Water injection detection device for producing well

Abstract

The utility model discloses a producing well water injection detection device which comprises a water injection system and a liquid taking system which are both embedded underground, a liquid outlet of the liquid taking system is connected with a water oil tank, a water outlet pipe and an oil outlet pipe are arranged on the water oil tank in a communicated mode, the oil outlet pipe is arranged above the water outlet pipe, and the water outlet pipe is connected with a water storage tank. And the oil outlet pipe is connected with an oil storage tank capable of weighing oil. According to the device, the quantity of crude oil displaced by a quantitative water source can be accurately measured and calculated, a plurality of test samples are formed by further adjusting the water injection rate of the water injection system, a plurality of test data are further obtained, and finally the optimal water injection rate for generating the maximum oil production can be extracted. The whole operation process is simple and effective, an efficient oil-water separation function and a real-time crude oil mass weighing function are combined, and meanwhile accurate regulation and control of the water injection rate are matched, so that the optimal water injection rate reaching the maximum oil production rate can be accurately measured, and yield increase and efficiency increase of the oil production well are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil exploitation, and in particular to a water injection detection device for oil production well. BACKGROUND

[0002] Oil is a fluid mineral buried in the ground, so people need to exploit oil from the oil-bearing layer of the earth's crust. In the process of oil exploitation, water injection for oil production is to inject water into the interstice of the oil reservoir layer by using water injection equipment, and more crude oil is displaced from the oil layer by using water as a driving agent. By injecting water into the oil reservoir, the formation pressure can be effectively maintained or increased, and the crude oil can be promoted to flow to the production well, thereby improving the oil production efficiency.

[0003] However, the existing water injection oil production well is usually difficult to accurately detect the best water injection amount that can reach the maximum oil production, and in the actual water injection oil production process, if the water injection well injects more water, a water flow channel is easily formed, and energy is wasted, and if the water injection is less, the oil displacement efficiency is low, and the yield increasing effect cannot be achieved. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a water injection detection device for oil production well to solve the technical problem that in the prior art, the best water injection amount cannot be accurately measured, thereby causing inconvenience in use and wasting resources.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A water injection detection device for oil production well, comprising a water injection system capable of adjusting water injection amount and a liquid taking system with a liquid outlet, wherein the water injection system and the liquid taking system are embedded underground for injecting a certain amount of water into the oil layer and extracting an equal amount of oil-water mixture in the oil layer, the liquid outlet of the liquid taking system is connected with a water-oil tank, a water outlet pipe and an oil outlet pipe are communicatively arranged on the water-oil tank, the oil outlet pipe is arranged above the water outlet pipe, the water outlet pipe is connected with a water storage tank, and the oil outlet pipe is connected with an oil storage tank capable of weighing oil amount.

[0007] A first water detector is arranged above the water outlet pipe in the water-oil tank, the water outlet pipe stops pumping water when the first water detector does not identify water, and the water outlet pipe pumps water to the outside when the first water detector identifies water.

[0008] A first oil detector is arranged below the oil outlet pipe in the water-oil tank, the oil outlet pipe stops pumping oil when the first oil detector does not detect oil, and the oil outlet pipe pumps oil to the outside when the first oil detector detects oil.

[0009] As a preferred scheme of the utility model, the liquid taking system is connected with the water and oil tank through the temporary storage tank, the temporary storage tank is connected with the liquid outlet through the normally open valve, and the temporary storage tank is connected with the water and oil tank through the intermittent valve.

[0010] As a preferred scheme of the utility model, the first electromagnetic valve is arranged in the water outlet pipe, the first water detector is electrically connected with the first electromagnetic valve to control the opening of the first electromagnetic valve.

[0011] The second water detector is arranged above the first water detector, the second water detector is electrically connected with the first electromagnetic valve, and the second water detector controls the closing of the first electromagnetic valve when the second water detector does not identify water.

[0012] As a preferred scheme of the utility model, the second electromagnetic valve is arranged in the oil outlet pipe, and the first oil detector is electrically connected with the second electromagnetic valve.

[0013] The first oil detector triggers the opening of the second electromagnetic valve when detecting oil.

[0014] The first oil detector triggers the closing of the second electromagnetic valve when not detecting oil.

[0015] As a preferred scheme of the utility model, the water injection system comprises a water distribution device, a water injection well head and a downhole pipe column connected in sequence, the water distribution device and the water injection well head are arranged on the ground surface, and the downhole pipe column is embedded in the underground oil layer.

[0016] As a preferred scheme of the utility model, the water distribution device comprises an upflow valve, a downflow valve, a water flow meter, a pump pressure gauge and an oil pressure gauge.

