CN112343565B - Double-electric-pump oil production process pipe column - Google Patents
Double-electric-pump oil production process pipe column Download PDFInfo
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- CN112343565B CN112343565B CN202011000097.8A CN202011000097A CN112343565B CN 112343565 B CN112343565 B CN 112343565B CN 202011000097 A CN202011000097 A CN 202011000097A CN 112343565 B CN112343565 B CN 112343565B
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
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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
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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
- E21B43/128—Adaptation of pump systems with down-hole electric drives
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The invention relates to a double electric pump oil production process pipe column, which comprises: the system comprises a well casing, a first branch oil outlet pipe, a second branch oil outlet pipe, a first branch production pump, a second branch production pump, a first sealing insertion device, a second sealing insertion device, a cable, an oil pressure detector, a central control module, a component analyzer, a packer and an artificial well bottom. According to the method, the sealing insertion devices are submerged to a preset depth according to different oil field types, a crude oil sample is obtained through pre-oil extraction, the central control module calculates the component ratio score of crude oil, the submergence depth of the two sealing insertion devices is adjusted according to the score, and after the submergence depth is adjusted, the central control module compares the actual altitude H with the altitude standard value H, adjusts the operating power of each sub-extraction pump respectively, develops oil layers reasonably, improves the yield and enhances the extraction effect.
Description
Technical Field
The invention relates to the technical field of oilfield exploitation, in particular to a double-electric-pump oil extraction process pipe column.
Background
With the continuous development of science and technology in China, the oil extraction technology of petroleum engineering in China is further optimized and innovated, so that the oil extraction efficiency of the petroleum engineering is remarkably improved, and the oil extraction process of the petroleum engineering is simpler, the labor intensity of the oil extraction process is effectively reduced, and the management work of the petroleum engineering is simplified to a certain extent by means of the fusion application of various novel devices and novel technologies.
The oil and gas production well generally comprises a plurality of oil reservoirs, the dynamic characteristics of the oil reservoirs are different, and even if the same oil reservoir is the same, the dynamic characteristics of the upper and lower layered sections are not slightly different. The dynamic characteristics refer to the characteristics of the oil layer under production conditions, including static pressure of the oil layer, permeability, pollution coefficient, formation products, productivity and the like. Separate mining and separate injection, separate production increase and separate water plugging are inevitable trends of oil field mining.
At present, the layered oil recovery mainly adopts a hydraulic control sliding sleeve or an electric switch, and an oil layer to be recovered is selected through the sliding sleeve or the electric switch, so that the purpose of the electric pump layered oil recovery is realized. The layered oil production technologies mainly aim at one electric pump, and the oil production layer is selected by adjusting the electric pump and the sliding sleeve, so that the production effect is poor.
Disclosure of Invention
Therefore, the invention provides a double-electric-pump oil extraction process tubular column which is used for solving the problem of poor exploitation effect caused by the fact that the operation parameters of components in the oil extraction tubular column cannot be correspondingly adjusted according to different oil field environments in the prior art.
In order to achieve the above object, the present invention provides a dual electric pump oil production process pipe string, comprising:
a well casing to reinforce the walls of the well to prevent formation collapse and to form a flow path for the oil;
the first branch oil production pipe is arranged inside the well casing and used for conveying crude oil of a first oil production layer;
the first branch production pump is arranged inside the well casing and connected with the first branch oil outlet pipe, and is used for collecting crude oil of a first oil layer;
a first seal insert disposed inside the well casing for transporting crude oil from a first production zone to the well casing;
the second branch oil production pipe is arranged inside the well casing and used for conveying crude oil of a second oil production layer;
the second branch production pump is arranged in the well casing and connected with the second branch oil outlet pipe, and is used for collecting crude oil of a second oil layer;
a second seal insertion device arranged inside the well casing for conveying crude oil of a second oil production layer to the well casing;
the cable is arranged in the well casing and is respectively connected with the first sub-production pump and the second sub-production pump so as to provide power for the sub-production pumps;
an oil pressure detector which is arranged inside the well casing and is respectively connected with the first sealing insertion device and the second sealing insertion device and is used for detecting the oil pressure of the first oil production layer and the second oil production layer;
the central control module is arranged on the ground near the oil production well, is respectively connected with the first sub-production pump, the first sealing insertion device, the second sub-production pump, the second sealing insertion device and the oil pressure detector, and is used for adjusting the working state of each part;
the component analyzer is arranged at the tail end of the oil separation pipe and is used for detecting the collected crude oil;
the packer is arranged inside the well casing and used for packing an oil layer;
the artificial well bottom is arranged inside the well casing and used for blocking the well bottom;
an oil field type matrix AO, a sealing insertion device submergence depth matrix group B0, a crude oil component proportion scoring matrix C0, a pre-oil recovery time matrix group D0 and a pre-oil recovery power matrix group E0 are arranged in the central control module;
regarding the oil field environment matrixes AO and AO (A1, A2, A3 and A4), wherein A1 is a preset first type oil field environment, A2 is a preset second type oil field environment, A3 is a preset third type oil field environment, and A4 is a preset fourth type oil field environment;
for the sealing insertion device submergence depth matrix groups B0, B0(B1, B2, B3, B4), wherein B1 is a preset first environment insertion depth matrix, B2 is a preset second environment insertion depth matrix, B3 is a preset third environment insertion depth matrix, and B4 is a preset fourth environment insertion depth matrix;
for the ith environment insertion depth matrix Bi, Bi (Bi1, Bi2), wherein Bi1 is the preset ith environment first seal insertion device submergence depth, and Bi2 is the preset ith environment second seal insertion device submergence depth;
for the crude oil component ratio scoring matrixes C0, C0(C1, C2, C3, C4), wherein C1 is a first preset crude oil component ratio scoring contrast value, C2 is a second preset crude oil component ratio scoring contrast value, C3 is a third preset crude oil component ratio scoring contrast value, and C4 is a fourth preset crude oil component ratio scoring contrast value;
