Solvent lifting and soaking well testing method for well with high wax content

Abstract

The invention discloses a well testing method for high-wax-content well solvent lifting and soaking, which comprises the following steps of: pumping a wax dissolving agent between a drifting steel wire tool string and the inner wall of an oil pipe after the drifting steel wire tool string is put into the oil pipe and encounters resistance when the drifting steel wire tool string is put into the oil pipe; the method comprises the following steps of: soaking and dissolving a wax ring between a drifting steel wire tool string and the inner wall of an oil pipe by using a wax dissolving agent, drifting, putting a test tool string along the oil pipe to meet resistance, pumping the wax dissolving agent between the test tool string and the inner wall of the oil pipe, and soaking and dissolving the wax ring between the test tool string and the inner wall of the oil pipe by using the wax dissolving agent. A dissolving cavity structure is formed between a drifting steel wire tool string or a testing tool string and the inner wall of an oil pipe, and a wax dissolving agent is put into the dissolving cavity structure to dissolve wax, so that the consumption of the wax dissolving agent can be reduced, the wax dissolving agent is dissolved from the upper end of a wax ring, the utilization rate of the wax dissolving agent is greatly improved, and the problems that the tool string is blocked and clamped and a testing tool falls off are effectively solved; the operation risk and cost are effectively reduced, and the data recording success rate is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas reservoir construction, and particularly relates to a solvent lifting and immersion well testing method for a high-wax content well. Background Art

[0002] In the process of development and production of oil and gas reservoirs, in order to deepen geological understanding, assist in efficient development of blocks, support reserve declaration and plan preparation, it is necessary to conduct dynamic monitoring of oil and gas reservoirs and carry out data collection, including but not limited to formation pressure and temperature monitoring, production and injection profile monitoring and other means. In some jurisdictions, gas reservoirs are buried deep (8271m), with high pressure (144MPa), high wax content (18.83%), and complex fluid phases. Due to the influence of wax on the wellbore, there are difficulties and challenges in the collection of dynamic monitoring data. In the past three years, 63 wells have been dynamically monitored, 37 wells have encountered obstructions, and 38 wells have been successful, with a success rate of 60%. There have also been cases where the wire tool string encountered obstruction during the well test operation, and the wire tool string twisted up during the processing process, causing it to fall into the well, making downhole operations complicated and even affecting oil and gas production.

[0003] For high wax content wells, in order to improve the success rate of data acquisition, the method of continuous tubing dredging + wireline well testing or continuous tubing dredging + continuous tubing well testing is usually adopted. However, the above technical methods have problems such as long cycle, high cost, and slow team organization.

[0004] At present, in order to save production costs, when the steel wire well dredging + steel wire well testing method is adopted, the tool string is usually pulled up to the wellhead after encountering obstruction, and a wax dissolving agent is pumped into the wellbore, such as Figure 4 As shown, after dissolving the wellbore blockage, the wireline tool string is lowered. This method has the problem of high consumption of wax dissolving agent and high cost, and also has low dissolution efficiency, resulting in the problem of obstruction and jamming in the secondary well test. Therefore, it is necessary to optimize the wireline casting and fishing well test technology in a targeted manner to improve the success rate of the well test operation and meet the needs of geological data acquisition. Summary of the invention

[0005] The purpose of the present invention is to provide a solvent lifting immersion well testing method for high wax content wells, so as to overcome the problems of existing tool string encountering obstruction, jamming and test tool falling, effectively reduce operation risks and costs, and improve the success rate of data acquisition.

[0006] A solvent lifting and immersion well testing method for a high wax content well comprises the following steps:

[0007] The steel wire tool string is placed into the oil pipe. When the steel wire tool string encounters resistance, a wax dissolving agent is pumped into the space between the steel wire tool string and the inner wall of the oil pipe. The wax dissolving agent is used to soak and dissolve the wax ring between the steel wire tool string and the inner wall of the oil pipe. The well cleaning work is completed and the steel wire tool string is taken out.

[0008] Then put the test tool string along the oil pipe. When the test tool string encounters resistance, pump wax dissolving agent between the test tool string and the inner wall of the oil pipe, and use the wax dissolving agent to soak and dissolve the wax ring between the test tool string and the inner wall of the oil pipe. When the test tool string reaches the set position for testing, retrieve the test tool string to complete the well testing.

[0009] Preferably, the maximum diameter of the well-drilling wire tool or the testing tool string is smaller than the inner diameter of the oil pipe.

