Oil well layered mining control device

Abstract

The invention discloses an oil well layered mining control device, which comprises a ground electric control assembly, an oil extraction layer section regulation and control scheme, an oil extraction layer section regulation and control module and a control module, wherein the oil extraction layer section regulation and control scheme is generated according to comprehensive analysis and research and judgment of various geological data; the underground electric control assembly can be lifted in the oil well casing through an armor cable based on the ground, the underground electric control assembly is integrated with a positioning module and an electric driving switch module, and the positioning module and the electric driving switch module are connected with the ground electric control assembly through circuits. According to the regulation and control scheme, an instruction is sent through the ground electric control assembly, and then the underground electric control assembly positioning module and the electric drive switch module execute the instruction to complete the task of the well layered mining scheme. The technical problems that in the prior art, due to the fact that oil well layered section liquid production, water content and pressure monitoring lags behind, layered section mining cannot be controlled at will, regulation and control means linkage collaboration is poor, and regulation and control efficiency is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil well production, and in particular to an oil well stratified production control device suitable for remote dynamic adaptive regulation between oil layers in a stratified oil well. Background Art

[0002] Currently, in the oil production process, stratified production technology is an important means to increase oil well production and recovery rate. Traditional stratified production technology usually uses a combination of mechanical packers and fixed production devices to achieve stratified flow control through pre-set throttle holes. However, in multi-layer oil well production technology, the pressure difference between layers is a key factor affecting the recovery rate. Traditional stratified production technology has at least the following core problems:

[0003] 1. Pressure monitoring lags;

[0004] Current interlayer pressure monitoring still relies on periodic shut-in testing to obtain stratified pressure data, which cannot reflect reservoir dynamics (such as sudden pressure drops and crossflow risks) in real time, resulting in a lag in corresponding control measures.

[0005] 2. The regulatory measures are outdated, costly and inefficient;

[0006] The existing production status adjustment can only rely on downhole operations and adjustment of the downhole tubing status to complete, which has a long cycle and high cost. It is impossible to adjust the stratified oil production status in real time according to dynamic changes, and it is impossible to achieve independent control of the stratified layers. The overall coordinated control efficiency is low. Summary of the Invention

[0007] To this end, the present invention provides an oil well stratified production control device to solve the technical problems in the prior art of oil well stratified production, such as pressure monitoring lag, inability to achieve independent stratified control, poor linkage and coordination of control means, and low control efficiency.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] An oil well stratified production control device, comprising:

[0010] A ground electric control component has a retractable kinetic energy output end, and the ground electric control component generates an oil well stratified production plan based on comprehensive data analysis and judgment, and generates oil production control instructions based on the plan;

[0011] The downhole electric control component is based on the retractable and retractable kinetic energy output end of the surface electric control component and is arranged in a liftable manner inside the oil well. The downhole electric control component is respectively integrated with a positioning module and an electric drive switch module. The positioning module and the electric drive switch module are respectively connected to the surface electric control component through circuits. The positioning module locks the layer segment and adopts technical means to simultaneously obtain the production fluid, water content, and pressure data and further judge whether it meets the mining conditions, and sends it to the surface electric control component. The oil production control instruction is received by the electric drive switch module to complete the oil production switch action control.

[0012] On the basis of the above technical solution, the present invention is further described as follows:

[0013] As a further embodiment of the present invention, the present invention further comprises:

[0014] The armor cable is connected between the ground electric control component and the downhole electric control component, and the two ends of the armor cable are respectively connected to the ground electric control component and the downhole electric control component through a circuit.

[0015] As a further embodiment of the present invention,

[0016] The ground electric control component is configured as a vehicle-mounted electric control component;

[0017] The vehicle-mounted electronic control assembly includes a vehicle-mounted power supply, a vehicle-mounted ground instrument cabinet, a ground control box, and a cable car connected by a circuit. The armor cable is wound around the retractable kinetic energy output end of the cable car, and the armor cable is connected to the transmission assembly of the downhole control instrument based on the cable car.

