CN110984926A - Intelligent control layered oil production well completion pipe string system and control method thereof - Google Patents
Intelligent control layered oil production well completion pipe string system and control method thereof Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 35
- 238000007789 sealing Methods 0.000 claims abstract description 63
- 239000003129 oil well Substances 0.000 claims abstract description 54
- 239000010410 layer Substances 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 41
- 238000004873 anchoring Methods 0.000 claims description 40
- 230000007246 mechanism Effects 0.000 claims description 30
- 230000009471 action Effects 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 238000005065 mining Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 8
- 230000003578 releasing effect Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 239000002356 single layer Substances 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000010365 information processing Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 5
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- 230000004048 modification Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 3
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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
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
Abstract
The invention relates to an intelligent control layered oil production well completion pipe string system.A internal oil pipe is anchored and set in a pipe string through an electric control oil pipe anchor; the lower end of the electric control oil pipe anchor is provided with a plurality of groups of electric control expanding seal devices, and the electric control expanding seal devices are respectively positioned in the interval non-perforated well sections of the oil layer; each electric control expansion sealer is connected with an electric control flow control device, and the number of the intervals separated by the oil well is the same as that of the electric control expansion sealers; and a power and monitoring system is arranged in the electric control oil pipe anchor, the electric control flow control device and the electric control expansion sealer, and a control cable of the power and monitoring system is upwards connected with a ground oil well digital transmission control system along the pipe column. The system adopts the digital technology to perform electromechanical integrated information processing and control functions, solves the problem of fatigue fracture of the layered oil production string caused by free vibration of the oil pipe and monitors the stress state of the string, and the packer is pressurized and set at any time to ensure the interlayer sealing property, thereby realizing the purpose of finding and plugging water for exploitation and oil extraction by multi-layer combination of a single well.
Description
Technical Field
The invention relates to an intelligent control layered oil production well completion pipe string and a control method thereof, which realize digital and intelligent layered oil production of an oil well and belong to the field of oil production engineering.
Background
With the development process of oil fields, how to maintain the single-well yield of oil wells, improve the exploitation effect and improve the recovery ratio is always the subject of phase-competition research and experiments of oil fields. At the present stage, the water content of the oil well with the water content of more than 90 percent is over 90 percent, so that the oil yield is reduced, and the production cost is greatly increased. Because the prior art can not clearly judge the water outlet position, the reliability of the tubular column adopting the water finding and plugging process is not ideal, thereby becoming the technical problem of oil field development.
The existing oil well layered oil extraction process pipe column mode mainly adopts two modes of no-cable control and cable control, and the no-cable control mode is mostly an underground pressure control switch system controlled by ground pressure, so that the problems of inaccurate horizon switch, short battery power supply validity period and incapability of uploading acquired underground pressure, temperature and other data to the ground in time exist; the cabled control mode is the development direction of the layered oil extraction technology of the oil well in future, the cabled control mode controls the underground branch control switch through a wired cable, and the underground branch control switch is regulated and controlled through the underground cable butt joint. However, because of the influence of factors such as oil gas water in a shaft, bottom hole pressure and the like and the up-down stroke of an oil well pump lifting system, the layered oil production string generates free vibration of an oil pipe, the sealing of an interlayer packer fails, the layers are communicated, and the layered oil production effect is seriously influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent control layered oil production completion pipe string and a control method thereof, wherein the method adopts a digital technology to integrate electromechanical integrated information processing and control functions into a well completion tool of an underground oil pipe anchor, an expanding seal device and a flow control device, and establishes a system for bi-directional transmission, intelligent control and data acquisition between a coupling ground surface and the underground well completion tool, so that the problem of fatigue fracture of the layered oil production pipe string caused by free vibration of an oil pipe is solved, the stress state of the pipe string is monitored, the expanding seal device is pressurized and set at any time to ensure the interlayer sealing property, and the aim of finding and plugging water production and oil production of multi-layer section combination of a single well is fulfilled by remotely regulating and controlling the underground flow control device.
In order to solve the above problems, the technical scheme of the invention is as follows: an internal oil pipe is anchored and set in a pipe column through an electric control oil pipe anchor; the lower end of the electric control oil pipe anchor is provided with a plurality of groups of electric control expanding seal devices, and the electric control expanding seal devices are respectively positioned in the interval non-perforated well sections of the oil layer; each electric control expansion sealer is connected with an electric control flow control device, and the number of the intervals separated by the oil well is the same as that of the electric control expansion sealers; a power and monitoring system is arranged in the electric control oil pipe anchor, the electric control flow control device and the electric control expansion sealer, and a control cable of the power and monitoring system is connected with a ground oil well digital transmission control system upwards along the pipe column; the electric control oil pipe anchor is structurally characterized in that a central pipe is connected between an upper joint and a lower joint, a ball type anchor and a setting mechanism are sequentially connected to the central pipe, an anchoring electromechanical control system is arranged in the central pipe, the front end of a main shaft of the anchoring electromechanical control system is connected with the setting mechanism through an anchoring piston, the front end of the setting mechanism is connected with the ball type anchor, a ball annular slip with anchor teeth is arranged on the ball type anchor, and the ball type anchor is rotated through the setting mechanism by the rotation action of the anchoring electromechanical control system to realize the actions of anchoring and releasing anchoring; an unsealing spring is arranged between the tail part of the setting mechanism and the central pipe, so that the setting mechanism is reset in the process of releasing the anchor; an anchoring motor control system in the electric control oil pipe anchor is a power system, and an anchoring pressure monitoring sensor arranged in the electric control oil pipe anchor is a monitoring system.
