Oil well production fluid storage device and storage method

Abstract

The application discloses an oil well produced liquid storage device, which comprises a tank body, a first partition plate and a second partition plate, a first pair of limiters and a second pair of limiters, and a method for storing oil well produced liquid. The tank body is a horizontal storage tank. The first partition plate and the second partition plate divide the tank body into three cavities which are not communicated with each other. The first partition plate and the second partition plate are moved along the horizontal direction to change the volume of the three cavities. The three cavities are respectively provided with a feeding port and a discharging port. The first pair of limiters and the second pair of limiters are respectively arranged on the two sides of the first partition plate and the second partition plate. The positions of the two pairs of limiters can be adjusted. The application can be applied to the storage of oil well produced liquid in remote oil fields. The three cavities which are not communicated with each other and have adjustable volume can store sewage, crude oil and gas separated from the oil well produced liquid at the same time, and the oil well produced liquid can be timely transported and treated, thereby reducing the transportation process of the oil well produced liquid into the overhead tank and then into the tank car, reducing the intermediate loss and the leakage risk, and reducing the energy consumption without the need of a heating device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield exploitation, and particularly relates to an oil well produced liquid storage device and a storage method for remote oilfields. BACKGROUND

[0002] Due to the remote geographical location, the produced liquid of a remote well in an oilfield cannot enter the oilfield production pipeline process, and therefore a high tank is usually used for temporary storage of the produced liquid, and a truck is used for transportation after a certain amount of production is reached. In the whole process, in order to ensure the fluidity of the crude oil, the high tank usually needs to be heated and insulated, which consumes a large amount of heat energy. In addition, the high tank has poor sealing performance, and toxic and harmful gases in the crude oil are easy to volatilize, causing environmental pollution. At the same time, there are also problems of crude oil leakage, component volatilization and other production safety problems during the storage of the high tank and during the loading and unloading of the truck. In addition, in order to ensure the safety of the heating system of the high tank and the whole production process, oil workers need to regularly conduct site inspection and safety inspection of the oil storage tank, which increases the labor intensity of the workers. The existing problems affect the realization of the "double carbon" goal of the oilfield, and improvement is urgently needed.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present application and should not be taken as an acknowledgment or any form of suggestion that this information forms prior art that is publicly known. SUMMARY

[0004] One of the purposes of the present application is to provide an oil well produced liquid storage device and a storage method, so as to improve the problems of large energy consumption and insufficient sealing performance when the high tank is used for temporary storage of the oil well produced liquid of a remote oilfield in the prior art.

[0005] Another purpose of the present application is to provide an oil well produced liquid storage device and a storage method, so as to improve the safety problems of crude oil leakage and component volatilization caused in the storage and transportation process of the oil well produced liquid of a remote oilfield in the prior art.

[0006] To achieve the above-mentioned purposes, according to a first aspect of the present application, an oil well produced liquid storage device is provided, comprising: a tank body, which is a horizontal storage tank; a first partition plate and a second partition plate, which divide the tank body into three cavities that are not connected to each other, the first partition plate and the second partition plate move along the horizontal direction to change the volumes of the three cavities, the three cavities are respectively provided with an inlet and an outlet; and two pairs of limiters, which are respectively arranged on the two sides of the first partition plate and the second partition plate, the positions of the two pairs of limiters can be adjusted.

[0007] Further, in the above technical solution, the three cavities are respectively a sewage cavity, a crude oil cavity and a gas cavity, the crude oil cavity is located in the middle, and the inlets of the three cavities are respectively connected to the sewage, the crude oil and the gas after separation of the oil well produced liquid.

[0008] Further, in the above technical solution, the first and second partitions move between the respective limiters under the action of the pressure difference between adjacent cavities, the first partition separates the gas cavity and the crude oil cavity, and the second partition separates the crude oil cavity and the sewage cavity.

