Oil-water mixed fluid measuring instrument and oil-water mixed fluid measuring method

Abstract

The embodiment of the invention discloses an oil-water mixed fluid measuring instrument and an oil-water mixed fluid measuring method. The oil-water mixed fluid measuring instrument comprises an oil conveying pipeline, a static pressure bypass, a measuring bypass and a pressure measuring assembly. According to the oil-water mixed fluid measuring instrument provided by the embodiment of the invention, oil-water mixed circulation conveyed by the oil conveying pipeline can be sampled at any time, exploitation or production is not influenced in the sampling process, the oil-water ratio of the oil-water mixed circulation can be directly determined through the arrangement of the static pressure bypass and the pressure measuring assembly, and the detection efficiency is high.

Description

Technical Field

[0001] This application relates to the field of petrochemical technology, and in particular to an oil-water mixed fluid measuring instrument and a method for measuring oil-water mixed fluid. Background Technology

[0002] In the crude oil extraction and production process, the ratio of oil to water components reflects the characteristics of the oilfield reservoir and serves as data for improving production efficiency and optimizing extraction strategies. Many types of equipment exist for measuring oil and water composition, but traditional equipment is inconvenient for sampling, which can easily affect extraction or production efficiency and increase the workload of staff. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, a first aspect of the present invention provides an oil-water mixed fluid measuring instrument.

[0005] A second aspect of the present invention provides a method for measuring oil-water mixed fluids.

[0006] In view of this, a first aspect of the embodiments of this application provides an oil-water mixed fluid measuring instrument, comprising: Oil pipelines; A static pressure bypass includes a bend, a bypass pipe, and an injection port. One end of the bend is connected to the top of the oil pipeline, and the other end is connected to the bypass pipe. The injection port is located on the bypass pipe. A measurement bypass, comprising a bypass straight pipe and a valve, wherein one end of the bypass straight pipe is connected to the oil pipeline and the valve is located at the other end of the bypass straight pipe; A pressure measuring component is disposed on the bypass pipe and the bypass straight pipe.

[0007] In one feasible implementation, the oil pipeline includes: Oil inlet pipe; The first three-way valve, wherein the oil inlet pipe is connected to one of the passages of the first three-way valve; Elbow, the elbow being connected to another passage of the first tee, the elbow being disposed opposite to the oil inlet pipe; The bypass straight pipe is connected to another passage of the first tee, and the bend pipe is connected to the first tee and located at the top of the first tee.

[0008] In one feasible implementation, the static pressure bypass further includes: The second three-way valve has two passages that are respectively connected to the bend and the bypass pipe, and the other opening of the second three-way valve serves as the injection port.

[0009] In one feasible implementation, the pressure measuring component includes: A first differential pressure sensor is disposed at the top of a bypass pipe and a bypass straight pipe. The high-pressure mounting interface of the first differential pressure sensor is connected to the bypass straight pipe, and the low-pressure mounting interface of the first differential pressure sensor is connected to the bypass pipe. The second differential pressure sensor is disposed at the bottom of the bypass pipe and the bypass straight pipe. The high-pressure mounting interface of the second differential pressure sensor is connected to the bypass straight pipe, and the low-pressure mounting interface of the first differential pressure sensor is connected to the bypass pipe.

[0010] In one possible implementation, the diameter of the bypass pipe is smaller than the diameter of the bypass straight pipe.

[0011] In one feasible implementation, the injection port is located at the top of the oil inlet pipe.

[0012] According to a second aspect of the embodiments of this application, a method for measuring oil-water mixed fluids is provided, applied to an oil-water mixed fluid measuring instrument as described in any of the above technical solutions, the oil-water mixed fluid measuring method comprising: Inject contrast agent into the static bypass via the injection port. In response to a fluid transport command, an oil-water mixture is transported through a transport pipeline, and a sample of the oil-water mixture is retained through the measurement bypass. In response to a measurement command, the valve is closed, and the ratio of oil to water in the oil-water mixture sample is determined based on the measurement results of the pressure measuring component.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: The oil-water mixed fluid measuring instrument provided in this application includes an oil pipeline, a static pressure bypass, a measurement bypass, and a pressure measuring component. During use, the oil-water mixed fluid measuring instrument can be directly mounted on a production pipeline or an extraction pipeline. A contrast agent is first injected into the bypass pipe through the injection port on the static pressure pipeline. The density or oil-water ratio of the contrast agent is known. Then, the oil-water mixed fluid is transported through the oil pipeline. During transport, the oil-water mixture flows into the bypass straight pipe. A valve can control the opening and closing of the bypass straight pipe. During the transport of the oil-water mixture, the valve can be in the open state. When it is necessary to detect the oil-water ratio of the oil-water mixture, the valve can be closed. The bypass straight pipe can directly intercept the oil-water mixture currently being transported through the oil pipeline, completing the sampling operation. Then, based on the detection results of the differential pressure component, the oil-water ratio of the oil-water mixed fluid stored in the bypass straight pipe can be determined. Based on this, the oil-water mixed fluid measuring instrument provided in the embodiments of this application can sample the oil-water mixed flow transported through the oil pipeline at any time. The sampling process will not affect the mining or production. Furthermore, by setting up a static pressure bypass and pressure measuring components, the oil-water ratio in the oil-water mixed flow can be directly determined, resulting in high detection efficiency. Attached Figure Description

