Hydrophobic proppant detection equipment

Abstract

The embodiment of the utility model provides hydrophobic proppant detection equipment. The detection equipment comprises a tank body, a partition plate with holes, an air blowing device, a color inductive sensor, a liquid inlet device and a collecting tank, the collecting tank is arranged in the tank body and used for collecting liquid injected by the liquid inlet device, and the collecting tank is provided with an opening; the perforated partition plate is positioned in the tank body and covers the opening of the collecting tank; a hydrophobic proppant is placed on the partition plate with the holes; the color inductive sensor is located on the side, away from the collecting tank, of the partition plate with the holes, is annularly arranged on the inner circumferential wall of the tank body and is used for detecting the color change of the hydrophobic proppant; and the air blowing device is communicated with the collecting tank and is used for blowing air to the hydrophobic proppant in the tank body.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure belong to the technical field of hydrophobic proppant detection, and particularly relate to a hydrophobic proppant detection device. BACKGROUND

[0002] With the rapid development of economy, the use of oil and natural gas is increasing in the world, but with the long time of mining, the reserves of limited mineral resources such as oil and natural gas are decreasing, and the difficulty of oil and natural gas mining is increasing, which brings energy crisis and becomes a problem to be solved. In order to mine oil and gas resources with larger yield, hydraulic fracturing technology has become a main mining technology.

[0003] Hydraulic fracturing is an important measure for increasing production and injection in oil and gas fields, and has achieved good results in increasing production and reconstruction of oil and gas reservoirs. It is to use a high-pressure pump truck group to inject high-viscosity liquid into the well to form high pressure at the bottom of the well. When the well bottom pressure is greater than the formation fracture pressure, a fracture is produced. Continue to inject sand-carrying liquid with proppant, and the fracture extends forward and is filled with proppant. After shut-in and flowback, the fracture is closed on the proppant, so that the fracture is supported, thereby forming a sand-filled fracture with high conductivity in the reservoir layer, and ultimately achieving the purpose of increasing production and injection. The problem of high water content is an important problem faced by old oilfields at present. The recovery of water will increase the treatment cost and cause the decrease of formation energy, which is ultimately not conducive to efficient exploitation. Hydrophobic proppant has attracted widespread attention from researchers because it can effectively reduce the water content of produced liquid. However, there is currently a lack of a special device for detecting the performance of hydrophobic proppant. SUMMARY

[0004] Embodiments of the present disclosure aim to at least solve one of the technical problems existing in the prior art, and provide a hydrophobic proppant detection device.

[0005] In one aspect of embodiments of the present disclosure, a hydrophobic proppant detection device is provided, which comprises a tank body, a perforated partition plate, an air blowing device, a color sensing sensor, a liquid inlet device and a collection tank.

[0006] The collection tank is arranged in the tank body and is used to collect the liquid injected by the liquid inlet device. The collection tank has an opening.

[0007] The perforated partition plate is located in the tank body and covers the opening of the collection tank. The perforated partition plate is used to place the hydrophobic proppant.

[0008] The color sensing sensor is located on the side of the perforated partition plate away from the collection tank and is annularly arranged on the peripheral wall of the tank body. The color sensing sensor is used to detect the color change of the hydrophobic proppant.

[0009] The air blowing device is in communication with the collecting tank and is used to blow air to the hydrophobic proppants in the tank.

[0010] Further, the hydrophobic proppant detection device further comprises a perforated center pipe arranged in the tank body and located on the side of the perforated partition plate away from the collecting tank, wherein the perforated center pipe is arranged between the color sensing sensor and the perforated partition plate.

[0011] Optionally, the air blowing device comprises an air blowing pump and an air pipe, one end of the air pipe is in communication with the air blowing pump, and the other end of the air pipe is in communication with the collecting tank.

[0012] Optionally, the air blowing device further comprises a first control valve arranged in the air pipe and used to control the air inflow.

[0013] Optionally, the air blowing device further comprises an exhaust valve arranged in the air pipe, wherein the exhaust valve is located between the first control valve and the collecting tank.

[0014] Optionally, the liquid inlet device comprises a liquid inlet pipe and a second control valve, one end of the liquid inlet pipe is used to connect with a liquid storage device, and the other end of the liquid inlet pipe extends into the tank body; the second control valve is arranged in the liquid inlet pipe and used to control the liquid inflow.

[0015] Optionally, the collecting tank is in a conical shape, wherein the tip of the conical collecting tank is in abutment with the bottom wall of the tank body, and the bottom end is in abutment with the side wall of the tank body.

[0016] Optionally, the side wall of the tank body is provided with a scale, and the scale is used to identify the liquid level.

[0017] Optionally, the detection device further comprises a support structure arranged in the tank body and used to support the collecting tank.

[0018] Optionally, the first control valve and the exhaust valve are both ball valves.