[0009] Further, in the above technical solution, when the daily gas production volume V 气 of the oil well produced liquid is less than or equal to the tank volume V 罐 , the position of the limiter of the first partition is set so that the volume V C of the gas cavity satisfies V 气 / 3≤V C ≤V 罐 / 3; when the daily gas production volume V 气 of the oil well produced liquid is greater than the tank volume V 罐 , the position of the limiter of the first partition is set so that the volume V C of the gas cavity satisfies V 罐 / 3≤V C ≤V 气 / 3; and when the daily sewage production volume V 水 of the oil well produced liquid is greater than the daily oil production volume V 油 , the position of the limiter of the second partition is set so that the volume V A of the sewage cavity satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2; when the daily sewage production volume V 水 of the oil well produced liquid is less than or equal to the daily oil production volume V 油 , the position of the limiter of the second partition is set so that the volume V A of the sewage cavity satisfies V 罐 / 3-(V 油 -V 水 ) / 2≤V A ≤V 罐 / 3.

[0010] Further, in the above technical solution, the sewage cavity and the crude oil cavity are respectively provided with a liquid level alarm, and the gas cavity is provided with a pressure alarm.

[0011] Further, in the above technical solution, the liquid level threshold of the liquid level alarm is 3 / 4 of the diameter of the tank, and the pressure threshold of the pressure alarm is 0.3MPa-0.4MPa.

[0012] Further, in the above technical solution, the volume of the tank is 15m 3 -20m 3 , and the maximum pressure bearing of the tank is 0.8MPa.

[0013] Further, in the technical solution, the oil well produced liquid storage device further comprises a guide rail arranged in the horizontal direction in the tank body, the first partition plate and the second partition plate move along the guide rail, and two pairs of limiters are arranged on the guide rail.

[0014] Further, in the technical solution, the feed inlets of the three cavities are provided with independent control switches.

[0015] Further, in the technical solution, the oil well produced liquid storage device further comprises a base for vehicle transportation, and the tank body is arranged on the base.

[0016] Further, in the technical solution, the tank body is externally provided with a heat preservation layer.

[0017] According to the second aspect of the present application, the present application provides an oil well produced liquid storage method using the oil well produced liquid storage device according to any one of the above technical solutions, comprising the following steps: adjusting the initial positions of the first partition plate and the second partition plate so that the volumes of the three cavities are equal; adjusting the position of the limiter of the first partition plate according to the daily gas production volume V 气 and the tank volume V 罐 ; and adjusting the position of the limiter of the second partition plate according to the daily sewage production volume V 水 and the daily oil production volume V 油 .

[0018] Further, in the technical solution, when the daily gas production volume V 气 of the oil well produced liquid is less than or equal to the tank volume V 罐 , the position of the limiter of the first partition plate is adjusted so that the volume V C of the gas cavity satisfies V 气 / 3≤V C ≤V 罐 / 3; when the daily gas production volume V 气 of the oil well produced liquid is greater than the tank volume V 罐 , the position of the limiter of the first partition plate is adjusted so that the volume V C of the gas cavity satisfies V 罐 / 3≤V C ≤V 气 / 3; and when the daily sewage production volume V 水 of the oil well produced liquid is greater than the daily oil production volume V 油 , the position of the limiter of the second partition plate is adjusted so that the volume V A of the sewage cavity satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2; when the daily sewage production volume V 水Less than or equal to the daily oil production volume V 油 When the volume V of the sewage cavity is less than or equal to the daily oil production volume V, the position of the stopper of the second partition is adjusted, so that the volume V of the sewage cavity is greater than the daily oil production volume V A Satisfies V 罐 / 3-(V 油 -V 水 ) / 2≤V A ≤V 罐 / 3.

[0019] Further, in the above technical solution, the oil well produced liquid storage method further comprises: monitoring the liquid level of the sewage cavity and the crude oil cavity, and monitoring the pressure of the gas cavity; when the liquid level of the sewage cavity reaches the liquid level threshold, closing the feed port of the sewage cavity; when the liquid level of the crude oil cavity reaches the liquid level threshold, closing the feed port of the crude oil cavity; and when the pressure of the gas cavity reaches the pressure threshold, closing the feed port of the gas cavity.

[0020] Further, in the above technical solution, the liquid level threshold of the sewage cavity and the crude oil cavity is 3 / 4 of the diameter of the tank body, and the pressure threshold of the gas cavity is 0.3MPa-0.4MPa.

