Integrated wireless communication layered water injection method and system

Abstract

The invention belongs to the field of oil field separated layer water injection, and discloses an integrated wireless communication separated layer water injection method and system which comprises a ground wireless communication control module, a multi-layer injection allocation wireless communication control module, a multi-channel oil pipe and a multi-channel overflowing packer. The battery bin, the circuit and sensor bin, the valve driving bin, the channel shunting section and the flow monitoring bin are arranged in the multi-layer injection allocation wireless communication control module, so that water injection flow and water injection pressure of different underground water injection layer sections of a water injection well are collected and adjusted; meanwhile, other modules are matched to realize water distribution requirements of multiple water injection layer sections and a wireless testing and adjusting function; compared with existing wireless layered water injection controllers which are controlled independently and cannot communicate reliably, the multi-layer injection allocation wireless communication control module can control the flow of each layer section at the same time, and when communication with flow or pressure as a medium is carried out, the communication rate is higher, and the recognition rate and the accuracy rate are higher.

Description

Technical Field

[0001] This invention belongs to the field of oilfield stratified water injection, and particularly relates to an integrated wireless communication stratified water injection method and system. Background Technology

[0002] Water injection is the process of injecting water of the required quality from injection wells into the oil reservoir using injection equipment to maintain reservoir pressure. It is a crucial method for replenishing formation energy and improving oil recovery during oilfield development. The level of water injection well management technology directly determines the success of oilfield development and, consequently, the lifespan of the oilfield.

[0003] After an oil field is put into development, as the extraction time increases, the energy of the oil reservoir itself will be continuously consumed, causing the reservoir pressure to drop continuously. This leads to significant degassing of the underground crude oil, increased viscosity, and a substantial reduction in well production, sometimes even resulting in well shutdown and production stoppage. This leaves a large amount of dead oil underground that cannot be extracted. To compensate for the underground deficit caused by crude oil extraction, maintain or increase reservoir pressure, achieve high and stable oil production, and obtain a high recovery rate, water injection into the oil field is necessary.

[0004] Because domestic oilfields generally have multi-layered and heterogeneous characteristics, indiscriminate water injection can lead to single-layer surges. Therefore, stratified water injection is widely adopted. With the continuous application and development of automated stratified water injection technology, domestic stratified water injection technology has achieved control of stratified flow rates and monitoring of downhole parameters.

[0005] In the process of stratified water injection development in oilfields, the rate of obstruction during measurement and adjustment is high, testing instruments frequently fall into the well, packer sealing verification is difficult, and the level of digitalization in water injection is low. In order to eliminate the cable testing and adjustment process, improve the level of digitalization in water injection, realize single-layer flow testing and adjustment of injection wells in the central control room, and realize real-time remote transmission of data such as flow rate, pressure, temperature, and packer sealing verification to the central control room, research was carried out on digital intelligent stratified water injection technology.

[0006] Currently, cable-based digital injection technology requires bundling cables outside the tubing for installation, which presents problems such as complex on-site operations, low efficiency, and difficulty in pressurized operations. Cableless digital injection technology, on the other hand, requires the use of a logging truck and traditional methods of running cables and instruments to complete operations when historical data needs to be recorded or parameters adjusted. Summary of the Invention

[0007] To overcome the shortcomings of cable-based digital water injection technology, such as complex on-site construction, low construction efficiency, and high difficulty in pressurized operation, and cableless digital water injection technology, which requires the use of logging trucks and traditional methods of lowering cables and instruments to complete operations when historical data or parameter adjustments are needed, this invention provides an integrated wireless communication layered water injection method and system with fast wireless communication control, simple control logic, and the ability to operate under pressure and with simple construction.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] An integrated wireless communication layered water injection system includes: a ground wireless communication control module, a multi-layer injection wireless communication control module, a multi-channel oil pipe, and a multi-channel flow packer;

[0010] The ground wireless communication control module is used to detect water injection flow rate, water injection pressure, and control the total water injection volume;

[0011] The multi-layer injection wireless communication control module is used to control the water injection flow rate of each injection layer, provide feedback on the water injection flow rate parameters, and acquire the pressure and temperature information of the injection layer.