[0014] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic structural diagram of an oil-water mixed fluid measuring instrument according to an embodiment of this application, showing one angle. Figure 2 A schematic structural diagram of an oil-water mixed fluid measuring instrument according to an embodiment of this application from another angle; Figure 3 This is a schematic structural diagram of an oil-water mixed fluid measuring instrument according to an embodiment of this application, taken from another angle.

[0015] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Oil inlet pipe, 2. First tee, 3. Elbow, 4. Oil outlet, 5. Bypass straight pipe, 6. Valve, 7. Elbow, 8. First differential pressure sensor, 9. Bypass pipe, 10. Second differential pressure sensor, 11. Injection port. Detailed Implementation

[0016] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0017] like Figures 1 to 3 As shown, a first aspect of the embodiments of this application discloses an oil-water mixed fluid measuring instrument, comprising: an oil pipeline; a static pressure bypass, the static pressure bypass including a bend 7, a bypass pipe 9, and an injection port 11, one end of the bend 7 being connected to the top of the oil pipeline and the other end being connected to the bypass pipe 9, the injection port 11 being disposed on the bypass pipe 9; a measurement bypass, the measurement bypass including a bypass straight pipe 5 and a valve 6, one end of the bypass straight pipe 5 being connected to the oil pipeline and the valve 6 being disposed on the other end of the bypass straight pipe 5; and a pressure measuring assembly, the pressure measuring assembly being disposed on the bypass pipe 9 and the bypass straight pipe 5.

[0018] The oil-water mixed fluid measuring instrument provided in this application includes an oil pipeline, a static pressure bypass, a measurement bypass, and a pressure measuring component. During use, the oil-water mixed fluid measuring instrument can be directly installed on the production pipeline or the extraction pipeline. A comparison liquid can be injected into the bypass pipe 9 through the injection port 11 on the static pressure pipeline. The density or oil-water ratio of the comparison liquid is known. Then, the oil-water mixed fluid is transported through the oil pipeline. During the transportation process, the oil-water mixed flow will flow into the bypass straight pipe 5. The opening or closing of the bypass straight pipe 5 can be controlled by the valve 6. During the transportation of the oil-water mixed flow, the valve 6 can be in the open state. When it is necessary to detect the oil-water ratio of the oil-water mixture, the valve 6 can be closed. The bypass straight pipe 5 can directly intercept the oil-water mixed flow currently being transported through the oil pipeline to complete the sampling operation. Then, based on the detection results of the differential pressure component, the oil-water ratio of the oil-water mixed fluid stored in the bypass straight pipe 5 can be determined. Based on this, the oil-water mixed fluid measuring instrument provided in the embodiments of this application can sample the oil-water mixed flow transported through the oil pipeline at any time. The sampling process will not affect the mining or production. Furthermore, by setting up a static pressure bypass and pressure measuring components, the oil-water ratio in the oil-water mixed flow can be directly determined, resulting in high detection efficiency.

[0019] like Figures 1 to 3As shown, in one feasible embodiment, the oil pipeline includes: an oil inlet pipe 1; a first tee 2, the oil inlet pipe 1 being connected to one passage of the first tee 2; an elbow 3, the elbow 3 being connected to another passage of the first tee 2, the elbow 3 being disposed opposite to the oil inlet pipe 1, and an oil outlet 4 being formed on the elbow 3; wherein, the bypass straight pipe 5 is connected to another passage of the first tee 2, and the elbow 7 is connected to the first tee 2 and located at the top of the first tee 2.

[0020] In this technical solution, the structure of the oil pipeline is further provided. The oil pipeline may include an inlet pipe 1, a first tee 2 and an elbow 3. The elbow 3 allows the oil-water mixture to form a vortex when it is transported through the oil pipeline, which facilitates the transport of part of the oil-water mixture into the bypass straight pipe 5. The first tee 2 facilitates the assembly of the inlet pipe 1, the elbow 3 and the bypass straight pipe 5.

[0021] like Figures 1 to 3 As shown, in one feasible implementation, the static pressure bypass further includes a second three-way valve, the two passages of which are respectively connected to the bend 7 and the bypass pipe 9, and the other opening of the second three-way valve serves as the injection port 11.

