nipple, the test pressure value of the control nipple is compared with the water injection pressure instruction sent by the self-adaptive control system, and if the difference is less than 5%, the original water injection state is maintained; if the difference is more than 5%, the flow control valve is automatically regulated, the water injection pressure is controlled after the valve is opened by regulating the control valve, and when the water injection pressure reaches 5%, the automatic control action is stopped, and the whole regulating process is automatically executed without manual intervention.
Preferably, the layered water injection mode comprises a layered constant flow water injection mode, the self-adaptive water distributor tests the water flow of the flow control valve through the flowmeter according to the water injection flow instruction sent by the self-adaptive control system, then sends the test result to the control nipple, the control nipple test flow value is compared with the water injection flow instruction sent by the self-adaptive control system, and if the difference is less than 20%, the original water injection state is maintained; if the difference is more than 20%, the flow control valve is automatically regulated, the flow is controlled by regulating the opening of the control valve, and when the flow reaches 20%, the automatic control action is stopped, and the whole regulation process is automatically executed without manual intervention.
Preferably, the water injection pressure set by the layered constant pressure water injection mode is set according to the formation pressure and the formation pressure maintenance level in the layered pressure drop test data and the block development design level;
in a region with good reservoir physical properties, under the condition of considering the injection ratio, the water injection pressure is designed to be 0.9 times of the stratum pressure; in the area with poor reservoir physical properties, the water injection pressure is designed to be 1.05 times of the stratum pressure under the condition of taking the injection ratio into consideration. The injection ratio is 1.1-1.5.
The application correspondingly provides an underground self-adaptive water injection control device which comprises a self-adaptive control system, a ground controller and an underground self-adaptive water distributor; the self-adaptive control system and the ground controller are arranged on the ground, and the underground self-adaptive water distributor is arranged in an underground oil pipe; the packer and the underground self-adaptive water distributor are sequentially arranged in the oil pipe at intervals from top to bottom, and the lower end of the oil pipe is connected with an underground accessory; the ground controller is connected with the packer and the underground self-adaptive water distributor through the remote communication module, and is connected with the ground control valve through a cable.
Preferably, the downhole adaptive water distributor comprises an upper joint, an outer casing and a lower joint; the outer casing is internally provided with a flow passage, the outer layer of the flow passage is provided with a sealing cavity, and a control module, a battery, a control nipple and a flowmeter are arranged in the sealing cavity.
Preferably, sealing rings are arranged between the upper connector, the lower connector and the outer casing.
Preferably, a flow control valve is arranged at the position where the upper joint is communicated with the sealing cavity of the outer casing; the lower joint is internally provided with an inner pressure gauge, an outer pressure gauge and a communication module.
Due to the adoption of the technical scheme, the application has the following beneficial effects:
(1) According to basic data such as oil reservoir liquid production amount, stratum pressure and the like, the self-adaptive control system gathers and sorts the basic data, and the self-adaptive control system is matched with the underground self-adaptive water distributor to complete an automatic control layered water injection mode, so that balanced water injection is realized;
(2) The ground constant-current and constant-pressure dual-mode control mode is adopted, remote real-time control is completed through the cooperation of a ground controller and an underground self-adaptive water distributor, and the water injection management level is improved;
(3) The underground self-adaptive water distributor integrates flow test control and pressure test in the underground, monitors the layered water injection dynamics in real time, combines the constant pressure and constant flow water injection requirements, self-adapts the layered water injection, and improves the development rationality of fine water injection.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this specification, are incorporated in and constitute a part of this specification and do not limit the application in any way, and in which:
FIG. 1 is a schematic diagram of a downhole adaptive water injection control system;
FIG. 2 is a schematic diagram of a downhole adaptive water injection control device;
FIG. 3 is a schematic diagram of a downhole adaptive water distributor;
FIG. 4 is a schematic diagram of a surface controller coupled to a surface control valve.
In the figure: 101. an oil pipe; 102. setting a packer; 103. an upper self-adaptive water distributor; 104. a lower packer; 105. a lower adaptive water distributor; 106. downhole accessories.
Detailed Description
The present application will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present application are provided for illustration of the application and are not intended to be limiting.