[0010] Preferably, a tension test is performed during the lowering process of the test tool string or the well-draining steel wire tool string to determine whether the test tool string or the well-draining steel wire tool string encounters any obstruction.

[0011] Preferably, after reaching the set position, the tension value of the test tool string or the well-clearing wire tool string at the current position is obtained. If the tension value of the test tool string or the well-clearing wire tool string at the current position is less than the set threshold, it indicates whether the test tool string or the well-clearing wire tool string encounters resistance, otherwise there is no resistance.

[0012] Preferably, the blowout prevention equipment installed at the wellhead is pressure tested before the well test.

[0013] Preferably, after the pressure test is qualified, the pressure is released to the equilibrium pressure, and after the pressure in the blowout preventer is balanced with the pressure in the well, the blowout preventer system is fully opened while ensuring that it is sealed and leak-free.

[0014] Preferably, when the well-draining steel wire tool string is placed into the oil pipe for well-draining, the speed does not exceed 10 m / min within 50 m from the wellhead during the lowering process, and the speed does not exceed 15 m / min at 100 m from the variable diameter position or the target position.

[0015] Preferably, the speed of the well-draining steel wire tool string during the process of lifting it from the oil pipe does not exceed 70m / min.

[0016] Preferably, when the test tool string is placed in the oil pipe for well drilling, the speed does not exceed 10 m / min within 50 m from the wellhead during the lowering process, and does not exceed 15 m / min at 100 m from the variable diameter position or the target position.

[0017] Preferably, the speed of lifting the test tool string from the oil pipe does not exceed 70 m / min.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The invention provides a solvent lifting and soaking well testing method for a high-wax well, which comprises the following steps: placing a well-clearing steel wire tool string into an oil pipe, and when the well-clearing steel wire tool string encounters resistance, a wax dissolving agent is pumped between the well-clearing steel wire tool string and the inner wall of the oil pipe, and the wax dissolving agent is used to soak and dissolve the wax ring between the well-clearing steel wire tool string and the inner wall of the oil pipe, and the well-clearing work is completed, and the well-clearing steel wire tool string is taken out; and then the test tool string is placed into the oil pipe, and when the test tool string encounters resistance, a wax dissolving agent is pumped between the test tool string and the inner wall of the oil pipe, and the wax dissolving agent is used to soak and dissolve the wax ring between the test tool string and the inner wall of the oil pipe. The well test is completed by immersing and dissolving. When the test tool string reaches the set position for testing, the test tool string is retrieved. The dissolution cavity structure is formed between the well-through wire tool string or the test tool string and the inner wall of the oil pipe, and a wax dissolving agent is put in to dissolve the wax. This can reduce the consumption of the wax dissolving agent and dissolve from the upper end of the wax ring, which also greatly improves the utilization rate of the wax dissolving agent. The well-through wire tool string or the test tool string can be lowered or lifted as soon as possible after the wax is dissolved, effectively solving the problems of the tool string encountering obstruction, jamming, and the test tool falling, effectively reducing the operation risk and cost, and improving the success rate of data acquisition.

[0020] Preferably, the maximum diameter of the well-draining wire tool or the testing tool string used is smaller than the inner diameter of the oil pipe, so as to avoid the problem of clamping caused by the oil pipe having a too small inner diameter during the lowering process.

[0021] Preferably, when the well-clearing wire tool or test tool string is placed in the oil pipe for well-clearing, it is lowered and raised at a set speed, and the tension data of the well-clearing wire tool or test tool string can be accurately obtained, so that the wax dissolving operation can be carried out in time to improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the process of the solvent lifting and immersion well testing method for high wax content wells in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of wax plugging in a high-wax content wellbore in an embodiment of the present invention.

[0024] Figure 3 Schematic diagram of wellbore blockage after tool string operation in a high-wax well encounters an obstacle in an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the wellbore for pumping wax dissolving agent using the existing method.

[0026] Figure 5 Schematic diagram of solvent lifting and immersion of a high wax content well in an embodiment of the present invention.

