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WO2016010960A1 - Régulation d'injection d'eau intelligente - Google Patents

Régulation d'injection d'eau intelligente Download PDF

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Publication number
WO2016010960A1
WO2016010960A1 PCT/US2015/040268 US2015040268W WO2016010960A1 WO 2016010960 A1 WO2016010960 A1 WO 2016010960A1 US 2015040268 W US2015040268 W US 2015040268W WO 2016010960 A1 WO2016010960 A1 WO 2016010960A1
Authority
WO
WIPO (PCT)
Prior art keywords
regulator
water flood
water
recited
flow rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2015/040268
Other languages
English (en)
Inventor
Ian Thor SCHUUR
John Andrew BOOKER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Technology Corp
Schlumberger Holdings Ltd
Prad Research and Development Ltd
Original Assignee
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Technology Corp
Schlumberger Holdings Ltd
Prad Research and Development Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Canada Ltd, Services Petroliers Schlumberger SA, Schlumberger Technology BV, Schlumberger Technology Corp, Schlumberger Holdings Ltd, Prad Research and Development Ltd filed Critical Schlumberger Canada Ltd
Priority to US15/327,067 priority Critical patent/US20170159417A1/en
Publication of WO2016010960A1 publication Critical patent/WO2016010960A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0085—Adaptations of electric power generating means for use in boreholes
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/103—Locating fluid leaks, intrusions or movements using thermal measurements
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/113—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves

Definitions

  • water flooding is used to enhance secondary recovery of hydrocarbons from a given reservoir.
  • water flood regulators are installed in a selective water fluid injection well to regulate the amount of injection water allowed to flow into a reservoir for enhancing the secondary recovery.
  • Each water flood regulator has a regulating mechanism in the form of a mechanical component calibrated to vary the passage area in relation to a desired flow. Once the regulating mechanism is installed, verification that each zone is allowing the desired flow is accomplished by intervention in the well or with costly tracer testing. If the regulating mechanism fails, it can limit the injection flow and curtail production in that zone or it can over inject and damage the reservoir by channeling.
  • Water flood regulators generally maintain the flow rate based on the compression force of a spring and the size of an orifice installed in the regulator.
  • a system and methodology are provided to enable remote monitoring and control of water flood regulators from a surface location, or other remote location, and for at least one zone in a well.
  • an assembly comprising a regulator is deployed and is adjustable to enable regulation of a flow of water into a corresponding water flood injection zone.
  • a control system is operatively coupled with the assembly to enable selective adjustment of the assembly for regulation of the water flow rate without employing intervention operations.
  • the surface controlled intelligent water flood regulator provides real time injection point flow information and enables real time adjustment.
  • Figure 1 is a schematic illustration of an example of a well system comprising a plurality of regulator assemblies which are adjustable to regulate flow of water into corresponding water flood injection zones, according to an embodiment of the disclosure;
  • Figure 2 is a cross-sectional view of an example of a controlled water flood regulator assembly with a power generator, according to an embodiment of the disclosure
  • Figure 3 is a view of an example of a power generator illustrated in two reciprocating positions, according to an embodiment of the disclosure
  • Figure 4 is a schematic illustration of an example of a telemetry system for communicating between a downhole water flood regulator assembly and a surface control, according to an embodiment of the disclosure
  • Figure 5 is a cross-sectional illustration of an example of an intelligent water flood regulator assembly with a submersible thermal sensor and a water flood regulator, according to an embodiment of the disclosure.
  • Figure 6 is an illustration of an example of a submersible thermal sensor assembly, according to an embodiment of the disclosure.
  • the present disclosure generally relates to a methodology and system which facilitate remote monitoring and/or control of intelligent water flood regulator assemblies from a surface location or other remote location for at least one zone in a well.
  • a regulator assembly comprising a regulator is deployed and is adjustable to enable regulation of a flow of fluid, e.g. water, into the corresponding water flood injection zone.
  • a control system is operatively coupled with each regulator assembly to enable selective adjustment of each regulator assembly for regulation of the water flow rate without employing intervention operations.
  • each regulator assembly is a surface controlled intelligent water flood regulator assembly able to provide real time injection point flow information and/or real time adjustment of flow rate with respect to flow into the corresponding well flood injection zone.
  • each surface controlled intelligent water flood regulator assembly provides real time injection point flow information and enables adjustment without employing intervention operations. Changing the flow rate through the regulators in real time dramatically increases the effectiveness of the overall water flood in the field. As a result, adjustment can be made without removing the regulator and without the corresponding work over of the injection well which would otherwise interrupt the flow to the subject zone and/or other zones in the well.
  • Measuring the flow in real time and transmitting the value to the surface also enables verification of the operation of the regulators according to the specifications provided in a flood plan.
  • the construction of the system and individual regulator assemblies also enables retrofitting into existing side pocket mandrels, thus greatly reducing the cost and time to implement the present system in the field.
  • the intelligent water flood regulator assemblies may use power for making flow measurements, for communicating with the surface, and/or for changing the flow rate of the regulators. Additionally, the regulator assemblies may use telemetry to enable communication with the surface, e.g. to enable sending current flow rate data to a reservoir engineer, and for receiving commands from the surface, e.g. receiving commands from the reservoir engineer to change the flow rate into the zone of interest. The regulator assemblies also may be constructed to measure flow through the regulator in real time. The regulator assemblies are further controllable to modify flow through the regulator according to values received from the surface and to constantly maintain this flow until a new command is received from the surface.
  • a well system 20 is illustrated as comprising a tool string 22 deployed in a water flood injection well 24.
  • the well system 20 comprises an intelligent water flood regulation system 26 having at least one water flood regulator assembly 28.
  • a plurality of the regulator assemblies 28 is deployed along tool string 22 which, in turn, is deployed in a wellbore 30.
  • the wellbore 30 may comprise a vertical wellbore and/or a deviated wellbore, e.g. horizontal wellbore.
  • the wellbore 30 extends into a formation having a subterranean reservoir
  • each regulator assembly 28 is associated with a corresponding well zone 34.
  • each corresponding well zone 34 may be a water flood injection zone into which water is injected via the corresponding intelligent water flood regulator assembly 28 to facilitate secondary recovery of hydrocarbons.
  • water injected via each regulator assembly 28 flows out of wellbore 30 and into the corresponding water flood injection zone 34 via perforations 36.
  • the water flood regulator assemblies 28 may be operatively coupled with a control system 38.