In order to realize the integration of oil reservoirs and processes, fully consider the water injection requirement of the oil reservoirs, achieve the reasonable, scientific and sustainable fine water injection requirement, adopt the self-adaptive water injection control method, refer to factors such as the liquid production of the reservoir, the reasonable pressure level of the stratum and the like, set the separate-layer water injection parameters, combine the real-time water injection quantity and the self-adaptive regulation and control of the water injection pressure, and really realize the fine water injection of the oil reservoirs.
As shown in fig. 1 and 2, the application provides an underground self-adaptive water injection control device, which comprises a self-adaptive control system, a ground controller and an underground self-adaptive water distributor. The self-adaptive control system and the ground controller are arranged on the ground, the underground self-adaptive water distributor is arranged in an underground oil pipe 101, upper and lower packers 102 and 104 and upper and lower underground self-adaptive water distributors 103 and 105 are sequentially arranged in the oil pipe 101 at intervals from top to bottom, and the lower end of the oil pipe 101 is connected with an underground accessory 106. Wherein the ground controller is connected with the packer and the downhole self-adaptive water distributor through the remote communication module, and the ground controller is connected with the ground control valve through a cable, as shown in fig. 4.
The self-adaptive control system mainly comprises an SCADA system, a station control computer and self-adaptive control software, wherein the station control computer is communicated with a ground controller through the SCADA system, and basic data of self-adaptive control is provided for the self-adaptive control software, and the basic data comprise data corresponding to oil well liquid production amount, reservoir pressure and the like. The self-adaptive control software generates corresponding control instructions according to basic data such as liquid production amount and reservoir pressure, and transmits the control instructions to the ground controller through the SCADA system. The ground controller comprises a ground control valve, a ground display and a remote communication module, wherein the ground control valve is used for controlling the water injection quantity of the whole well, realizing the constant pressure and constant flow water injection mode of the whole well, the ground display is used for displaying the ground system parameters, the water injection quantity of the whole well, the flow pressure, the water injection pressure, the opening of the control valve, the water injection pipe column structure, the underground layered flow, the layered pressure, the layered accumulated flow and other water injection dynamic parameters, and the remote communication module is used for establishing communication with a station control computer and a downhole self-adaptive water distributor, so as to realize control instruction and data transmission. The underground self-adaptive water distributor comprises an underground flow test structure, a flow regulation structure, a pressure test structure and a control module, and the formation pressure is tested to automatically control the layered flow according to the data such as the liquid production amount and the reservoir pressure, so that the automatic control of layered water injection is realized, and the formation is ensured to keep reasonable water injection pressure and reservoir water injection amount.
As shown in fig. 3, the downhole adaptive water distributor comprises an upper joint 1, a sealing ring 2, a control module 3, an outer casing 4, a sealing cavity 5, a battery 6, an outer pressure gauge 7, an inner pressure gauge 8, a flow control valve 9, a control nipple 10, a flow meter 11, a flow passage 12, a communication module 13 and a lower joint 14. The outer casing 4 is provided with a flow passage 12, the outer layer of the flow passage 12 is provided with a sealing cavity 5, and the sealing cavity 5 is internally provided with a control module 3, a battery 6, a control nipple 10 and a flowmeter 11. The sealing ring 2 is arranged at the joint of the upper joint 1, the lower joint 14 and the sealing cavity 5, so that the sealing reliability of the sealing cavity is ensured. The upper joint 1 is provided with a flow control valve 9 at the communication position of the sealing cavity 5 of the outer casing 4; the lower joint 14 is provided with the inner and outer pressure gauges 7, 8 and the communication module 13.
Basic data such as the corresponding oil well liquid production amount, formation pressure and the like are automatically received through the self-adaptive control system, corresponding manual intervention is performed according to production requirements, remote self-adaptive instruction transmission is realized, and the rationality of layered water distribution is improved.
The ground electric control valve can be arranged on the ground or remotely, constant-current water injection or constant-pressure water injection of the underground whole well is realized, and different water injection requirements of different stages are realized.
The communication module can establish communication with the underground self-adaptive water distributor in a cabled mode or a cableless mode, and remote control of the water distributor and underground layered dynamic real-time transmission are realized.