for the pre-recovery time matrix groups D0, D0(D1, D2, D3, D4), wherein D1 is a pre-set first environment pre-recovery time matrix, D2 is a pre-set second environment pre-recovery time matrix, D3 is a pre-set third environment pre-recovery time matrix, and D4 is a pre-set fourth environment pre-recovery time matrix;
for preset ith environment pre-sampling time matrixes Di and Di (Di1, Di2), Di1 is the first sub-sampling pump pre-sampling time of the ith preset environment, and Di2 is the second sub-sampling pump pre-sampling time of the ith preset environment;
for the pre-oil recovery power matrix groups E0, E0(E1, E2, E3, E4), where E1 is a preset first environment pre-extraction power matrix, E2 is a preset second environment pre-extraction power matrix, E3 is a preset third environment pre-extraction power matrix, and E4 is a preset fourth environment pre-extraction power matrix;
for a preset ith environment pre-sampling power matrix Ei, Ei (Ei1, Ei2), wherein Ei1 is the first sub-sampling pump pre-sampling power of the ith preset environment, and Ei2 is the second sub-sampling pump pre-sampling power of the ith preset environment;
the central control module judges the oil field environment A according to the existing data and compares the judgment result with the AO internal parameters:
when A is a preset ith type oil field environment, i is 1,2,3 and 4, and the central control module selects Bi from the B0 matrix group as the preset submergence depth of the sealing insertion device;
when the second sealing insertion device is submerged to a depth Bi2, pre-oil recovery is carried out, the pre-oil recovery time is set to be Di2, and the pre-oil recovery power of a second partial extraction pump is set to be Ei 2;
the component analyzer is used for detecting and analyzing the mined mixture, counting the crude oil proportion of the mixture as C1, the water proportion as C2 and the natural gas proportion as C3, transmitting the statistical result to the central control module, and calculating the crude oil component proportion score C by the central control module:
wherein alpha is a compensation parameter of the crude oil proportion C1 to the crude oil component proportion score C, beta is a compensation parameter of the water proportion C2 to the crude oil component proportion score C, and gamma is a compensation parameter of the natural gas proportion C3 to the crude oil component proportion score C;
the central control module compares the internal parameters of C and C0:
when C is not equal to Ci, calculating the absolute value K of C-Ci, comparing K with K by the central control module, wherein K is the scoring tolerance range of the crude oil component ratio:
when K is less than or equal to K, the central control module does not adjust the submergence depth of the second sealing insertion device;
when K is larger than K, the central control module adjusts the submergence depth of the second sealing insertion device, and calculates a depth adjustment value:
wherein theta is a depth adjustment value compensation parameter;
when C is larger than Ci, the central control module downwards adjusts the submergence depth of the second sealing and inserting device to Bi2+ b;
when C is less than Ci, the central control module upwards adjusts the submergence depth of the second sealing and inserting device to Bi 2-b;
after the adjustment is finished, repeating the operations until the crude oil component proportion score C meets the requirement; resetting the height of each oil extraction device when the second seal insertion device is adjusted upwards/downwards to the bottom of the packer/artificial well and the crude oil component proportion score C does not meet the requirement;
and after the second sealing and inserting device adjusts the submergence depth to meet the requirement, the first sealing and inserting device is operated until the first sealing and inserting device adjusts the submergence depth to meet the requirement.
Furthermore, the central control module is also provided with an altitude standard value h and an operating power matrix group F0;
for the operating power matrix groups F0, F0(F1, F2, F3, F4), where F1 is a preset first environment operating power matrix, F2 is a preset second environment operating power matrix, F3 is a preset third environment operating power matrix, and F4 is a preset fourth environment operating power matrix;
for an ith environment operating power matrix Fi, Fi (Fi1, Fi2), wherein the Fi1 presets the ith environment first sub-production pump operating power, and the Fi2 presets the ith environment second sub-production pump operating power;
the central control module compares the actual altitude H with an altitude standard value H:
when H ≠ H, calculating an absolute value M of H-H, comparing M with M by the central control module, wherein M is an altitude tolerance range:
when M is less than or equal to M, the central control module does not modify the operating power of the second separate production pump, and the operating power of the second separate production pump is Fi 2;
when M is larger than M, the central control module corrects the operating power of the second separate mining pump, and calculates a power adjustment value:
wherein mu is a power adjustment value compensation parameter;
when H is larger than H, the central control module adjusts the operating power of the second sub-production pump upwards to Fi2+ f;
and when H is less than H, the central control module adjusts the operating power of the second separate production pump downwards to Fi 2-f.
Further, the central control module is provided with a detection period T, an oil pressure change matrix P0 and a power adjustment parameter matrix Q0;
for the oil pressure variation matrix P0, P0(P1, P2, P3, P4), where P1 is a preset first stage oil pressure variation, P2 is a preset second stage oil pressure variation, P3 is a preset third stage oil pressure variation, and P4 is a preset fourth stage oil pressure variation;
for the power adjustment parameter matrix Q0, Q0(Q1, Q2, Q3), wherein Q1 is a preset first adjustment parameter, Q2 is a preset second adjustment parameter, and Q3 is a preset third adjustment parameter;
before oil recovery is formally started, the oil pressure detector detects a first oil production layer oil pressure initial value p1 and a second oil production layer oil pressure initial value p2 and transmits the detection result to the central control module, the central control module stores p1 and p2, and when the storage is completed, the central control module respectively starts the first sub-production pump and the second sub-production pump;
when the collection time passes T, the oil pressure detector detects a first reservoir oil pressure value P1 'and a second reservoir oil pressure value P2' and transmits the detection result to the central control module, the central control module respectively calculates a first reservoir oil pressure difference delta P1 ═ P1-P1 'and a second reservoir oil pressure difference delta P2 ═ P2-P2', and compares the calculated delta pn ═ 1 and 2 with internal parameters of P0:
when delta pn is less than or equal to P1, the central control module does not adjust the operation power of the nth partial mining pump;
when delta pn is more than P1 and less than or equal to P2, the central control module selects Q1 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P2 and less than or equal to P3, the central control module selects Q2 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P3 and less than or equal to P4, the central control module selects Q3 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is larger than P1, the central control module adjusts the operation power of the nth partial production pump to:
Fn’＝Fn*Qj
wherein Fn is the initial operating power of the nth partial mining pump, and j is 1,2 and 3;
and when the acquisition time passes T again, repeating the operation, recalculating the oil layer oil pressure difference delta pn', and adjusting the operation power of the nth partial extraction pump again.