  • the control system 38 is a surface control system positioned at a surface location 40 and coupled with the at least one regulator assembly 28 via a suitable telemetry system 42.
  • the telemetry system 42 may be used for transferring data from each regulator assembly 28 to the control system 38.
  • the telemetry system 42 may be used to carry control signals, e.g. command signals, from the control system 38 to each water flood regulator assembly 28 so as to adjust the flow rate of water flooding into the corresponding water flood injection zone 34.
  • Control system 38 may have a variety of configurations for processing data and/or providing command signals to enable remote adjustment of selected regulator assemblies 28 to a desired flow rate.
  • the control system 38 may be a computer-based control system having a processor 44 for processing data in determining appropriate command signals.
  • the control system 38 also may comprise a memory 46 for storing data and for working in cooperation with the processor 44.
  • the intelligent water flood regulator assemblies 28 may be retrofit into a given tool string 22.
  • the tool string 22 may be constructed with one or more side pocket mandrels 48 configured to receive and release corresponding regulator assemblies 28.
  • the side pocket mandrels 48 are positioned at desired locations along the tool string 22 so as to correspond with the appropriate well zones 34 into which water is to be injected.
  • the side pocket mandrels 48 allow corresponding regulator assemblies 28 (or at least portions of the regulator assemblies) to be deployed and retrieved, as desired, with respect to the tool string 22 located in wellbore 30.
  • the regulator assembly 28 comprises a regulator 50 having a housing 52 out of which water is selectively discharged through at least one discharge port 54, e.g. a plurality of discharge ports 54.
  • the water discharged from ports 54 is flooded into the corresponding water flood injection zone 34.
  • the regulator 50 also comprises at least one inflow port 56, e.g. a plurality of inflow ports 56.
  • the water used to flood the water flood injection zone 34 is flowed into regulator 50 through inflow ports 56 and then travels into, for example, a filter assembly 58.
  • the water flows along an interior 60 of a rod/tube 62 which may be part of an electromagnetic flow control system 64.
  • the water flows from tube 62, through a flow rate control mechanism 66 (if mechanism 66 is open), into a transfer tube 68 via ports 70, and out through discharge ports 54.
  • a flow rate control mechanism 66 if mechanism 66 is open
  • the types of components and arrangements of components for directing water through the regulator assembly 28 may vary according to the parameters of a given structure and/or application. In some applications, for example, the water may flow through an orifice before exiting the interior 60 of tube 62.
  • the electromagnetic system 64 may comprise magnets 72, e.g. permanent magnets, mounted along tube 62 for travel within a corresponding coil 74.
  • magnets 72 e.g. permanent magnets
  • application of current to coil 74 in a given direction induces a desired magnetic field which drives magnets 72 and tube 62 inwardly toward mechanism 66 to reduce flow of water through regulator 50.
  • an end 75 of tube 62 may be constructed for sealing engagement with a corresponding seat 76 of mechanism 66 so as to block flow through regulator 50 when desired.
  • a desired magnetic field is induced so as to drive magnets 72 and tube 62 outwardly with respect to corresponding seat 76.
  • the flow of electrical power to coil 74 may be controlled via suitable electronics 78 connected with coil 74 via a conductive
  • the coil 74 may be constructed as a spring 82 (or used in cooperation with a separate spring 82) to bias the tube 62 in a desired direction, e.g. toward or away from seat 76. It should be noted that in other embodiments the flow rate through regulator 50 may be changed by, for example, adjusting the load on spring 82 or by adjusting an orifice size (e.g. adjusting the size of orifice 94 discussed below).
  • the regulator assembly 28 also may be constructed to generate its own power by utilizing a downhole generator 84.
  • the intelligent water flood regulation system 28 may be surface controlled and constructed to generate its own power by converting the motion of mechanical flow regulating components into energy. This energy is then stored in a downhole storage device 86, e.g. a battery or capacitor, and used to enable taking of flow measurements, communicating those measurements to the surface, and/or adjusting the regulator flow rate according to commands received from the surface control system 38 regarding a new target flow value.
  • the regulator assembly 28 may generate power downhole by utilizing the relative movement between tube 62/magnets 72 and coil 74.
  • the magnets 72 will move through the corresponding coil 74 when tube 62 oscillates with respect to seat 76 of flow control mechanism 66 as the regulator assembly 28 adjusts a flow rate.
  • the magnet or magnets 72 may comprise permanent magnets attached to the outside of tube 62 so that power may be generated according to Faraday's law of induction as the tube 62 (and magnets 72) oscillates with respect to coil 74.
  • the power generated is then delivered through communication line 80 and stored in power storage device 86, e.g. a battery or capacitor, for subsequent use.
  • the regulator assembly 28 can be constructed with spring 78 in the form of a nonlinear spring to cause the oscillations during a constant flow situation.
  • Other options for harvesting power include using the vibration of the regulator assembly 28 (or components of regulator assembly 28) for generating electrical power; or using the water flow through regulator 50 to move a mechanical device, e.g. a paddle or micro spinner, coupled with a generator for generation of electrical power.
  • a mechanical device e.g. a paddle or micro spinner
  • FIG. 4 an example of telemetry system 42 is illustrated. This embodiment of telemetry system 42 is constructed to enable
  • signals may be communicated up and down the wellbore 30 via acoustic propagation.
  • An example of such an acoustic telemetry system 42 is the MuZICTM wireless telemetry system available from Schlumberger Corporation.
  • acoustic data signals and command signals may be enabled through a network of repeaters 88.
  • Each of the intelligent water flow regulator assemblies 28 is able to both initiate communications to the surface and transfer those communications along the tubing string 22. For example, data packets of those communications can be repeated sequentially along the tool string 22 via the network of repeaters 88 and/or regulator assemblies 28.
