An oil water content measuring device

Abstract

The utility model discloses an oil water content measuring device relates to oilfield high water content and low water content fluid measurement field, including main stream pipe and flow computer, the main stream pipe both ends are equipped with fluid inlet and fluid outlet respectively, be equipped with electric three -way valve on the main stream pipe, two outlets of electric three -way valve are connected with the main stream pipe respectively, and another outlet is equipped with measuring assembly, the top of measuring assembly is equipped with the oil water content measuring instrument of insertion rod type, a plurality of microwave probes are equipped in the rod of insertion rod type oil water content measuring instrument, the outer surface of measuring assembly is equipped with electric heat -tracing band, be equipped with the connecting pipe of one end communication with it on measuring assembly, the other end of connecting pipe is connected with the main stream pipe between electric three -way valve and fluid outlet, electric three -way valve and insertion rod type oil water content measuring instrument are connected with flow computer respectively. The utility model discloses can effectively measure the oil content of oil -water mixed fluid through the adjustment of different measuring pipe diameter.

Description

Technical Field

[0001] This utility model belongs to the field of oilfield high water cut and low water cut fluid measurement, specifically relating to an oil water cut measurement device. Background Technology

[0002] In oil and gas field development, oil-water mixtures are involved in multiphase flow metering at every stage from the wellhead to the crude oil processing station, requiring increasingly higher accuracy in measuring oil and water flow rates. Currently, in both onshore and offshore oil and gas fields, the water content in the liquid phase oil is rising, with many oils exceeding 90%, especially in older oil fields where it is generally between 92% and 99%. In upstream oil and gas processes, there are numerous oil-water cut measurement points. Due to the requirement for low-cost extraction and operation, oil-water cut measuring instruments employ a low-price strategy and high cost-effectiveness, resulting in an accuracy of only 2%. For high or ultra-high oil-water cut wells, this leads to a very large measurement error, rendering the measurement meaningless. For example, a 2% accuracy oil-water cut measuring device might only measure 2% oil when the oil-water content is 98%, resulting in a 100% uncertainty or relative error in oil content measurement, which is completely unacceptable to oil companies.

[0003] Currently, technologies used for measuring water cut in upstream oil and gas production both domestically and internationally include X-ray absorption method, microwave method, rod-type multi-probe microwave static measurement method, radio frequency admittance method, capacitance method, and density method. These technologies, when used to calculate pure crude oil volume by measuring high water cut data online, suffer from very large relative errors and cannot meet the requirements of oilfields. Currently, there is no product that simultaneously meets the requirements for upstream water cut measurement and offers the best cost-effectiveness. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing an oil-water content measuring device. The device uses an insertion rod type oil-water content measuring instrument as the measuring device. By adjusting the diameter ratio of different measuring tubes, the oil height in the measuring tube with a smaller diameter can be increased, which can effectively improve the accuracy of measuring the oil content of oil-water mixtures.

[0005] The technical solution adopted by this utility model is as follows: an oil water content measuring device, including a main flow pipe and a flow computer. The main flow pipe has a fluid inlet and a fluid outlet at both ends. An electric three-way valve is provided on the main flow pipe. Two outlets of the electric three-way valve are connected to the main flow pipe. A measuring component is provided on the other outlet of the electric three-way valve. An insertion rod type oil water content measuring instrument is provided on the top of the measuring component. Several microwave probes are provided inside the rod of the insertion rod type oil water content measuring instrument. An electric heating tape is provided on the outer surface of the measuring component. A connecting pipe is provided on the measuring component, with one end connected to it. The other end of the connecting pipe is connected to the main flow pipe located between the electric three-way valve and the fluid outlet. The electric three-way valve and the insertion rod type oil water content measuring instrument are respectively connected to the flow computer.

