High-viscosity crude oil gathering process method and device and storage medium

Abstract

The application relates to a high-viscosity crude oil gathering and transportation process method, device and storage medium, and the method comprises the following steps: determining the water-mixing pressure of an oil well; adjusting the water-mixing pressure of high-viscosity crude oil; establishing a low-pressure area unpowered recovery casing gas; and optimizing throttle parameters. The high-viscosity crude oil gathering and transportation process method, device and storage medium provided by the application effectively solve the problems of high viscosity, large gathering resistance and waste of residual natural gas in the casing during the high-viscosity crude oil gathering and transportation process of the wellhead only matched with a water injection pipeline, and can guide the construction of high-viscosity crude oil oilfield ground engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crude oil transportation, and in particular to a high-viscosity crude oil gathering and transportation process method, device and storage medium. BACKGROUND

[0002] In the gathering and transportation process of high-viscosity crude oil, due to its high viscosity and poor related properties such as freezing point, it is difficult to be transported by the commonly used single-pipe normal-temperature gathering and transportation process, so the double-pipe water-mixing gathering and transportation method is often used in the gathering and transportation process to ensure production by mixing water to reduce viscosity. When high-viscosity crude oil is produced in an oil well, the oil well does not have a water-mixing pipeline and only has a wellhead water injection pipeline. Due to the high water injection pressure and the low water-mixing pressure (the water injection pressure is higher than 16 MPa and the water-mixing pressure is lower than 1.5 MPa), the water injection pipeline cannot be directly used for water mixing. At the same time, due to the fact that the oil pressure of the oil well is higher than the casing pressure, the natural gas existing between the bottom of the high-viscosity crude oil well and the wellhead oil sleeve annulus cannot be discharged, which causes waste of natural gas resources. At present, the natural gas is mainly discharged after the pressure is increased to be greater than or equal to the oil pressure by using a constant pressure valve, but the increase of the casing pressure will affect the downhole dynamic liquid level, causing insufficient release of the oil well production capacity, so it needs to be improved. SUMMARY

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a high-viscosity crude oil gathering and transportation process method, device and storage medium.

[0004] In a first aspect, the present application provides a high-viscosity crude oil gathering and transportation process method, which comprises the following steps:

[0005] determining the water-mixing pressure of the oil well;

[0006] adjusting the water-mixing pressure of the high-viscosity crude oil;

[0007] establishing a low-pressure zone passive recovery of casing gas;

[0008] optimizing the throttling parameters.

[0009] Preferably, the step of determining the water-mixing pressure of the oil well comprises the following steps:

[0010] obtaining the wellhead back pressure of the high-viscosity oil well;

[0011] obtaining a water-mixing pressure calculation formula of the oil well;

[0012] calculating the water-mixing pressure of the oil well according to the wellhead back pressure of the high-viscosity oil well and the water-mixing pressure calculation formula of the oil well.

[0013] Preferably, the step of calculating the water-mixing pressure of the oil well according to the wellhead back pressure of the high-viscosity oil well and the water-mixing pressure calculation formula of the oil well comprises the following steps:

[0014] obtaining parameters of the water-mixing pressure calculation formula of the oil well;

[0015] The high-viscosity oil well wellhead back pressure and the parameter are substituted into the water-mixing pressure calculation formula of the oil well.

[0016] Preferably, the expression of the water-mixing pressure calculation formula of the oil well is:

[0017] P 掺 ≥P 回 +k×0.1;

[0018] Wherein, P 掺 represents the water-mixing pressure, P 回 represents the high-viscosity oil well wellhead back pressure, and k represents a safety factor.

[0019] Preferably, the adjusting of the water-mixing pressure of the high-viscosity crude oil comprises the steps of:

[0020] obtaining a high-pressure water injection system;

[0021] configuring a throttle valve in the high-pressure water injection system;

[0022] adjusting the opening degree of the throttle valve.

[0023] Preferably, the establishing of the low-pressure zone unpowered recovery casing gas comprises the steps of:

[0024] obtaining a water injection pipeline;

[0025] installing a check valve at an inlet in the water injection pipeline.

[0026] Preferably, the optimizing of the throttle parameter comprises the steps of:

[0027] obtaining an oil pressure change value;

[0028] obtaining a liquid level change value;

[0029] adjusting the throttle pressure according to the oil pressure change value and the liquid level change value.