[0021] Compared with the prior art, the present application has one or more of the following beneficial effects:

[0022] 1. The present application is applied to the storage of oil well produced liquid in remote oil fields. By setting three cavities that are not connected to each other and have adjustable volumes, sewage, crude oil and gas separated from the oil well produced liquid can be stored at the same time, and timely pulling and transporting treatment is carried out, reducing the transfer process of the produced liquid into the elevated tank and then into the tank car, and reducing the intermediate loss.

[0023] 2. The partition of the present application can move, thereby automatically adjusting the pressure balance through the pressure difference between different cavities, increasing the safety of storage; the stopper of the partition can be adjusted according to the daily production of the oil well produced liquid, thereby increasing the applicability.

[0024] 3. The storage and pulling process of the present application is a closed process without open links, avoiding the volatilization of toxic and harmful gases in the produced liquid and the leakage risk of crude oil and sewage, reducing environmental pollution.

[0025] 4. Since the oil well produced liquid itself has a relatively high temperature, which can reach 40-70℃, and the liquid is stored in the tank body of the present application for a relatively short time, generally not more than 24 hours, combined with the fact that a certain heat preservation layer can be provided outside the tank body, the heating process can be avoided, energy consumption is reduced, and good economic benefits and environmental protection effects are achieved.

[0026] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application clearer and can be implemented according to the content of the specification, and at the same time, in order to make the above and other purposes, technical features and advantages of the present application more easily understood, one or more preferred embodiments are listed below and are described in detail as follows with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of an oil well produced fluid storage device according to an embodiment of the present application.

[0028] MAIN REFERENCE NUMERALS EXPLANATION

[0029] 10 - tank body, 11 - gas cavity, 111 - inlet, 112 - outlet, 113 - pressure alarm, 114 - safety valve, 12 - crude oil cavity, 121 - inlet, 122 - outlet, 123 - liquid level alarm, 124 - safety valve, 13 - sewage cavity, 131 - inlet, 132 - outlet, 133 - liquid level alarm, 134 - safety valve, 21 - first partition, 211 - first limiter, 212 - second limiter, 22 - second partition, 221 - third limiter, 222 - fourth limiter, 30 - guide rail, 40 - base. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application are described in detail below with reference to the drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiments.

[0031] Unless otherwise explicitly stated, throughout the specification and claims, the term "comprise" or variations such as "comprises" or "comprising" will be understood to imply the inclusion of a stated element or component, but not the exclusion of other elements or components.

[0032] In this document, spatially relative terms, such as "under", "below", "lower", "over", "upper", "above", and the like, can be used to describe one element's or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientations depicted in the figures. For example, if an object in the figures is turned over, then a downwardly facing surface would then be oriented upwardly. Thus, the exemplary term "below" can encompass both an orientation of below and above. The object can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly. The terms "first", "second", and the like, do not necessarily denote any order or importance, but are used to distinguish one element from another.

[0033] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0034] like Figure 1 As shown, the oil well produced fluid storage device according to a specific embodiment of the present invention includes a tank 10, which is a horizontal storage tank. A first partition 21 and a second partition 22 are provided in the tank 10, dividing the tank 10 into three non-communicating chambers. The first partition 21 and the second partition 22 can move horizontally to change the volume of the three chambers. Two pairs of limiters are provided: a first limiter 211 and a second limiter 212 are provided on both sides of the first partition 21; a third limiter 221 and a fourth limiter 222 are provided on both sides of the second partition 22. The positions of each limiter are adjustable, thereby limiting the maximum movement position of the first partition 21 and the second partition 22. Further, in one or more exemplary embodiments of the present invention, the three chambers are a wastewater chamber 13, an crude oil chamber 12, and a gas chamber 11, with the crude oil chamber 12 located in the middle. The inlet 111 of the gas chamber 11, the inlet 121 of the crude oil chamber 12, and the inlet 131 of the wastewater chamber 13 are respectively connected to the gas, crude oil, and wastewater after separation of the produced fluid from the oil well. Exemplarily, the gas chamber 11 is provided with an outlet 112 and a safety valve 114, the crude oil chamber 12 is provided with an outlet 122 and a safety valve 124, and the wastewater chamber 13 is provided with an outlet 132 and a safety valve 134. Exemplarily, the tank body 10 is provided with an external insulation layer (not shown in the figure).

