Well fluid real-time processing shaft video imaging detection method

Abstract

The invention discloses a well fluid real-time processing shaft video imaging detection method, which comprises shaft video imaging detection equipment, the shaft video imaging detection equipment comprises ground equipment, a well head device and well descending equipment, the ground equipment comprises a pump truck, a cable logging truck, a clear water truck, a clear water and sewage truck, visual detection ground equipment and a depth recording system, the well head device comprises a well head blowout prevention device and a well head tee joint, and the well descending device comprises an oil pipe, a visual detection instrument, an oil pipe water passing limiting device and an instrument water passing limiting device. Therefore, the definition of the obtained video image meets the detection requirement, and during horizontal well operation, the method not only ensures that the well fluid meets the detection condition, but also serves as a visual detection equipment conveying mode, and meanwhile, the success rate of horizontal well complex well condition operation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas wellbore detection, and in particular to a wellbore video imaging detection method for real-time processing of well fluid. Background Art

[0002] Oil and gas wells are important channels for oil and gas production. There are many downhole operation procedures and complex working conditions. The wellbore may be damaged, deformed, or have fish dropped in it, causing abnormal wellbore channels and affecting downhole operations and even oil and gas production. At present, there are abundant tools for wellbore repair and fish salvage, and the operation methods are mature. However, due to the limitations of downhole information perception methods and unclear understanding of downhole conditions, the operation measures are not targeted and efficient. Improper measures may lead to serious consequences such as wellbore scrapping. Oil and gas well visualization detection technology is based on modern downhole high-definition video acquisition, encoding, storage, and logging cable high-speed transmission technology to obtain real-time downhole color high-definition video. It is a wellbore detection technology that grasps the real downhole conditions through direct observation and video analysis. It can objectively and truly grasp the complex downhole conditions and improve the targeting and success rate of downhole operations.

[0003] Visual detection technology is based on visible light imaging and has certain requirements for the liquid environment in the wellbore. The liquid in the detection environment must be colorless and transparent. Therefore, the wellbore environment must be treated before detection, such as circulating well flushing, emptying the wellbore, etc. However, due to the complex downhole environment, even if the wellbore is treated before the operation.

[0004] However, traditional visual inspection operations have the following disadvantages:

[0005] (1) When performing visual imaging detection, the detection liquid environment at the target location may still not meet the detection requirements. The current detection environment does not meet the visual detection requirements. The only way is to lift the visual detection equipment from the wellbore to the ground, and then lower the wellbore washing string to perform wellbore treatment operations. After the wellbore is treated, visual detection can be performed again. If the wellbore environment is difficult to handle, it may be necessary to repeat wellbore treatment and visual detection many times to achieve the detection purpose, resulting in increased operating costs and extended operation cycles. If some wells still have complex situations such as oil and liquid discharge, repeated operations may not be able to fully achieve the detection purpose, resulting in detection failure;

[0006] (2) When operating in horizontal wells, it is generally necessary to use a crawler or continuous tubing to transport the detection equipment, which has high operating costs and may not be able to transport to the target location. Summary of the invention

[0007] The purpose of the present invention is to provide a method for real-time processing of wellbore video imaging detection by well fluid, so as to solve the problem raised in the above-mentioned background technology that when performing visual imaging detection, the detection liquid environment at the target position may still fail to meet the detection requirements. At present, the detection environment fails to meet the visual detection requirements, and the visual detection equipment can only be lifted out of the wellbore and then lowered into the well washing pipe string for wellbore processing operations. After the wellbore is processed, visual detection can be performed again. If the wellbore environment is difficult to handle, it may be necessary to repeat wellbore processing and visual detection for many times to achieve the detection purpose, resulting in increased operating costs and extended operating cycles. If some wells still have complex situations such as oil and liquid discharge, repeated operations may not be able to fully achieve the detection purpose, resulting in detection failure. When operating in horizontal wells, it is generally necessary to use a crawler or continuous oil pipe to transport the detection equipment, which has high operating costs and may fail to transport to the target position.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wellbore video imaging detection device for real-time processing of well fluid, including wellbore video imaging detection equipment, the wellbore video imaging detection equipment including ground equipment, wellhead device and downhole equipment, the ground equipment including a pump truck, a cable logging truck, a clean water truck and clean water and sewage trucks, visual detection ground equipment and a depth recording system, the wellhead device including a wellhead blowout preventer and a wellhead tee, the downhole equipment including an oil pipe, a visual detection instrument, an oil pipe water-through limit device and an instrument water-through limit device, and a visual instrument lens is fixedly installed at the front end of the visual detection instrument.