  • the repeaters 88 may be used between regulator assemblies 28 and/or along the distance between the topmost regulator assembly 28 and the surface 40. The repeating capability is used to overcome certain transmission distance limitations that may be associated with acoustic waves.
  • first regulator assembly 28 can be several thousand feet from the surface 40 in some wells, additional repeaters 88 may be installed in such a well to span the distance.
  • Figure 4 illustrates repeaters 88 mounted externally, the repeaters 88 also can be installed with the tool string, e.g. completion, 22 and powered externally from the surface.
  • the repeaters 88 also can be installed internally within an existing tool string 22 and powered similarly to regulator(s) 50. Communication over the substantial distance also can be accomplished by lowering a suitable telemetry device into the well on a cable to communicate with the topmost regulator assembly 28.
  • EM electromagnetic
  • data regarding flow rate through a given regulator 50 and/or data on other flow related characteristics may be obtained downhole via a sensor or sensors 90, as illustrated in Figure 5.
  • the data from the sensor or sensors 90 is transmitted uphole to control system 38 via telemetry system 42.
  • a method for determining flow through a given regulator 50 comprises use of sensor 90 in the form of a thermal flow sensor 92.
  • the thermal flow sensor 92 may be placed at a variety of locations along the flow path of water moving through the regulator 50.
  • the thermal flow sensor may be placed in the tube 62 after an orifice 94 of regulator 50, as illustrated in Figure 5.
  • the size of the orifice 94 works in cooperation with flow control mechanism 66, e.g. via positioning of tube 62, to control the amount of water exiting regulator 50 and flowing into the corresponding water flood injection zone 34.
  • Embodiments utilizing thermal flow sensor 92 may employ knowledge of the density of the fluid, but in water flood applications the fluid is water and the density is normally constant. In the example illustrated, the measurements made by thermal flow sensor 92 are made after the orifice 94 of the regulator 50 and thus the measurements are independent of orifice erosion. Additionally, these types of measurements are fairly simple and can be easily characterized in a flow loop. In some applications, precautions may be taken to reduce the effects of scaling on the thermal flow sensor 92.
  • thermal flow sensor 92 comprises a temperature sensor 96 and a velocity sensor 98 which detect temperature and velocity for determination of, for example, heat removal 100 and ultimately flow rate according to known equations.
  • the temperature and velocity data may be transmitted to control system 38 for processing to determine flow rate.
  • the determination of flow rate also can be achieved by suitable processing at a downhole location, e.g. by data processing on a suitable processor incorporated into electronics 86. It should also be noted that a variety of other types of sensors are available and may be used to determine flow rate along a given flow passage.
  • a command signal may be sent from the surface control system 38 to a selected regulator assembly 28 at a specific position along tool string 22. If a flow rate adjustment is to be made, the command signal requests the appropriate adjustment of flow rate with respect to water passing through the regulator 50.
  • the regulator assembly 28 uses its own stored energy to mechanically adjust the flow control mechanism 66, thus adjusting the amount of flow through orifice 94 located along tube 62. For example, the position of tube 62 may be shifted via the appropriately applied current to coil 74 so as to adjust the position of tube 62 relative to corresponding seat 76 of flow control mechanism 66. Consequently, the amount of flow through that particular orifice 94 and regulator 50 may be controlled from the surface or from another suitable remote location or locations.
  • the flow rate through regulator 50 may be changed by, for example, adjusting the load on spring 82 or by adjusting an orifice size.
  • the intelligent water flood regulator assembly 28 may comprise other mechanisms which are controllable to adjust the flow rate through regulator 50.
  • a given water flood regulator assembly 28 may comprise an electric motor used to shift tube 62.
  • an electric motor or other actuator may be used to directly adjust the size of orifice 94 to change the flow rate through the regulator 50.
  • feedback regarding reaching the requested flow rate may be provided by an integrated sensor or sensors 90 which provide data to control system 38.
  • a flow meter e.g. thermal sensor 92, may be positioned along an interior 60 of tube 62 so as to monitor the flow of fluid, e.g water, passing through regulator 50.
  • other techniques and mechanisms also may be employed for adjusting the flow through each regulator 50.
  • the intelligent, water flood injection system 26 may be constructed in a variety of configurations depending on the parameters of a given water flood application.
  • the water flood injection system 26 may be constructed with a single regulator assembly 28 or multiple regulator assemblies 28 depending on the number of zones to which water flooding treatments may be applied to enhance secondary recovery.
  • the regulator assemblies 28 may be used in many types of applications, including many types of hydrocarbon recovery applications and other applications in which a controlled outflow of water or other fluid is desired.
  • each intelligent water flood regulator assembly 28 may comprise a variety of components arranged in several configurations.
  • actuators may be used to selectively control the flow rate through a given regulator 50.
  • Various downhole power supplies e.g. batteries or capacitors, may be used to provide power for operating the actuator(s) and/or sensor(s) providing data on the flow rate.
  • the control system 38 also may be constructed in a variety of configurations with various types of processors and/or software for processing data from sensor or sensors 90 and for providing control/command signals to the individual intelligent regulator assemblies 28. The various signals may be carried uphole and downhole by several types of suitable telemetry systems.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Flow Control (AREA)
  • Measuring Volume Flow (AREA)
  • General Engineering & Computer Science (AREA)
  • Operations Research (AREA)