[0035] Furthermore, in one or more exemplary embodiments of the present invention, a first partition 21 separates the gas chamber 11 and the crude oil chamber 12. The first partition 21 can move between a first limiter 211 and a second limiter 212 under the pressure difference between the gas chamber 11 and the crude oil chamber 12. A second partition 22 separates the crude oil chamber 12 and the sewage chamber 13. The second partition 22 can move between a third limiter 221 and a fourth limiter 222 under the pressure difference between the crude oil chamber 12 and the sewage chamber 13, thereby ensuring pressure balance between different media and keeping the tank 10 in a state of basic pressure balance. Exemplarily, a guide rail 30 is provided inside the tank 10, which is arranged horizontally within the tank 10. The first partition 21 and the second partition 22 can move along the guide rail 30, and the limiters are arranged on the guide rail 30. Figure 1 The diagram shows an optional form of the guide rail 30, in which guide rails are respectively provided at the upper and lower ends of the first partition 21 and the second partition 22. It should be understood that the present invention is not limited thereto. The guide rails of the first partition 21 and the second partition 22 can also be interconnected, or the guide rails can be provided only at the bottom of the tank body 10. Those skilled in the art can select the setting of the guide rails according to actual needs to achieve the guidance of the partitions and also ensure sealing.

[0036] Further, in one or more exemplary embodiments of the present application, according to the daily gas volume V 气 , the daily sewage volume V 水 and the daily oil volume V 油 of the oil well produced fluid, the positions of the limiters are set as follows:

[0037] When the daily gas volume V 气 of the oil well produced fluid is less than or equal to the volume V 罐 of the tank body 10, the positions of the first limiter 211 and the second limiter 212 of the first partition plate 21 are set so that the volume V C of the gas cavity 11 satisfies V 气 / 3≤V C ≤V 罐 / 3, i.e. when the first partition plate 21 abuts against the first limiter 211, the volume V C of the gas cavity 11 is V 气 / 3, and when the first partition plate 21 abuts against the second limiter 212, the volume V C of the gas cavity 11 is V 罐 / 3;

[0038] When the daily gas volume V 气 of the oil well produced fluid is greater than the volume V 罐 of the tank body, the positions of the limiters of the first partition plate are set so that the volume V C of the gas cavity satisfies V 罐 / 3≤V C ≤V 气 / 3, i.e. when the first partition plate 21 abuts against the first limiter 211, the volume V C of the gas cavity 11 is V 罐 / 3, and when the first partition plate 21 abuts against the second limiter 212, the volume V C of the gas cavity 11 is V 气 / 3;

[0039] When the daily sewage volume V 水 of the oil well produced fluid is greater than the daily oil volume V 油 , the positions of the limiters of the second partition plate are set so that the volume V A of the sewage cavity satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2, i.e. when the second partition plate 22 abuts against the fourth limiter 222, the volume V A of the sewage cavity 13 is V 罐 / 3, and when the second partition plate 22 abuts against the third limiter 221, the volume V A of the sewage cavity 13 is V罐 / 3+(V 水 -V 油 ) / 2;

[0040] When the daily sewage volume V 水 of the oil well produced fluid is less than or equal to the daily oil volume V 油 , the position of the limiter of the second partition is set so that the volume V A of the sewage cavity satisfies V 罐 / 3-(V 油 -V 水 ) / 2≤V A ≤V 罐 / 3, that is, when the second partition 22 abuts against the fourth limiter 222, the volume V A of the sewage cavity 13 is V 罐 / 3-(V 油 -V 水 ) / 2, and when the second partition 22 abuts against the third limiter 221, the volume V A of the sewage cavity 13 is V 罐 / 3.