[0006] In one embodiment, the measuring assembly includes measuring tube one, measuring tube two, and measuring tube three arranged from top to bottom and connected to each other. The diameter of measuring tube two is larger than the diameters of measuring tube one and measuring tube three. The insertion rod type oil-water content measuring instrument is located at the top of measuring tube one, and one end of the connecting tube is connected to measuring tube one.

[0007] In one embodiment, the measuring assembly includes a measuring tube 1 and a measuring tube 2 arranged from top to bottom and connected to each other. The diameter of the measuring tube 1 is smaller than the diameter of the measuring tube 2. The insertion rod type oil-water content measuring instrument is disposed at the top of the measuring tube 1, and one end of the connecting tube is connected to the measuring tube 1.

[0008] In one embodiment, the measuring assembly includes a measuring tube 1 and a measuring tube 2 arranged from top to bottom and connected to each other. The diameter of the measuring tube 1 is larger than the diameter of the measuring tube 2. The insertion rod type oil-water content measuring instrument is disposed at the top of the measuring tube 1, and one end of the connecting tube is connected to the measuring tube 1.

[0009] The beneficial effects of this utility model are as follows: This device uses an insertion rod type oil-water content measuring instrument as the measuring device. By combining different measuring tubes of the measuring components and adjusting the diameter ratio of different measuring tubes, the oil height in the measuring tube with a smaller diameter can be increased, which can effectively improve the accuracy of measuring the oil content of oil-water mixed fluids. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0011] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of this utility model.

[0013] In the diagram: 1. Main flow pipe; 2. Flow computer; 3. Fluid inlet; 4. Fluid outlet; 5. Electric three-way valve; 6. Measuring assembly; 7. Insertion rod type oil water content meter; 8. Connecting pipe; 601. Measuring tube one; 602. Measuring tube two; 603. Measuring tube three. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Example 1:

[0016] like Figure 1As shown, an oil water content measuring device includes a main flow pipe 1 and a flow computer 2. The main flow pipe 1 has a fluid inlet 3 and a fluid outlet 4 at both ends. An electric three-way valve 5 is installed on the main flow pipe 1, with two outlets connected to the main flow pipe 1. A measuring component 6 is installed at the other outlet of the electric three-way valve 5. An insertion rod type oil water content measuring instrument 7 is installed on the top of the measuring component 6. Several microwave probes are installed inside the rod of the insertion rod type oil water content measuring instrument 7. An electric heating tape is installed on the outer surface of the measuring component 6. A connecting pipe 8, with one end connected to the measuring component 6, is also provided on the measuring component 6. The other end is connected to the main flow pipe 1 located between the electric three-way valve 5 and the fluid outlet 4. The electric three-way valve 5 and the insertion rod type oil water content meter 7 are respectively connected to the flow computer 2. The measuring component 6 includes measuring tube 1 601, measuring tube 2 602 and measuring tube 3 603 arranged from top to bottom and connected to each other. The diameter of measuring tube 2 602 is larger than the diameter of measuring tube 1 601 and measuring tube 3 603. The diameters of measuring tube 1 601 and measuring tube 3 603 are the same. The insertion rod type oil water content meter 7 is located at the top of measuring tube 1 601. One end of the connecting pipe 8 is connected to measuring tube 1 601.

[0017] The structural design of this embodiment is for measuring oil-water mixtures with a suitable water content after sampling. When performing the above two measurements, the oil water content measurement method is as follows, including the following steps:

[0018] Step 1: Set up the device upstream of the oil and gas development site. The measurement component 6 is set up as measurement tube 1 601, measurement tube 2 602 and measurement tube 3 603. Ensure that the diameter of measurement tube 2 602 is larger than the diameter of measurement tube 1 601 and measurement tube 3 603. Proceed to step 2.

[0019] Step 2: The oil-water mixture enters the main flow pipe 1 through the fluid inlet 3. If continuous measurement of oil water content is to be performed, proceed to step 3. If high-precision measurement of oil water content is to be performed, proceed to step 4.