[0009] As a preferred technical solution of the present invention, a cable winch is installed on one side of the cable logging vehicle, and a cable is wound and connected on the surface of the cable winch. The cable is a single-core, multi-core or optoelectronic composite cable.

[0010] As a preferred technical solution of the present invention, the oil pipe is replaced by a drill pipe or other operating pipe string.

[0011] As a preferred technical solution of the present invention, the bottom end of the oil pipe water-through limit device is connected to the bottom end of an oil pipe located at the lowest end.

[0012] As a preferred technical solution of the present invention, one side of the instrument water-through limit device is fixedly connected to one side of the visual detection instrument to ensure that the instrument will not completely go out of the oil pipe channel, avoiding the risk of the instrument being unable to be recovered.

[0013] As a preferred technical solution of the present invention, the top of the wellhead tee is connected to the bottom of the wellhead blowout preventer, the bottom of the wellhead tee is connected to the end opposite the oil pipe, one side of the wellhead tee is connected to a pump truck, and an interface is provided on the surface of the pump truck.

[0014] The present invention provides a method for using a wellbore video imaging detection device for real-time processing of well fluid, comprising the following steps:

[0015] Step 1: Lowering the oil pipe: After confirming the real-time well fluid processing wellbore video imaging detection equipment and the points to be detected, install the oil pipe water-through limiter at the bottom of the oil pipe before lowering the first oil pipe, and lower the oil pipes one by one to a distance of 1-2 meters above the target detection position;

[0016] Step 2, wellhead device connection: connect the wellhead tee at the wellhead oil pipe interface, pass the logging cable through the wellhead blowout preventer, connect the manufactured cable to the bridle, connect the visual detection instrument, visual detection ground equipment and depth recording system, test the equipment to work properly, observe the video image in real time through the visual detection ground equipment, and display the depth information on the image, hoist the instrument near the wellhead, and connect the wellhead blowout preventer at the upper end of the wellhead tee;

[0017] Step 3: Instrument lowering: lower the visualization detection instrument to the target section through the logging cable;

[0018] Step 4: Circulate and flush the test target: Visually reach the test target position, observe through real-time ground video images, if the well fluid at the test target position does not meet the test conditions, turn on the pump truck to flush the test target position with a large displacement until the well fluid at the target position meets the test conditions;

[0019] Step 5: Visual detection video shooting: Use the visual detection instrument to shoot high-definition video images of the detection target position;

[0020] Step 6: Complete the test and lift the instrument: After the test target is completed, lift the visual detector to the wellhead;

[0021] Step 7: Dismantle the wellhead device: dismantle the wellhead blowout preventer and take out the visual detection instrument;

[0022] Step 8. Lift out the oil pipes: lift the oil pipes out of the ground one by one to complete the operation.

[0023] As a preferred technical solution of the present invention, the target section to be detected in step three is specifically a vertical well detection, and the visualization detection instrument is lowered to the target position by its own weight. In horizontal well detection, the visualization detection instrument cannot be completely lowered to the target detection position by its own weight. When the instrument cannot be lowered, the pump truck is turned on and the visualization detection instrument is transported to the horizontal section detection target position by hydraulic pumping.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This method is suitable for visual inspection of vertical wells and horizontal wells. In the process of real-time visual inspection, the well fluid environment of the target inspection position is cleaned so that the clarity of the acquired video image meets the inspection requirements. In horizontal well operations, this method not only ensures that the well fluid meets the inspection conditions, but also serves as a visual inspection equipment delivery method, while ensuring the success rate of complex well operations in horizontal wells.

