CN110984926B - Intelligent control layered oil extraction well completion pipe string system and control method thereof - Google Patents
Intelligent control layered oil extraction well completion pipe string system and control method thereof Download PDFInfo
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- CN110984926B CN110984926B CN201911345797.8A CN201911345797A CN110984926B CN 110984926 B CN110984926 B CN 110984926B CN 201911345797 A CN201911345797 A CN 201911345797A CN 110984926 B CN110984926 B CN 110984926B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000000605 extraction Methods 0.000 title claims description 15
- 239000003129 oil well Substances 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 65
- 239000007788 liquid Substances 0.000 claims description 41
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000004873 anchoring Methods 0.000 claims description 27
- 230000009471 action Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 239000002356 single layer Substances 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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
- E21B43/14—Obtaining from a multiple-zone well
-
- 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
-
- 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
-
- 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
-
- 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 completion pipe column system, wherein an internal oil pipe is anchored and seated 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 expansion seals which are respectively positioned at intervals of the oil layer without perforation well sections; 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; the electric control oil pipe anchor, the electric control flow control device and the electric control expansion sealer are internally provided with a power and monitoring system, and a control cable of the power and monitoring system is connected with a ground oil well digital transmission control system along the pipe column. The system adopts a digital technology to process and control electromechanical integrated information, solves the problem that the layered oil production pipe is broken due to fatigue caused by free vibration of the oil pipe, monitors the stress state of the pipe, ensures the sealing performance between layers by pressurizing and setting the expansion sealer at any time, and achieves the aim of finding and plugging water for production and oil production by multi-layer section combination of a single well.
Description
Technical Field
The invention relates to an intelligent control layered oil extraction completion pipe string and a control method thereof, which realize the digital and intelligent layered oil extraction of an oil well and belong to the field of oil extraction engineering.
Background
Along with the development progress of the oil field, how to maintain the single well yield of the oil well, improve the exploitation effect and the recovery ratio is always the subject of the research and the experiment of the oil field. At present, the water content of the oil well with more than 90 percent exceeds 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 layer, the reliability of the water finding and plugging process pipe column is not ideal, and the technical problem of oil field development is solved.
The existing oil well layered oil extraction process pipe column mode mainly adopts two modes of cable-free control and cable-free control, and the cable-free control mode is a downhole pressure-controlled switch system controlled by ground pressure, so that the problems that the horizon switch is inaccurate, the battery power supply effective period is short, and collected downhole pressure, temperature and other data cannot be uploaded to the ground in time exist; the cable control mode is the development direction of the oil well layered oil extraction technology in the future, and the cable control mode controls the underground sub-control switch through a cable, and the underground sub-control switch is regulated and controlled through the underground cable butt joint. However, due to the influence of factors such as oil gas and water in a shaft, bottom pressure and the like and the up-down stroke of an oil pump lifting system, the layered oil production pipe column generates free vibration of oil pipes, so that sealing of an interlayer packer is invalid, layers are communicated, and the layered oil production exploitation effect is seriously influenced.
Disclosure of Invention
The invention aims to solve the technical problems of providing an intelligent control layered oil extraction 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 expansion sealer and a flow control device, establishes a bidirectional transmission, intelligent control and data acquisition system for connecting the ground and the underground well completion tool, solves the problem of fatigue fracture of the layered oil extraction pipe string caused by free vibration of the oil pipe, monitors the stress state of the pipe string, ensures the sealing performance between layers by pressurizing and setting the expansion sealer at any time, and realizes the aim of finding and plugging water extraction by remotely regulating the underground flow control device through multi-layer section combination of a single well.