[0030] In a second aspect, the application provides a high-viscosity crude oil gathering and transportation process device, comprising:

[0031] a pressure determination module for determining the water-mixing pressure of an oil well;

[0032] a pressure adjustment module for adjusting the water-mixing pressure of high-viscosity crude oil;

[0033] a casing gas establishing module for establishing low-pressure zone unpowered recovery casing gas;

[0034] a parameter optimization module for optimizing a throttle parameter.

[0035] In a third aspect, an electronic device is provided, comprising:

[0036] at least one processor; and

[0037] a memory communicatively connected with the at least one processor; wherein

[0038] the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the high-viscosity crude oil gathering process method of any of the preceding.

[0039] In a fourth aspect, a non-transitory computer-readable storage medium is provided, the non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the high-viscosity crude oil gathering process method of any of the preceding.

[0040] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following advantages:

[0041] The high-viscosity crude oil gathering process method, device and storage medium provided by the embodiments of the present application effectively solve the problems of high viscosity and large gathering resistance in the high-viscosity crude oil gathering process with only a water injection pipeline matched with the wellhead, and the waste of residual natural gas in the casing, and can guide the construction of high-viscosity crude oil oilfield surface engineering. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0044] Figure 1 is a flowchart of a high-viscosity crude oil gathering process method provided by the embodiments of the present application;

[0045] Figure 2 is a structural schematic diagram of a high-viscosity crude oil gathering process device provided by the embodiments of the present application;

[0046] Figure 3 is a structural schematic diagram of an electronic device provided by the present application;

[0047] Figure 4 is a structural schematic diagram of a non-transitory computer-readable storage medium provided by the present application;

[0048] Figure 5A high-viscosity crude oil gathering process method provided by the embodiment of the present application is a water injection pipeline pressure reduction and water mixing process schematic diagram.

[0049] Figure 6 A high-viscosity crude oil gathering process method provided by the embodiment of the present application is a casing gas recovery device schematic diagram. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0051] Figure 1 A high-viscosity crude oil gathering process method provided by the embodiment of the present application is a process schematic diagram.

[0052] The present application provides a high-viscosity crude oil gathering process method, which comprises the following steps:

[0053] S1: determining water mixing pressure of an oil well;

[0054] In the embodiments of the present application, the step of determining the water mixing pressure of the oil well comprises the following steps:

[0055] obtaining high-viscosity oil well wellhead back pressure;

[0056] obtaining an oil well water mixing pressure calculation formula;

[0057] calculating the water mixing pressure of the oil well according to the high-viscosity oil well wellhead back pressure and the oil well water mixing pressure calculation formula.

[0058] Specifically, the minimum pressure required for water mixing of viscous oil is calculated according to different high-viscosity oil well wellhead oil pressure and oil well water mixing pressure calculation formula.

[0059] In the embodiments of the present application, the step of calculating the water mixing pressure of the oil well according to the high-viscosity oil well wellhead back pressure and the oil well water mixing pressure calculation formula comprises the following steps:

[0060] obtaining parameters of the oil well water mixing pressure calculation formula;

[0061] substituting the high-viscosity oil well wellhead back pressure and the parameters into the oil well water mixing pressure calculation formula.

[0062] Specifically, each parameter in the high-viscosity oil well wellhead back pressure and the oil well water mixing pressure calculation formula is substituted into the oil well water mixing pressure calculation formula. The water mixing pressure of the oil well can be calculated.

[0063] In the embodiment of the present application, the expression of the water-mixing pressure calculation formula of the oil well is:

[0064] P 掺 ≥P 回 +k×0.1;

[0065] wherein, P 掺 represents the water-mixing pressure, P 回 represents the wellhead back pressure of the high-viscosity oil well, and k represents a safety factor.

[0066] S2: adjusting the water-mixing pressure of the high-viscosity crude oil;

[0067] In the embodiment of the present application, the adjusting the water-mixing pressure of the high-viscosity crude oil comprises the steps of:

[0068] obtaining a high-pressure water injection system;

[0069] configuring a throttle valve in the high-pressure water injection system;

[0070] adjusting the opening degree of the throttle valve.