The electric control expansion sealer is characterized in that a hydraulic centralizer assembly, a rubber cylinder and a setting assembly are sequentially arranged outside a rigid body assembly; an expansion sealing motor system is arranged in the rigid body assembly, a pump valve system is arranged at the front end of the expansion sealing motor system, and a communication pipeline of the pump valve system is communicated with the setting assembly to realize setting and unsetting of the rubber cylinder; an expansion seal pressure sensor is arranged in the setting assembly.
The pump valve system has the specific structure that a rotation bearing component is coaxially and hermetically matched with an inner cavity at the front end of the outer component, the front end of the rotation bearing component is an integrated cylinder sleeve, and a filter is arranged at the front end of the cylinder sleeve; the bearing component is internally coaxially matched with a plunger rod, the front end of the plunger rod is coaxially matched with a plunger which is in sealing fit with a cylinder sleeve, the plunger and the plunger rod are of an integrated structure, a liquid channel is arranged at the axis, a check valve A is arranged at the inlet of the liquid channel, and small radial through holes are respectively arranged at the middle part and the tail end of the liquid channel; the small through hole in the middle is communicated with a cavity between the plunger and the end face of the rotation bearing component; through holes corresponding to the through holes are arranged on the rotation bearing component and the outer component, a check valve B is arranged in the through hole of the rotation bearing component, a diversion trench is arranged on the inner surface of the rotation bearing component, one end of the diversion trench is communicated with the small through hole at the tail end of the liquid channel, and the other end of the diversion trench is communicated with the check valve B; a radial liquid outlet hole is formed in the rotation bearing member, an annular groove is formed in the connecting position of the cylinder sleeve and the rotation bearing member, and the diameter of the annular groove is larger than that of the plunger; when the small through hole at the tail end of the liquid channel is communicated with the liquid outlet hole in the unsealing process and the bottom of the liquid outlet hole is communicated with the through hole, the small through hole in the middle of the plunger rod is positioned in the annular groove.
The control method for completing the well by adopting the intelligent control layered oil production well completion string system comprises the following steps:
1) determining the number of the oil layer separate production intervals according to the oil well data;
2) assembling an intelligent control layered oil production completion string according to the number of the oil reservoir segments;
3) lowering the pipe column to a preset position, closing all the electric control flow control devices, pressurizing by a pump truck, stabilizing the pressure for 5min when the pressure is higher than 15MPa, and discharging the pressure;
4) detecting the running of the electric control well completion tool;
4.1) sending a signal to an anchoring motor control system through an oil well digital transmission control system and starting the anchoring motor control system to realize anchoring of an electric control oil pipe anchor (8), detecting anchoring loading tonnage by an anchoring pressure monitoring sensor arranged in the electric control oil pipe anchor and generating real-time data to the oil well digital transmission control system;
4.2) sending a signal to the expansion sealing motor system through the oil well digital transmission control system and starting the expansion sealing motor system, detecting the setting tonnage of the sealing element by an expansion sealing pressure sensor arranged in the electric control expansion sealing device setting mechanism, and generating real-time data to the oil well digital transmission control system;
4.3) monitoring the numerical values of the built-in expansion seal pressure sensors of the upper and lower groups of electric control flow control devices of each group of electric control expansion seal device, and judging the sealing performance of the sealing elements of the electric control expansion seal device inside and outside by an oil well digital transmission control system;
4.4) debugging the opening and closing actions of a flow control motor of the electric control flow control device one by one through the oil well digital transmission control system, controlling the flow through a plunger type switch valve, and sending the flow numerical value to the oil well digital transmission control system;
5) collecting the underground uploading parameters of the electric control completion tool in the step 4);
6) determining a separate mining scheme: the well completion pipe column is generally divided into more than three sections, a certain section is determined to be exploited, and the other sections are closed to carry out single-layer production;
7) opening an electric control flow control device at the top, establishing an oil jacket space circulation channel, and keeping the conventional production mode unchanged;
8) starting the oil pumping unit to realize oil pumping;
9) adjusting the production intervals, and synchronously carrying out the steps from 6) to 8) to finish the exploitation of different intervals;
10) in the mining process, monitoring numerical values of internal expansion seal pressure sensors of upper and lower groups of electric control flow control devices of each group of electric control expansion seal device, judging the sealing effect of the electric control expansion seal device, and adopting the electric control expansion seal device to perform electric control pressure supplementing setting when the sealing effect is poor;
11) and after the mining is finished, the electric control sealer is required to be unsealed, and all equipment parts are dismantled.