[0018] The armor cable is connected to the built-in control component of the ground control box via a circuit.

[0019] As a further embodiment of the present invention,

[0020] The positioning module and the electric drive switch module are respectively connected to the built-in control components of the ground control box through the armor cable through circuits;

[0021] The positioning module enables the on-board electronic control assembly to obtain the current layer of the downhole controller in real time. Simultaneously, the downhole controller positioning module and the electrically driven switch module monitor the real-time production and shutdown status of each production layer. Existing technologies are used to collect data on fluid production, water content, and pressure for each production layer, and based on this basic data, determine which production layers meet production conditions. The downhole controller then opens layers that meet production conditions and closes those that do not. The production status of each layer can be adjusted at any time based on dynamic changes in basic data, thereby maintaining a dynamically optimized production sequence for each layer. Compared to traditional data collection and control models, the acquisition of basic data on fluid production, water content, and pressure for each layer and the control of production status for each layer significantly shortens the time required, enabling real-time acquisition and control, significantly reducing costs, and significantly improving the intelligence of stratified production, the effectiveness of increasing oil production and reducing water content, and the overall practicality of its functionality.

[0022] As a further embodiment of the present invention, the present invention further comprises:

[0023] Tubing, packers, and inter-zone control components;

[0024] The oil pipe is arranged to extend vertically, and the packers and the inter-oil layer control components are provided in a plurality of groups. The plurality of groups of packers are fixedly arranged inside the oil pipe at intervals, so as to form a plurality of group of segmented oil layers based on the lower positions of the plurality of groups of packers. The plurality of groups of inter-oil layer control components are fixedly arranged in a plurality of group of segmented oil layers in a one-to-one correspondence, and the plurality of groups of inter-oil layer control components and the plurality of group of segmented oil layers are respectively arranged in a one-to-one correspondence and controllably on and off.

[0025] The inter-oil layer control component is communicatively connected with the electric drive switch module of the downhole controller.

[0026] As a further embodiment of the present invention, the present invention further comprises:

[0027] An eccentric wellhead is connected to the top end of the oil pipe;

[0028] The eccentric wellhead is fixedly provided with a support pulley, and the armored cable is connected to the downhole controller transmission assembly after the cable car passes through the support pulley of the eccentric wellhead.

[0029] As a further embodiment of the present invention, the present invention further comprises:

[0030] A pump hanging assembly is installed inside the oil pipe;

[0031] The pump hanging assembly includes an oil pump connected to a surface oil pumping unit and a matching rod string. The oil pump is connected to a plurality of groups of oil layer regulating and controlling assemblies via its matching rod string.

[0032] A stratified production control method according to the oil well stratified production control device comprises the following steps:

[0033] Based on the planning of the established standard layered production sequence for each segmented oil layer, the standard production threshold range is set for each segmented oil layer;

[0034] The production, water content and pressure monitoring data of each segmented oil layer are obtained in real time, and the mining process is completed for the segmented oil layer that meets the mining standard threshold range.

[0035] As a further embodiment of the present invention,

[0036] The method of sequentially acquiring the basic data of production, water content, and pressure of each segmented oil layer in real time and completing the mining process for the segmented oil layer that meets the mining requirements specifically includes:

[0037] The vehicle-mounted electronic control unit controls the release or recovery of the armored cable, which in turn drives the downhole controller. The downhole controller locates a sub-layer oil layer based on its positioning module and in accordance with the standard stratified production sequence. At the same time, it uses technical means to obtain the production, water content, and pressure data of the current sub-layer oil layer and determines whether the layer meets the production conditions based on the data.

[0038] When it is determined that the mining conditions are met, the on-board electronic control component sends a signal to the electric drive switch module of the downhole controller to control the oil layer control component between the corresponding oil layers to open, thereby completing the mining process of the corresponding oil layer;

[0039] When it is determined that the oil pressure value of the current segmented oil layer does not meet the mining conditions, the next segmented oil layer is adjusted according to the standard layered mining order to always maintain the dynamic optimization of the mining order of each oil layer.