[0012] The multi-layer injection wireless communication control module is also used to collect water injection flow information and control valves in each injection layer, enabling two-way wireless communication with the ground wireless communication control module.

[0013] Multi-channel overflow packers are used to divide downhole casing into different water injection zones;

[0014] The multi-channel oil pipe is used to connect the multi-layer injection wireless communication control module and the multi-channel overcurrent packer to divert the flow of different water injection sections and connect them to the corresponding water injection sections for water injection operation.

[0015] Furthermore, the ground wireless communication control module is connected to a pressurization pump, which is used to provide pressure for the water injection process.

[0016] Furthermore, the pressurization pump is connected to the ground wireless communication control module via an oil pipe, and the ground wireless communication control module is connected to the multi-layer dispensing wireless communication control module via an oil pipe.

[0017] Furthermore, the multi-layer dispensing wireless communication control module includes a battery compartment for providing power to the multi-layer dispensing wireless communication control module.

[0018] Furthermore, the multi-layer dispensing wireless communication control module also includes a circuit and sensor compartment, which is used for information acquisition, driving and controlling the valve motor, and parsing wireless communication information and control carrier waves.

[0019] Furthermore, the multi-layer dispensing wireless communication control module also includes a valve drive chamber, which amplifies the motor torque to enable the valve to open normally under high pressure.

[0020] Furthermore, the multi-layer injection wireless communication control module also includes a channel diversion section, which is used to direct the flow channels controlled by different valves to different injection formations.

[0021] Furthermore, the multi-layer dispensing wireless communication control module also includes a flow monitoring chamber, which is used to monitor the flow of each channel.

[0022] Furthermore, the number of multi-layer dispensing wireless communication control modules is one or more, and multiple multi-layer dispensing wireless communication control modules are connected to each other via cables.

[0023] Furthermore, the multi-channel overflow packer is also used to connect the channel of this layer to the water injection channel of this layer from the multi-channel oil pipe for water injection operation.

[0024] On the other hand, the present invention also discloses an integrated wireless communication layered water injection method, comprising the following steps:

[0025] The ground-based wireless communication control module is used to detect water injection flow rate, water injection pressure, and control the total injection volume.

[0026] The multi-layer injection wireless communication control module is used to control the water injection flow rate of each layer and provide feedback on the water injection flow rate parameters, as well as to obtain the pressure and temperature information of the water injection layer.

[0027] The multi-layer injection wireless communication control module collects water injection flow information and controls the valves of each injection layer, while also achieving two-way wireless communication with the ground wireless communication control module.

[0028] A multi-channel flow packer is used to divide the downhole casing into different water injection zones;

[0029] By using multi-channel oil pipes to connect the multi-layer injection wireless communication control module and the multi-channel overcurrent packer, the flow of different layers is diverted and connected to the corresponding layer for water injection operation.

[0030] The technical effects and advantages of this invention are as follows:

[0031] This invention, by incorporating a battery compartment, circuit and sensor compartment, valve drive compartment, channel diversion section, and flow monitoring compartment within a multi-layer injection wireless communication control module, enables the acquisition and adjustment of injection flow rate and pressure at different injection layers in the injection well. Simultaneously, it works in conjunction with other modules to meet the water distribution needs of multiple injection layers and provide wireless measurement and adjustment functions. This invention utilizes the cooperation between a ground wireless communication controller and the multi-layer injection wireless communication control module. The water flow is likened to current in a circuit, the ground wireless communication controller and the multi-layer injection wireless communication control module are equivalent to two single-pole switches, the tubing is considered a wire, the booster pump is considered a battery, the formation is considered a load, and the current... The circuit travels from a surface switch, through a wire to an underground switch, then through a load, and finally through a battery to provide voltage, forming a closed current loop. When any switch is opened, the other switch can detect the interruption or reduction of current in the wire. By coupling the transmitted information into this switching action, half-duplex communication between the two switches can be achieved. Compared to existing wireless tiered water injection controllers that operate independently and cannot communicate reliably, this multi-layered injection wireless communication control module can simultaneously control the flow rate of each tier. When communicating using flow rate or pressure as the medium, the communication speed is faster, and the recognition rate and accuracy are higher.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0033] Figure 1 This is a diagram illustrating the architecture of an integrated wireless communication layered water injection system according to the present invention.