After the mining scheme is determined in the step 6), the control method for setting the electric control packer comprises the following steps:
1) basic conditions of oil wells: layering according to 3 layers of oil layer components, configuring 3-level electric control seal expanding devices to respectively seal each layer, and configuring 3 groups of electric control flow control devices to correspond to the layering pipe columns of the 3-layer oil layer;
2) according to the design of the layered pipe column, 3 levels of electric control expanding seal devices and 3 groups of electric control flow control devices are linked through oil pipes, and are put into a preset position of a shaft to make a wellhead device;
3) pressing and setting by a ground pump truck: the pressure test pump is connected with a wellhead device through a ground pipeline, and the pressure test pump is started to pump water into the oil pipe; the pressure is transmitted from the check valve B after passing through a liquid channel through a filter of the electric control expansion sealer and a check valve on a plunger rod, the setting piston assembly is pushed to cut off the setting pin, the rubber cylinder is compressed to expand radially, each layer section is completely isolated and sealed, and the setting process of the electric control expansion sealer is realized;
3) and determining to mine a certain section, opening the corresponding electric control flow control device under the control of the ground computer, and closing the electric control flow control devices corresponding to the other sections to perform single-layer production.
After the mining scheme is determined in the step 11), the control method for deblocking the electric control sealing expander comprises the steps of controlling a motor system of the electric control sealing expander to work one by one through a ground computer, enabling the moving stroke of a plunger to be L + S, namely enabling a small through hole at the end part of a plunger rod to be communicated with a liquid outlet hole, enabling the small through hole in the middle of the plunger and the small through hole in the middle of the plunger rod to be located in an annular groove, enabling the plunger to be communicated with a sealing section of a cylinder sleeve, enabling the pressure in a setting assembly and the pressure in a rubber cylinder to be communicated with a central pipe through the liquid outlet hole and relieving pressure, unloading a setting load, enabling the rubber cylinder to elastically recover to the original state.
The step 10) adopts an electric control expansion sealer to electrically control pressure supplementing setting, and comprises the following steps: the ground computer controls the three times of reciprocating motion of an expansion sealing motor system of the electric control expansion sealing device to drive the plunger to reciprocate for L distance, namely, a small through hole in the middle of the plunger rod is always communicated with a diversion trench of a rotation bearing member, liquid at the rear end of the plunger is compressed and is transmitted through a check valve B, and the flowing liquid pushes a setting piston to increase the pressure in a setting cylinder to 18MPa, so that the pressure compensation setting of the electric control expansion sealing device is realized.
The method for adjusting the production interval in the step 9) comprises the following steps of firstly detecting the stress of the tubular column: detecting the data uploaded by a stress monitoring sensor arranged in an upper joint of an electric control oil pipe anchor through an oil well digital transmission control system, detecting the stress change of the up-down stroke of an oil pipe, and determining that the stress and the vibration frequency of the oil pipe are in a normal range; and then adjusting the mining layer section, namely debugging the flow control motor switch action of the electric control flow control device through the oil well digital transmission control system, closing the corresponding layer section, debugging the flow control motor switch action of the previous section of electric control flow control device, and opening the previous layer section.
The positive effects are achieved:
1, the control of layered oil extraction and layered testing is realized after all layers of each layer are separated and detected at one time, so that the layered operation is easy, and the operation cost is reduced;
2, the temperature and pressure parameters of an oil layer, the vibration frequency of a pipe column and the load fluctuation state information are directly read on the ground, and the production dynamics of the oil well is mastered at any time;
3, the full-automatic ground control of setting and unsealing of the electric sealing expander is realized, and the setting and the unsealing are repeated;
and 4, the problem that the oil pipe of the layered oil production pipe column is subjected to fatigue fracture due to free vibration of the oil pipe is solved, and the service life of the whole oil pumping system is further prolonged.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent control layered oil production completion string system.
Fig. 2 is a schematic structural diagram of an electrically controlled tubing anchor.
FIG. 3 is a schematic diagram of the operation of the ball and ring slips.
Fig. 4 is a schematic structural diagram of an electrically controlled sealer.
Fig. 5 is a specific structural diagram of a pump valve system of the electric control sealer.