In order to solve the problems, the technical scheme of the invention is as follows: an intelligent control layered oil production completion pipe string system is characterized in that an internal oil pipe is anchored and seated 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 expansion seals which are respectively positioned at intervals of the oil layer without perforation well sections; 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; the electric control oil pipe anchor, the electric control flow control device and the electric control expansion sealer are internally provided with a power and monitoring system, and a control cable of the power and monitoring system is connected with a ground oil well digital transmission control system along the pipe column upwards; 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-shaped anchor and a setting mechanism are sequentially connected to the central pipe, an anchor electromechanical control system is arranged in the central pipe, the front end of a main shaft of the anchor electromechanical control system is connected with the setting mechanism through an anchor piston, the front end of the setting mechanism is connected with the ball-shaped anchor, a spherical annular slip with anchor teeth is arranged on the ball-shaped anchor, and the rotation action of the anchor electromechanical control system enables the ball-shaped anchor to rotate through the setting mechanism so as to realize anchoring and unbinding actions; a deblocking spring is arranged between the tail part of the setting mechanism and the central tube, so that the setting mechanism is reset in the deblocking process; 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 the rigid body assembly; an expansion motor system is arranged in the rigid body assembly, a pump valve system is arranged at the front end of the expansion 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 concrete structure that an inner cavity at the front end of an outer member is coaxially matched with a rotation bearing member in a sealing way, the front end of the rotation bearing member is a cylinder sleeve with an integrated structure, and a filter is arranged at the front end of the cylinder sleeve; the rotary component is internally and coaxially matched with a plunger rod, the front end of the plunger rod is coaxially matched with a plunger piston which is in sealing fit with a cylinder sleeve, the plunger piston and the plunger rod are of an integrated structure, a liquid channel is arranged at the axle center, a single-flow valve A is arranged at the inlet of the liquid channel, and radial small through holes are respectively arranged at the middle part and the tail end of the liquid channel; the small through hole in the middle part is communicated with a cavity between the plunger and the end face of the rotation-bearing member; through holes corresponding to the positions of the through holes are formed in the bearing member and the outer member, a uniflow valve B is arranged in the through holes of the bearing member, a diversion trench is formed in the inner surface of the bearing member, 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 uniflow valve B; the bearing component is provided with a radial liquid outlet hole, an annular groove is arranged at the connection position of the cylinder sleeve and the bearing component, 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 deblocking 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.
A control method for completing well by adopting an intelligent control layered oil extraction well completion pipe string system comprises the following steps:
1) Determining the number of separate production intervals of an oil layer according to oil well data;
2) Assembling intelligent control layered oil extraction completion pipe strings according to the number of the oil reservoir sections;
3) The pipe column is lowered to a preset position, all the electric control flow control devices are closed, the pump truck is pressurized, the pressure is higher than 15MPa, the pressure is stabilized for 5min, and the pressure is released;
4) Detecting a well completion tool which is put into the electric control well;
4.1 The digital transmission control system of the oil well sends out signals to the control system of the anchoring motor and starts, so that the anchoring of the electric control oil pipe anchor (8) is realized, an anchoring pressure monitoring sensor arranged in the electric control oil pipe anchor detects the anchoring loading tonnage, and real-time data are generated to the digital transmission control system of the oil well;
4.2 The digital transmission control system of the oil well is used for sending a signal to the expansion motor system and starting the expansion motor system, an internal expansion pressure sensor of a setting mechanism of the electronic control expansion device is used for detecting the setting tonnage of the sealing element, and real-time data is sent to the digital transmission control system of the oil well;
4.3 The digital transmission control system of the oil well judges the tightness of the sealing element of the electric control expansion sealer by monitoring the numerical value of the internal expansion sealing pressure sensor of the upper and lower sets of electric control flow control devices of each set of electric control expansion sealer;
4.4 The flow control motor of the electric control flow control device is debugged one by one through the oil well digital transmission control system, the flow is controlled through the plunger type switch valve, and the flow value is sent to the oil well digital transmission control system;
5) Collecting downhole uploading parameters of the electric control completion tool in the step 4);
6) Determining a separate mining scheme: the well completion pipe string is generally divided into more than three layers of sections, a certain layer of section is determined to be mined, and the rest layers of sections are closed to carry out single-layer production;
7) Opening an electric control flow control device at the top to establish an oil jacket space circulation channel, wherein the conventional production mode is unchanged;
8) Starting the pumping unit to realize pumping operation;
9) Adjusting production intervals, and synchronizing the steps 6) to 8), so as to finish exploitation of different intervals;
10 During exploitation, the numerical values of the internal expansion seal pressure sensors of the upper and lower groups of electric control flow control devices of each group of electric control expansion seal devices are monitored, the sealing effect of the electric control expansion seal devices is judged, and when the sealing effect is poor, the electric control expansion seal devices are adopted for electric control pressure compensation setting;
11 After the exploitation is finished, the electronic control expansion sealer is required to be unsealed, and all equipment parts are removed.