[0020] Step 3: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4. The oil-water mixture enters the measuring component 6, and the rod-type oil water content meter 7 measures the oil water content in real time and outputs the measured data to the flow computer 2. After measurement, the oil-water mixture enters the main flow pipe 1 through the connecting pipe and is discharged from the fluid outlet 4.

[0021] Step 4: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and close the channel between the main flow pipe 1 and the measuring component 6. Some oil-water mixture fluid remains in the measuring component 6, and then proceed to step 5.

[0022] Step 5: The flow computer 2 sets the heating time, the electric heating tape works, and the measuring component 6 is heated. The oil-water mixture in the measuring component 6 continues to dewax, settle mud and sand, and remove air bubbles under the action of high temperature. When the set heating time is reached, the rod-type oil water content measuring instrument 7 is inserted to measure the oil water content in real time and outputs the measured data to the flow computer 2, and then proceeds to step 6.

[0023] Step 6: The flow computer 2 controls the electric three-way valve 5 to connect the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4, then proceeds to step 3.

[0024] Example 2:

[0025] like Figure 2 As shown, an oil water content measuring device includes a main flow pipe 1 and a flow computer 2. The main flow pipe 1 has a fluid inlet 3 and a fluid outlet 4 at both ends. An electric three-way valve 5 is installed on the main flow pipe 1, with two outlets connected to the main flow pipe 1. A measuring component 6 is installed at the other outlet of the electric three-way valve 5. An insertion rod type oil water content measuring instrument 7 is installed on the top of the measuring component 6. Several microwave probes are installed inside the rod of the insertion rod type oil water content measuring instrument 7. An electric heating tape is installed on the outer surface of the measuring component 6, and one end of the measuring component 6 is connected to… The connecting pipe 8 is connected to the main pipe 1 located between the electric three-way valve 5 and the fluid outlet 4. The electric three-way valve 5 and the insertion rod type oil water content meter 7 are respectively connected to the flow computer 2. In one embodiment, the measuring component 6 includes a measuring pipe 601 and a measuring pipe 602 arranged from top to bottom and connected to each other. The diameter of the measuring pipe 601 is smaller than the diameter of the measuring pipe 602. The insertion rod type oil water content meter 7 is located at the top of the measuring pipe 601. One end of the connecting pipe 8 is connected to the measuring pipe 601.

[0026] The structural configuration of this embodiment is used for measuring oil-water mixtures with high oil-water content after sampling. When performing the above measurement, the oil-water content measurement method is as follows, including the following steps:

[0027] Step 1: Set up the device upstream of the oil and gas development site. Set up the measurement component 6 as measurement tube 1 601 and measurement tube 2 602, ensuring that the diameter of measurement tube 1 601 is smaller than the diameter of measurement tube 2 602, and proceed to step 2.

[0028] Step 2: The oil-water mixture enters the main flow pipe 1 through the fluid inlet 3. If continuous measurement of oil water content is to be performed, proceed to step 3. If high-precision measurement of oil water content is to be performed, proceed to step 4.

[0029] Step 3: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4. The oil-water mixture enters the measuring component 6, and the rod-type oil water content measuring instrument 7 measures the oil water content in real time and outputs the measured data to the flow computer 2. After measurement, the oil-water mixture enters the main flow pipe 1 through the connecting pipe and is discharged from the fluid outlet 4.

[0030] Step 4: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and close the channel between the main flow pipe 1 and the measuring component 6. Some oil-water mixture fluid remains in the measuring component 6, and then proceed to step 5.

[0031] Step 5: The flow computer 2 sets the heating time, the electric heating tape works, and the measuring component 6 is heated. The oil-water mixture in the measuring component 6 continues to dewax, settle mud and sand, and remove air bubbles under the action of high temperature. When the set heating time is reached, the rod-type oil water content measuring instrument 7 is inserted to measure the oil water content in real time and outputs the measured data to the flow computer 2, and then proceeds to step 6.