Detailed Description
As shown in fig. 1, the inner oil pipe is anchored and set in the pipe string through an electric control oil pipe anchor 8; the lower end of the electric control oil pipe anchor 8 is provided with a plurality of groups of electric control expanding seal devices 10, and the electric control expanding seal devices 10 are respectively positioned at intervals of the oil layer and the non-perforated well sections; each electric control seal expander 10 is connected with an electric control flow control device 9, and the number of the intervals separated by the oil well is the same as that of the electric control seal expanders 10; a power and monitoring system is arranged in the electric control oil pipe anchor 8, the electric control flow control device 9 and the electric control expansion sealer 10, and a control cable 11 of the power and monitoring system is connected with a ground oil well digital transmission control system upwards along a pipe column;
the electric control oil pipe anchor 8 is structurally characterized in that a central pipe is connected between an upper joint 8-1 and a lower joint 8-9, a ball type anchor 8-3 and a setting mechanism 8-4 are sequentially connected to the central pipe, an anchor electromechanical control system 8-8 is arranged in the central pipe, the front end of a main shaft of the anchor electromechanical control system 8-8 is connected with the setting mechanism 8-4 through an anchor piston 8-6, the front end of the setting mechanism 8-4 is connected with the ball type anchor 8-3, a ball annular slip with anchor teeth is arranged on the ball type anchor 8-3, and the ball type anchor 8-3 is rotated through the setting mechanism 8-4 by the rotation action of the anchor electromechanical control system 8-8, so that the anchoring and the releasing actions are realized; an unsealing spring 8-7 is arranged between the tail part of the setting mechanism 8-4 and the central pipe, so that the setting mechanism 8-4 is reset in the process of releasing the anchor; an anchoring motor control system 8-8 in the electric control oil pipe anchor 8 is a power system, and an anchoring pressure monitoring sensor 8-2 arranged in the electric control oil pipe anchor 8 is a monitoring system.
As shown in fig. 2, the electric control oil pipe anchor 8 has a structure that a central pipe is connected between an upper joint 8-1 and a lower joint 8-9, a ball type anchor 8-3 and a setting mechanism 8-4 are sequentially connected to the central pipe, an anchoring electromechanical control system 8-8 is arranged in the central pipe, an anchoring piston 8-6 connected to the front end of a main shaft of the anchoring electromechanical control system 8-8 is connected to the setting mechanism 8-4, the front end of the setting mechanism 8-4 is connected to the ball type anchor 8-3, and the rotation of the anchoring electromechanical control system 8-8 realizes the rotation of the ball type anchor 8-3 through the setting mechanism 8-4 to realize anchoring and releasing actions; an unsealing spring 8-7 is arranged between the tail part of the setting mechanism 8-4 and the central pipe, so that the setting mechanism 8-4 is reset in the process of releasing the anchor; and stress monitoring sensors 8-2 are respectively arranged in the upper joints 8-1. The electric control oil pipe anchor is started under the control of an external oil well digital transmission control system, an anchoring electromechanical control system 8-8 drives an anchoring piston 8-6 to move forwards, a setting mechanism 8-4 to move forwards, the setting mechanism 8-4 to move forwards to drive a ball type anchor 8-3 to rotate, a ball ring-shaped slip with anchor teeth is arranged on the ball type anchor 8-3,
as shown in figure 3, the action of the spherical annular slips is tightly attached to and meshed with the inner wall of the casing and anchored on the oil string, so that the oil pumping string cannot creep, and the intelligent control layered oil production string is a basis for stably suspending the intelligent control layered oil production string consisting of a plurality of groups of electric control swelling sealers 10 and electric control flow control devices 9.
As shown in fig. 4, the electric control expansion sealer 10 has a structure that a hydraulic centralizer assembly 10-2, a rubber cylinder 10-3 and a setting assembly 10-4 are sequentially arranged outside a rigid body assembly 10-1; an expansion sealing motor system 10-7 is arranged in the rigid body assembly 10-1, a pump valve system 10-6 is arranged at the front end of the expansion sealing motor system 10-7, a communication pipeline of the pump valve system 10-6 is communicated with the setting assembly 10-4, and setting and unsetting of the rubber cylinder 10-3 are realized; an expansion seal pressure sensor 10-5 is arranged in the setting assembly.
As shown in fig. 5, the pump-valve system 10-6 has a specific structure that a rotation bearing member 105 is coaxially and hermetically matched with an inner cavity at the front end of an outer member, the front end of the rotation bearing member 105 is an integral cylinder sleeve 103, and a filter 101 is arranged at the front end of the cylinder sleeve 103; the rotation bearing member 105 is internally coaxially matched with a plunger rod 107, the front end of the plunger rod 107 is coaxially matched with a plunger 102 which is in sealing fit with a cylinder sleeve 103, the plunger 102 and the plunger rod 107 are of an integral structure, a liquid channel is arranged at the axis, a check valve A104 is arranged at the inlet of the liquid channel, and small radial through holes are respectively arranged at the middle part and the tail end of the liquid channel; the small through hole in the middle is communicated with a cavity between the plunger 102 and the end face of the rotation bearing component 105; through holes corresponding to the through holes 31 are arranged on the rotation bearing member 105 and the outer member 12, a check valve B106 is arranged in the through hole of the rotation bearing member 105, a diversion trench is arranged on the inner surface of the rotation bearing member 105, one end of the diversion trench is communicated with a small through hole at the tail end of the liquid channel, and the other end of the diversion trench is communicated with the check valve B106; a radial liquid outlet hole 108 is arranged on the rotation bearing member 105, an annular groove is arranged at the connecting position of the cylinder sleeve 103 and the rotation bearing member 105, and the diameter of the annular groove is larger than that of the plunger 102; when the small through hole at the end of the liquid channel is communicated with the liquid outlet 108 during unsealing and the bottom of the liquid outlet 108 is communicated with the through hole 31, the small through hole at the middle part of the plunger rod 107 is positioned in the annular groove.