[0034] Figure 2 This is a signal circuit simulation diagram of an integrated wireless communication layered water injection system according to the present invention;

[0035] Figure 3 This is a flowchart of an integrated wireless communication layered water injection method according to the present invention;

[0036] Figure 4 This is a diagram of the integrated wireless communication layered water injection system architecture according to an embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Figure 1 This is a diagram of an integrated wireless communication layered water injection system architecture according to the present invention, as shown below. Figure 1 As shown, the present invention provides an integrated wireless communication layered water injection system, comprising:

[0039] Ground wireless communication control module, multi-layer injection wireless communication control module, multi-channel tubing and multi-channel overcurrent packer;

[0040] The ground wireless communication control module is used to detect water injection flow rate, water injection pressure, and control the total injection volume;

[0041] The multi-layer injection wireless communication control module is used to control the water injection flow rate of each injection layer, provide feedback on the water injection flow rate parameters, and acquire the pressure and temperature information of the injection layer.

[0042] The multi-layer injection wireless communication control module is also used to collect water injection flow information and control valves in each injection layer, enabling two-way wireless communication with the ground wireless communication control module.

[0043] Multi-channel overflow packers are used to divide downhole casing into different water injection zones;

[0044] Multi-channel tubing is used to connect the multi-layer injection wireless communication control module and the multi-channel overcurrent packer, splitting the flow of different layers of the flow controller and connecting them to the corresponding layers for water injection operation.

[0045] Furthermore, the ground wireless communication control module is connected to a pressurization pump, which is used to provide pressure for the water injection process.

[0046] Furthermore, the pressurization pump is connected to the ground wireless communication control module via an oil pipe, and the ground wireless communication control module is connected to the multi-layer dispensing wireless communication control module via an oil pipe.

[0047] Figure 2 A simulation diagram of the signal lines for an integrated wireless communication layered water injection system, such as... Figure 2 As shown, water flow can be likened to current in a circuit. The surface wireless communication control module and the multi-layer injection wireless communication control module are equivalent to two single-pole switches. The tubing can be considered as a conductor, the booster pump as a battery, and the formation as a load. The current flows through the surface switch, then through the conductor to the downhole switch, then through the load, and finally the battery provides voltage, forming a closed current loop circuit. When either switch is open, the other switch can detect the interruption or reduction of current in the conductor. By coupling the transmitted information into this switching action, half-duplex communication between the two switches can be achieved.

[0048] Furthermore, the multi-layer dispensing wireless communication control module includes a battery compartment for providing power to the multi-layer dispensing wireless communication control module.

[0049] Furthermore, the multi-layer dispensing wireless communication control module also includes a circuit and sensor compartment, which is used for information acquisition, driving and controlling the valve motor, and parsing wireless communication information and control carrier waves.

[0050] Furthermore, the multi-layer dispensing wireless communication control module also includes a valve drive chamber, which amplifies the motor torque to enable the valve to open normally under high pressure.

[0051] Furthermore, the multi-layer injection wireless communication control module also includes a channel diversion section, which is used to direct the flow channels controlled by different valves to different injection formations.

[0052] Furthermore, the multi-layer dispensing wireless communication control module also includes a flow monitoring chamber, which is used to monitor the flow of each channel.