[0026] The visual inspection operation is performed by using the wellbore video imaging detection method with real-time well fluid processing. When the well fluid does not meet the inspection conditions, there is no need to repeatedly raise and lower the tubing string. The target section of the operation can be cleaned by circulating the oil pipe channel at a large volume, which shortens the operation cycle, saves operation costs, and improves the success rate of visual video inspection. The wellbore video imaging detection method with real-time well fluid processing is a horizontal well inspection and transportation method that can ensure transportation to the target location and circulate and clean the operation target. At the same time, there are real-time video images on the ground, which ensures the safety and success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a flow chart diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the device connection relationship of the present invention;

[0029] Figure 3 The target image before processing of the present invention;

[0030] Figure 4 This is the image before processing of the present invention.

[0031] In the figure: 1. Cable logging vehicle; 2. Visual detection surface equipment; 3. Cable winch; 4. Depth recording system; 5. Cable; 6. Wellhead blowout preventer; 7. Sewage truck; 8. Pump truck; 9. Clean water truck and clean water; 10. Wellhead tee; 11. Oil pipe; 12. Visual detection instrument; 13. Instrument water limit device; 14. Oil pipe water limit device; 15. Visual instrument lens; 16. Point to be detected. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-4The present invention provides a wellbore video imaging detection device for real-time processing of well fluid, including the wellbore video imaging detection device, the wellbore video imaging detection device includes ground equipment, wellhead device and downhole equipment, the ground equipment includes a pump truck 8, a cable logging truck 1, a clean water truck and clean water 9, a sewage truck 7, a visual detection ground equipment 2 and a depth recording system 4, the wellhead device includes a wellhead blowout prevention device 6 and a wellhead tee 10, the downhole equipment includes an oil pipe 11, a visual detection instrument 12, an oil pipe water-through limit device 14 and an instrument water-through limit device 13, and a visual instrument lens 15 is fixedly installed at the front end of the visual detection instrument 12.

[0034] A cable winch 3 is installed at one side of the cable logging vehicle 1. A cable 5 is wound around the surface of the cable winch 3. The cable 5 is a single-core, multi-core or optoelectronic composite cable.

[0035] The oil pipe 11 is replaced by a drill pipe or other working pipe string.

[0036] The bottom end of the oil pipe water-through limiter 14 is connected to the bottom end of the oil pipe 11 at the lowest end.

[0037] One side of the instrument water-through limit device 13 is fixedly connected to one side of the visual detection instrument 12 to ensure that the instrument will not completely go out of the oil pipe 11 channel, thereby avoiding the risk of the instrument being unable to be recovered.

[0038] The top of the wellhead tee 10 is connected to the bottom of the wellhead blowout preventer 6, and the bottom of the wellhead tee 10 is connected to the end directly opposite to the oil pipe 11. One side of the wellhead tee 10 is connected to the pump truck 8, and an interface is provided on the surface of the pump truck 8.

[0039] The present invention provides a method for using a wellbore video imaging detection device for real-time processing of well fluid, comprising the following steps:

[0040] Step 1, lowering the oil pipe: After determining the real-time processing wellbore video imaging detection equipment and the point to be detected 16, before the first oil pipe 11 is lowered, the oil pipe water limiter 14 is installed at the bottom of the oil pipe 11, and the oil pipes 11 are lowered one by one to a distance of 1-2 meters above the target detection position;

[0041] Step 2, wellhead device connection: connect the wellhead tee 10 at the wellhead oil pipe 11 interface, pass the logging cable 5 through the wellhead blowout preventer 6, connect the manufactured cable 5 to the bridle, connect the visual detection instrument 12, visually detect the ground equipment 2 and the depth recording system 4, test that the equipment works normally, observe the video image in real time through the visual detection ground equipment 2, and display the depth information on the image, hoist the instrument near the wellhead, and connect the wellhead blowout preventer 6 at the upper end of the wellhead tee 10;

[0042] Step 3: Instrument lowering: lowering the visualization detection instrument 12 to the target section for detection via the logging cable 5;