[0071] Specifically, the structure and flow of the existing high-pressure water injection system are adjusted, and the water injection pressure is reduced to the water-mixing pressure requirement through the adjustment of the opening degree of the throttle valve.

[0072] As Figure 5 , according to the production and operation status of the oilfield high-viscosity crude oil well, the water-mixing pressure needs to be higher than the wellhead pressure. Generally, the water-mixing pressure is 1.2-1.5 MPa, and the water injection pressure is 16-35 MPa. The pipeline is reformed to increase the throttle valve, so that the main flow has the function of high-pressure water injection pressure reduction and low-pressure water-mixing. (The main flow is in the open state of pneumatic valves A, C and E, and in the closed state of pneumatic valves B, C and F.) If it is found that the pressure difference before and after the throttle valve is less than 0.1 MPa in the pressure monitoring and remote transmission before and after the throttle valve in the main flow, it means that the throttle valve is invalid, and at this time, the main flow is closed. Switch to the standby flow (the standby flow is in the closed state of pneumatic valves A, D and E, and in the open state of pneumatic valves B, C and F), switch to the standby pressure reduction flow, and at the same time, an alarm appears at the system control end, reminding to repair the main flow.

[0073] The standby flow and the main flow have the same throttling pressure reduction function, and the pressure monitoring and remote transmission function are provided before and after the throttle valve. If the pressure difference before and after the throttle valve is less than 0.1 MPa, it means that the standby flow throttle valve is invalid, and the water-mixing work is stopped, and the water injection flow is switched back. Repair the whole flow at this time. The pneumatic valve D is opened, and the remaining pneumatic valves are in the closed state.

[0074] S3: establishing low-pressure zone unpowered recovery of casing gas;

[0075] In the embodiment of the present application, the establishing low-pressure zone unpowered recovery of casing gas comprises the steps of:

[0076] acquiring a water injection pipeline;

[0077] installing a check valve at an inlet of the water injection pipeline.

[0078] Specifically, as Figure 6 , in the process of high-pressure water in the water injection pipeline c passing through the conical throttle valve, the liquid flow before and after the valve becomes thin from thick, the dynamic pressure reaches the maximum value and the static pressure reaches the minimum value at the narrowest part of the conical nozzle, and the speed of the gas (liquid) rises because the cross-sectional area of the flow passage decreases. The entire gush flow experiences the process of pipeline narrowing at the same time, and thus the pressure decreases at the same time. Further, a pressure difference is generated, and a low-pressure (negative pressure) area is formed in the a1 area behind the nozzle, and the lower end a of the pipeline is connected to the sleeve. In order to prevent water from flowing back due to pressure fluctuation, a check valve is installed on the a pipeline, and the sleeve gas stored in the sleeve due to the pressure lower than the oil pressure is recovered to the low-pressure water injection pipeline by using the pressure difference between the sleeve pressure and the low-pressure area behind the nozzle, and then mixed with the low-pressure water to enter the b pipeline for water injection and viscosity reduction of the high-viscosity crude oil.

[0079] S4: optimizing the throttling parameters.

[0080] In the embodiments of the present application, the step of optimizing the throttling parameters comprises the steps of:

[0081] acquiring an oil pressure change value;

[0082] acquiring a dynamic liquid level change value;

[0083] adjusting the throttling pressure according to the oil pressure change value and the dynamic liquid level change value.

[0084] Specifically, according to the changes of the oil pressure and the dynamic liquid level in the production process, the water injection pressure and the sleeve gas recovery amount suitable for the production of the high-viscosity oil well are adjusted by adjusting the throttling pressure.

[0085] Embodiments

[0086] A certain heavy oil field has the following conditions: the viscosity of the crude oil at 50℃ is 13000 mPa·s, the condensation point is 25℃, the wellhead liquid temperature is 35℃, the daily oil production is 25 t / d, the daily liquid production is 38 m3 / d, the water content is 34.2%, the wellhead oil pressure is 0.8 MPa, and there is a certain amount of sleeve gas in the sleeve. The oil is produced by pumping. Because the viscosity of the crude oil is high, it cannot be directly transported, and there is no water injection pipeline around. The liquid is pumped into the overhead tank for oil production. However, there is a production water injection well 100 m away, and the water injection pressure is 13.8 MPa. Therefore, the process is reformed according to the high-viscosity crude oil gathering and transportation process method provided by the present application.