After the exploitation scheme is determined in the step 6), the control method for setting the electronic control expanding sealer comprises the following steps:
1) Basic conditions of oil well: layering according to the 3-layer section of the oil layer component, configuring a 3-level electric control expansion sealer to seal each layer respectively, and configuring a layering tubular column of the 3-group electric control flow control device corresponding to the 3-layer section oil layer;
2) According to the design of the layered pipe column, a 3-level electric control expansion sealer and 3 groups of electric control flow control devices are connected through oil pipes, and the oil pipes are put into a preset position of a shaft to manufacture a wellhead device;
3) Pressing and setting of a ground pump truck: the ground pipeline is connected with the pressure testing pump and the wellhead device, and the pressure testing pump starts to pump water into the oil pipe; the pressure is transmitted from the check valve B after passing through the liquid channel through the filter of the electric control expansion sealer and the check valve on the plunger rod, the setting piston assembly is pushed to shear the setting pin nail, the packing element is compressed to expand radially, all layers of sections are completely isolated and sealed, and the setting process of the electric control expansion sealer is realized;
3) And determining to mine a certain layer section, and controlling by a ground computer to turn on the corresponding electric control flow control device, and turning off the electric control flow control devices corresponding to the rest layer sections to perform single-layer production.
After the exploitation scheme is determined in the step 11), the control method of the electronic control expansion sealer is that a ground computer controls a motor system of the electronic control expansion sealer to work one by one, the moving stroke of a plunger is L+S, namely, a small through hole at the end part of a plunger rod is communicated with a liquid outlet, the plunger and the small through hole in the middle of the plunger rod are positioned in an annular groove, the plunger is communicated with a sealing section of a cylinder sleeve, the pressure in a setting assembly and a rubber cylinder is communicated with a central pipe through the liquid outlet and is relieved, the setting load is unloaded, the rubber cylinder is elastically restored to the original state, and the electronic control expansion sealer is restored to the original position through a compression spring, so that the deblocking process of the electronic control expansion sealer is completed.
The step 10) adopts an electric control expansion sealer to carry out electric control pressure compensation setting, and comprises the following steps: the ground computer controls the expansion motor system of the electric control expansion sealer to reciprocate for three times, drives the plunger to reciprocate for L distance, namely, the small through hole in the middle of the plunger rod is always communicated with the diversion trench of the bearing component, the liquid at the rear end of the plunger is compressed and is transmitted through the check valve B, and the outflow liquid pushes the setting piston to enable the pressure in the setting cylinder to be increased to 18MPa, so that the electric control expansion sealer is used for pressure compensation setting.
The method for adjusting the production interval in the step 9) comprises the following steps of firstly, detecting the stress of a pipe column: detecting uploading data of 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 stress changes of up and down strokes of an oil pipe, and determining that the stress and vibration frequency of the oil pipe are in a normal range; and then adjusting the mining interval is to debug the flow control motor switch action of the electric control flow control device through the oil well digital transmission control system, close the corresponding interval, debug the flow control motor switch action of the electric control flow control device of the previous interval and start the previous interval.
The obtained positive effects are as follows:
1, the control of layered oil extraction and layered testing is realized after all layers are separated and detected for each layer section at one time, so that the layer adjustment work is easy, and the operation cost is reduced;
2, realizing the direct reading of the temperature and pressure parameters of the oil layer, the vibration frequency of the pipe column and the fluctuation state information of the load on the ground, and grasping the production dynamics of the oil well at any time;
3, realizing the whole-course automatic ground control of setting and deblocking of the electric expansion sealer, and repeatedly setting and deblocking;
4, the problem that the free vibration of the oil pipe of the layered oil production pipe causes fatigue fracture of the layered oil production pipe is solved, and the service life of the whole oil pumping system is prolonged.
Drawings
FIG. 1 is a schematic diagram of a configuration of an intelligent control layered oil recovery completion string system.
Fig. 2 is a schematic structural view of an electrically controlled tubing anchor.