[0017] The water injection well head comprises a test valve, a production valve, a total valve, a casing valve, a vent valve, a casing vent valve and a casing pressure gauge.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses a water injection system capable of adjusting water injection amount, a water and oil tank capable of separating oil and water and an oil storage tank capable of weighing oil amount, through the cooperative work of various components, the quantitative water source displacement crude oil amount can be accurately calculated, further through the adjustment of the water injection amount of the water injection system, multiple test samples are formed to obtain multiple test data, finally the best water injection amount for generating the maximum oil production amount can be extracted. The whole operation process is simple and effective, through the combination of the efficient oil and water separation function and the real-time weighing crude oil amount function, the accurate regulation and control of the water injection amount are matched, so that the best water injection amount reaching the maximum oil production amount can be accurately measured, and the oil production well is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the accompanying drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0022] Figure 2 It is a schematic diagram of the overall structure of the present application Figure 1 It is an enlarged view of A in the present application.

[0023] The reference numerals in the drawings represent the following:

[0024] 1, water injection system; 2, liquid discharge port; 3, liquid taking system; 4, water outlet pipe; 5, oil outlet pipe; 6, water storage tank; 7, oil storage tank; 8, first water detector; 9, first oil detector; 10, temporary storage tank; 11, normally open valve; 12, intermittent valve; 13, first electromagnetic valve; 14, second water detector; 15, second electromagnetic valve; 16, water and oil tank; 17, water distribution device; 18, water injection wellhead; 19, downhole string; 20, upflow valve; 21, downflow valve; 22, water flow meter; 23, pump pressure gauge; 24, oil pressure gauge; 25, test valve; 26, production valve; 27, master valve; 28, casing valve; 29, vent valve; 30, casing vent valve; 31, casing pressure gauge. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] As Figures 1 to 2The utility model provides a kind of oil extraction well water injection detection device, including adjustable water injection system 1 of water injection quantity and the liquid taking system 3 with liquid outlet 2, water injection system 1 and liquid taking system 3 are embedded underground for injecting quantitative water to oil layer and extracting equivalent oil-water mixture in oil layer, the liquid outlet 2 of liquid taking system 3 is connected with water-oil tank 16, water-oil tank 16 is connected with water outlet pipe 4 and oil outlet pipe 5 and is arranged, oil outlet pipe 5 is arranged above water outlet pipe 4, water outlet pipe 4 is connected with water storage tank 6, and oil outlet pipe 5 is connected with oil storage tank 7 capable of weighing oil amount.In addition, control system is provided outside equipment, control system is connected with first water detector 8, first oil detector 9, first electromagnetic valve 13, second water detector 14, second electromagnetic valve 15 and other electric equipment, for controlling its normal work.

[0027] As Figure 2 As shown, first water detector 8 is arranged above water outlet pipe 4 in water-oil tank 16, water outlet pipe 4 extracts water to outside when first water detector 8 identifies water body, and water outlet pipe 4 stops water extraction when first water detector 8 does not identify water body.

[0028] First oil detector 9 is arranged below oil outlet pipe 5 in water-oil tank 16, oil outlet pipe 5 extracts oil to outside when first oil detector 9 detects oil body, and oil outlet pipe 5 stops oil extraction when first oil detector 9 does not detect oil body.

[0029] Liquid taking system 3 is connected with water-oil tank 16 through temporary storage tank 10, temporary storage tank 10 is connected with liquid outlet 2 through normally open valve 11, and temporary storage tank 10 is connected with water-oil tank 16 through intermittent valve 12 (valve switch capable of periodic, point operation in prior art). The setting of temporary storage tank 10 can control the frequency of discharging water-oil mixture into water-oil tank 16 through intermittent valve 12.Liquid taking system 3 continuously inputs water-oil mixture into temporary storage tank 10 through normally open valve 11 (having closing function, but normally open in normal use, for continuously extracting water-oil mixture), and temporary storage tank 10 periodically discharges water-oil mixture into water-oil tank 16 through intermittent valve 12. Water-oil mixture needs a certain time to precipitate in water-oil tank 16, so that water and petroleum are layered, so this intermittent valve 12 is closed, so that the overall device has better layering effect when water and oil are separated, so that subsequent water and oil separation is more accurate.

[0030] As Figure 2 Further, first electromagnetic valve 13 is arranged in water outlet pipe 4, and first water detector 8 is electrically connected with first electromagnetic valve 13 to control the opening of first electromagnetic valve 13.

[0031] Second water detector 14 is arranged above first water detector 8, and second water detector 14 is electrically connected with first electromagnetic valve 13, and first electromagnetic valve 13 is controlled to be closed when second water detector 14 does not identify water body.

[0032] The second water detector 14 is designed to more precisely control the oil-water separation process, ensuring that the water discharged from the outlet pipe 4 is pure water, not a mixture containing a significant amount of crude oil. The principle is that, since the oil and water in the sedimentation tank 16 will separate into layers, and because the second water detector 14 is located above the first water detector 8, when the second water detector 14 detects water, the oil outlet pipe 5 will definitely be drawing pure water. As the water is gradually discharged, the upper layer of crude oil gradually descends. When it comes into contact with the second water detector 14, the preset distance between it and the first water detector 8 ensures a large gap between it and the outlet pipe 4. Therefore, when the second water detector 14 detects crude oil instead of water, the first solenoid valve 13 can immediately close, preventing crude oil from being mistakenly drawn into the outlet pipe 4 due to delayed closure.