[0041] Further, in one or more exemplary embodiments of the present application, the sewage cavity 13 is provided with a liquid level alarm 133, and the crude oil cavity 12 is provided with a liquid level alarm 123. Exemplarily, the liquid level threshold values of the liquid level alarm 133 and the liquid level alarm 123 can be set to be the same, for example, the liquid level threshold value is 3 / 4 of the diameter of the tank 10, and the present application is not limited thereto. The gas cavity 11 is provided with a pressure alarm 113, and the pressure threshold value of the pressure alarm 113 can be 0.3 MPa to 0.4 MPa. Further, in one or more exemplary embodiments of the present application, the feed inlet 111 of the gas cavity 11, the feed inlet 121 of the crude oil cavity 12, and the feed inlet 131 of the sewage cavity 13 are respectively provided with independent control switches (not shown in the figure), and when a cavity in the three cavities reaches an alarm value, the feed inlet of the cavity can be correspondingly closed, and after the other cavities also reach the preset alarm value, the tank 10 is subjected to a pulling operation, thereby maximizing the tank car pulling capacity.

[0042] Further, in one or more exemplary embodiments of the present application, the volume of the tank 10 can be 15m 3 ~20m 3 , which is suitable for general remote oil well produced fluid and can ensure that the tank 10 is filled and transported within a certain time without the need for a heating device. The maximum pressure bearing of the tank 10 can be 0.8 MPa.

[0043] Further, in one or more exemplary embodiments of the present application, the tank 10 can be installed on a base 40, and the base 40 is movable and is integrally transported by a special vehicle.

[0044] The oil well produced fluid storage method according to the specific embodiment of the present application adopts the oil well produced fluid storage device according to any one of the technical solutions above. Referring to Figure 1 The oil well produced fluid storage method includes the following steps: adjusting the initial positions of the first partition plate 21 and the second partition plate 22 so that the volumes of the three cavities are equal; adjusting the positions of the first stopper 211 and the second stopper 212 of the first partition plate 21 according to the daily gas production volume V 气 and the tank volume V 罐 ; and adjusting the positions of the third stopper 221 and the fourth stopper 222 of the second partition plate 22 according to the daily produced sewage volume V 水 and the daily oil production volume V 油 .

[0045] Further, in one or more exemplary embodiments of the present application, when the daily gas production volume V 气 of the oil well produced fluid is less than or equal to the tank volume V 罐 , the positions of the first stopper 211 and the second stopper 212 of the first partition plate 21 are adjusted so that the volume V C of the gas cavity 11 satisfies V 气 / 3≤V C ≤V 罐 / 3; when the daily gas production volume V 气 of the oil well produced fluid is greater than the tank volume V 罐 , the positions of the first stopper 211 and the second stopper 212 of the first partition plate 21 are adjusted so that the volume V C of the gas cavity 11 satisfies V 罐 / 3≤V C ≤V 气 / 3; and when the daily produced sewage volume V 水 of the oil well produced fluid is greater than the daily oil production volume V 油 , the positions of the third stopper 221 and the fourth stopper 222 of the second partition plate 22 are adjusted so that the volume V A of the sewage cavity 13 satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2; when the daily produced sewage volume V 水 of the oil well produced fluid is less than or equal to the daily oil production volume V 油 , the positions of the third stopper 221 and the fourth stopper 222 of the second partition plate 22 are adjusted so that the volume V A of the sewage cavity 13 satisfies V 罐 / 3-(V 油 -V 水) / 2≤V A ≤V 罐 / 3。

[0046] Further, in one or more exemplary embodiments of the present application, before adjusting the position of each position limiter, the first partition 21 and the second partition 22 and their respective position limiters can be first set at a position where the three cavities are equally divided, and then according to the daily gas volume V 气 , the daily sewage volume V 水 and the daily oil volume V 油 of the oil well produced fluid, only the position of one position limiter of each partition needs to be adjusted, however, it should be understood that the present application is not limited thereto.

[0047] Further, in the above technical solution, the oil well produced fluid storage method further comprises: monitoring the liquid level of the sewage cavity and the crude oil cavity, and monitoring the pressure of the gas cavity; when the liquid level of the sewage cavity reaches a liquid level threshold, closing the feed inlet of the sewage cavity; when the liquid level of the crude oil cavity reaches a liquid level threshold, closing the feed inlet of the crude oil cavity; and when the pressure of the gas cavity reaches a pressure threshold, closing the feed inlet of the gas cavity.