The flow control valve analyzes the instruction sent by the ground controller according to the control module, and the underground internal pressure gauge and the underground external pressure gauge automatically control the layered flow, so that underground constant pressure and constant flow control is realized, and the oil reservoir water injection requirement is met.
The external pressure gauge tests the annular pressure of the oil jacket, and feeds back a flow control instruction according to the reservoir pressure maintenance level requirement, so that the effective control of the water injection mode is realized.
A method for controlling downhole adaptive water injection is specifically described by way of examples.
The following describes the adaptive water injection process using a two-layer separate injection well as an example:
step 1: lower tool completion
And (3) placing the packer, the self-adaptive water distributor and the downhole accessory into the shaft according to the structural design of the oil pipe string, and pressing and setting.
Step 2: layered test injection
Setting initial parameters in the self-adaptive water distributor before the well is closed, automatically opening a water nozzle, recovering the ground water injection flow, performing layered trial injection, and recovering the layered water injection pressure. The self-adaptive control system sends geological injection allocation requirements to a ground controller through the SCADA system, the ground controller starts ground injection, meanwhile, the layered initial injection allocation is sent to the underground self-adaptive water distributor, the underground self-adaptive water distributor automatically adjusts layered test injection, and the layered injection pressure of the reservoir is restored to the normal level before the construction of the separate injection pipe column;
step 3: water injection scheme setting
The self-adaptive control system sets a separate layer water injection scheme according to the oil-water well injection and production balance principle and the production situation of a corresponding injection and production unit of a water injection well, provides data comprising the liquid production amount and the reservoir pressure of the corresponding oil well, generates corresponding control instructions, and transmits the control instructions to the underground self-adaptive water distributor 103 through a ground controller by the SCADA system so as to set a separate layer water injection mode;
the device mainly comprises a layered constant pressure water injection mode and a layered constant flow water injection mode. The separated layer constant pressure water injection mode fully considers the reasonable water injection pressure of the stratum and the pressure maintenance level of the oil reservoir, and ensures uniform water flooding in the oil reservoir. The separate-layer constant-flow water injection needs to fully consider the extraction condition of the injection unit, and the separate-layer reasonable water injection quantity is formulated to automatically control the underground separate-layer flow.
Step 4: start intelligent control function
According to the setting condition of the water injection scheme, the ground display displays the water injection dynamic parameters of the ground including the whole well water injection quantity, the flow pressure, the water injection pressure, the opening of the control valve, the water injection pipe column structure, the underground layered flow, the layered pressure and the layered accumulated flow, and the underground self-adaptive water distributor automatically controls the layered flow according to the liquid production quantity and the reservoir pressure data and tests the stratum pressure, thereby realizing the automatic control of the layered water injection.
The control processes of the upper layer and the lower layer can be interchanged, and the layer with good physical properties and strong water absorption capacity of the reservoir layer is usually measured and adjusted first.
The layered water injection mode comprises a layered constant pressure water injection mode and a layered constant flow water injection mode.
The layered constant pressure water injection mode is to test the water injection pressure of the flow control valve by the self-adaptive water distributor through the external pressure gauge according to the water injection pressure instruction sent by the self-adaptive control system, then send the test result to the control nipple, compare the test pressure value of the control nipple with the water injection pressure instruction sent by the self-adaptive control system, if the difference is less than 5%, then keep the original water injection state to inject water; if the difference is more than 5%, the flow control valve is automatically regulated, the water injection pressure is controlled after the valve is opened by regulating the control valve, and when the water injection pressure reaches 5%, the automatic control action is stopped, and the whole regulating process is automatically executed without manual intervention. The mode is applied to reservoirs with long injection well spacing, ambiguous corresponding relation and poor reservoir permeability and connectivity, and uniform water flooding in the reservoir is ensured by controlling reasonable water injection pressure of the stratum and reservoir pressure maintenance level.