[0019] The beneficial effects of the embodiments of the present disclosure include:

[0020] The present disclosure provides a detection device capable of detecting the water blocking height, oil permeation time and air permeability of hydrophobic proppants, and the detection device has the characteristics of simple and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic diagram of a hydrophobic proppant detection device according to an embodiment of the present disclosure.

[0022] In the diagram, 1. Tank body; 2. Perforated baffle; 3. Air blowing device; 4. Color sensor; 5. Liquid inlet device; 6. Collection tank; 7. Perforated central tube; 11. Scale; 31. Air pump; 32. Air pipe; 33. First control valve; 34. Exhaust valve; 51. Liquid inlet pipe; 52. Second control valve; 61. Valve. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments. In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to 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 application depending on the specific circumstances.

[0026] like Figure 1 As shown, a hydrophobic proppant testing device includes a tank 1, a perforated baffle 2, an aeration device 3, a color sensor 4, a liquid inlet device 5, and a collection tank 6. The collection tank 6 is located inside the tank 1 and is used to collect the liquid injected by the liquid inlet device 5. The collection tank 6 has an opening. The perforated baffle 2 is located inside the tank 1 and covers the opening of the collection tank 6. The perforated baffle 2 is used to place the hydrophobic proppant. The color sensor 4 is located on the side of the perforated baffle 2 opposite to the collection tank 6 and is arranged around the outer peripheral wall of the tank 1. The color sensor 4 is used to detect color changes of the hydrophobic proppant. The aeration device 3 is connected to the collection tank 6 and is used to aerate the liquid inside the collection tank 6.

[0027] In some embodiments, the detection device further comprises a perforated center tube 7 arranged in the tank body 1 and located on the side of the perforated baffle 2 away from the collection tank 6, wherein the perforated center tube 7 is arranged to pass through the color sensing sensor 4 and the perforated baffle 2. The perforated center tube 7 is filled with hydrophobic proppant.

[0028] When water is injected into the tank body 1, a water layer is formed under the blockage of the hydrophobic proppant. If oil is added, the oil layer cannot contact the proppant because the oil is lighter, so the permeability of the oil cannot be detected. Therefore, the perforated center tube 7 is filled with hydrophobic proppant, and the upper surface is higher than the water layer, which can contact the oil on the water surface, so the permeability of the contrast oil can be evaluated.

[0029] In some embodiments, the perforated center tube 7 is arranged at the center of the perforated baffle 2. Because the oil can wet the inner surface of the tank body 1, a concave liquid surface is formed at the center. Arranging the perforated center tube 7 at the center of the container can reduce the amount of residual oil.

[0030] In some embodiments, the air blowing device 3 comprises an air blowing pump 31 and an air pipe 32. One end of the air pipe 32 is in communication with the air blowing pump 31, and the other end is in communication with the collection tank 6.

[0031] In some embodiments, the air blowing device 3 further comprises a first control valve 33 arranged in the air pipe 32 for controlling the air flow.

[0032] In some embodiments, the air blowing device 3 further comprises an exhaust valve 34 arranged in the air pipe 32, and the exhaust valve 34 is located between the first control valve 33 and the collection tank 6. The exhaust valve is used to exhaust the gas during the adjustment of the gas flow, so as to avoid the gas entering the collection tank 6 too early and causing deviation of the results.

[0033] In some embodiments, the liquid inlet device 5 comprises a liquid inlet pipe 51 and a second control valve 52. One end of the liquid inlet pipe 51 is used to connect with the liquid storage device, and the other end extends into the tank body 1. The second control valve 52 is arranged in the liquid inlet pipe 51 for controlling the liquid flow.

[0034] In some embodiments, the collection tank 6 is conical, wherein the tip of the conical collection tank 6 abuts against the bottom wall of the tank body 1, and the bottom end abuts against the side wall of the tank body 1. The conical collection tank 6 facilitates the discharge of the liquid in the collection tank 6 after the experiment.

[0035] In some embodiments, the side wall of the tank body 1 is provided with a scale 11 for indicating the liquid level.

[0036] In some embodiments, the detection device further comprises a support structure arranged in the tank body 1 for supporting the collection tank 6.

[0037] In some embodiments, the first control valve 33 and the exhaust valve 34 are both ball valves. The second control valve 52 is a ball valve.

[0038] The detection principle of the hydrophobic proppant detection device of the present disclosure includes:

[0039] 1. Water blocking height determination: Add hydrophobic proppant into the tank (specifically place it above the perforated baffle and in the perforated central pipe), and make the hydrophobic proppant flat on the upper surface of the perforated baffle and level with the surface of the color response sensor.

[0040] Further, close the ball valves 33 and 34 of the air blowing device and the valve 61 of the conical collection tank. The valves are closed during the test to prevent liquid and gas from overflowing, and after the test is completed, open the valve 61 to release the liquid.

[0041] Further, slowly open the ball valve 52 (when liquid is added, the water flow cannot wash the hydrophobic proppant on the upper surface of the perforated baffle out of the pit), and the water slowly flows into the inner wall of the tank until the color response sensor alarms, and the scale is read as the water blocking height of the hydrophobic proppant.