[0043] Step 4: Circulate and flush the test target: Visually reach the test target position, observe through real-time ground video images, if the well fluid at the test target position does not meet the test conditions, open the 8-volume pump truck to flush the test target position until the well fluid at the target position meets the test conditions;

[0044] Step 5: Visual detection video shooting: using the visual detection instrument 12 to shoot a high-definition video image of the detection target position;

[0045] Step 6: Complete the test and lift the instrument: After the test target is completed, lift the visual detector to the wellhead;

[0046] Step 7: Dismantle the wellhead device: dismantle the wellhead blowout prevention device 6 and take out the visual detection instrument 12;

[0047] Step 8: Lifting the oil pipes 11: Lift the oil pipes 11 out of the ground one by one to complete the operation.

[0048] In step three, the target section to be detected is specifically a vertical well detection. The visualization detection instrument 12 is lowered to the target position by its own weight during the detection of a horizontal well. In the detection of a horizontal well, the visualization detection instrument 12 cannot be completely lowered to the target detection position by its own weight. When the instrument cannot be lowered, the pump truck 8 is turned on to transport the visualization detection instrument 12 to the target position for the horizontal section detection by hydraulic pumping.

[0049] In the present invention, after determining the real-time processing wellbore video imaging detection equipment and the point to be detected 16 of the well fluid, before the first oil pipe 11 is lowered, the oil pipe water-through limit device 14 is installed at the bottom of the oil pipe 11, and the oil pipes 11 are lowered one by one to a distance of 1-2 meters above the target detection position; the wellhead tee 10 is connected to the wellhead oil pipe 11 interface, and the logging cable 5 is passed through the wellhead blowout prevention device 6, the manufactured cable 5 is connected to the bridle, and the visualization detection instrument 12 is connected to the visualization detection ground equipment 2 and the depth recording system 4. The test equipment works normally, and the video image is observed in real time through the visualization detection ground equipment 2, and the depth information is displayed on the image. The instrument is hoisted near the wellhead, and the wellhead blowout prevention device 6 is connected to the upper end of the wellhead tee 10; the visualization detection instrument 12 is lowered to the detection target section through the logging cable 5. In the vertical well detection, the visualization detection instrument 12 is lowered to the target position by its own weight. In the horizontal well detection, the visualization detection instrument 12 cannot be completely lowered by its own weight. The weight of the body is lowered to the target detection position. When the instrument cannot be lowered, the pump truck 8 is opened, and the visualization detection instrument 12 is transported to the horizontal section detection target position by hydraulic pumping; the detection target position is visually reached, and the real-time video image is observed on the ground. If the well fluid at the detection target position does not meet the detection conditions, the pump truck 8 is opened to flush the detection target position with a large displacement until the well fluid at the target position meets the detection conditions; a high-definition video image of the detection target position is captured by the visualization detection instrument 12 to complete the detection target, lift the visualization detector to the wellhead, disassemble the wellhead blowout preventer 6, take out the visualization detection instrument 12, and lift the oil pipes 11 out of the ground one by one to complete the operation. The coupling is tripped incorrectly, the wellbore is blocked by fish falling in the well, the wellbore is seriously damaged, the coupling is tripped, the wellbore pipe string is abnormal, the direct observation target is covered or the wellbore light transmittance is poor, and an effective video image cannot be obtained. After the wellbore visualization detection method for real-time processing of the wellbore by the wellbore fluid is used, the wellbore image is clear. Combined with the instructions attached Figure 3 The left side shows the image before processing. The target is blocked. Figure 3 The right side shows the processed image with clear target. Figure 4 The image on the left is completely unclear before processing. Figure 4 The right side shows the processed image with a clear wellbore image.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wellbore video imaging detection device for real-time processing of well fluid, comprising a wellbore video imaging detection device, characterized in that: The wellbore video imaging detection equipment comprises ground equipment, a wellhead device and downhole equipment, wherein the ground equipment comprises a pump truck (8), a cable logging truck (1), a clean water truck and clean water (9), a sewage truck (7), a visual detection ground equipment (2) and a depth recording system (4), the wellhead device comprises a wellhead blowout prevention device (6) and a wellhead tee (10), and the downhole equipment comprises an oil pipe (11), a visual detection instrument (12), an oil pipe water-through limit device (14) and an instrument water-through limit device (13), and a visual instrument lens (15) is fixedly installed at the front end of the visual detection instrument (12).