[0053] By setting up a battery compartment, circuit and sensor compartment, valve drive compartment, channel diversion section and flow monitoring compartment in the multi-layer injection wireless communication control module, the water injection flow rate and water injection pressure of different water injection layers in the injection well can be collected and adjusted. At the same time, it can work with other modules to realize the water distribution needs of multiple water injection layers and wireless measurement and adjustment functions.

[0054] Furthermore, the multi-channel overflow packer is also used to connect the channel of this layer to the water injection channel of this layer from the multi-channel oil pipe for water injection operation.

[0055] Furthermore, the number of multi-layer refueling wireless communication control modules is one or more, and the multiple multi-layer refueling wireless communication control modules are connected by cables, so that the multi-layer refueling wireless communication control modules can conduct reliable wired communication. Only one of the multi-layer refueling wireless communication control modules acts as the host and is responsible for wireless communication with the ground wireless communication control module.

[0056] on the other hand, Figure 3 This is a flowchart of an integrated wireless communication layered water injection method according to the present invention, as shown below. Figure 3 As shown, the present invention also discloses an integrated wireless communication layered water injection method, comprising the following steps:

[0057] The ground-based wireless communication control module is used to detect water injection flow rate, water injection pressure, and control the total injection volume.

[0058] The multi-layer injection wireless communication control module is used to control the water injection flow rate of each injection layer and provide feedback on the water injection flow rate parameters, as well as to obtain the pressure and temperature information of the injection layer.

[0059] A multi-channel flow packer is used to divide the downhole casing into different water injection zones;

[0060] By using multi-channel oil pipes to connect the multi-layer injection wireless communication control module and the multi-channel overcurrent packer, the flow of different layers is diverted and connected to the corresponding layer for water injection operation.

[0061] Example

[0062] During construction, the multi-layer injection wireless communication control module is first connected to the tubing. If there are multiple multi-layer injection wireless communication control modules, they must be connected by cables before being lowered into the well. The bottom tubing inlet is sealed with a plug. After well completion, a surface wireless communication control module needs to be installed on the surface to monitor surface parameters and conduct wireless carrier communication with the downhole system for flow or pressure. The surface wireless communication control module is connected to the multi-layer injection wireless communication control module via tubing. The surface wireless communication control module includes a surface controller, an inlet wireless communication controller, and a Christmas tree. Figure 4 This is a diagram of the integrated wireless communication layered water injection system architecture of this embodiment, as shown below. Figure 4 As shown, the multi-layer water injection wireless communication control module in this embodiment includes a dual-channel water distributor and a battery or generator. The dual-channel water distributor includes a circuit and sensor compartment, a valve drive compartment, a channel diversion section, and a flow monitoring compartment. The dual-channel water distributor controls the opening and closing of two water nozzles through two valves, thereby controlling the water injection flow rate of the two strata. Each dual-channel water distributor can be used as an independent wireless communication stratified water injection device after being connected to the battery or generator. When more layers need to be injected, multiple dual-channel water distributors can be set up, and adjacent dual-channel water distributors can be connected by cables. In this way, the dual-channel water distributors can conduct reliable wired communication, with only one dual-channel water distributor acting as the host responsible for wireless communication with the ground wireless communication control module.