Abstract

La présente invention concerne une technique facilitant une surveillance et une commande à distance d'ensembles régulateurs d'injection d'eau depuis un emplacement de surface, ou depuis un autre emplacement distant, et pour au moins une zone d'un puits. Pour chaque zone, un ensemble régulateur comprenant un régulateur est déployé et peut être réglé pour permettre une régulation d'un écoulement d'eau dans une zone d'injection d'eau correspondante. Un système de commande est couplé fonctionnellement avec l'ensemble pour permettre un réglage sélectif de l'ensemble à des fins de régulation du débit d'eau sans avoir recours à des opérations d'intervention. Dans certaines applications, le régulateur d'injection d'eau intelligent commandé en surface fournit des informations d'écoulement de point d'injection en temps réel et permet un réglage en temps réel.
PCT/US2015/040268 2014-07-18 2015-07-14 Régulation d'injection d'eau intelligente Ceased WO2016010960A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/327,067 US20170159417A1 (en) 2014-07-18 2015-07-14 Intelligent water flood regulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462026400P 2014-07-18 2014-07-18
US62/026,400 2014-07-18

Publications (1)

Publication Number Publication Date
WO2016010960A1 true WO2016010960A1 (fr) 2016-01-21

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US (1) US20170159417A1 (fr)
WO (1) WO2016010960A1 (fr)

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CN109025923A (zh) * 2017-06-08 2018-12-18 中国石油天然气股份有限公司 获取注水指示曲线的装置
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CN109763799A (zh) * 2019-03-18 2019-05-17 中国石油化工股份有限公司 一种利用流量波控制分层注水的方法
CN110185422A (zh) * 2019-05-23 2019-08-30 中国海洋石油集团有限公司 一种注水井用新型无缆式数据双向传输装置
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CN109779586A (zh) * 2019-01-07 2019-05-21 中国石油天然气股份有限公司 一种智能分注浮动门限控制分层流量调配方法
CN112211603B (zh) * 2019-07-12 2023-02-10 中国石油天然气股份有限公司 分层注水系统及其控制方法
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CN116696295A (zh) * 2022-02-28 2023-09-05 中国石油化工股份有限公司 一种用于注水井的注水调控系统及方法
CN115110932B (zh) * 2022-08-30 2022-11-08 东营华辰石油装备有限公司 一种油田开采用具有均匀注水功能的井下配注器
CN116733428B (zh) * 2023-08-16 2023-11-14 黑龙江港岛科技有限公司 一种井下智控式集成配注装置
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US20080262735A1 (en) * 2007-04-19 2008-10-23 Baker Hughes Incorporated System and Method for Water Breakthrough Detection and Intervention in a Production Well

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US5186255A (en) * 1991-07-16 1993-02-16 Corey John C Flow monitoring and control system for injection wells
US6112817A (en) * 1997-05-06 2000-09-05 Baker Hughes Incorporated Flow control apparatus and methods
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CN109138948B (zh) * 2018-09-21 2023-11-28 中国石油天然气股份有限公司 一种井下压控式智能配水器及使用方法
CN109763799A (zh) * 2019-03-18 2019-05-17 中国石油化工股份有限公司 一种利用流量波控制分层注水的方法
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CN110984930A (zh) * 2020-01-01 2020-04-10 东北石油大学 一种井下精细分层注水控制装置及其方法
CN110984930B (zh) * 2020-01-01 2021-05-28 东北石油大学 一种井下精细分层注水控制装置及其方法
CN111058807A (zh) * 2020-01-09 2020-04-24 蔡鹏� 用于海上油田的井下电控配水工具
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