Furthermore, a first water injection string and a second water injection string are arranged outside the dual-electric-pump oil extraction process string, each water injection string is respectively connected with the central control module, and a water injection flow matrix group W0 and a water injection time matrix to are arranged in the central control module;
for a water injection flow matrix group W0, W0(W1, W2), wherein W1 is a first preset water injection flow and W2 is a second preset water injection flow, each of the water injection flow parameters decreases in sequence;
for the water injection time matrix to, t0(t1, t2), where t1 is a first preset water injection time, t2 is a second preset water injection time, and each of the water injection time parameters is sequentially decreased;
when delta pn is larger than P4, the central control module starts an nth water injection string to inject water to an nth oil layer:
the flow of an nth water injection string is adjusted to be W1 by the central control module, when water injection time passes through t1, the oil pressure detector detects an nth oil production layer oil pressure value pn 'and transmits a detection result to the central control module, and the central control module calculates an nth oil production layer oil pressure difference delta P1' ═ P1-P1 'and compares the delta P1' with P4:
when the delta pn 'is more than P4, repeating the operation until the delta pn' is less than or equal to P4;
when the delta pn 'is less than or equal to P4, the central control module adjusts the flow of the nth water injection string to be W2, when the water injection time passes through t2, the oil pressure detector detects the oil pressure value pn' of the nth oil production layer and transmits the detection result to the central control module, and the central control module calculates the oil pressure difference delta P1 ″ -P1-P1 'of the nth oil production layer and compares the delta P1' with the P1:
when the delta pn is more than P1, repeating the operation until the delta pn is less than or equal to P1;
and when the delta pn is less than or equal to P1, the central control module stops the operation of the nth water injection pipe column and adjusts the operation power of the nth partial production pump to Fn.
Furthermore, a water quality detector is arranged inside the water injection pipe column and used for detecting the quality of the injected water, when the water quality is unqualified, the water injection pipe column transmits water quality information to the central control module, and the central control module stops the operation of the water injection pipe column.
Furthermore, the process pipe column is in a closed state in the tripping process, and foreign matters cannot enter the process pipe column when the process pipe column is tripped.
Furthermore, when the process pipe column simultaneously carries out drainage and production on two oil layers, products of the two oil layers can respectively enter the corresponding channels, so that the products of the two oil layers are separated from the oil layers simultaneously and are respectively produced without mutual influence.
Furthermore, the central control module is connected with a display screen to display the working state of each component and the underground environment.
Further, the packer adopts hydraulic packing.
Compared with the prior art, the oil field type matrix AO (A1, A2, A3 and A4), the seal insertion device submergence depth matrix group B0(B1, B2, B3 and B4), the crude oil component proportion scoring matrix C0(C1, C2, C3 and C4), the pre-oil extraction time matrix group D0(D1, D2, D3 and D4) and the pre-oil extraction power matrix group E0(E1, E2, E3 and E4) are arranged in the central control module, the seal insertion devices are submerged to corresponding preset depths according to different oil field types, crude oil component proportion scores are calculated according to crude oil samples obtained in the pre-oil extraction, submergence depths of two seal insertion devices are adjusted according to the scores, reasonable development can be achieved, the oil production of the oil extraction process string is improved, and the production effect of the process string for different oil field environments is improved.
Furthermore, the central control module is also provided with an altitude standard value H and an operating power matrix group F0(F1, F2, F3 and F4), the central control module compares the actual altitude H with the altitude standard value H, and respectively adjusts the operating power of each sub-mining pump, so that oil layers are reasonably developed, the yield is improved, and the mining effect is further enhanced.
Further, the central control module is provided with a detection period T, an oil pressure change matrix P0(P1, P2, P3, P4) and a power adjustment parameter matrix Q0(Q1, Q2, Q3), before oil extraction is formally started, the oil pressure detector detects a first oil production layer oil pressure initial value P1 and a second oil production layer oil pressure initial value P2 and transmits a detection result to the central control module, the central control module stores P1 and P2, and when the storage is completed, the central control module respectively starts the first sub-production pump and the second sub-production pump;
when the collection time passes T, the oil pressure detector detects a first oil production layer oil pressure value P1 'and a second oil production layer oil pressure value P2' and transmits the detection result to the central control module, the central control module respectively calculates a first oil production layer oil pressure difference delta P1 to be P1-P1 'and a second oil production layer oil pressure difference delta P2 to be P2-P2', compares the calculated delta pn to 1 and 2 with the internal parameters of the P0, adjusts the operating power of each sub-production pump through the comparison result, improves the yield, and further improves the extraction effect of the process string for different oil field environments.
Furthermore, a first water injection string and a second water injection string are arranged outside the dual-electric-pump oil production process string, each water injection string is respectively connected with the central control module, a water injection flow matrix group W0(W1, W2) and a water injection time matrix to (t1, t2) are arranged in the central control module, when delta pn is more than P4, the central control module starts the n water injection string to inject water to the n oil layer, the central control module adjusts the flow of the n water injection string to W1, when the water injection time passes through t1, the oil pressure pn detector detects the oil pressure value of the n oil production layer and transmits the detection result to the central control module, the central control module calculates the oil pressure difference delta P1 '═ P1-P1', compares the parameters in the delta P1 'with the P0, the water injection flow and the pn time of the water injection string are adjusted by comparing the water injection result, and the operation of the n branch oil production pump is adjusted until the delta' ≦ P1, and an oil layer is reasonably developed, the yield is improved, and the exploitation effect of the process pipe column for different oil field environments is further improved.