The control method for completing the well by adopting the intelligent control layered oil production well completion string system comprises the following steps:
1) determining the number of the oil layer separate production intervals according to the oil well data;
2) assembling an intelligent control layered oil production completion string according to the number of the oil reservoir segments;
3) lowering the pipe column to a preset position, closing all the electric control flow control devices 9, pressurizing by a pump truck, stabilizing the pressure for 5min under the pressure higher than 15MPa, and discharging the pressure;
4) detecting the running of the electric control well completion tool;
4.1) sending a signal to an anchoring motor control system through an oil well digital transmission control system and starting, wherein an anchoring electromechanical control system 8-8 pushes an anchoring piston 8-6 to move upwards, a setting mechanism 8-4 enables spherical clamping teeth on a ball type anchor 8-3 to be anchored on the inner side of a casing pipe to realize the anchoring effect of an electric control oil pipe anchor 8, an anchoring pressure monitoring sensor 8-2 arranged in the electric control oil pipe anchor 8 detects the load fluctuation of the up-down stroke of an oil pipe, and real-time data is generated to the oil well digital transmission control system;
4.2) sending a signal to an expansion sealing motor system through an oil well digital transmission control system and starting the expansion sealing motor system, detecting the setting tonnage of a sealing element by an expansion sealing pressure sensor arranged in a setting mechanism of the electric control expansion sealing device 10, and generating real-time data to the oil well digital transmission control system;
4.3) monitoring the numerical values of built-in expansion seal pressure sensors of upper and lower groups of electric control flow control devices 9 of each group of electric control expansion seal device 10, and judging the sealing performance of sealing elements of the electric control expansion seal device 10 by an oil well digital transmission control system;
4.4) debugging the switching action of the flow control motor of the electric control flow control device 9 one by one through the oil well digital transmission control system, controlling the flow through a plunger type switch valve, and sending the flow numerical value to the oil well digital transmission control system;
5) collecting the underground uploading parameters of the electric control completion tool in the step 4);
6) determining a separate mining scheme: the well completion pipe column is generally divided into more than three sections, a certain section is determined to be exploited, and the other sections are closed to carry out single-layer production;
7) opening an electric control flow control device 9 at the top, and establishing an oil jacket space circulation channel so as to facilitate the conventional production mode to be unchanged;
8) starting the oil pumping unit 1 to realize oil pumping;
9) adjusting the production intervals, and synchronously carrying out steps 6) to 8) to finish the production of different intervals.
Specific example 1: the LH-C33-318 well electric control sealing expansion device 10 sealing and unsealing control method comprises the following steps:
1) basic conditions of oil wells: 2690m-2950m of oil layer, layering according to 3 layers of oil layer components, configuring 3-level electric control seal expanding devices (10) to respectively seal the layers, and configuring 3 groups of electric control flow control devices 9 corresponding to the layering pipe columns of the 3-layer oil layer;
2) according to the design of the layered pipe column, connecting a 3-stage electric control expansion sealer 10 and 3 groups of electric control flow control devices 9 through oil pipes, and putting the pipe into a preset position of a shaft to make a wellhead device;
3) pressing and setting by a ground pump truck: the pressure test pump is connected with a wellhead device through a ground pipeline, and the pressure test pump starts to pump water into the oil pipe and boost the pressure to 15 MPa; the pressure is transmitted from a check valve B106 through a liquid channel through a filter 101 and a check valve 104 on a plunger rod 107 of the electric control seal expander 10, the setting piston assembly 10-4 is pushed to cut off a setting pin, and a rubber cylinder 10-3 is compressed to expand radially, so that each layer section is completely isolated and sealed, and the setting process of the electric control seal expander 10 is realized;
4) determining to mine a certain section, controlling to open the corresponding electronic control flow control device 9 by the ground computer, and closing the electronic control flow control devices 9 corresponding to the other sections to carry out single-layer production;
5) and (3) unsealing the electric control sealing device 10: the motor system 10-7 of the electric control sealing expansion device 10 is controlled to work one by one through a ground computer, the moving stroke of the plunger 102 is L + S, namely, a small through hole at the end part of the plunger rod 107 is communicated with the liquid outlet hole 108, the plunger 102 and the small through hole in the middle part of the plunger rod 107 are positioned in an annular groove, the plunger 102 is communicated with the sealing section of the cylinder sleeve 103, the pressure in the setting assembly 10-4 and the rubber cylinder 10-3 is communicated with the central tube through the liquid outlet hole 108 and is relieved, the setting load is unloaded, the rubber cylinder 10-3 is elastically restored to the original state and returns to the original position through a compression spring, and the unsealing process of the electric control sealing expansion device.