[0040] The present invention has the following beneficial effects:

[0041] The device can effectively separate the established oil layers through the corresponding oil pipes of the packer, and can cooperate with the support pulley based on the eccentric wellhead, so that the downhole control instrument can be flexibly and accurately lowered into each oil layer section through the annular space of the oil pipe. At the same time, the electric drive switch module integrated in the downhole control instrument enables the on-board electronic control component to obtain the basic data of the liquid production, water content and pressure of the current layer in real time based on existing technology, and can further determine whether the mining conditions are met based on this data. In this way, the downhole control instrument sends signals to regulate the switching action of the control components between each oil layer, forming a closed-loop collaborative control system of "data acquisition-analysis-control". The oil production status of the corresponding layer sections between each oil layer is independently controllable, so that the mining sequence of each oil layer can be dynamically optimized at all times, avoiding the risks such as crossflow caused by interlayer pressure differences in traditional blind or sequential mining. Compared with the traditional manual control mode, the intelligence level of stratified mining, the oil increase and water reduction effect, and the overall functional practicality are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0043] Figure 1 A schematic diagram of the overall structure of an oil well stratified production control device provided by an embodiment of the present invention.

[0044] Figure 2 A schematic diagram of the functional principles of an oil well stratified production control device provided in an embodiment of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0046] Oil pipe 1; eccentric wellhead 2; packer 3; inter-layer control component 4; pump hanging component 5; vehicle-mounted electronic control component 6; armored cable 7; support pulley 8; downhole control instrument 9. DETAILED DESCRIPTION

[0047] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0048] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.

[0049] like Figures 1 to 2 As shown, an embodiment of the present invention provides an oil well stratified production control device, including an oil pipe 1, an eccentric wellhead 2, a packer 3, an oil layer control component 4, a pump hanging component 5, an on-board electronic control component 6, an armored cable 7, a support pulley 8 and a downhole controller 9, which is used to effectively complete the predetermined oil layer separation through the oil pipe 1 through the packer 3, and can cooperate with the support pulley 8 based on the eccentric wellhead 2, so that the downhole controller 9 can be flexibly and accurately lowered into each oil layer section through the annular space of the oil pipe 1. At the same time, the positioning module and the electric drive switch module integrated in the downhole controller 9 are used to complete the control of the oil production status of the downhole oil layer stratification section. The specific settings are as follows:

[0050] Please refer to Figure 1 The oil pipe 1 is extended vertically, and the top end of the oil pipe 1 is connected to the eccentric wellhead 2; the packers 3 and the inter-oil layer control components 4 are provided in several groups, and several groups of the packers 3 are fixed at intervals inside the oil pipe 1 to form several groups of segmented oil layers based on the lower positions of the several groups of the packers 3, and several groups of the inter-oil layer control components 4 are fixed in several groups of the segmented oil layers in a one-to-one correspondence, and several groups of the inter-oil layer control components 4 are respectively and one-to-one correspondingly set to the several groups of the segmented oil layers in a controllable on-off correspondence, so as to effectively complete the established oil layer separation process through the packers 3 corresponding to the oil pipe 1, and can realize the independent controllable oil production switch state corresponding to each segmented oil layer with the help of the inter-oil layer control components 4.

[0051] The pump hanging assembly 5 is installed inside the oil pipe 1. Specifically, the pump hanging assembly 5 includes a pumping pump and its matching rod string connected to the ground pumping unit. The pumping pump is connected and assembled with several groups of the oil layer control components 4 through its matching rod string, so as to lift the crude oil in each segmented oil layer from the well to the ground through the pump hanging assembly 5 and the oil layer control component 4.