Furthermore, a water quality detector is arranged inside the water injection pipe column and used for detecting the quality of the injected water, when the water quality is unqualified, the water injection pipe column transmits water quality information to the central control module, the central control module stops the operation of the water injection pipe column, the pollution of an oil layer and the corrosion of equipment are reduced through the detection of the water quality, and the exploitation cost of the process pipe column for exploiting crude oil is reduced.
Furthermore, the process pipe column is in a closed state in the tripping process, and foreign matters cannot enter the process pipe column when the process pipe column is tripped, so that equipment in the process pipe column is protected, and the exploitation cost is further reduced.
Furthermore, when the process pipe column is used for simultaneously discharging and extracting two oil layers, products of the two oil layers can respectively enter the corresponding channels, so that the products of the two oil layers can be separated from the oil layers simultaneously and are respectively output without mutual influence, the oil layers are reasonably developed, the yield is improved, and the extraction effect of the process pipe column on different oil field environments is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a dual electric pump oil recovery process string according to the present invention;
FIG. 2 is a schematic diagram of the position relationship between the oil recovery process string and the water injection string according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in conjunction with the following examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a dual electric pump oil production process string according to the present invention. The invention relates to a double-electric-pump oil production process pipe column, which comprises: the system comprises a well casing 1, a first branch oil outlet pipe 21, a second branch oil outlet pipe 22, a first branch production pump 31, a second branch production pump 32, a first sealing and inserting device 41, a second sealing and inserting device 42, a cable 5, an oil pressure detector 6, a central control module 7, a composition analyzer 8, a packer 9 and an artificial well bottom 10.
Wherein, the well casing 1 is used for reinforcing the well wall to prevent the formation from collapsing and form an oil flow channel; the first branch oil production pipe 21 is arranged inside the well casing 1 and is used for conveying crude oil of a first oil production layer; the first separation and production pump 31 is arranged inside the well casing 1 and connected with the first separation and production pipe 21 for collecting crude oil of a first oil layer; the first sealing and inserting device 41 is arranged inside the well casing 1 and is used for conveying crude oil of a first oil production layer to the well casing 1; the second branch oil production pipe 22 is arranged inside the well casing 1 and is used for conveying crude oil of a second oil production layer; the second branch production pump is arranged inside the well casing 1 and connected with the second branch production pipe 22 to collect crude oil of a second oil layer; the second seal insert 42 is arranged inside the well casing 1 for transporting crude oil from a second production zone to the well casing 1; the cable 5 is arranged inside the well casing 1 and is respectively connected with the first separate production pump 31 and the second separate production pump 32 so as to provide power for the separate production pumps; the oil pressure detector 6 is arranged inside the well casing 1 and is respectively connected with the first sealing insertion device 41 and the second sealing insertion device 42 to detect the oil pressure of a first oil production layer and a second oil production layer; the central control module 7 is arranged on the ground near the oil production well, and is respectively connected with the first sub-production pump 31, the first sealing insertion device 41, the second sub-production pump 32, the second sealing insertion device 41 and the oil pressure detector 5 to adjust the working state of each part; a component analyzer 8 disposed at the ends of the first branch oil line 21 and the second branch oil line 22 for detecting the collected crude oil; the packer 9 is arranged inside the well casing 1 and used for sealing off an oil layer; an artificial bottom hole 10 is arranged inside the well casing 1 for plugging the bottom hole.
Fig. 2 is a schematic diagram showing a positional relationship between the oil recovery process string and the water injection string according to the present invention. The water injection string comprises a first water injection string 111, a second water injection string 112 and a water quality detector 12, wherein a water outlet of the first water injection string 111 is positioned in a first oil layer and connected with the central control module 7 to inject water into the first oil layer; the water outlet of the second water injection string 112 is positioned in a second oil layer and connected with the central control module 7, and is used for injecting water to the first oil layer; the water quality detector 12 is positioned at the water collecting opening of the water injection pipe column and is used for detecting the quality of the injected water.
When the double-electric-pump oil extraction process pipe column runs, an oil field type matrix AO, a sealing insertion device submergence depth matrix group B0, a crude oil component proportion scoring matrix group C0, a pre-oil extraction time matrix group D0 and a pre-oil extraction power matrix group E0 are arranged in the central control module 7;
regarding the oil field environment matrixes AO and AO (A1, A2, A3 and A4), wherein A1 is a preset first type oil field environment, A2 is a preset second type oil field environment, A3 is a preset third type oil field environment, and A4 is a preset fourth type oil field environment;
for the sealing insertion device submergence depth matrix groups B0, B0(B1, B2, B3, B4), wherein B1 is a preset first environment insertion depth matrix, B2 is a preset second environment insertion depth matrix, B3 is a preset third environment insertion depth matrix, and B4 is a preset fourth environment insertion depth matrix;
for the ith environment insertion depth matrix Bi, Bi (Bi1, Bi2), where Bi1 is the preset ith environment first seal insertion device 41 submergence depth, and Bi2 is the preset ith environment second seal insertion device 42 submergence depth;
for the crude oil component ratio scoring matrix groups C0, C0(C1, C2, C3, C4), wherein C1 is a first preset crude oil component ratio scoring contrast matrix, C2 is a second preset crude oil component ratio scoring contrast matrix, C3 is a third preset crude oil component ratio scoring contrast matrix, and C4 is a fourth preset crude oil component ratio scoring contrast matrix;