Fig. 3 is a schematic diagram of the action process of the spherical annular slip.
Fig. 4 is a schematic structural view of the electronically controlled expander.
Fig. 5 is a schematic diagram of a specific structure of a pump valve system of the electronically controlled expander.
Detailed Description
As shown in fig. 1, an intelligent control layered oil production completion string system, wherein an internal oil pipe is anchored and seated in a 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 expansion seals 10, and the electric control expansion seals 10 are respectively positioned at intervals of the oil layer without perforation well sections; each electric control expansion sealer 10 is connected with an electric control flow control device 9, and the number of separated intervals of the oil well is the same as that of the electric control expansion sealers 10; the electric control oil pipe anchor 8, the electric control flow control device 9 and the electric control expansion sealer 10 are internally provided with a power and monitoring system, and a control cable 11 of the power and monitoring system is connected with a ground oil well digital transmission control system along a pipe column upwards;
the electric control oil pipe anchor 8 is characterized in that a central pipe is connected between an upper joint 8-1 and a lower joint 8-9, a ball-shaped 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-shaped anchor 8-3, a spherical annular slip with anchor teeth is arranged on the ball-shaped anchor 8-3, and the rotation of the anchor electromechanical control system 8-8 enables the ball-shaped anchor 8-3 to rotate through the setting mechanism 8-4 so as to realize the anchoring and de-anchoring actions; a deblocking spring 8-7 is arranged between the tail part of the setting mechanism 8-4 and the central tube, so that the setting mechanism 8-4 is reset in the process of deblocking; 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 figure 2, the electric control oil pipe anchor 8 is 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, an anchor piston 8-6 connected with the front end of a main shaft of the anchor electromechanical control system 8-8 is connected with the setting mechanism 8-4, the front end of the setting mechanism 8-4 is connected with the ball type anchor 8-3, and the rotation action of the anchor electromechanical control system 8-8 realizes the rotation of the ball type anchor 8-3 through the setting mechanism 8-4 so as to realize the anchoring and de-anchoring actions; a deblocking spring 8-7 is arranged between the tail part of the setting mechanism 8-4 and the central tube, so that the setting mechanism 8-4 is reset in the process of deblocking; stress monitoring sensors 8-2 are respectively arranged on 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, the anchor electromechanical control system 8-8 drives the anchor piston 8-6 to move forwards, the setting mechanism 8-4 is driven to move forwards, the ball-type anchor 8-3 is driven to rotate, the ball-type anchor 8-3 is provided with a spherical annular slip with anchor teeth,
as shown in FIG. 3, the spherical annular slips are tightly attached to and meshed with the inner wall of the casing, and anchor the tubing string, so that the tubing string cannot creep, and the method is a foundation for realizing the intelligent control layered oil production string consisting of a plurality of groups of electric control expansion devices 10 and electric control flow control devices 9.
As shown in fig. 4, the electric control expansion sealer 10 is structured such 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, and a communication pipeline of the pump valve system 10-6 is communicated with the setting assembly 10-4 to realize setting and unsetting of the rubber cylinder 10-3; 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 an inner cavity at the front end of an outer member is coaxially and hermetically matched with a bearing member 105, a cylinder sleeve 103 with an integral structure at the front end of the bearing member 105 is arranged at the front end of the 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 and coaxially matched with the plunger rod 107, the front end of the plunger rod 107 is coaxially matched with the plunger 102 which is in sealing fit with the cylinder sleeve 103, the plunger 102 and the plunger rod 107 are of an integrated structure, a liquid channel is arranged at the axle center, a uniflow valve A104 is arranged at the inlet of the liquid channel, and radial small through holes are respectively arranged at the middle part and the tail end of the liquid channel; the small through hole in the middle part is communicated with a cavity between the plunger 102 and the end face of the rotation-bearing member 105; through holes corresponding to the positions of the through holes 31 are formed in the rotation supporting member 105 and the outer member 12, a single-flow valve B106 is arranged in the through holes of the rotation supporting member 105, a diversion trench is formed in the inner surface of the rotation supporting 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 single-flow valve B106; a radial liquid outlet hole 108 is formed in the bearing member 105, an annular groove is formed in the connecting position of the cylinder sleeve 103 and the 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 hole 108 in the deblocking 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.