[0052] Please refer to Figure 1 and Figure 2 The on-board electronic control component 6 is positioned and set on the ground; specifically, the on-board electronic control component 6 includes an on-board power supply, a on-board ground instrument cabinet, a ground control box and a cable car connected by a circuit. The armor cable 7 is wound on the cable car, and the armor cable 7 is assembled and connected with the downhole controller 9 after passing through the support pulley 8 of the eccentric wellhead 2 based on the cable car, so as to realize adaptive release or recovery of the armor cable 7 through the cable car, and enable the downhole controller 9 to be synchronously, flexibly and controllably and accurately lowered into each oil layer section based on the release and retraction status of the armor cable 7.

[0053] More specifically, one end of the armored cable 7 is connected to the built-in control component of the ground control box via a circuit, and the other end of the armored cable 7 is connected to the downhole controller 9 via a circuit; the downhole controller 9 is respectively integrated with a positioning module and an electric drive switch module, and the positioning module and the electric drive switch module are respectively connected to the built-in control component of the ground control box via a circuit via the armored cable 7, and the electric drive switch module of the downhole controller 9 is communicatively connected to the inter-oil layer control component 4. The positioning module is used to enable the on-board electronic control component 6 to obtain the current layer segment of the downhole controller 9 in real time. At the same time, the on-board electronic control component 6 can obtain the production, water content and pressure data of the current layer segment based on the downhole controller 9 in real time to form a mining plan, and according to the mining plan, send instructions to the electric drive switch module of the downhole controller 9, and then the electric drive switch module controls the switching action of the oil layer control component 4 accordingly to complete the control task, and the oil production status of the corresponding layer segments between each oil layer can be independently controlled, thereby achieving the dynamic optimization of the mining order of each oil layer.

[0054] The embodiment of the present invention further provides a stratified production control method according to the above-mentioned stratified production control device for oil wells, which specifically includes the following steps:

[0055] S1: Plan the established standard layered production sequence based on each segmented oil layer, and set the production standard threshold range corresponding to each segmented oil layer;

[0056] S2: sequentially obtain the production, water content, and pressure data of each segmented oil layer in real time, and complete the mining process for the segmented oil layer that meets the mining standard threshold range;

[0057] The specific process is as follows: the armored cable 7 is released or recovered by the vehicle-mounted electronic control component 6, and the armored cable 7 is synchronously driven by the downhole controller 9. The downhole controller 9 locates one of the segmented oil layers based on its positioning module and in accordance with the standard layered production sequence. At the same time, the production, water content, and pressure data of the layer are obtained through technical means. The basic data are evaluated and analyzed to determine whether the layer meets the mining standard range. If it is judged to meet the mining standard threshold range, the vehicle-mounted electronic control component 6 sends a signal to the electric drive switch module of the downhole controller 9 to control the oil layer inter-layer control component 4 of the corresponding segmented oil layer to open, thereby completing the mining process of the corresponding segmented oil layer.

[0058] When it is determined that the current segmented oil layer does not meet the mining conditions, the next segmented oil layer is adjusted according to the standard layered mining order to always maintain the dynamic optimization of the mining order of each oil layer.

[0059] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. An oil well stratified production control device, characterized in that: include: A ground electric control component has a retractable kinetic energy output end, and the ground electric control component generates an oil well stratified production plan based on comprehensive data analysis and judgment, and then generates oil production control instructions based on the plan; The downhole electric control component is based on the retractable and retractable kinetic energy output end of the ground electric control component and is arranged in a liftable manner inside the oil well, and the downhole electric control component is respectively integrated with a positioning module and an electric drive switch module. The positioning module and the electric drive switch module are respectively connected to the ground electric control component through circuits. The positioning module and the electric drive switch module are used to adjust the switch state of the internal layer of the oil well and simultaneously collect the production fluid, water content and pressure data under the corresponding state to form an extraction plan. According to the requirements of the extraction plan, the ground electric control component receives the oil production control instructions through the electric drive switch module to complete the oil production switch action control.

2. The oil well stratified production control device according to claim 1, characterized in that: Also includes: The armor cable is connected between the ground electric control component and the downhole electric control component, and the two ends of the armor cable are respectively connected to the ground electric control component and the downhole electric control component through a circuit.