for the ith preset crude oil component ratio score comparison value matrix Ci, i is 1,2,3,4, Ci (Ci1, Ci2), wherein Ci1 is the ith preset crude oil component ratio score comparison value of the first oil layer, and Ci2 is the ith preset crude oil component ratio score comparison value of the second oil layer;
for the pre-recovery time matrix groups D0, D0(D1, D2, D3, D4), wherein D1 is a pre-set first environment pre-recovery time matrix, D2 is a pre-set second environment pre-recovery time matrix, D3 is a pre-set third environment pre-recovery time matrix, and D4 is a pre-set fourth environment pre-recovery time matrix;
presetting an ith environment pre-sampling time matrix Di, Di (Di1, Di2), wherein Di1 is the pre-sampling time of the ith environment first sub-sampling pump 31, and Di2 is the pre-sampling time of the ith environment second sub-sampling pump 32;
for the pre-oil recovery power matrix groups E0, E0(E1, E2, E3, E4), where E1 is a preset first environment pre-extraction power matrix, E2 is a preset second environment pre-extraction power matrix, E3 is a preset third environment pre-extraction power matrix, and E4 is a preset fourth environment pre-extraction power matrix;
for a preset ith environment pre-sampling power matrix Ei, Ei (Ei1, Ei2), wherein Ei1 is the pre-sampling power of the first fractional sampling pump 31 in the ith preset environment, and Ei2 is the pre-sampling power of the second fractional sampling pump 32 in the ith preset environment;
the central control module 7 judges the oil field environment A according to the existing data and compares the judgment result with the AO internal parameters:
when a is a preset ith type of oil field environment, i is 1,2,3,4, the central control module 7 selects a corresponding preset ith environment insertion depth matrix Bi from the B0 matrix group as a preset submergence depth of the sealing insertion device;
when the second seal insertion device 42 is submerged to the depth Bi2, the second separate production pump 32 carries out pre-production, the time length of the pre-production is set to be Di2, and the pre-production power of the second separate production pump 32 is set to be Ei 2;
when the second extraction pump 32 extracts a specified amount of crude oil mixture from the second oil reservoir, the component analyzer 8 performs detection analysis on the extracted mixture, counts the crude oil ratio C1, the water ratio C2 and the natural gas ratio C3 in the mixture and transmits the statistical results to the central control module 7, and the central control module 7 calculates a crude oil component ratio score C according to the statistical results:
wherein alpha is a compensation parameter of the crude oil proportion C1 to the crude oil component proportion score C, beta is a compensation parameter of the water proportion C2 to the crude oil component proportion score C, and gamma is a compensation parameter of the natural gas proportion C3 to the crude oil component proportion score C;
after the calculation is completed, the central control module 7 compares the internal parameters C and C0:
when C ≠ Ci2, the absolute value K of C-Ci2 is calculated, and the central control module 7 compares K with K, wherein K is the ratio score tolerance range of the crude oil components:
when K is less than or equal to K, the central control module 7 does not adjust the submergence depth of the second seal insertion device 42;
when K > K, the central control module 7 calculates a depth adjustment value b to adjust the submergence depth of the second seal insertion device 42:
wherein theta is a depth adjustment value compensation parameter;
when the central control module 7 completes the calculation of the depth adjustment value b, the central control module 7 adjusts Bi by using b according to the size relationship between C and Ci:
when C > Ci2, central control module 7 adjusts the second seal insertion device 42 downward submergence depth to Bi2+ b;
when C < Ci2, central control module 7 adjusts the second seal insertion device 42 submergence depth upwards to Bi 2-b;
after the adjustment is finished, repeating the operations until the crude oil component proportion score C meets the requirement; resetting the height of each oil recovery device when the second seal insertion device 42 is adjusted up/down to the packer 9/artificial well bottom 10 position and the crude oil component ratio score C is not satisfactory;
after the second seal insertion device 42 adjusts the submergence depth to meet the requirement, replacing Bi2 with Bi1, Ci2 with Ci1, and Di2 with Di1 in the above steps, and performing the above operation on the first seal insertion device 41 until the first seal insertion device 41 adjusts the submergence depth to meet the requirement.
Specifically, the central control module 7 is further provided with an altitude standard value h and an operating power matrix set F0;
for the operating power matrix groups F0, F0(F1, F2, F3, F4), where F1 is a preset first environment operating power matrix, F2 is a preset second environment operating power matrix, F3 is a preset third environment operating power matrix, and F4 is a preset fourth environment operating power matrix;
for an ith environment operating power matrix Fi, Fi (Fi1, Fi2), wherein the Fi1 presets the operating power of the ith environment first mining pump 31, and the Fi2 presets the operating power of the ith environment second mining pump 32;
the central control module 7 compares the actual altitude H with the altitude standard value H:
when H ≠ H, calculating an absolute value M of H-H, comparing M with M by the central control module 7, wherein M is an altitude tolerance range:
when M is less than or equal to M, the central control module 7 does not modify the operating power of the second separate production pump 32, and the operating power of the second separate production pump 32 is Fi 2;
when M is larger than M, the central control module 7 corrects the running power of the second separate production pump 32, and calculates a power adjustment value f:
wherein mu is a power adjustment value compensation parameter;
when the calculation is completed, the central control module 7 adjusts the pump operation power according to the magnitude relation between the f value and H and H:
when H is larger than H, the central control module 7 adjusts the operating power of the second separate production pump 32 upwards to Fi2+ f;
and when H is less than H, the central control module 7 adjusts the running power of the second separation and production pump 32 downwards to Fi 2-f.
And after the adjustment of the running power of the second mining pump 32 is finished, replacing Fi2 in the steps with Fi1, and performing the operation on the first mining pump 31 to adjust the running power of the first mining pump 31.