[0032] Step 6: The flow computer 2 controls the electric three-way valve 5 to connect the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4, then proceeds to step 3.

[0033] Example 3:

[0034] like Figure 3 As shown, an oil water content measuring device includes a main flow pipe 1 and a flow computer 2. The main flow pipe 1 has a fluid inlet 3 and a fluid outlet 4 at both ends. An electric three-way valve 5 is installed on the main flow pipe 1, with two outlets connected to the main flow pipe 1. A measuring component 6 is installed at the other outlet of the electric three-way valve 5. An insertion rod type oil water content measuring instrument 7 is installed on the top of the measuring component 6. Several microwave probes are installed inside the rod of the insertion rod type oil water content measuring instrument 7. An electric heating tape is installed on the outer surface of the measuring component 6. The measuring component 6 is equipped with... One end of the connecting pipe 8 is connected to the main pipe 1 located between the electric three-way valve 5 and the fluid outlet 4. The electric three-way valve 5 and the insertion rod type oil water content meter 7 are respectively connected to the flow computer 2. The measuring component 6 includes a measuring pipe 601 and a measuring pipe 602 arranged from top to bottom and connected to each other. The diameter of the measuring pipe 601 is larger than the diameter of the measuring pipe 602. The insertion rod type oil water content meter 7 is located at the top of the measuring pipe 601. One end of the connecting pipe 8 is connected to the measuring pipe 601.

[0035] The structural configuration of this embodiment is used for measuring oil-water mixtures with low oil-water content after sampling. The oil-water content measurement method is as follows, including the following steps:

[0036] Step 1: Set up the device upstream of the oil and gas development site to sample the oil-water mixture. Based on the oil water content obtained from the sampling, set up the measurement component 6. The measurement component 6 is set up as measurement tube 1 601 and measurement tube 2 602. Ensure that the diameter of measurement tube 1 601 is larger than the diameter of measurement tube 2 602. Proceed to Step 2.

[0037] Step 2: The oil-water mixture enters the main flow pipe 1 through the fluid inlet 3. If continuous measurement of oil water content is to be performed, proceed to step 3. If high-precision measurement of oil water content is to be performed, proceed to step 4.

[0038] Step 3: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4. The oil-water mixture enters the measuring component 6, and the rod-type oil water content measuring instrument 7 measures the oil water content in real time and outputs the measured data to the flow computer 2. After measurement, the oil-water mixture enters the main flow pipe 1 through the connecting pipe and is discharged from the fluid outlet 4.

[0039] Step 4: The flow computer 2 controls the electric three-way valve 5 to open the main flow pipe 1 and close the channel between the main flow pipe 1 and the measuring component 6. Some oil-water mixture fluid remains in the measuring component 6, and then proceed to step 5.

[0040] Step 5: The flow computer 2 sets the heating time, the electric heating tape works, and the measuring component 6 is heated. The oil-water mixture in the measuring component 6 continues to dewax, settle mud and sand, and remove air bubbles under the action of high temperature. When the set heating time is reached, the rod-type oil water content measuring instrument 7 is inserted to measure the oil water content in real time and outputs the measured data to the flow computer 2, and then proceeds to step 6.

[0041] Step 6: The flow computer 2 controls the electric three-way valve 5 to connect the main flow pipe 1 and the measuring component 6, and closes the channel from the main flow pipe 1 to the fluid outlet 4, then proceeds to step 3.

[0042] In the three embodiments described above, the insertion rod type oil water content measuring instrument 7 of this device has dozens of microwave probes distributed within the rod according to its length, which can measure the oil water content within the measuring component 6 in a scanning-like manner; its resolution is 20-30 mm. The distance between the multiple microwave probes within the insertion rod type oil water content measuring instrument 7 is 20-30 mm, which determines the resolution and uncertainty of the oil water content measurement. The percentage of the distance between the microwave probes to the rod length is the oil water content measurement error.