[0033] Similarly, such as Figure 2 As shown, a second solenoid valve 15 is installed inside the oil outlet pipe 5, and the first oil detector 9 is electrically connected to the second solenoid valve 15. When the first oil detector 9 detects oil, it triggers the second solenoid valve 15 to open. When the first oil detector 9 does not detect oil, it triggers the second solenoid valve 15 to close.

[0034] When the first oil detector 9 below the oil outlet pipe 5 detects oil, it can ensure that the liquid above the oil outlet pipe 5 is pure petroleum without water. Therefore, it can ensure the accuracy of the collected oil, reduce the error in oil volume measurement, and make the detection results more accurate.

[0035] In addition, in practical applications, after the overall measurement and testing process is completed, the water storage tank 6, oil storage tank 7 and water-oil tank 16 can be connected to the outflow pipeline to reassemble the water, oil and water-oil mixture separated inside them to meet different application requirements.

[0036] like Figure 1 As shown, the water injection system 1 includes a water distribution device 17, a water injection wellhead 18, and a downhole tubing string 19 connected in sequence. The water distribution device 17 and the water injection wellhead 18 are located on the surface, and the downhole tubing string 19 is embedded in the underground oil layer. The water distribution device 17 includes an upstream valve 20, a downstream valve 21, a water flow meter 22, a pump pressure gauge 23, and an oil pressure gauge 24. The water injection wellhead 18 includes a test valve 25, a production valve 26, a main valve 27, a casing valve 28, a vent valve 29, a casing vent valve 30, and a casing pressure gauge 31. The fluid extraction system 3 is a commonly used extraction system for extracting water-oil mixtures in existing oil wells, and will not be described in detail here.

[0037] Among them, the water flow meter 22 can be a dry water meter. When water impacts the impeller, the magnet on the impeller generates electromagnetic induction. The electromagnetic induction corresponds to the water flow rate, and the water volume can be measured.

[0038] The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements should also be considered to fall within the protection scope of the present application.

Claims

1. A water injection detection device for an oil production well, characterized in that The injection system (1) with adjustable water injection amount and the liquid extraction system (3) with liquid outlet (2) are embedded underground to inject a certain amount of water into the oil layer and extract an equal amount of oil-water mixture in the oil layer, the liquid outlet (2) of the liquid extraction system (3) is connected with a water-oil tank (16), the water-oil tank (16) is provided with a water outlet pipe (4) and an oil outlet pipe (5) in communication, the oil outlet pipe (5) is arranged above the water outlet pipe (4), the water outlet pipe (4) is connected with a water storage tank (6), and the oil outlet pipe (5) is connected with an oil storage tank (7) capable of weighing the amount of oil; Wherein, a first water detector (8) is arranged above the water outlet pipe (4) in the water-oil tank (16), the water outlet pipe (4) extracts water externally when the first water detector (8) identifies water, and the water outlet pipe (4) stops extracting water when the first water detector (8) does not identify water. A first oil detector (9) is arranged below the oil outlet pipe (5) in the water-oil tank (16), the oil outlet pipe (5) extracts oil externally when the first oil detector (9) detects oil, and the oil outlet pipe (5) stops extracting oil when the first oil detector (9) does not detect oil.

2. The water injection detection device for oil production wells according to claim 1, characterized in that, The liquid extraction system (3) is connected with the water-oil tank (16) through a temporary storage tank (10), the temporary storage tank (10) is connected with the liquid outlet (2) through a normally open valve (11), and the temporary storage tank (10) is connected with the water-oil tank (16) through an intermittent valve (12).

3. A water injection detection device for an oil production well according to claim 2, characterized in that A first electromagnetic valve (13) is arranged in the water outlet pipe (4), and the first water detector (8) is electrically connected with the first electromagnetic valve (13) to control the opening of the first electromagnetic valve (13); A second water detector (14) is arranged above the first water detector (8), the second water detector (14) is electrically connected with the first electromagnetic valve (13), and the second water detector (14) controls the closing of the first electromagnetic valve (13) when it does not identify water.

4. The water injection detection device for oil production wells according to claim 2, characterized in that, A second electromagnetic valve (15) is arranged in the oil outlet pipe (5), and the first oil detector (9) is electrically connected with the second electromagnetic valve (15); The first oil detector (9) triggers the opening of the second electromagnetic valve (15) when it detects oil; The first oil detector (9) triggers the closing of the second electromagnetic valve (15) when it does not detect oil.

5. The water injection detection device for oil production wells according to claim 1, characterized in that, The injection system (1) comprises a water distribution device (17), a water injection wellhead (18) and a downhole string (19) connected in sequence, the water distribution device (17) and the water injection wellhead (18) are arranged on the ground surface, and the downhole string (19) is embedded in the underground oil layer.

6. A water injection detection device for an oil production well as claimed in claim 5, wherein, The water distribution device (17) comprises an upflow valve (20), a downflow valve (21), a water flow meter (22), a pump pressure gauge (23) and an oil pressure gauge (24). The water injection wellhead (18) comprises a test valve (25), a production valve (26), a total valve (27), a casing valve (28), a vent valve (29), a casing vent valve (30) and a casing pressure gauge (31).

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