[0087] (1) The water injection pressure of the oil well is determined, k is 4 according to the production conditions of the surrounding wells. Therefore, the determined water injection pressure should be greater than or equal to 1.2 MPa.

[0088] (2) After the water injection pipeline is modified, the normal production is the main process, the pneumatic valves A, C and E are in the open state, the pneumatic valves B, C and F are in the closed state, the high-pressure water in the water injection pipeline C passes through the pneumatic valves C and A to enter the throttle valve, passes through the nozzle, the flow rate is fast, the pressure around the nozzle is reduced, a negative pressure area is formed, and the pressure is lower than that in the casing a, therefore, the casing gas stored in the casing a starts to migrate to the a1 area, is mixed with the low-pressure water behind the nozzle, enters the b pipe, and passes through the check valve to mix water for the gathering system.

[0089] When the throttle valve fails (the pressure difference before and after the throttle valve is 0.1 MPa), the pneumatic valves A, D and E are closed, and the pneumatic valves B, C and F are opened. The process is switched to the right side standby process, the standby process is the same as the main process, and at the same time of switching the standby process, the remote central control alarm system is triggered to remind the staff to maintain the main process.

[0090] When the pressure difference before and after the throttle valve of the main process and the standby process is less than 0.1 MPa at the same time, it is considered that the water mixing system is paralyzed, the pneumatic valve D is opened, the remaining pneumatic valves are closed, and the central control alarm is sent to remind the staff to maintain in time. The high-pressure water in the C pipe returns to the water injection system, the water mixing system stops running, and the oil well is switched back to the high-level tank oil production process.

[0091] Through the method, the high-viscosity crude oil gathering and associated gas unpowered collection of the oil well without a water mixing pipeline around are solved, and the annual pulling and transportation cost is reduced by 680,000 yuan.

[0092] As Figure 2 The application provides a high-viscosity crude oil gathering process device, which comprises:

[0093] A pressure determination module 10 is used for determining the water mixing pressure of the oil well.

[0094] A pressure adjustment module 20 is used for adjusting the water mixing pressure of the high-viscosity crude oil.

[0095] A casing gas establishment module 30 is used for establishing an unpowered recovered casing gas in a low-pressure area.

[0096] A parameter optimization module 40 is used for optimizing the throttle parameters.

[0097] The high-viscosity crude oil gathering process device provided by the application can execute the high-viscosity crude oil gathering process method provided by the above steps.

[0098] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

[0099] The following is for reference. Figure 3 The diagram illustrates a structural schematic of an electronic device 100 suitable for implementing embodiments of the present disclosure. The electronic devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 3 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.

[0100] like Figure 3 As shown, the electronic device 100 may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 102 or a program loaded from a storage device 108 into a random access memory (RAM) 103. The RAM 103 also stores various programs and data required for the operation of the electronic device 100. The processing unit 101, ROM 102, and RAM 103 are interconnected via a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0101] Typically, the following devices can be connected to I / O interface 105: input devices 106 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 107 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 108 including, for example, magnetic tapes, hard disks, etc.; and communication devices 109. Communication device 109 allows electronic device 100 to communicate wirelessly or wiredly with other devices to exchange data. Although electronic device 100 with various devices is shown in the figure, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0102] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from the network by the communication device 109, or installed from the storage device 108, or installed from the ROM 102. When the computer program is executed by the processing device 101, the above-mentioned functions defined in the methods of the embodiments of the present disclosure are executed.

[0103] Reference is made below to Figure 4 which shows a structural schematic diagram of a computer readable storage medium suitable for being used to implement the embodiments of the present disclosure, the computer readable storage medium storing a computer program, the computer program being executed by a processor to implement the high-viscosity crude oil gathering process method according to any one of the above-mentioned embodiments.

[0104] The high-viscosity crude oil gathering process method, device and storage medium provided by the embodiments of the present disclosure effectively solve the problems of high viscosity and large gathering resistance and waste of residual natural gas in the casing in the process of gathering high-viscosity crude oil with only a water injection pipeline matched with the wellhead, and can guide the construction of high-viscosity crude oil oilfield surface engineering.