[0022] In this technical solution, the static pressure bypass may also include a second tee, which facilitates the connection between the bypass pipe 9 and the bend pipe 7, and also facilitates the formation of the injection port 11.

[0023] like Figures 1 to 3 As shown, in one feasible embodiment, the pressure measuring assembly includes: a first differential pressure sensor 8, which is disposed at the top of the bypass pipe 9 and the bypass straight pipe 5, with the high-pressure mounting interface of the first differential pressure sensor 8 connected to the bypass straight pipe 5 and the low-pressure mounting interface of the first differential pressure sensor 8 connected to the bypass pipe 9; and a second differential pressure sensor 10, which is disposed at the bottom of the bypass pipe 9 and the bypass straight pipe 5, with the high-pressure mounting interface of the second differential pressure sensor 10 connected to the bypass straight pipe 5 and the low-pressure mounting interface of the first differential pressure sensor 8 connected to the bypass pipe 9.

[0024] In this technical solution, the structural composition of the pressure measuring component is further provided. The pressure measuring component may include a first differential pressure sensor 8 and a second differential pressure sensor 10. The pressure value and differential pressure value of the bypass pipe 9 and the bypass straight pipe 5 can be collected by the first differential pressure sensor 8 and the second differential pressure sensor 10. The oil-water ratio of the oil-water mixture can be determined by comparing it with the control liquid.

[0025] It is understandable that the specific method for determining the oil-water ratio is a publicly available prior art, and this application does not impose any restrictions.

[0026] like Figures 1 to 3 As shown, in one feasible embodiment, the diameter of the bypass pipe 9 is smaller than the diameter of the bypass straight pipe 5. This arrangement reduces the probability of oil-water mixed fluid being supplied into the bypass pipe 9.

[0027] In one feasible implementation, the injection port 11 is located at the top of the oil inlet pipe 1. This arrangement reduces the probability of oil-water mixture being supplied into the bypass pipe 9.

[0028] According to a second aspect of the embodiments of this application, a method for measuring oil-water mixed fluids is provided, applied to an oil-water mixed fluid measuring instrument as described in any of the above technical solutions, the oil-water mixed fluid measuring method comprising: A contrast agent is injected into the static pressure bypass through the injection port 11; In response to a fluid transport command, an oil-water mixture is transported through a transport pipeline, and a sample of the oil-water mixture is retained through the measurement bypass. In response to the measurement command, valve 6 is closed, and the ratio of oil to water in the oil-water mixture sample is determined based on the measurement results of the pressure measuring component.

[0029] The oil-water mixture measurement method provided in this application embodiment allows for the injection of a contrast agent into a bypass pipe 9 via the injection port 11 on the static pressure pipeline. The density or oil-water ratio of the contrast agent is known. The oil-water mixture is then transported through an oil pipeline. During the transport process, the oil-water mixture flows into the bypass straight pipe 5. The opening or closing of the bypass straight pipe 5 can be controlled by a valve 6. During the transport of the oil-water mixture, the valve 6 can be in the open state. When it is necessary to detect the oil-water ratio of the oil-water mixture, the valve 6 can be closed. The bypass straight pipe 5 can directly intercept the oil-water mixture currently being transported through the oil pipeline, completing the sampling operation. Then, based on the detection results of the differential pressure component, the oil-water ratio of the oil-water mixture stored in the bypass straight pipe 5 can be determined. Based on this, the oil-water mixed fluid measuring instrument provided in the embodiments of this application can sample the oil-water mixed flow transported through the oil pipeline at any time. The sampling process will not affect the mining or production. Furthermore, by setting up a static pressure bypass and pressure measuring components, the oil-water ratio in the oil-water mixed flow can be directly determined, resulting in high detection efficiency.

[0030] like Figure 1As shown, the oil-water mixture composition measuring instrument comprises four parts: an oil delivery pipeline, a measurement bypass, a static pressure bypass, and a sensor. The oil delivery pipeline includes an inlet pipe 1, a first tee 2, an elbow 3, and an outlet 4. The left side of the first tee 2 is connected to the inlet pipe 1, and the right side of the first tee 2 is sequentially connected to the elbow 3 and the outlet 4. The measurement bypass includes a bypass straight pipe and a valve 6. The lower part of the first tee 2 is connected to the bypass straight pipe, and a valve 6 is installed at the lower end of the bypass straight pipe. The static pressure bypass includes an elbow 7, a second tee, and a bypass pipe 9. A small hole is opened above the first tee 2 and connected to one end of the elbow 7. The other end of the elbow 7 is connected to the upper end of the second tee, and the lower end of the second tee is connected to the bypass pipe 9. The middle hole of the second tee is connected to the external water inlet pipe. A first differential pressure sensor 8 is installed above the parallel space between the bypass straight pipe and the bypass pipe 9, and a second differential pressure sensor 10 is installed below the parallel space between the bypass straight pipe and the bypass thin straight pipe. The high-pressure mounting interface of the second differential pressure sensor 10 is connected to the bypass straight pipe, and the low-pressure mounting interface of the second differential pressure sensor 10 is connected to the bypass pipe 9. The high-pressure mounting interface of the first differential pressure sensor 8 is connected to the bypass straight pipe, and the low-pressure mounting interface of the second differential pressure sensor 10 is connected to the bypass pipe 9. The position of the measuring hole of the second differential pressure sensor 10 should be within the envelope height range of the valve 6 pipe diameter. The position of the measuring hole of the first differential pressure sensor 8 is any position between the second differential pressure sensor 10 and the oil pipeline. The middle hole of the second tee is positioned higher than the top of the oil inlet pipe 1. Example 2