[0027] In the figure, 1. casing, 2. tubing, 3. wax ring, 4. packer, 5. perforating section, 6. casing shoe, 7. oil and gas reservoir, 8. wax dissolving agent, and 9. tool string. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] like Figure 1 As shown, the present invention provides a solvent lifting and immersion well testing method for high wax content wells, which is used in the process of wireline well testing operations to solve the problems of tool string encountering obstruction, jamming, and test tool falling, effectively reduce the operation risk and cost, and improve the success rate of data acquisition; specifically, it includes the following steps:

[0031] The well-draining steel wire tool string is placed in the oil pipe 2. When the well-draining steel wire tool string encounters resistance, a wax dissolving agent is pumped between the well-draining steel wire tool string and the inner wall of the oil pipe 2. The wax dissolving agent is used to soak and dissolve the wax ring 3 between the well-draining steel wire tool string and the inner wall of the oil pipe 2. The well-draining work is completed, and the well-draining steel wire tool string is taken out;

[0032] Then put the test tool string along the oil pipe 2. When the test tool string encounters resistance, pump wax dissolving agent between the test tool string and the inner wall of the oil pipe 2. Use the wax dissolving agent to soak and dissolve the wax ring 3 between the test tool string and the inner wall of the oil pipe 2. When the test tool string reaches the set position for testing, retrieve the test tool string to complete the well testing.

[0033] like Figure 2As shown, in the oil and gas reservoir well targeted by the present application, a casing 1 is buried in the oil and gas reservoir 7 area, an oil pipe 2 is arranged in the casing 1, and a casing shoe 6 is arranged on the outer side of the bottom of the casing 1 to increase the stability of the installation of the casing 1; the lower end of the casing 1 is located in the oil and gas reservoir 7 area as a perforation section 5, which is provided with multiple perforations, and a packer 4 is arranged on the upper end of the casing 1 located in the oil and gas reservoir 7.

[0034] The maximum diameter of the well-draining wire tool or test tool string used is smaller than the inner diameter of the oil pipe 2 ; during the lowering process, the problem of clamping caused by the oil pipe 2 having a too small inner diameter is avoided.

[0035] This application is based on the dynamic monitoring plan and data collection plan of the reservoir department, and targets gas wells with high wax content in the condensate oil of the block, complex wellbore fluid properties, and easy wax plugging, aromatic hydrocarbon plugging, and mixed plugging in the wellbore to carry out wireline well testing operations.

[0036] During the process of lowering the test tool string or the well-draining wire tool string, the wax on the inner wall of the tubing will accumulate at the end of the test tool string or the well-draining wire tool, as shown in Figure 3, forming a wax ring accumulation structure. At this time, the lowering of the test tool string or the well-draining wire tool string encounters too much resistance, and wax dissolving treatment is required. Figure 5 As shown, a wax dissolving agent is pumped into the space between the tool string and the inner wall of the oil pipe, and the wax dissolving agent is used to soak and dissolve the wax ring between the tool string and the inner wall of the oil pipe to complete the well cleaning work; after the wax dissolving treatment is completed, when the test tool string or the well cleaning wire tool string successfully reaches the set position, the test tool string or the well cleaning wire tool string is lifted to detect the situation of the tool passing through the variable diameter.

[0037] During the lowering process of the test tool string or the well-draining steel wire tool string, a tension test is used to determine whether the test tool string or the well-draining steel wire tool string encounters resistance. Specifically, the following steps are used:

[0038] After reaching the set position, obtain the tension value of the test tool string or the well-through wire tool string at the current position. If the tension value of the test tool string or the well-through wire tool string at the current position is less than the set threshold, it indicates whether the test tool string or the well-through wire tool string encounters resistance, otherwise there is no resistance.

[0039] In one embodiment of the present application, the tension is tested every 100 m from the set lower depth position (180-220 m), and the tension change is calculated to ensure that the tool can be safely pulled out within the limit tension range.

[0040] Construction preparations are required before well testing: preparation of well testing winch, preparation of blowout prevention equipment, preparation of downhole tool string, installation of equipment and pressure testing.

[0041] Preparation of well test winch: The winch drum adopts φ3.8mm anti-sulfur steel wire, and the tension meets the requirements of this construction. It is used to hoist the well-through wire tool string and the test tool string.

[0042] The well test winch is driven by a hydraulic drive device. It is necessary to check that the hydraulic oil is in the standard position: above 2 / 3 of the scale.

[0043] The connecting pipes of the well test winch drive device are firm and leak-free, and the power supply lines are reliably connected without short circuit or open circuit;

[0044] Check that the metering device of the well test winch is in good condition, the tension is accurate, and the control valves are flexible and easy to use;

[0045] Check that the winch meets the operating requirements.

[0046] Blowout prevention equipment preparation:

[0047] Select wellhead blowout prevention equipment with a pressure resistance level of 105MPa or above;

[0048] Conduct base pressure test on blowout prevention equipment to ensure that the blowout prevention equipment is qualified;

[0049] Ensure that the steel wire blowout preventer of the blowout prevention equipment can be switched flexibly;

[0050] Install and connect the flange connector between the blowout prevention equipment and the wellhead to ensure the sealing of the connection;

[0051] Various control pipelines and hand pumps supporting the blowout prevention equipment are ready in place.