[0042] The perforated baffle can ensure that the liquid can leak into the collection tank through the perforated baffle above the perforated baffle, the conical collection tank facilitates the release of the liquid after the test is completed, and the perforated central pipe can ensure the effective contact of the oil and the proppant.

[0043] 2. Add hydrophobic proppant into the tank (specifically place it above the perforated baffle and in the perforated central pipe), and make the hydrophobic proppant flat on the upper surface of the perforated baffle and level with the surface of the color response sensor.

[0044] Further, close the ball valves 33 and 34 of the air blowing device and the valve 61 of the conical collection tank.

[0045] Further, slowly open the ball valve 52 (when liquid is added, the water flow cannot wash the hydrophobic proppant on the upper surface of the perforated baffle out of the pit), and the water slowly flows into the inner wall of the tank until the water height in the tank reaches half of the water blocking height, then replace the liquid at the liquid inlet device with petroleum. Slowly add petroleum until the height of the added petroleum reaches 1 / 4 of the water blocking height, and record the time from the beginning of the first drop of oil penetrating the sand layer to the end of the floating oil in the upper container as the penetration time.

[0046] 3. Add hydrophobic proppant into the tank (specifically place it above the perforated baffle and in the perforated central pipe), and make the hydrophobic proppant flat on the upper surface of the perforated baffle and level with the surface of the color response sensor.

[0047] Further, close the ball valves 33 and 34 of the air blowing device and the valve 61 of the conical collection tank.

[0048] Further, slowly open the ball valve 52 (when liquid is added, water flow cannot flush the hydrophobic proppant on the upper surface of the hole partition out of the pit), water slowly flows along the inner wall of the tank, until the water level in the container reaches half of the water blocking height, close the ball valve 52. Open the ball valves 33, 34, open the air pump, adjust the opening degree of the ball valve 33 to 100 ml / min, then close the ball valve 34, the gas uniformly enters the collection tank, and the gas penetrates through the hydrophobic proppant layer and penetrates through the water layer and overflows, and the air is blown for 1 minute, if the color sensing sensor does not alarm, it meets the air permeability requirement.

[0049] The present disclosure provides a detection device capable of detecting the water blocking height, oil permeation time and air permeability of hydrophobic proppant, which has the characteristics of simple and convenient operation.

[0050] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present disclosure, but the present disclosure is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered to be within the protection scope of the present disclosure.

Claims

1. A device for testing hydrophobic proppant, characterized in that, The detection equipment includes a tank, a perforated baffle, an air blowing device, a color sensing sensor, a liquid inlet device, and a collection tank; The collection tank is disposed inside the tank body and is used to collect the liquid injected by the liquid inlet device. The collection tank has an opening. The perforated partition is located inside the tank and covers the opening of the collection tank; the perforated partition is used to place a hydrophobic support agent. The color sensor is located on the side of the perforated partition away from the collection tank and is arranged around the outer peripheral wall of the tank. The color sensor is used to detect the color change of the hydrophobic support. The aeration device is connected to the collection tank and is used to aerate the hydrophobic support in the tank.

2. The hydrophobic proppant testing device according to claim 1, characterized in that, Also includes: A perforated central tube is disposed inside the tank and located on the side of the perforated partition away from the collection tank, wherein the perforated central tube is connected to the perforated partition.

3. The hydrophobic proppant testing device according to claim 1 or 2, characterized in that, The air-blowing device includes an air pump and an air pipe, with one end of the air pipe connected to the air pump and the other end connected to the collection tank.

4. The hydrophobic proppant testing device according to claim 3, characterized in that, The air blowing device also includes a first control valve, which is disposed in the air pipe and is used to control the air intake flow rate.

5. The hydrophobic proppant testing device according to claim 4, characterized in that, The air blowing device also includes an exhaust valve, which is disposed on the air pipe and located between the first control valve and the collection tank.

6. A hydrophobic proppant testing device according to claim 1 or 2, characterized in that, The liquid inlet device includes an inlet pipe and a second control valve. One end of the inlet pipe is used to connect to the liquid storage device, and the other end extends into the tank body. The second control valve is located on the inlet pipe and is used to control the liquid inlet flow rate.

7. A hydrophobic proppant testing device according to claim 1 or 2, characterized in that, The collection tank is conical, wherein the tip of the conical collection tank abuts against the bottom wall of the tank body, and the bottom end abuts against the side wall of the tank body.

8. A hydrophobic proppant testing device according to claim 1 or 2, characterized in that, The tank has graduations on its side wall, which are used to indicate the liquid level.

9. A hydrophobic proppant testing device according to claim 1 or 2, characterized in that, The detection equipment also includes a support structure disposed inside the tank for supporting the collection tank.

10. The hydrophobic proppant testing device according to claim 5, characterized in that, Both the first control valve and the exhaust valve are ball valves.

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