The layered constant flow water injection mode is to test the water flow of a flow control valve by a self-adaptive water distributor through a flowmeter according to a water injection flow instruction sent by the self-adaptive control system, then send a test result to a control nipple, compare the test flow value of the control nipple with the water injection flow instruction sent by the self-adaptive control system, and if the difference is less than 20%, keep the original water injection state for water injection; if the difference is more than 20%, the flow control valve is automatically regulated, the flow is controlled by regulating the opening of the control valve, and when the flow reaches 20%, the automatic control action is stopped, and the whole regulation process is automatically executed without manual intervention. The mode is suitable for reservoirs with obvious oil-water well correspondence, high reservoir permeability and connectivity and obvious water injection effect, fully considers the production condition of an injection unit if fully considering the layered constant-flow water injection, and establishes a layered reasonable water injection amount to automatically control the underground layered flow.
The water injection pressure set by the layered constant pressure water injection mode is established by comparing the stratum pressure and the stratum pressure maintaining level in the layered pressure drop test data with the block development design level.
In the region with better reservoir physical properties, the water injection pressure is designed to be 0.9 times of the formation pressure under the condition of considering the injection ratio, namely, the water injection pressure=0.9×the formation pressure; in the area with poor reservoir physical properties, under the condition of considering the injection ratio, the water injection pressure is designed to be 1.05 times of the formation pressure, namely the water injection pressure=1.05×the formation pressure, but the water injection pressure is not higher than the fracture pressure, the injection ratio is generally 1, the water injection effect of partial area is not obvious, and the injection ratio is generally 1.1-1.5.
The application is not limited to the above embodiments, and based on the technical solution disclosed in the application, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the application.
Claims (6)
1. The underground self-adaptive water injection control method is characterized by comprising the following steps of:
step one: lower tool completion
Placing the packer, the self-adaptive water distributor and the downhole accessories in an oil pipe string respectively, putting into a shaft, and pressing and setting;
step two: layered test injection
Setting initial parameters in the self-adaptive water distributor before the well is put into the well, automatically opening a water nozzle, recovering the ground water injection flow, sending geological injection allocation requirements to a ground controller by the self-adaptive control system through an SCADA (supervisory control and data acquisition) system, starting ground water injection by the ground controller, sending layered initial injection allocation quantity to the underground self-adaptive water distributor, automatically adjusting layered test injection by the underground self-adaptive water distributor, and recovering the layered water injection pressure of a reservoir to a normal level before the construction of a separated injection pipe column;
step three: separate layer water injection mode
The self-adaptive control system provides data comprising the liquid production amount and the reservoir pressure of the corresponding oil well according to the oil-water well injection and production balance principle, generates corresponding control instructions, and transmits the control instructions to the underground self-adaptive water distributor through the ground controller by the SCADA system so as to set a separate-layer water injection mode;
the self-adaptive water distributor tests the water injection pressure after the flow control valve through the external pressure gauge according to the water injection pressure instruction sent by the self-adaptive control system, then sends the test result to the control nipple, and the control nipple test pressure value is compared with the water injection pressure instruction sent by the self-adaptive control system, if the difference is less than 5%, the original water injection state is maintained; if the difference is more than 5%, automatically adjusting the flow control valve, controlling the water injection pressure after the valve by adjusting the opening of the control valve, and stopping the automatic control action when the water injection pressure reaches 5%, wherein the whole adjustment process is automatically executed without manual intervention;
the water injection pressure set by the layered constant pressure water injection mode is obtained by comparing the stratum pressure and the stratum pressure maintaining level in the layered pressure drop test data with the block development design level, and formulating the water injection pressure;
in a region with good reservoir physical properties, under the condition of considering the injection ratio, the water injection pressure is designed to be 0.9 times of the stratum pressure; in the area with poor reservoir physical properties, under the condition of considering the injection ratio, the design water injection pressure is 1.05 times of the stratum pressure;
the self-adaptive water distributor tests the water flow of the flow control valve through the flowmeter according to the water flow instruction sent by the self-adaptive control system, then sends the test result to the control nipple, and the control nipple tests the flow value to compare with the water flow instruction sent by the self-adaptive control system, if the difference is less than 20%, the original water injection state is maintained; if the difference is more than 20%, automatically adjusting the flow control valve, and controlling the flow by adjusting the opening of the control valve, and stopping the automatic control action when the flow reaches 20%, wherein the whole adjustment process is automatically executed without manual intervention;
step four: start-up intelligent control
The ground display displays water injection dynamic parameters including the whole well water injection quantity, flow pressure, water injection pressure, control valve opening, water injection pipe column structure, underground layered flow, layered pressure and layered accumulated flow, and the underground self-adaptive water distributor automatically controls the layered flow according to the liquid production quantity and the reservoir pressure data, and the formation pressure is tested, so that the automatic control of the layered water injection is realized.