Specific example 2: the electrically controlled setting method of the LH-N22-324 well electrically controlled packer 10 comprises the following steps:
1) basic conditions of oil wells: the oil layer section is 1670m-1960m, the layering is carried out according to the 4-layer section of the oil layer component, 4 levels of electric control swelling sealers 10 are configured to respectively seal the layers, and 4 groups of electric control flow control devices 9 are configured to correspond to the layering pipe columns of the 4-layer section oil layer;
2) the well is produced for 8 months, three times of layer adjustment are carried out, and the liquid production amount is 7.5-24.4 m3(d) 56-99% of water; by monitoring the numerical values of the built-in expansion seal pressure sensors of the upper and lower groups of electric control flow control devices 9 of each group of electric control expansion seal device 10, the deterioration of the sealing effect of the second-layer and third-layer electric control expansion seal devices is judged, and the electric control expansion seal device 10 is determined to be controlled by a ground computer to perform pressure supplementing setting again;
3) the electric control expanding sealer 10 electric control pressure supplementing setting: the ground computer controls the expansion sealing motor system 10-7 of the electric control expansion sealing device 10 to reciprocate for three times to drive the plunger 102 to reciprocate for L distance, namely, a small through hole in the middle of the plunger rod 107 is always communicated with a diversion trench of the rotation bearing member 105, liquid at the rear end of the plunger 103 is compressed and is transmitted through a check valve B106, and the flowing liquid pushes the setting piston 7 to increase the pressure in the setting cylinder to 18MPa, so that the pressure compensation setting of the electric control expansion sealing device 10 is realized;
4) by monitoring the numerical display of the built-in expansion seal pressure sensors of the upper and lower groups of electric control flow control devices 9 of the electric control expansion seal device 10, the pressure value of the second layer section is 7.5MPa, and the pressure value of the third layer section is 7.9MPa, the sealing effect of the electric control expansion seal device 10 is displayed to meet the expected requirement;
specific example 3: pipe column stress detection and layer adjustment control method for LH-N22-324 well
1) The basic conditions of the oil well are that an oil layer section is 1670m-1960m, the oil layer section is layered according to an oil layer component 4 layer section, Ø 44 rod-type oil-well pumps are adopted to produce the oil well, the stroke is 4.5m, the stroke frequency is 4 times/min, and the daily liquid production of the oil well is realized after 3 months of production7～9m3Determining the stress detection and layer adjustment control of the pipe column when the water content is more than 59%;
2) detecting the stress of the pipe column: the digital transmission control system of the oil well detects the data uploaded by a stress monitoring sensor 8-2 arranged in an upper joint 8-1 of an electric control oil pipe anchor 8, detects the stress change of the up-down stroke of the oil pipe, and measures the free vibration frequency f of the oil pipe1=0.56, the fluctuation range of the up-down stroke load is less than 60kN, and the stress and the vibration frequency of the oil pipe are in the normal range;
3) layer adjustment: adjusting the production interval is to debug the flow control motor switch action of the fourth section of the electric control flow control device 9 through the oil well digital transmission control system, close the interval, debug the flow control motor switch action of the third section of the electric control flow control device 9, and open the third interval.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides an intelligent control layering oil recovery completion tubular column system which characterized in that: the inner oil pipe is anchored and set in the pipe column through an electric control oil pipe anchor (8); the lower end of the electric control oil pipe anchor (8) is provided with a plurality of groups of electric control expanding seal devices (10), and the electric control expanding seal devices (10) are respectively positioned in the interval non-perforated well sections of the oil layer; each electric control expansion sealer (10) is connected with an electric control flow control device (9), and the number of the intervals separated by the oil well is the same as that of the electric control expansion sealers (10); a power and monitoring system is arranged in the electric control oil pipe anchor (8), the electric control flow control device (9) and the electric control expansion sealer (10), and a control cable (11) of the power and monitoring system is connected with a ground oil well digital transmission control system upwards along a pipe column;
wherein the electric control oil pipe anchor (8) is structurally characterized in that a central pipe is connected between an upper joint (8-1) and a lower joint (8-9), the ball type anchor (8-3) and the setting mechanism (8-4) are sequentially connected to the central pipe, an anchoring electromechanical control system (8-8) is arranged in the central pipe, the front end of a main shaft of the anchoring electromechanical control system (8-8) is connected with the setting mechanism (8-4) through an anchoring piston (8-6), the front end of the setting mechanism (8-4) is connected with the ball type anchor (8-3), a ball annular slip with anchor teeth is arranged on the ball type anchor (8-3), and the ball type anchor (8-3) is rotated through the setting mechanism (8-4) by the rotation action of the anchoring electromechanical control system (8-8), so that the anchoring and the anchorage releasing actions are realized; an unsealing spring (8-7) is arranged between the tail part of the setting mechanism (8-4) and the central pipe, so that the setting mechanism (8-4) is reset in the process of releasing the anchor; an anchoring motor control system (8-8) in the electric control oil pipe anchor (8) is a power system, and an anchoring pressure monitoring sensor (8-2) arranged in the electric control oil pipe anchor (8) is a monitoring system.