[0043] In the three embodiments described above, the specific data standards for the three scenarios of high oil water content, low oil water content, and moderate oil water content in the sampled oil-water mixture are set according to the specific conditions of the upstream oil and gas development. The measurement components are designed to ensure effective and accurate oil water content measurement. If the measurement component 6 cannot meet the requirements for accurate oil water content measurement based on the oil water content data measured by this device, the configuration of each measuring tube in the measurement component 6 can be replaced. The accuracy of the measurement is met by adjusting the tube diameter and length. In all three modes, at least one measuring tube has a thinner diameter and a higher height to ensure that the oil, water, or oil-water mixture has a certain height within the measurement component; by increasing the height, the measurement accuracy is ensured in conjunction with the distributed microwave probes of the insertion rod-type oil water content measuring instrument 7.

[0044] If the sampled oil has a water content of 95%, this is considered high oil water content. Therefore, the diameter of measuring tube 1 (601) can be set to 50mm and its height to 0.5m, and the diameter of measuring tube 2 (602) to 150mm and its height to 1m. The rod of the insertion rod-type oil water content measuring instrument 7 is 0.8m long. During high oil water content measurement, measuring tubes 1 (601) and 2 (602) are filled with oil-water liquid containing 95% water. After heating by the electric heating tape wrapped around the outside of the measuring component 6, sediment settling, and air bubbles being removed over a certain period, the pure oil height in measuring tube 1 (601) is approximately 470mm, with a pure oil content relative error of 5.3% and an oil water content relative error of 0.28%.

[0045] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An oil water content measuring device, characterized in that, The system includes a main flow pipe (1) and a flow computer (2). The main flow pipe (1) has a fluid inlet (3) and a fluid outlet (4) at both ends. The main flow pipe (1) is equipped with an electric three-way valve (5). Two outlets of the electric three-way valve (5) are connected to the main flow pipe (1). The other outlet of the electric three-way valve (5) is equipped with a measuring component (6). The top of the measuring component (6) is equipped with an insertion rod type oil water content measuring instrument (7). The insertion rod type oil water content measuring instrument (7) has several microwave probes inside its rod. The outer surface of the measuring component (6) is equipped with an electric heating tape. The measuring component (6) is equipped with a connecting pipe (8) with one end connected to it. The other end of the connecting pipe (8) is connected to the main flow pipe (1) located between the electric three-way valve (5) and the fluid outlet (4). The electric three-way valve (5) and the insertion rod type oil water content measuring instrument (7) are respectively connected to the flow computer (2).

2. The oil water content measuring device according to claim 1, characterized in that, The measuring component (6) includes measuring tube one (601), measuring tube two (602) and measuring tube three (603) arranged from top to bottom and connected to each other. The diameter of measuring tube two (602) is larger than the diameter of measuring tube one (601) and measuring tube three (603). The insertion rod type oil water content measuring instrument (7) is set at the top of measuring tube one (601). One end of the connecting pipe (8) is connected to measuring tube one (601).

3. The oil water content measuring device according to claim 1, characterized in that, The measuring component (6) includes a measuring tube one (601) and a measuring tube two (602) arranged from top to bottom and connected to each other. The diameter of the measuring tube one (601) is smaller than the diameter of the measuring tube two (602). The insertion rod type oil water content measuring instrument (7) is set at the top of the measuring tube one (601). One end of the connecting pipe (8) is connected to the measuring tube one (601).

4. The oil water content measuring device according to claim 1, characterized in that, The measuring component (6) includes a measuring tube one (601) and a measuring tube two (602) arranged from top to bottom and connected to each other. The diameter of the measuring tube one (601) is larger than the diameter of the measuring tube two (602). The insert rod type oil water content measuring instrument (7) is set at the top of the measuring tube one (601). One end of the connecting pipe (8) is connected to the measuring tube one (601).

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