[0048] Further, in the above technical solution, the liquid level threshold of the sewage cavity and the crude oil cavity is 3 / 4 of the diameter of the tank body, and the pressure threshold of the gas cavity is 0.3MPa-0.4MPa.

[0049] The oil well produced fluid storage device and the storage method of the present application will be described in more detail in the form of specific embodiments, it should be understood that the embodiments are exemplary only, and the present application is not limited thereto.

[0050] Embodiment 1

[0051] This embodiment uses a horizontal storage tank as the tank body 10 of the oil well produced fluid storage device as shown in Figure 1 , and the volume V 罐 is 15m 3 .

[0052] The oil well produced fluid storage device of this embodiment is used for storing oil well produced fluid in a remote oil field, and the daily gas volume V 气 , the daily sewage volume V 水 and the daily oil volume V 油 of the oil well produced fluid are 9m 3 , 5m 3 , and 7m 3 respectively. Before use, the initial positions of the first partition 21 and the second partition 22 are adjusted so that the volumes of the three cavities are equal, and then according to the daily gas volume V 气 and the tank volume V 罐 , only the position of one position limiter of each partition needs to be adjusted., the positions of the first stopper 211 and the second stopper 212 of the first partition plate 21 are adjusted so that the volume V C satisfies 3m 3 ≤V C ≤5m 3 ; and according to the daily sewage volume V 水 and the daily oil volume V 油 of the oil well produced fluid, the positions of the third stopper 221 and the fourth stopper 222 of the second partition plate 22 are adjusted so that the volume V A satisfies 4m 3 ≤V A ≤5m 3 . The feed inlets of the three cavities are respectively connected with the sewage, the crude oil and the gas separated from the oil well produced fluid, and the storage is started. The liquid levels of the sewage cavity and the crude oil cavity are monitored, and the pressure of the gas cavity is monitored, and when a cavity in the three cavities reaches a liquid level threshold or a pressure threshold, the feed inlet of the cavity is closed accordingly, and after the other cavities also reach the preset alarm value, the whole tank 10 is transported for treatment.

[0053] The oil well produced fluid is stored in the oil well produced fluid storage device of the embodiment for only about 22 hours, without the need for additional heating devices, reducing energy consumption, and the whole storage and transportation process is a closed process, avoiding the risk of leakage and reducing environmental pollution.

[0054] The foregoing description of specific exemplary embodiments of the application is intended to be illustrative only and is not intended to limit the application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the application. The exemplary embodiments were chosen and described in order to explain the principles of the application and its practical application and to allow others skilled in the art to understand the application for various exemplary embodiments and its various modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes, and modifications based on the exemplary embodiments described above should fall within the scope of the application.

Claims

1. An oil well production fluid storage device, characterized by, The utility model relates to a kind of temporary storage for oilfield remote oil well produced fluid, comprising: Tank body, which is horizontal storage tank; First partition and second partition, which divide the tank body into three cavities not communicated with each other, the first partition and the second partition move along the horizontal direction to change the volume of the three cavities, the three cavities are respectively provided with inlet and outlet; The three cavities are sewage cavity, crude oil cavity and gas cavity respectively, the crude oil cavity is located in the middle, and the inlets of the three cavities are respectively connected with sewage, crude oil and gas after oil well produced fluid separation; The sewage cavity and the crude oil cavity are respectively provided with liquid level alarm, and the gas cavity is provided with pressure alarm; The inlets of the three cavities are provided with independent control switch; And Two pairs of limiters are respectively arranged on both sides of the first partition and the second partition, the positions of the two pairs of limiters can be adjusted; The first partition and the second partition move between their limiters under the action of pressure difference of adjacent cavities, the first partition separates the gas cavity and the crude oil cavity, and the second partition separates the crude oil cavity and the sewage cavity; When the daily gas production volume V 气 of the oil well produced fluid is less than or equal to the tank volume V 罐 , the position of the limiter of the first partition is set so that the volume V C of the gas cavity satisfies V 气 / 3≤V C ≤V 罐 / 3; and when the daily gas production volume V 气 of the oil well produced fluid is greater than the tank volume V 罐 , the position of the limiter of the first partition is set so that the volume V C of the gas cavity satisfies V 罐 / 3≤V C ≤V 气 / 3. When the daily produced sewage volume V 水 of the oil well produced fluid is greater than the daily produced oil volume V 油 , the position of the limiter of the second partition is set so that the volume V A of the sewage cavity satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2; when the daily produced sewage volume V 水 of the oil well produced fluid is less than or equal to the daily produced oil volume V 油 , the position of the limiter of the second partition is set so that the volume V A of the sewage cavity satisfies V 罐 / 3-(V 油 -V 水 ) / 2≤V A ≤V 罐 / 3.