2. The intelligent control zonal production completion string system of claim 1, wherein: the electric control expanding sealer (10) is structurally characterized in that a hydraulic centralizer assembly (10-2), a rubber cylinder (10-3) and a setting sealer assembly (10-4) are sequentially arranged outside a rigid body assembly (10-1); an expansion sealing motor system (10-7) is arranged in the rigid body assembly (10-1), a pump valve system (10-6) is arranged at the front end of the expansion sealing motor system (10-7), a communication pipeline of the pump valve system (10-6) is communicated with the setting assembly (10-4), and setting and unsetting of the rubber cylinder (10-3) are realized; an expansion seal pressure sensor (10-5) is arranged in the setting assembly.
3. The intelligent control zonal production completion string system of claim 2, wherein: the pump valve system (10-6) has the specific structure that a rotation bearing component (105) is coaxially and hermetically matched with an inner cavity at the front end of an outer component, the front end of the rotation bearing component (105) is an integrated cylinder sleeve (103), and the front end of the cylinder sleeve (103) is provided with a filter (101); the rotary member (105) is internally coaxially matched with a plunger rod (107), the front end of the plunger rod (107) is coaxially matched with a plunger (102) which is in sealing fit with a cylinder sleeve (103), the plunger (102) and the plunger rod (107) are of an integrated structure, a liquid channel is arranged at the axis, a check valve A (104) is arranged at the inlet of the liquid channel, and the middle part and the tail end of the liquid channel are respectively provided with a radial small through hole; the small through hole in the middle part is communicated with a cavity between the plunger (102) and the end surface of the rotation bearing component (105); through holes corresponding to the through holes (31) are formed in the rotation bearing member (105) and the outer member (12), a check valve B (106) is arranged in the through holes of the rotation bearing member (105), a diversion trench is formed in the inner surface of the rotation bearing member (105), one end of the diversion trench is communicated with the small through hole at the tail end of the liquid channel, and the other end of the diversion trench is communicated with the check valve B (106); a radial liquid outlet hole (108) is formed in the rotation bearing component (105), an annular groove is formed in the connecting position of the cylinder sleeve (103) and the rotation bearing component (105), and the diameter of the annular groove is larger than that of the plunger (102); when the small through hole at the tail end of the liquid channel is communicated with the liquid outlet hole (108) in the unsealing process and the bottom of the liquid outlet hole (108) is communicated with the through hole (31), the small through hole in the middle of the plunger rod (107) is positioned in the annular groove.
4. The control method for completing the well by adopting the intelligent control layered oil production well completion string system comprises the following steps:
1) determining the number of the oil layer separate production intervals according to the oil well data;
2) assembling an intelligent control layered oil production completion string according to the number of the oil reservoir segments;
3) lowering the pipe column to a preset position, closing all the electric control flow control devices (9), pressurizing by a pump truck, stabilizing the pressure for 5min under the pressure higher than 15MPa, and discharging the pressure;
4) detecting the running of the electric control well completion tool;
4.1) sending a signal to an anchoring motor control system through an oil well digital transmission control system and starting the anchoring motor control system to realize anchoring of an electric control oil pipe anchor (8), detecting anchoring loading tonnage by an anchoring pressure monitoring sensor arranged in the electric control oil pipe anchor (8), and generating real-time data to the oil well digital transmission control system;
4.2) sending a signal to an expansion sealing motor system through an oil well digital transmission control system and starting, wherein an expansion sealing pressure sensor arranged in a setting mechanism of the electric control expansion sealing device (10) detects the setting tonnage of a sealing element and generates real-time data to the oil well digital transmission control system;
4.3) the numerical values of internal expansion seal pressure sensors of the upper and lower groups of electric control flow control devices (9) of each group of electric control expansion seal device (10) are monitored, and the oil well digital transmission control system judges whether the sealing performance of sealing elements of the electric control expansion seal device (10) is verified;
4.4) debugging the opening and closing actions of a flow control motor of the electric control flow control device (9) one by one through the oil well digital transmission control system, controlling the flow through a plunger type switch valve, and sending the flow numerical value to the oil well digital transmission control system;
5) collecting the underground uploading parameters of the electric control completion tool in the step 4);
6) determining a separate mining scheme: the well completion pipe column is generally divided into more than three sections, a certain section is determined to be exploited, and the other sections are closed to carry out single-layer production;
7) opening an electric control flow control device (9) at the top, establishing an oil jacket space circulation channel, and keeping the conventional production mode unchanged;
8) starting the oil pumping unit (1) to realize oil pumping;
9) adjusting the production intervals, and synchronously carrying out the steps from 6) to 8) to finish the exploitation of different intervals;
10) in the mining process, monitoring the numerical values of built-in expansion seal pressure sensors of upper and lower groups of electric control flow control devices (9) of each group of electric control expansion seal device (10), judging the sealing effect of the electric control expansion seal device, and adopting the electric control pressure compensation setting of the electric control expansion seal device (10) when the sealing effect is poor;
11) after mining, the electric control sealing expander (10) needs to be unsealed, and all equipment parts need to be dismantled.