3. The oil well stratified production control device according to claim 2, characterized in that: The ground electric control component is configured as a vehicle-mounted electric control component; The vehicle-mounted electronic control assembly includes a vehicle-mounted power supply, a vehicle-mounted ground instrument cabinet, a ground control box, and a cable car connected by a circuit. The armor cable is wound around the retractable kinetic energy output end of the cable car, and the armor cable is connected to the transmission assembly of the downhole control instrument based on the cable car. The armor cable is connected to the built-in control component of the ground control box via a circuit.

4. The oil well stratified production control device according to claim 3, characterized in that: The positioning module and the electric drive switch module are respectively connected to the built-in control components of the ground control box through the armor cable through circuits; Through the positioning module, the on-board electronic control component can obtain the current layer section of the downhole controller in real time. Technical means can be used to simultaneously obtain basic data on liquid production, water content, and pressure, and further determine whether the mining conditions are met. Based on the judgment result, the on-board electronic control component sends a signal to the electric drive switch module of the downhole controller, and the electric drive switch module then controls the switch action of the current layer section accordingly.

5. The oil well stratified production control device according to claim 4, characterized in that: Also includes: Tubing, packers, and inter-zone control components; The oil pipe is arranged to extend vertically, and the packers and the inter-oil layer control components are provided in a plurality of groups. The plurality of groups of packers are fixedly arranged inside the oil pipe at intervals, so as to form a plurality of group of segmented oil layers based on the lower positions of the plurality of groups of packers. The plurality of groups of inter-oil layer control components are fixedly arranged in a plurality of group of segmented oil layers in a one-to-one correspondence, and the plurality of groups of inter-oil layer control components and the plurality of group of segmented oil layers are respectively arranged in a one-to-one correspondence and controllably on and off. The inter-oil layer control component is communicatively connected with the electric drive switch module of the downhole controller.

6. The oil well stratified production control device according to claim 5, characterized in that: Also includes: An eccentric wellhead is connected to the top end of the oil pipe; The eccentric wellhead is fixedly provided with a support pulley, and the armored cable is connected to the downhole controller transmission assembly after the cable car passes through the support pulley of the eccentric wellhead.

7. The oil well stratified production control device according to claim 5, characterized in that: Also includes: A pump hanging assembly is installed inside the oil pipe; The pump hanging assembly includes an oil pump connected to a surface oil pumping unit and a matching rod string. The oil pump is connected to a plurality of groups of oil layer regulating and controlling assemblies via its matching rod string.

8. A stratified production control method for an oil well stratified production control device according to any one of claims 5 to 7, characterized in that: The specific steps include: Based on the planning of the established standard layered production sequence for each segmented oil layer, the standard production threshold range is set for each segmented oil layer; The production, water content and pressure data of each segmented oil layer are obtained in real time, and the mining process is completed corresponding to the segmented oil layer that meets the mining requirements.

9. The oil well stratified production control method according to claim 8, characterized in that: The process of sequentially acquiring the production, water content, and pressure monitoring data of each segmented oil layer in real time and completing the mining process for the segmented oil layer that meets the mining requirements specifically includes: The vehicle-mounted electronic control unit controls the release or recovery of the armored cable, which in turn drives the downhole controller. The downhole controller locates a sub-layer oil layer based on its positioning module and in accordance with the standard stratified production sequence. At the same time, it uses technical means to obtain the production, water content, and pressure values ​​of the current sub-layer oil layer and determines whether the layer meets the production conditions based on the data. When it is determined that the mining conditions are met, the on-board electronic control component sends a signal to the electric drive switch module of the downhole controller to control the oil layer control component between the corresponding oil layers to open, thereby completing the mining process of the corresponding oil layer; When it is determined that the mining conditions are not met, the next segmented oil layer is adjusted according to the standard layered mining order to always maintain the dynamic optimization of the mining order of each oil layer.

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