2. The oil well production fluid storage apparatus of claim 1, wherein, The liquid level threshold of the liquid level alarm is 3 / 4 of the diameter of the tank body, and the pressure threshold of the pressure alarm is 0.3MPa-0.4MPa.

3. The oil well effluent storage device of claim 1, wherein, The volume of the tank body is 15m 3 ~ 20m 3 The maximum pressure of the tank body is 0.8MPa.

4. The oil well effluent storage device of claim 1, wherein, Further comprising: Guide rail is arranged in the tank body along the horizontal direction, the first partition and the second partition move along the guide rail, and the two pairs of limiters are arranged on the guide rail.

5. The oil well effluent storage device of claim 1, wherein, Further comprising: Base for vehicle transportation, the tank body is arranged on the base.

6. The oil well effluent storage device of claim 1, wherein, The tank body is provided with an insulating layer outside.

7. An oil well produced fluid storage method employing the oil well produced fluid storage device according to any one of claims 1 to 6, characterized by, Comprising the following steps: Adjust the initial position of the first partition and the second partition so that the volume of the three cavities is equal; According to the volume of gas produced daily V 气 and the volume of the tank V 罐 , adjusting the position of the stopper of the first partition; and According to the daily produced sewage volume V of the oil well produced fluid 水 and the daily produced oil volume V 油 , the position of the limiter of the second partition is adjusted.

8. The oil well effluent storage method of claim 7, wherein, when the daily gas production volume V 气 of the oil well produced fluid is less than or equal to the tank volume V 罐 , the position of the stopper of the first partition is adjusted so that the volume V C of the gas cavity satisfies V 气 / 3≤V C ≤V 罐 / 3; and when the daily gas production volume V 气 of the oil well produced fluid is greater than the tank volume V 罐 , the position of the stopper of the first partition is adjusted so that the volume V C of the gas cavity satisfies V 罐 / 3≤V C ≤V 气 / 3. when the daily volume of produced water V 水 of the oil well is greater than the daily volume of produced oil V 油 , the position of the limiter of the second partition is adjusted so that the volume V A of the produced water chamber satisfies V 罐 / 3≤V A ≤V 罐 / 3+(V 水 -V 油 ) / 2; when the daily volume of produced water V 水 of the oil well is less than or equal to the daily volume of produced oil V 油 , the position of the limiter of the second partition is adjusted so that the volume V A of the produced water chamber satisfies V 罐 / 3-(V 油 -V 水 ) / 2≤V A ≤V 罐 / 3.

9. The oil well effluent storage method of claim 8, wherein, Further comprising: Monitor the liquid level of the sewage cavity and the crude oil cavity, and monitor the pressure of the gas cavity; When the liquid level of the sewage cavity reaches the liquid level threshold, close the inlet of the sewage cavity; When the liquid level of the crude oil cavity reaches the liquid level threshold, close the inlet of the crude oil cavity; And When the pressure of the gas cavity reaches the pressure threshold, close the inlet of the gas cavity.

10. The oil well effluent storage method of claim 9, wherein, The liquid level threshold of the sewage cavity and the crude oil cavity is 3 / 4 of the diameter of the tank body, and the pressure threshold of the gas cavity is 0.3MPa-0.4MPa.

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