5. The method of controlling a completion of claim 4, wherein: after the mining scheme is determined in the step 6), the control method for setting the electric control sealing expander (10) comprises the following steps:
1) basic conditions of oil wells: layering according to 3 layers of oil layer components, configuring a 3-level electric control sealing device (10) to respectively seal each layer, and configuring 3 groups of electric control flow control devices (9) corresponding to a layering pipe column of the 3-layer oil layer;
2) according to the design of the layered pipe column, a 3-level electric control expansion sealer (10) and 3 groups of electric control flow control devices (9) are linked by oil pipes, and a well head device is manufactured after a preset position of a shaft is set;
3) pressing and setting by a ground pump truck: the pressure test pump is connected with a wellhead device through a ground pipeline, and the pressure test pump is started to pump water into the oil pipe; the pressure is transmitted from a check valve B (106) after passing through a liquid channel through a filter (101) of the electric control seal expander (10) and a check valve (104) on a plunger rod (107), a setting piston assembly (10-4) is pushed to cut off a setting pin, a rubber cylinder (10-3) is compressed to expand radially, all layer sections are completely isolated and sealed, and the setting process of the electric control seal expander (10) is realized;
4) and determining to mine a certain section, opening the corresponding electric control flow control device (9) under the control of the ground computer, and closing the electric control flow control devices (9) corresponding to the other sections to perform single-layer production.
6. The method of controlling a completion of claim 4, wherein: after the mining scheme is determined in the step 11), the control method for unsealing the electric control sealing expander (10) comprises the steps of controlling a motor system (10-7) of the electric control sealing expander (10) to work one by one through a ground computer, enabling the moving stroke of the plunger (102) to be L + S, namely enabling a small through hole at the end part of the plunger rod (107) to be communicated with a liquid outlet hole (108), enabling the small through holes in the middle parts of the plunger (102) and the plunger rod (107) to be located in an annular groove, enabling the plunger (102) to be communicated with a sealing section of a cylinder sleeve (103), enabling the pressure in the setting assembly (10-4) and the pressure in the rubber cylinder (10-3) to be communicated with a central pipe through the liquid outlet hole (108) and be relieved, unloading the setting load, enabling the rubber cylinder (10-3) to be elastically restored, and enabling the rubber cylinder (10-3) to return to the.
7. The method of controlling a completion of claim 4, wherein: the step 10) adopts an electric control expanding sealer (10) to electrically control pressure supplementing setting, and comprises the following steps: the ground computer controls an expansion sealing motor system (10-7) of the electric control expansion sealing device (10) to reciprocate for three times to drive a plunger (102) to reciprocate for an L distance, namely a small through hole in the middle of a plunger rod (107) is communicated with a diversion trench of a rotation bearing member (105), liquid at the rear end of the plunger (103) is compressed and is transmitted through a check valve B (106), and the flowing liquid pushes a setting piston (7) to increase the pressure in a setting cylinder to 18MPa, so that pressure compensation setting of the electric control expansion sealing device (10) is realized.
8. The method of controlling a completion of claim 4, wherein: the method for adjusting the production interval in the step 9) comprises the following steps of firstly detecting the stress of the tubular column: detecting the uploading data of a stress monitoring sensor (8-2) arranged in an upper joint (8-1) of an electric control oil pipe anchor (8) through an oil well digital transmission control system, detecting the stress change of the up-down stroke of an oil pipe, and determining that the stress and the vibration frequency of the oil pipe are in a normal range; and then adjusting the mining interval, namely debugging the flow control motor switch action of the electric control flow control device (9) through the oil well digital transmission control system, closing the corresponding interval, debugging the flow control motor switch action of the previous section of the electric control flow control device (9), and opening the previous interval.
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