A control method for completing well by adopting an intelligent control layered oil extraction well completion pipe string system comprises the following steps:
1) Determining the number of separate production intervals of an oil layer according to oil well data;
2) Assembling intelligent control layered oil extraction completion pipe strings according to the number of the oil reservoir sections;
3) The pipe column is lowered to a preset position, all the electric control flow control devices 9 are closed, a pump truck is pressurized, the pressure is higher than 15MPa, the pressure is stabilized for 5min, and the pressure is released;
4) Detecting a well completion tool which is put into the electric control well;
4.1 The anchoring electromechanical control system 8-8 pushes the anchoring piston 8-6 to ascend, the setting mechanism 8-4 promotes the spherical clamping teeth on the spherical anchor 8-3 to anchor on the inner side of the sleeve pipe to realize the anchoring function of the electric control oil pipe anchor 8, the anchoring pressure monitoring sensor 8-2 arranged in the electric control oil pipe anchor 8 detects the load fluctuation of the up-and-down stroke of the oil pipe, and real-time data are sent to the oil well digital transmission control system;
4.2 The digital transmission control system of the oil well is used for sending a signal to the expansion motor system and starting the expansion motor system, the internal expansion pressure sensor of the setting mechanism of the electronic control expansion device 10 is used for detecting the setting tonnage of the sealing element, and real-time data is sent to the digital transmission control system of the oil well;
4.3 The numerical transmission control system of the oil well judges the tightness of the sealing element of the electric control expansion sealer 10 by monitoring the numerical value of the internal expansion sealing pressure sensor of the upper and lower electric control flow control devices 9 of each electric control expansion sealer 10;
4.4 The flow control motor of the electric control flow control device 9 is debugged one by one through the oil well digital transmission control system, the flow is controlled through a plunger type switch valve, and the flow value is sent to the oil well digital transmission control system;
5) Collecting downhole uploading parameters of the electric control completion tool in the step 4);
6) Determining a separate mining scheme: the well completion pipe string is generally divided into more than three layers of sections, a certain layer of section is determined to be mined, and the rest layers of sections are closed to carry out single-layer production;
7) Opening an electric control flow control device 9 at the top to establish an oil jacket space circulation channel so as to ensure that the conventional production mode is unchanged;
8) The pumping unit 1 is started to realize pumping work;
9) Adjusting the production intervals, and synchronizing the steps 6) to 8), so as to finish the exploitation of different intervals.
Specific example 1: the control method for setting and unsetting of the LH-C33-318 well electric control expander 10 comprises the following steps:
1) Basic conditions of oil well: the oil layer section 2690m-2950m is layered according to the oil layer component 3 layer section, a 3-level electric control expansion sealer (10) is configured to seal each layer respectively, and a 3-level electric control flow control device 9 is configured to correspond to a layered pipe column of the oil layer of the 3 layer section;
2) According to the design of the layered pipe column, the 3-level electric control expansion sealer 10 and the 3-group electric control flow control device 9 are connected through oil pipes, and are put into a preset position of a shaft, so that a wellhead device is manufactured;
3) Pressing and setting of a ground pump truck: the ground pipeline is connected with the pressure testing pump and the wellhead device, and the pressure testing pump starts to pump water into the oil pipe to be boosted to 15MPa; the pressure is transmitted from the check valve B106 after passing through the liquid channel through the filter 101 of the electric control expansion sealer 10 and the check valve 104 on the plunger rod 107, the setting piston assembly 10-4 is pushed to shear the setting pin, the packing element 10-3 is compressed to expand radially, all layers of sections are completely isolated and sealed, and the setting process of the electric control expansion sealer 10 is realized;
4) Determining to mine a certain layer section, and controlling by a ground computer to open the corresponding electric control flow control device 9, and closing the electric control flow control devices 9 corresponding to the rest layer sections to perform single-layer production;
5) The electronic control expanding sealer 10 is used for deblocking: the motor system 10-7 of the electric control expander 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 annular grooves, the plunger 102 is communicated with the sealing section of the cylinder sleeve 103, the internal pressure of 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 decompressed, the setting load is unloaded, the rubber cylinder 10-3 is elastically restored to the original state, and the unlocking process of the electric control expander 10 is completed through the compression spring.