Specifically, the central control module 7 is provided with a detection period T, an oil pressure change matrix P0 and a power adjustment parameter matrix Q0;
for the oil pressure variation matrix P0, P0(P1, P2, P3, P4), where P1 is a preset first stage oil pressure variation, P2 is a preset second stage oil pressure variation, P3 is a preset third stage oil pressure variation, and P4 is a preset fourth stage oil pressure variation;
for the power adjustment parameter matrix Q0, Q0(Q1, Q2, Q3), wherein Q1 is a preset first adjustment parameter, Q2 is a preset second adjustment parameter, and Q3 is a preset third adjustment parameter;
before oil recovery is formally started, the oil pressure detector 6 detects a first oil production layer oil pressure initial value p1 and a second oil production layer oil pressure initial value p2 respectively and transmits the detection results to the central control module 7, and the central control module 7 stores p1 and p2 and starts the first sub-production pump 31 and the second sub-production pump 32 respectively when the storage is completed;
when the acquisition duration reaches T, the oil pressure detector 6 detects a first oil production layer oil pressure value P1 'and a second oil production layer oil pressure value P2' and transmits the detection result to the central control module 7, the central control module 7 respectively calculates a first oil production layer oil pressure difference Δ P1 ═ P1-P1 'and a second oil production layer oil pressure difference Δ P2 ═ P2-P2', and compares the calculated Δ pn with internal parameters of P0, wherein n is 1, 2:
when delta pn is less than or equal to P1, the central control module 7 does not adjust the operation power of the nth partial mining pump;
when delta pn is more than P1 and less than or equal to P2, the central control module 7 selects Q1 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P2 and less than or equal to P3, the central control module 7 selects Q2 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P3 and less than or equal to P4, the central control module 7 selects Q3 from Q0 to adjust the operation power of the nth partial mining pump;
when the central control module 7 selects Qj from Q0 to adjust the operation power of the nth partial production pump, j is 1,2,3, the central control module 7 adjusts the operation power of the nth partial production pump to Fn ', Fn' ═ Fn × Qj, wherein Fn is the initial operation power of the nth partial production pump;
when the central control module 7 finishes adjusting the initial power of the nth mining pump, the central control module 7 records the acquisition time of the nth mining pump again, and when the duration of the acquisition time reaches T, the central control module 7 repeats the operations to recalculate the oil layer oil pressure difference delta pn' and adjusts the operating power of the nth mining pump again.
Specifically, a first water injection string 111 and a second water injection string 112 are arranged outside the dual-electric-pump oil extraction process string, each water injection string is respectively connected with the central control module 7, and a water injection flow matrix W0 and a water injection time matrix to are arranged in the central control module 7;
for the water injection flow matrix W0, W0(W1, W2), where W1 is the first preset water injection flow, W2 is the second preset water injection flow, W1 > W2;
for the water injection time matrix to, t0(t1, t2), where t1 is a first preset water injection time, t2 is a second preset water injection time, and t1 > t 2;
when the oil layer oil pressure difference delta pn of the nth separate production pump is larger than P4, the central control module 7 starts the nth water injection pipe column to inject water into the nth oil layer:
the central control module 7 sets the water injection flow of the nth water injection string to be W1, controls the oil pressure detector 6 to detect the oil pressure value pn ' of the nth oil production layer when the water injection time of the nth water injection string reaches t1, and after the detection is finished, the oil pressure detector 6 transmits the detection result to the central control module 7, the central control module 7 calculates the oil pressure difference Δ P1 ' of the nth oil production layer and compares the Δ P1 ' with P4, and the Δ P1 ' is P1-P1 ':
when the delta pn 'is more than P4, repeating the operation until the delta pn' is less than or equal to P4;
when the delta pn ' is less than or equal to P4, the central control module 7 sets the water injection flow of the nth water injection string to be W2, controls the oil pressure detector 6 to detect the nth oil exploitation layer oil pressure value pn when the water injection time of the nth water injection string reaches t2, the oil pressure detector 6 transmits the detection result to the central control module 7 after the detection is finished, the central control module 7 calculates the nth oil exploitation layer oil pressure difference delta P1 ' and compares the delta P1 ' with the P1, and the delta P1 ' -P1-P1 ':
when the delta pn is more than P1, repeating the operation until the delta pn is less than or equal to P1;
and when the delta pn is less than or equal to P1, the central control module 7 stops the operation of the nth water injection pipe column and adjusts the operation power of the nth partial production pump to Fn.
Specifically, a water quality detector 12 is arranged inside the water injection pipe column and used for detecting the quality of the injected water, when the water quality is unqualified, the water injection pipe column transmits water quality information to the central control module 7, the central control module 7 controls the water injection pipe column to stop running and gives an unqualified water quality alarm, and when a worker finishes purifying water to enable the water quality to reach the standard, the central control module 7 controls the water injection pipe column to inject water into an oil well.
Specifically, each of the seal-inserting apparatuses is in a closed state to seal the inside of the process string, and foreign substances cannot enter the inside of the process string when each of the seal-inserting apparatuses is closed.
Specifically, when the process pipe column simultaneously carries out discharge and production on two oil layers, products of the two oil layers respectively enter the corresponding oil outlet pipe channels so that the process pipe column respectively carries out production on the two oil layers.
Specifically, the central control module 7 is connected with a display screen to display the working state and the underground environment of each part.