2. The real-time wellbore video imaging detection device for well fluid processing according to claim 1 is characterized by: A cable winch (3) is installed on one side of the cable logging vehicle (1), and a cable (5) is wound around the surface of the cable winch (3), and the cable (5) is a single-core, multi-core or optoelectronic composite cable.

3. The real-time wellbore video imaging detection device for well fluid processing according to claim 1 is characterized in that: The oil pipe (11) is replaced by a drill pipe or other operating pipe string.

4. The real-time wellbore video imaging detection device for well fluid processing according to claim 1 is characterized in that: The bottom end of the oil pipe water-through limiting device (14) is connected to the bottom end of the oil pipe (11) located at the lowest end.

5. The real-time wellbore video imaging detection device for well fluid processing according to claim 1 is characterized by: One side of the instrument water-through limit device (13) is fixedly connected to one side of the visual detection instrument (12), thereby ensuring that the instrument will not completely go out of the oil pipe (11) channel, thereby avoiding the risk of the instrument being unable to be recovered.

6. The real-time wellbore video imaging detection device for well fluid processing according to claim 1 is characterized by: The top end of the wellhead tee (10) is connected to the bottom end of the wellhead blowout prevention device (6), the bottom end of the wellhead tee (10) is connected to an end directly opposite to the oil pipe (11), one side of the wellhead tee (10) is connected to a pump truck (8), and an interface is provided on the surface of the pump truck (8).

7. The method for using the wellbore video imaging detection device for real-time well fluid processing according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, lowering the oil pipe: after determining the real-time wellbore video imaging detection equipment for processing well fluid and the point to be detected (16), before lowering the first oil pipe (11), install the oil pipe water-through limiter (14) at the bottom of the oil pipe (11), and lower the oil pipes (11) one by one to a distance of 1-2 meters above the target detection position; Step 2, wellhead device connection: connect the wellhead tee (10) at the wellhead oil pipe (11) interface, pass the logging cable (5) through the wellhead blowout prevention device (6), connect the manufactured cable (5) to the bridle, connect the visual detection instrument (12), the visual detection ground equipment (2) and the depth recording system (4), test the equipment to be working properly, observe the video image in real time through the visual detection ground equipment (2), and display the depth information on the image, hoist the instrument near the wellhead, and connect the wellhead blowout prevention device (6) at the upper end of the wellhead tee (10); Step 3: Instrument lowering: lowering the visualization detection instrument (12) to the target section for detection via the logging cable (5); Step 4: Circulate and flush the test target: Visually reach the test target position, observe through the ground real-time video image, if the well fluid at the test target position does not meet the test conditions, open the pump truck (8) to flush the test target position with a large displacement until the well fluid at the target position meets the test conditions; Step 5: Visual detection video shooting: using a visual detection instrument (12) to shoot a high-definition video image of the detection target position; Step 6: Complete the test and lift the instrument: After the test target is completed, lift the visual detector to the wellhead; Step 7: Dismantle the wellhead device: dismantle the wellhead blowout prevention device (6) and take out the visual detection instrument (12); Step 8: Lifting the oil pipes (11): Lift the oil pipes (11) out of the ground one by one to complete the operation.

8. The method for using the real-time well fluid processing wellbore video imaging detection device according to claim 7, characterized in that: In the step 3, the target section to be detected is specifically a vertical well detection, in which the visual detection instrument (12) is lowered to the target position by its own weight. In the horizontal well detection, the visual detection instrument (12) cannot be completely lowered to the target detection position by its own weight. When the instrument cannot be lowered, the pump truck (8) is turned on and the visual detection instrument (12) is transported to the horizontal section detection target position by hydraulic pumping.

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