[0052] Preparation of downhole tool string: including test tool string and well-through wireline tool string;

[0053] The well-draining wire tool string includes a wire rope cap, a universal joint, a weight rod, a jar and a well-draining gauge, which are hoisted by a well test winch to form a well-draining wire tool string.

[0054] The test tool string includes a wire rope cap, a weight rod, a pressure gauge holder and a landing joint.

[0055] Prepare the wire rope cap that matches the wire, and fix the wire nut to the front end of the well-drilling wire tool string;

[0056] Prepare weight rods of sufficient weight according to construction requirements and check that the weight rods are securely connected;

[0057] The pressure gauge is confirmed to be within the calibration validity period, intact and without damage, and the program is compiled according to the test requirements.

[0058] Before inserting the well-draining wire tool string or test tool string into the well, the test engineer shall take photos for archiving and clearly record the instrument number, size, and buckle type. The tool string may only be inserted into the well after on-site confirmation by the test monitoring technician in the operation area.

[0059] Equipment installation and pressure testing:

[0060] a. Place the well test winch at a set distance from the wellhead. In this application, the distance from the wellhead is set to be 15m-25m, and the center of the drum of the well test winch is facing the wellhead;

[0061] b. Check the connection between the blowout preventer pipeline and the test tool string or well-draining wire tool string as required;

[0062] c. Connect the blowout preventer and the choke pipe in series (the blowout preventer with a vent valve should be connected to the lower end of the blowout preventer string);

[0063] d. Install the connecting flange and wire blowout preventer above the wax cleaning gate;

[0064] e. Test the surface pressure to 1.2 times of the wellhead pressure and maintain the pressure steady for 30 minutes;

[0065] f. After the blowout prevention equipment is connected to the wellhead, the anchor and guy rope are fixed, and the pressure test pipeline is connected;

[0066] g. Use a grease injection pump to pump sealing grease into the wellhead to 1.2 times the wellhead pressure to seal the blowout prevention equipment;

[0067] h. Use a pressure test pump to test the wellhead blowout prevention equipment, slowly pressurize it in stages, and keep the pressure steady for 5 minutes at each stage, and keep the pressure steady for 15 minutes at the last stage. Use soapy water to check if there is any leakage, and it is qualified;

[0068] i. After the pressure test is passed, slowly open the pressure relief valve to release the pressure until it is the same as the wellhead pressure, then close the inlet needle valve to release the pressure of the pressure test pump to zero.

[0069] After the pressure test is qualified, the well will be opened first and then tested.

[0070] After the pressure test is passed, release the pressure to the equilibrium pressure, slowly open the test gate, and after the pressure in the blowout preventer is balanced with the pressure in the well, fully open it after ensuring that the blowout preventer system is sealed and leak-free. During this period, accurately record the number of opening and closing cycles as the basic number for normal valve opening and closing.

[0071] When placing the well-draining steel wire tool string into the oil pipe 2 for well-draining, the lifting and lowering speed requirements of the well-draining steel wire tool string are as follows: during the lowering process: the speed within 50m from the wellhead shall not exceed 10m / min, and the speed at 100m from the variable diameter position or the target position shall not exceed 15m / min; during the lifting process, the speed shall not exceed 70m / min;

[0072] During the process of lowering the well-draining wire tool string, wax dissolution treatment is required to prevent obstruction or jamming. After the wax dissolution treatment is completed, when the well-draining wire tool string successfully reaches the set position, the well-draining wire tool string is lifted, and the tool is tested for diameter change. From the set lower depth position (180-220m), the tension is tested every 100m, and the tension change is calculated to ensure that the tool can be safely lifted out within the limit tension range.

[0073] Specifically: When the well-draining wire tool string encounters an obstruction during the lowering process, the well-draining wire tool string is placed at the obstruction position, and a wax dissolving agent is pumped between the well-draining wire tool string and the inner wall of the oil pipe, so that the wax dissolving agent slides along the gap between the outer wall of the well-draining wire tool string and the inner wall of the oil pipe, and the wax ring is dissolved by lifting and immersing, thereby solving the problem of wellbore blockage and ensuring that the well-draining wire tool string can be lowered normally.