Specific example 2: the electrically controlled setting method of the LH-N22-324 well electric control expander 10 comprises the following steps:
1) Basic conditions of oil well: the oil layer section 1670m-1960m is layered according to the 4 layer sections of the oil layer composition, 4-level electric control expansion packer 10 is configured to seal each layer respectively, and 4 groups of electric control flow control devices 9 are configured to correspond to the layering pipe columns of the oil layer of the 4 layer sections;
2) The well is produced for 8 months, three times of layer adjustment and the liquid yield is 7.5-24.4 m 3 D, 56-99% of water; the numerical value of an expansion sealing pressure sensor arranged in an upper electric control flow control device 9 and a lower electric control flow control device 9 of each electric control expansion sealer 10 is monitored, the poor sealing effect of the electric control expansion sealer of the second layer section and the third layer section is judged, and the ground computer control re-pressurization setting is carried out on the electric control expansion sealer 10;
3) The electric control expansion sealer 10 is used for electric control pressure compensation setting: the ground computer controls the expansion motor system 10-7 of the electric control expansion sealer 10 to reciprocate for three times, drives 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 guide groove of the bearing member 105, liquid at the rear end of the plunger 103 is compressed and is transmitted through the uniflow valve B106, and the outflow liquid pushes the setting piston 7 to enable the pressure in the setting cylinder to rise to 18MPa, so that the electric control expansion sealer 10 is used for pressure compensation setting;
4) The numerical value display of the internal expansion sealing pressure sensors of the upper and lower groups of electric control flow control devices 9 of the electric control expansion sealer 10 is monitored, the pressure value of the second layer section is 7.5MPa, the pressure value of the third layer section is 7.9MPa, and the sealing effect of the electric control expansion sealer 10 is displayed to meet the expected requirement;
specific example 3: tubular column stress detection and layer adjustment control method for LH-N22-324 well
1) Basic conditions of oil well: the oil layer section 1670m-1960m is layered according to the oil layer component 4 layer section, the production of the 44 rod type oil pump is adopted, the stroke is 4.5m, and the stroke frequency is 4 times/min; after 3 months of production, the daily liquid yield of the oil well is 7-9 m 3 D, determining the stress detection and layer adjustment control of the pipe column, wherein the water content is more than 59%;
2) And (3) detecting the stress of the pipe column: the oil well digital transmission control system is used for detecting that the stress monitoring sensor 8-2 is arranged in the upper joint 8-1 of the electric control oil pipe anchor 8 to upload data, detecting the stress change of the up-down stroke of the oil pipe and measuring the free of the oil pipeVibration frequency f 1 =0.56, the fluctuation range of the up-down stroke load is less than 60kN, and the stress and vibration frequency of the oil pipe are in the normal range;
3) Adjusting the layer: the exploitation interval is adjusted by debugging the flow control motor switch action of the fourth-section electric control flow control device 9 through the oil well digital transmission control system, closing the interval, debugging the flow control motor switch action of the third-section electric control flow control device 9, and opening 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. It is therefore intended that the following claims be interpreted as including the 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. An intelligent control layered oil recovery completion pipe string system which is characterized in that: the oil pipe is anchored and sealed 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 expansion sealing devices (10), and the electric control expansion sealing devices (10) are respectively positioned at intervals of the oil layer without perforation well sections; each electric control expansion sealer (10) is connected with an electric control flow control device (9), and the number of intervals separated by the oil well is the same as the number of the electric control expansion sealers (10); the electric control oil pipe anchor (8), the electric control flow control device (9) and the electric control expansion sealer (10) are internally provided with a power and monitoring system, and a control cable (11) of the power and monitoring system is connected with a ground oil well digital transmission control system along the pipe column upwards;
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-shaped 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, 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-shaped anchor (8-3), spherical annular slips with anchor teeth are arranged on the ball-shaped anchor (8-3), the spherical annular slips act and are tightly attached to and meshed with the inner wall of a casing, and an anchoring pipe column is enabled to be incapable of creeping, and the foundation of stably hanging an intelligent control layered oil production pipe column composed of a plurality of groups of electric control expansion sealers (10) and electric control flow control devices (9) is achieved; the rotation action of the anchor electromechanical control system (8-8) enables the ball anchor (8-3) to rotate through the setting mechanism (8-4) so as to realize the anchoring and de-anchoring actions; a deblocking spring (8-7) is arranged between the tail part of the setting mechanism (8-4) and the central tube, so that the setting mechanism (8-4) is reset in the deblocking process; an anchor electromechanical control system (8-8) in the electric control oil pipe anchor (8) is a power system, and an anchor pressure monitoring sensor (8-2) arranged in the electric control oil pipe anchor (8) is a monitoring system;