[0105] It should be noted that, in this document, relational terms such as“first” and“second”, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by“comprises... a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0106] The above description is merely that of the specific embodiments of the present application, to enable a person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high viscosity crude oil gathering process method characterized by, The method comprises the steps of: determining the water-mixing pressure of high-viscosity crude oil in an oil well; adjusting the water-mixing pressure of high-viscosity crude oil; establishing casing gas in a low-pressure area for passive recovery; optimizing throttle parameters; The method comprises the steps of: obtaining wellhead back pressure of high-viscosity oil well; obtaining a water-mixing pressure calculation formula of the oil well; calculating the water-mixing pressure of high-viscosity crude oil in the oil well according to the wellhead back pressure of the high-viscosity oil well and the water-mixing pressure calculation formula of the oil well; The expression of the water-mixing pressure calculation formula of the oil well is: P 掺 ≥P 回 +k x 0.1 ; where P 掺 represents the water-doped pressure, P 回 represents the high-viscosity oil wellhead back pressure, k represents the safety factor; The method comprises the steps of: obtaining a high-pressure water injection system; configuring a throttle valve in the high-pressure water injection system, the throttle valve being a conical throttle valve, the side surface of the conical throttle valve being connected to a casing, a check valve being installed on the casing, and a water injection pipeline being installed at the bottom of the conical throttle valve; adjusting the opening degree of the throttle valve; The method comprises the steps of: obtaining a water injection pipeline; high-pressure water in the water injection pipeline flows out from the narrowest part of the conical nozzle of the conical throttle valve, a low-pressure area is formed after the narrowest part, and casing gas stored in the casing due to lower oil pressure is recovered to the low-pressure area by using the pressure difference between the casing pressure and the low-pressure area, and mixed with water to reduce the viscosity of high-viscosity crude oil by water-mixing; The method comprises the steps of: obtaining an oil pressure change value; obtaining a dynamic liquid level change value; adjusting the throttle pressure according to the oil pressure change value and the dynamic liquid level change value.

2. A high viscosity crude oil gathering installation characterized by, Comprise: a pressure determination module for determining the water-mixing pressure of high-viscosity crude oil in an oil well; a pressure adjustment module for adjusting the water-mixing pressure of high-viscosity crude oil; a casing gas establishment module for establishing casing gas in a low-pressure area for passive recovery; a parameter optimization module for optimizing throttle parameters; The method comprises the steps of: obtaining wellhead back pressure of high-viscosity oil well; obtaining a water-mixing pressure calculation formula of the oil well; calculating the water-mixing pressure of high-viscosity crude oil in the oil well according to the wellhead back pressure of the high-viscosity oil well and the water-mixing pressure calculation formula of the oil well; The expression of the water-mixing pressure calculation formula of the oil well is: P 掺 ≥P 回 +k x 0.1 ; where P 掺 represents the water-doped pressure, P 回 represents the high-viscosity oil wellhead back pressure, k represents the safety factor; The method comprises the steps of: obtaining a high-pressure water injection system; configuring a throttle valve in the high-pressure water injection system, the throttle valve being a conical throttle valve, the side surface of the conical throttle valve being connected to a casing, a check valve being installed on the casing, and a water injection pipeline being installed at the bottom of the conical throttle valve; adjusting the opening degree of the throttle valve; The method comprises the steps of: obtaining a water injection pipeline; high-pressure water in the water injection pipeline flows out from the narrowest part of the conical nozzle of the conical throttle valve, a low-pressure area is formed after the narrowest part, and casing gas stored in the casing due to lower oil pressure is recovered to the low-pressure area by using the pressure difference between the casing pressure and the low-pressure area, and mixed with water to reduce the viscosity of high-viscosity crude oil by water-mixing; The method comprises the steps of: obtaining an oil pressure change value; obtaining a dynamic liquid level change value; adjusting the throttle pressure according to the oil pressure change value and the dynamic liquid level change value.

3. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected in communication with the at least one processor; wherein The memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the high-viscosity crude oil gathering process method of claim 1.

4. A non-transitory computer-readable storage medium, comprising, The non-transitory computer-readable storage medium stores computer instructions for causing the computer to perform the high-viscosity crude oil gathering process method of claim 1.

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