2. The downhole adaptive waterflooding control method of claim 1, wherein the ratio is between 1.1 and 1.5.
3. A downhole adaptive water injection control device for use in a method according to any one of claims 1-2, comprising an adaptive control system, a surface controller and a downhole adaptive water distributor; the self-adaptive control system and the ground controller are arranged on the ground, and the underground self-adaptive water distributor is arranged in an underground oil pipe; the packer and the underground self-adaptive water distributor are sequentially arranged in the oil pipe at intervals from top to bottom, and the lower end of the oil pipe is connected with an underground accessory; the ground controller is connected with the packer and the underground self-adaptive water distributor through the remote communication module, and is connected with the ground control valve through a cable.
4. A downhole adaptive water injection control device according to claim 3, wherein the downhole adaptive water distributor comprises an upper sub, an outer casing and a lower sub; the outer casing is internally provided with a flow passage, the outer layer of the flow passage is provided with a sealing cavity, and a control module, a battery, a control nipple and a flowmeter are arranged in the sealing cavity.
5. The downhole adaptive water injection control device of claim 4, wherein sealing rings are provided between the upper and lower fittings and the outer casing.
6. The downhole adaptive water injection control device of claim 4, wherein the upper joint is provided with a flow control valve at a position where the upper joint is communicated with the outer casing sealing cavity; the lower joint is internally provided with an inner pressure gauge, an outer pressure gauge and a communication module.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2211311C2 (en) * | 2001-01-15 | 2003-08-27 | ООО Научно-исследовательский институт "СибГеоТех" | Method of simultaneous-separate development of several productive formations and well unit for method embodiment |
| CN103362486A (en) * | 2012-04-05 | 2013-10-23 | 中国石油天然气股份有限公司 | Digital underground layering water injection testing and adjusting process pipe column and operation method thereof |
| CN108121369A (en) * | 2017-12-20 | 2018-06-05 | 中国石油天然气股份有限公司 | A kind of Intelligent water injection remote control apparatus and method |
| CN207676223U (en) * | 2017-12-20 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of Intelligent water injection remote control apparatus |
| CN108374654A (en) * | 2018-03-27 | 2018-08-07 | 中国石油天然气股份有限公司 | A kind of high-pressure well intelligent watering device and process |
| CN108678716A (en) * | 2018-05-22 | 2018-10-19 | 中国石油天然气股份有限公司 | A kind of multiple tube seperated layer water injection intelligence control system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10344584B2 (en) * | 2016-02-12 | 2019-07-09 | Saudi Arabian Oil Company | Systems and methods for transient-pressure testing of water injection wells to determine reservoir damages |
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2018
- 2018-12-26 CN CN201811603371.3A patent/CN109538179B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2211311C2 (en) * | 2001-01-15 | 2003-08-27 | ООО Научно-исследовательский институт "СибГеоТех" | Method of simultaneous-separate development of several productive formations and well unit for method embodiment |
| CN103362486A (en) * | 2012-04-05 | 2013-10-23 | 中国石油天然气股份有限公司 | Digital underground layering water injection testing and adjusting process pipe column and operation method thereof |
| CN108121369A (en) * | 2017-12-20 | 2018-06-05 | 中国石油天然气股份有限公司 | A kind of Intelligent water injection remote control apparatus and method |
| CN207676223U (en) * | 2017-12-20 | 2018-07-31 | 中国石油天然气股份有限公司 | A kind of Intelligent water injection remote control apparatus |
| CN108374654A (en) * | 2018-03-27 | 2018-08-07 | 中国石油天然气股份有限公司 | A kind of high-pressure well intelligent watering device and process |
| CN108678716A (en) * | 2018-05-22 | 2018-10-19 | 中国石油天然气股份有限公司 | A kind of multiple tube seperated layer water injection intelligence control system and method |
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