In particular, the packer 9 employs hydraulic packing.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A double electric pump oil production process tubular column is characterized by comprising:
a borehole casing to reinforce the borehole wall to prevent formation collapse;
the first branch oil production pipe is arranged inside the well casing and used for conveying crude oil of a first oil production layer;
the first branch production pump is arranged inside the well casing and connected with the first branch oil outlet pipe, and is used for collecting crude oil of a first oil layer;
a first seal insert disposed inside the well casing for transporting crude oil from a first production zone to the well casing;
the second branch oil production pipe is arranged inside the well casing and used for conveying crude oil of a second oil production layer;
the second branch production pump is arranged in the well casing and connected with the second branch oil outlet pipe, and is used for collecting crude oil of a second oil layer;
a second seal insert disposed inside the casing in the well for transporting crude oil from a second production zone to the casing in the well;
the cable is arranged in the well casing and is respectively connected with the first sub-production pump and the second sub-production pump so as to respectively provide power for each sub-production pump;
an oil pressure detector which is arranged inside the well casing and is respectively connected with the first sealing insertion device and the second sealing insertion device and is used for respectively detecting the oil pressure of the first oil production layer and the second oil production layer;
the central control module is arranged on the ground near the oil production well, is respectively connected with the first sub-production pump, the first sealing insertion device, the second sub-production pump, the second sealing insertion device and the oil pressure detector, and is used for adjusting the working state of each part;
the component analyzer is respectively arranged at the tail end of each oil separation pipe and used for detecting the components of the collected crude oil;
the packer is arranged inside the well casing and used for packing an oil layer;
the artificial well bottom is arranged inside the well casing and used for blocking the well bottom;
an oil field environment matrix A0, a sealing insertion device submergence depth matrix group B0, a crude oil component ratio scoring matrix group C0, a pre-oil recovery time matrix group D0 and a pre-oil recovery power matrix group E0 are arranged in the central control module;
for the oilfield environment matrix a0(a1, a2, A3, a4), wherein a1 is a preset first type oilfield environment, a2 is a preset second type oilfield environment, A3 is a preset third type oilfield environment, and a4 is a preset fourth type oilfield environment;
for the seal insertion device, a submergence depth matrix group B0(B1, B2, B3, B4), where B1 is a preset first environment insertion depth matrix, B2 is a preset second environment insertion depth matrix, B3 is a preset third environment insertion depth matrix, and B4 is a preset fourth environment insertion depth matrix;
for the ith environment, inserting a depth matrix Bi (Bi1, Bi2), wherein Bi1 is the submergence depth of the ith environment first sealing and inserting device, and Bi2 is the submergence depth of the ith environment second sealing and inserting device;
for the crude oil component ratio scoring matrix group C0(C1, C2, C3, C4), wherein C1 is a first preset crude oil component ratio scoring contrast matrix, C2 is a second preset crude oil component ratio scoring contrast matrix, C3 is a third preset crude oil component ratio scoring contrast matrix, and C4 is a fourth preset crude oil component ratio scoring contrast matrix;
for the ith preset crude oil component ratio score comparison value matrix Ci (Ci1, Ci2), i is 1,2,3,4, wherein Ci1 is the ith preset crude oil component ratio score comparison value of the first oil layer, and Ci2 is the ith preset crude oil component ratio score comparison value of the second oil layer;
for the pre-recovery time matrix group D0(D1, D2, D3, D4), wherein D1 is a pre-set first environment pre-recovery time matrix, D2 is a pre-set second environment pre-recovery time matrix, D3 is a pre-set third environment pre-recovery time matrix, and D4 is a pre-set fourth environment pre-recovery time matrix;
presetting an ith environment pre-sampling time matrix Di (Di1, Di2), wherein Di1 is the first sub-sampling pump pre-sampling time of the ith environment, and Di2 is the second sub-sampling pump pre-sampling time of the ith environment;
for the pre-oil recovery power matrix group E0(E1, E2, E3, E4), where E1 is a preset first environment pre-extraction power matrix, E2 is a preset second environment pre-extraction power matrix, E3 is a preset third environment pre-extraction power matrix, and E4 is a preset fourth environment pre-extraction power matrix;
for an ith preset environment pre-sampling power matrix Ei (Ei1, Ei2), wherein Ei1 is the first sub-sampling pump pre-sampling power of the ith preset environment, and Ei2 is the second sub-sampling pump pre-sampling power of the ith preset environment;
the central control module judges the oil field environment A according to the existing data and compares the judgment result with the internal parameters of A0:
when A is a preset ith type oilfield environment, i is 1,2,3 and 4, the central control module selects a corresponding preset ith environment insertion depth matrix Bi from a B0 matrix group as a preset submergence depth of the sealing insertion device;
when the second seal insertion device is submerged to a depth Bi2, the second sub-production pump carries out pre-production, the time length of the pre-production is set to be Di2, and the pre-production power of the second sub-production pump is set to be Ei 2;
when the second mining pump collects a specified amount of crude oil mixture from the second oil reservoir, the component analyzer performs detection analysis on the mined mixture, counts the crude oil ratio C1, the water ratio C2 and the natural gas ratio C3 in the mixture and transmits the statistical result to the central control module, and the central control module calculates a crude oil component ratio score C according to the statistical result:
wherein alpha is a compensation parameter of crude oil ratio C1 to crude oil component ratio score C, beta is a compensation parameter of water ratio C2 to crude oil component ratio score C, and gamma is a compensation parameter of natural gas ratio C3 to crude oil component ratio score C;
after the calculation is completed, the central control module compares the internal parameters C and C0:
when C ≠ Ci2, calculating the absolute value K of C-Ci2, comparing K with K by the central control module, wherein K is the ratio scoring tolerance range of the crude oil components:
when K is less than or equal to K, the central control module does not adjust the submergence depth of the second sealing and inserting device;
when K > K, the central control module calculates a depth adjustment value b to adjust the submergence depth of the second seal insertion device:
wherein theta is a depth adjustment value compensation parameter;
when the central control module completes the calculation of the depth adjustment value b, the central control module adjusts Bi by using b according to the size relation between C and Ci:
when C is greater than Ci2, the central control module downwards adjusts the submergence depth of the second seal insertion device to Bi2+ b;
when C is less than Ci2, the central control module adjusts the submergence depth of the second seal insertion device upwards to Bi 2-b;
after the adjustment is finished, repeating the operations until the crude oil component proportion score C meets the requirement; resetting the height of each production unit when the second seal insertion unit is adjusted up/down to the packer/artificial bottom hole position and the crude oil component ratio score C is not satisfactory;
after the adjustment of the submergence depth of the second sealing and inserting device meets the requirement, replacing Bi2 with Bi1, Ci2 with Ci1 and Di2 with Di1 in the steps, and performing the operation on the first sealing and inserting device until the adjustment of the submergence depth of the first sealing and inserting device meets the requirement.
2. The dual electric pump oil recovery process string as claimed in claim 1, wherein the central control module is further provided with a standard altitude value h and an operation power matrix set F0;
for the operating power matrix group F0(F1, F2, F3, F4), where F1 is a preset first environment operating power matrix, F2 is a preset second environment operating power matrix, F3 is a preset third environment operating power matrix, and F4 is a preset fourth environment operating power matrix;
for an ith environment operating power matrix Fi (Fi1, Fi2), wherein Fi1 presets the ith environment first production pump operating power, and Fi2 presets the ith environment second production pump operating power;
the central control module compares the actual altitude H with an altitude standard value H:
when H is not equal to H, calculating an absolute value M of H-H, comparing M with M by the central control module, wherein M is an altitude tolerance range:
when M is less than or equal to M, the central control module does not modify the operating power of the second separate production pump, and the operating power of the second separate production pump is Fi 2;
when M is larger than M, the central control module corrects the operating power of the second separate mining pump, and calculates a power adjustment value f:
wherein mu is a power adjustment value compensation parameter;
when the calculation is completed, the central control module adjusts the pump operation power according to the magnitude relation between the f value and H and H:
when H is larger than H, the central control module adjusts the operating power of the second sub-production pump upwards to Fi2+ f;
when H is less than H, the central control module adjusts the operating power of the second sub-production pump downwards to Fi 2-f;
and after the adjustment of the running power of the second mining pump is finished, replacing Fi2 in the steps with Fi1, and performing the operation on the first mining pump to adjust the running power of the first mining pump.