[0063] During water injection, the water flow is likened to current in a circuit. The surface wireless communication controller and each multi-layer injection wireless communication control module are equivalent to multiple single-pole switches. The oil pipe is considered as a wire, the booster pump as a battery, and the formation as a load. The current flows through the surface switch, then through the wire to each downhole switch, then through the load, and finally through the battery to provide voltage, forming a closed current loop circuit. When any switch is opened, the other switch can detect the interruption or reduction of current in the wire. By coupling the transmitted information into this switching action, half-duplex communication between the surface and downhole switches can be achieved. Compared to existing wireless stratified water injection controllers that control each other independently and cannot communicate reliably, this multi-layer injection wireless communication control module can simultaneously control the flow rate of each layer. When communicating with flow rate or pressure as the medium, the communication rate is faster, and the recognition rate and accuracy are higher.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated wireless communication layered waterflood system, characterized by, The system comprises a ground wireless communication control module, a multi-layer injection wireless communication control module, a multi-channel oil pipe and a multi-channel overflow packer. The ground wireless communication control module is used for detecting injection flow rate, injection pressure and controlling total injection volume. The multi-layer injection wireless communication control module is used for injection flow rate control, injection flow rate parameter feedback and pressure and temperature information acquisition of each injection layer. The multi-layer injection wireless communication control module is also used for injection flow rate information acquisition and valve control of each injection layer, and realizes wireless bidirectional communication with the ground wireless communication control module. The multi-channel overflow packer is used for separating the downhole casing into different injection layers. The multi-channel oil pipe is used for connecting the multi-layer injection wireless communication control module and the multi-channel overflow packer, and shunting the flow rates of different injection layers to the corresponding injection layers for injection operation.

2. The integrated wireless communication layered injection system according to claim 1, wherein the ground wireless communication control module is connected with a pressure pump, and the pressure pump is used for providing pressure for the injection process.

3. The integrated wireless communication layered injection system according to claim 2, wherein the pressure pump is connected with the ground wireless communication control module through the oil pipe, and the ground wireless communication control module is connected with the multi-layer injection wireless communication control module through the oil pipe.

4. The integrated wireless communication layered injection system according to claim 1, wherein the multi-layer injection wireless communication control module comprises a battery compartment, and the battery compartment is used for providing energy for the multi-layer injection wireless communication control module.

5. The integrated wireless communication layered injection system according to claim 4, wherein the multi-layer injection wireless communication control module further comprises a circuit and sensor compartment, and the circuit and sensor compartment is used for information acquisition, driving motor control valve and analyzing wireless communication information and control carrier.

6. The integrated wireless communication layered injection system according to claim 5, wherein the multi-layer injection wireless communication control module further comprises a valve driving compartment, and the valve driving compartment is used for amplifying motor torque to enable the valve to normally open under high pressure.

7. The integrated wireless communication layered injection system according to claim 6, wherein the multi-layer injection wireless communication control module further comprises a channel shunting section, and the channel shunting section is used for leading flow channels controlled by different valves to different injection formations.

8. The integrated wireless communication layered injection system according to claim 7, wherein the multi-layer injection wireless communication control module further comprises a flow rate monitoring compartment, and the flow rate monitoring compartment is used for monitoring the flow rates of each channel.

9. The integrated wireless communication layered injection system according to claim 8, wherein the number of the multi-layer injection wireless communication control module is one or more, and the plurality of multi-layer injection wireless communication control modules are connected through cables. ​ ​ ​ ​ ​ ​ ​ ​ 10. The integrated wireless communication layered water injection system according to claim 1, wherein the multi-channel through-flow packer is further used to connect the layer channel from the multi-channel tubing to the layer injection channel for water injection operation. The multi-channel through-flow packer is further used to connect the layer channel from the multi-channel tubing to the layer injection channel for water injection operation.

11. An integrated wireless communication hierarchical water-filling method, characterized by, The method comprises the following steps: The ground wireless communication control module is used to detect water injection flow, water injection pressure and control total injection amount; The multi-layer injection wireless communication control module is used to control water injection flow of each layer and feedback water injection flow parameters, and obtain pressure and temperature information of the water injection layer; The multi-layer injection wireless communication control module is used to collect water injection flow information and control valves of each water injection layer, and realize wireless two-way communication with the ground wireless communication control module; The multi-channel through-flow packer is used to separate the downhole casing into different water injection layers; The multi-layer injection wireless communication control module is connected with the multi-channel through-flow packer through the multi-channel tubing, so as to distribute the flow of different layers and connect to the corresponding layer for water injection operation.

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