[0031] The difference between this embodiment and embodiment 1 is that the elbow 3 can be replaced with a straight pipe, and the valve 6 is directly installed at the lower end of the bypass straight pipe; It is understood that the oil-water mixed fluid measuring instrument provided in Embodiments 1 and 2 of this application can be installed and used in single wells or oil well measuring stations. Before use, a standard comparison fluid is injected through the injection port 11. When the standard comparison fluid overflows, the injection port 11 is closed. When not measuring, valve 6 is opened, and the oil-water mixed fluid enters the measuring instrument through the inlet pipe 1. It changes direction at the bend 3, forming a vortex. At the same time, due to gravity, a portion of the fluid preferentially flows through the bypass straight pipe, and the rest flows out of the measuring instrument through the outlet pipe along the bend 3. During measurement, valve 6 is closed, and a portion of the fluid flowing through the bypass straight pipe is retained in the bypass straight pipe as a sample to be tested. The oil and water composition ratio of the oil-water mixed fluid is obtained using the algorithm provided by the fluid composition measurement method of the invention patent (patent number ZL201910826895.7). This invention uses only a micro differential pressure sensor for measurement, has a simple structure, accurate measurement, is safe and reliable, and is easy to maintain. It can meet the composition measurement needs of various oil wells.

[0032] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil-water mixed fluid measuring instrument, characterized in that, include: Oil pipelines; A static pressure bypass includes a bend, a bypass pipe, and an injection port. One end of the bend is connected to the top of the oil pipeline, and the other end is connected to the bypass pipe. The injection port is located on the bypass pipe. A measurement bypass, comprising a bypass straight pipe and a valve, wherein one end of the bypass straight pipe is connected to the oil pipeline and the valve is located at the other end of the bypass straight pipe; A pressure measuring component is disposed on the bypass pipe and the bypass straight pipe.

2. The oil-water mixed fluid measuring instrument according to claim 1, characterized in that, The oil pipeline includes: Oil inlet pipe; The first three-way valve, wherein the oil inlet pipe is connected to one of the passages of the first three-way valve; Elbow, the elbow being connected to another passage of the first tee, the elbow being disposed opposite to the oil inlet pipe; The bypass straight pipe is connected to another passage of the first tee, and the bend pipe is connected to the first tee and located at the top of the first tee.

3. The oil-water mixed fluid measuring instrument according to claim 1, characterized in that, The static pressure bypass also includes: The second three-way valve has two passages that are respectively connected to the bend and the bypass pipe, and the other opening of the second three-way valve serves as the injection port.

4. The oil-water mixed fluid measuring instrument according to claim 1, characterized in that, The pressure measurement component includes: A first differential pressure sensor is disposed at the top of a bypass pipe and a bypass straight pipe. The high-pressure mounting interface of the first differential pressure sensor is connected to the bypass straight pipe, and the low-pressure mounting interface of the first differential pressure sensor is connected to the bypass pipe. The second differential pressure sensor is disposed at the bottom of the bypass pipe and the bypass straight pipe. The high-pressure mounting interface of the second differential pressure sensor is connected to the bypass straight pipe, and the low-pressure mounting interface of the first differential pressure sensor is connected to the bypass pipe.

5. The oil-water mixed fluid measuring instrument according to claim 1, characterized in that, The diameter of the bypass pipe is smaller than the diameter of the bypass straight pipe.

6. The oil-water mixed fluid measuring instrument according to claim 2, characterized in that, The injection port is located at the top of the oil inlet pipe.

7. A method for measuring oil-water mixed fluids, characterized in that, The oil-water mixed fluid measuring instrument as described in any one of claims 1 to 6, wherein the oil-water mixed fluid measuring method comprises: Inject contrast agent into the static bypass via the injection port. In response to a fluid transport command, an oil-water mixture is transported through a transport pipeline, and a sample of the oil-water mixture is retained through the measurement bypass. In response to a measurement command, the valve is closed, and the ratio of oil to water in the oil-water mixture sample is determined based on the measurement results of the pressure measuring component.

Images