3. The dual electric pump oil recovery process string as claimed in claim 1, wherein the central control module is provided with a detection period T, an oil pressure variation matrix P0 and a power adjustment parameter matrix Q0;
for the oil pressure variation matrix P0(P1, P2, P3, P4), where P1 is a preset first stage oil pressure variation, P2 is a preset second stage oil pressure variation, P3 is a preset third stage oil pressure variation, and P4 is a preset fourth stage oil pressure variation;
for a power adjustment parameter matrix Q0(Q1, Q2, Q3), wherein Q1 is a preset first adjustment parameter, Q2 is a preset second adjustment parameter, and Q3 is a preset third adjustment parameter;
before oil recovery is formally started, the oil pressure detector respectively detects a first oil production layer oil pressure initial value p1 and a second oil production layer oil pressure initial value p2 and transmits the detection results to the central control module, and the central control module stores p1 and p2 and respectively starts the first sub-production pump and the second sub-production pump when the storage is completed;
when the collection time length reaches T, the oil pressure detector detects a first oil production layer oil pressure value P1 'and a second oil production layer oil pressure value P2' and transmits the detection result to the central control module, the central control module respectively calculates a first oil production layer oil pressure difference delta P1 to be P1-P1 'and a second oil production layer oil pressure difference delta P2 to be P2-P2' and compares the calculated delta pn with internal parameters of P0, n is 1, 2:
when delta pn is less than or equal to P1, the central control module does not adjust the operation power of the nth sub-production pump;
when delta pn is more than P1 and less than or equal to P2, the central control module selects Q1 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P2 and less than or equal to P3, the central control module selects Q2 from Q0 to adjust the operation power of the nth partial mining pump;
when delta pn is more than P3 and less than or equal to P4, the central control module selects Q3 from Q0 to adjust the operation power of the nth partial mining pump;
when the central control module selects Qj from Q0 to adjust the running power of the nth partial mining pump, j is 1,2 and 3, the central control module adjusts the running power of the nth partial mining pump to Fn', Fn is Fn Qj, wherein Fn is the initial running power of the nth partial mining pump;
when the central control module finishes adjusting the initial power of the nth mining pump, the central control module records the acquisition time of the nth mining pump again, and when the duration of the acquisition time reaches T, the central control module repeats the operation to recalculate the oil layer oil pressure difference delta pn' and adjusts the operating power of the nth mining pump again.
4. The dual-electric-pump oil extraction process pipe column of claim 3, characterized in that a first water injection pipe column and a second water injection pipe column are arranged outside the dual-electric-pump oil extraction process pipe column, each water injection pipe column is respectively connected with the central control module, and a water injection flow matrix W0 and a water injection time matrix to are arranged in the central control module;
for a water injection flow matrix W0(W1, W2), where W1 is the first preset water injection flow, W2 is the second preset water injection flow, W1 > W2;
for a water injection time matrix t0(t1, t2), wherein t1 is a first preset water injection time, t2 is a second preset water injection time, and t1 > t 2;
when the oil layer oil pressure difference delta pn of the nth partial production pump is larger than P4, the central control module starts an nth water injection pipe column to inject water into an nth oil layer:
the central control module sets the water injection flow of the nth water injection string to be W1, controls the oil pressure detector to detect the oil pressure value pn ' of the nth oil production layer when the water injection time of the nth water injection string reaches t1, and transmits the detection result to the central control module after the detection is finished, the central control module calculates the oil pressure difference delta P1 ' of the nth oil production layer and compares the delta P1 ' with P4, and the delta P1 ' is P1-P1 ':
when the delta pn 'is more than P4, repeating the operation until the delta pn' is less than or equal to P4;
when the delta pn ' is less than or equal to P4, the central control module sets the water injection flow of the nth water injection string to be W2 and controls the oil pressure detector to detect the oil pressure value pn of the nth oil production layer when the water injection time of the nth water injection string reaches t2, the oil pressure detector transmits the detection result to the central control module after the detection is finished, the central control module calculates the oil pressure difference delta P1 ' of the nth oil production layer and compares the delta P1 ' with P1, and the delta P1 ' -P1-P1 ':
when the delta pn is larger than P1, repeating the operation until the delta pn is less than or equal to P1;
and when the delta pn is less than or equal to P1, the central control module stops the operation of the nth water injection pipe column and adjusts the operation power of the nth partial production pump to Fn.
5. The dual-electric-pump oil extraction process tubular column as claimed in claim 4, wherein a water quality detector is arranged inside the water injection tubular column and used for detecting the quality of the injected water, when the water quality is unqualified, the water injection tubular column transmits water quality information to the central control module, the central control module controls the water injection tubular column to stop running and give out an alarm of unqualified water quality, and when workers complete water purification so that the water quality reaches the standard, the central control module controls the water injection tubular column to inject water into the oil well.
6. A dual electric pump production process string according to claim 1, wherein each seal insert device is in a closed state to seal the interior of the process string when the process string is raised or lowered, and foreign matter cannot enter the interior of the process string when each seal insert device is closed.
7. The dual electric pump production process string of claim 1, wherein when the process string simultaneously produces two oil layers, the products from the two oil layers enter the corresponding separate oil pipe passageways to allow the process string to produce the two oil layers separately.
8. The dual electric pump oil recovery process tubular column of claim 1, wherein the central control module is connected with a display screen to display the working state of each component and the downhole environment.
9. The dual electric pump production process string of claim 1, wherein the packer is hydraulically packer.
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