the electric control expansion sealer (10) is characterized in 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), and a communication pipeline of the pump valve system (10-6) is communicated with the setting assembly (10-4) to realize setting and unsetting of the rubber cylinder (10-3); an expansion seal pressure sensor (10-5) is arranged in the setting assembly;
the concrete structure of the pump valve system (10-6) is that an inner cavity at the front end of an outer member is coaxially matched with a bearing member (105) in a sealing way, the front end of the bearing member (105) is a cylinder sleeve (103) with an integrated structure, and a filter (101) is arranged at the front end of the cylinder sleeve (103); the rotary member (105) is internally and coaxially matched with the plunger rod (107), the front end of the plunger rod (107) is coaxially matched with the plunger (102) which is in sealing fit with the cylinder sleeve (103), the plunger (102) and the plunger rod (107) are of an integrated structure, a liquid channel is arranged at the axle center, a single-flow valve A (104) is arranged at the inlet of the liquid channel, and radial small through holes are respectively arranged at the middle part and the tail end of the liquid channel; the small through hole in the middle part is communicated with a cavity between the plunger (102) and the end face of the rotation-bearing member (105); through holes corresponding to the positions of the through holes (31) are formed in the rotation supporting member (105) and the outer member (12), a uniflow valve B (106) is arranged in the through holes of the rotation supporting member (105), a diversion trench is formed in the inner surface of the rotation supporting 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 uniflow valve B (106); a radial liquid outlet hole (108) is formed in the bearing member (105), an annular groove is formed in the connection position of the cylinder sleeve (103) and the 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 tail end of the liquid channel is communicated with the liquid outlet hole (108) in the deblocking 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.
2. A control method for completing a well using the intelligent control layered oil recovery completion string system of claim 1, comprising the steps of:
1) Determining the number of separate production intervals of an oil layer according to oil well data;
2) Assembling intelligent control layered oil extraction completion pipe strings according to the number of the oil reservoir sections;
3) The pipe column is lowered to a preset position, all the electric control flow control devices (9) are closed, the pump truck is pressurized, the pressure is higher than 15MPa, the pressure is stabilized for 5min, and the pressure is released;
4) Detecting a well completion tool which is put into the electric control well;
4.1 The digital transmission control system of the oil well sends out signals to the control system of the anchoring motor and starts, so that the anchoring of the electric control oil pipe anchor (8) is realized, an anchoring pressure monitoring sensor arranged in the electric control oil pipe anchor (8) detects the anchoring loading tonnage, and real-time data are generated to the digital transmission control system of the oil well;
4.2 The digital transmission control system of the oil well is used for sending a signal to the expansion motor system and starting the expansion motor system, an electric control expansion device (10) is used for detecting the setting tonnage of a sealing element by a built-in expansion pressure sensor of a setting mechanism, and real-time data are sent to the digital transmission control system of the oil well;
4.3 The numerical transmission control system of the oil well judges the tightness of the sealing element of the electric control expansion sealer (10) by monitoring the numerical value of the internal expansion sealing pressure sensor of the upper and lower electric control flow control devices (9) of each electric control expansion sealer (10);
4.4 The flow control motor of the electric control flow control device (9) is debugged one by one through the oil well digital transmission control system to control the flow through the plunger type switch valve, and the flow value is sent to the oil well digital transmission control system;
5) Collecting downhole uploading parameters of the electric control completion tool in the step 4);
6) Determining a separate mining scheme: the well completion pipe string is generally divided into more than three layers of sections, a certain layer of section is determined to be mined, and the rest layers of sections are closed to carry out single-layer production;
7) Opening an electric control flow control device (9) at the top to establish an oil jacket space circulation channel, wherein the conventional production mode is unchanged;
8) Starting the pumping unit (1) to realize pumping operation;
9) Adjusting production intervals, and synchronizing the steps 6) to 8), so as to finish exploitation of different intervals;
10 During exploitation, the numerical values of the internal expansion sealing pressure sensors of the upper and lower groups of the electric control flow control devices (9) of each group of electric control expansion sealing devices (10) are monitored, the sealing effect of the electric control expansion sealing devices is judged, and when the sealing effect is poor, the electric control expansion sealing devices (10) are adopted for electric control pressure compensation setting;
11 After the exploitation is finished, the electronic control expansion sealer (10) needs to be unsealed, and all equipment parts are removed.
3. The method of controlling a well completion of claim 2, wherein: after the exploitation scheme is determined in the step 6), the control method for setting the electronic control expansion sealer (10) comprises the following steps:
1) Basic conditions of oil well: layering according to the 3-layer section of the oil layer component, configuring a 3-level electric control expansion packer (10) to pack each layer respectively, and configuring a 3-group electric control flow control device (9) to correspond to the pipe column of the 3-layer section oil layer;
2) According to the design of the pipe column, a 3-level electric control expansion sealer (10), 3 groups of electric control flow control devices (9) are connected through oil pipes, and are put into a preset position of a shaft, so that a wellhead device is manufactured;
3) Pressing and setting of a ground pump truck: the ground pipeline is connected with the pressure testing pump and the wellhead device, and the pressure testing pump starts to pump water into the oil pipe; the pressure is transmitted from a check valve B (106) through a liquid channel by a check valve A (104) on a filter (101) and a plunger rod (107) of the electric control expansion sealer (10), the setting assembly (10-4) is pushed to shear setting pins, the packing element (10-3) is compressed to expand radially, all layers of sections are completely isolated and sealed, and the setting process of the electric control expansion sealer (10) is realized;
4) And determining to mine a certain layer section, and controlling by a ground computer to open the corresponding electric control flow control device (9), and closing the electric control flow control devices (9) corresponding to the rest layer sections to perform single-layer production.
4. The method of controlling a well completion of claim 2, wherein: after the exploitation scheme is determined in the step 11), the control method of the electronic control expansion sealer (10) is that the expansion motor system (10-7) of the electronic control expansion sealer (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 of the plunger rod (107) are positioned in the 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 pressure in 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 be in the original state, and the electronic control expansion sealer (10) is restored to the original position through the compression spring, and the deblocking process of the electronic control expansion sealer (10) is completed.
5. The method of controlling a well completion of claim 2, wherein: the step 10) adopts an electric control expansion sealer (10) for electric control pressure compensation setting, and comprises the following steps: the ground computer controls the expansion motor system (10-7) of the electric control expansion sealer (10) to reciprocate for three times, drives the reciprocating motion L of the plunger (102) to be long, namely, a small through hole in the middle of the plunger rod (107) is always communicated with a diversion trench of the bearing member (105), liquid at the rear end of the plunger (102) is compressed and is transmitted through the uniflow valve B (106), and the outflow liquid pushes the setting piston (7) to enable the pressure in the setting cylinder to be increased to 18MPa, so that the electric control expansion sealer (10) is subjected to pressure compensation setting.
6. The method of controlling a well completion of claim 2, wherein: the method for adjusting the production interval in the step 9) comprises the following steps of firstly, detecting the stress of a pipe column: detecting 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 stress changes of up and down strokes of an oil pipe, and determining that the stress and vibration frequency of the oil pipe are in a normal range; and then adjusting the mining interval is to debug the flow control motor switch action of the electric control flow control device (9) through the oil well digital transmission control system, close the corresponding interval, debug the flow control motor switch action of the electric control flow control device (9) of the previous interval and start the previous interval.
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| CN116733426B (en) * | 2023-08-11 | 2023-12-15 | 哈尔滨艾拓普科技有限公司 | Oil well intelligent separate production system based on post-pump pressure pulse control and implementation method |
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