[0074] Release the test tool string: After the solvent lifting and soaking is successful, the well-clearing process is completed. After the well-clearing wire tool string is taken out, the test tool string is released:

[0075] Connect and place the test tool string: After the wire rope cap (φ38mm), weight rod (φ50mm), pressure gauge bracket (φ45mm) and landing joint (φ52mm) are connected and fixed in sequence, the test tool string is pulled or lifted into the blowout preventer, and the blowout preventer string is connected to the wire blowout preventer for pressure testing;

[0076] After the pressure test is qualified, the wax cleaning gate is fully opened, and the test tool string is lowered to measure the gradient at a speed not exceeding 50m / min;

[0077] During the process of lowering the test tool string, wax dissolution treatment is required to prevent obstruction or jamming. After the wax dissolution treatment is completed, when the test tool string reaches the set position smoothly, the test tool string is lifted and the tool is tested for diameter change. From the set lower depth position (180-220m), the test tension is increased every 100m, and the tension change is calculated to ensure that the test tool string can be safely lifted out within the limit tension range.

[0078] Specifically: When the test tool string encounters an obstruction during the lowering process, the test tool string is placed at the obstruction position, and a wax dissolving agent is pumped into the gap between the test tool string and the inner wall of the oil pipe, so that the wax dissolving agent slides along the gap between the outer wall of the test tool string and the inner wall of the oil pipe, and the wax ring is dissolved by lifting and immersing, thereby solving the problem of wellbore blockage and ensuring that the test tool string can be lowered normally.

[0079] Get the test tool string:

[0080] Connect the pressure gauge fishing tool string: wire rope cap (φ38mm) + tungsten steel weight rod (φ50mm) + jar (φ45mm) + JDC (φ46mm); pull or lift the test tool string into the blowout preventer, connect the blowout preventer string to the wireline blowout preventer (BOP), and then conduct a pressure test. After the pressure test is qualified, fully open the wax cleaning gate, lower the pressure gauge fishing tool to fish out the pressure gauge, and after the pressure gauge is successfully fished out, lift it up to measure the gradient. After the test is completed, restore the wellhead and the test is completed. If the pressure gauge fishing test tool string encounters resistance during the lowering process, execute the steps of pumping wax dissolving agent between the tool string and the inner wall of the oil pipe, and using the wax dissolving agent to soak and dissolve the wax ring between the tool string and the inner wall of the oil pipe until the test tool is successfully fished out and the construction is completed.

[0081] The above-disclosed well testing method of solvent lifting and immersion for high-wax wells of the present invention comprises the following steps: placing a well-clearing steel wire tool string into an oil pipe, and when the well-clearing steel wire tool string encounters resistance, a wax dissolving agent is pumped between the well-clearing steel wire tool string and the inner wall of the oil pipe, and the wax dissolving agent is used to soak and dissolve the wax ring between the well-clearing steel wire tool string and the inner wall of the oil pipe, and the well-clearing work is completed, and the well-clearing steel wire tool string is taken out; then the test tool string is placed along the oil pipe, and when the test tool string encounters resistance, a wax dissolving agent is pumped between the test tool string and the inner wall of the oil pipe, and the wax dissolving agent is used to soak and dissolve the wax ring between the test tool string and the inner wall of the oil pipe. The well test is completed by immersing and dissolving. When the test tool string reaches the set position for testing, the test tool string is retrieved. The dissolution cavity structure is formed between the well-through wire tool string or the test tool string and the inner wall of the oil pipe, and a wax dissolving agent is put in to dissolve the wax. This can reduce the consumption of the wax dissolving agent and dissolve from the upper end of the wax ring, which also greatly improves the utilization rate of the wax dissolving agent. The well-through wire tool string or the test tool string can be lowered or lifted as soon as possible after the wax is dissolved, effectively solving the problems of the tool string encountering obstruction, jamming, and the test tool falling, effectively reducing the operation risk and cost, and improving the success rate of data acquisition.

Claims

1. A solvent lifting and soaking well testing method for high wax content wells. It is characterized in that The following steps are involved: The steel wire tool string is placed into the oil pipe. When the steel wire tool string encounters resistance, a wax dissolving agent is pumped into the space between the steel wire tool string and the inner wall of the oil pipe. The wax dissolving agent is used to soak and dissolve the wax ring between the steel wire tool string and the inner wall of the oil pipe. The well cleaning work is completed and the steel wire tool string is taken out. Then put the test tool string along the oil pipe. When the test tool string encounters resistance, pump wax dissolving agent between the test tool string and the inner wall of the oil pipe, and use the wax dissolving agent to soak and dissolve the wax ring between the test tool string and the inner wall of the oil pipe. When the test tool string reaches the set position for testing, retrieve the test tool string to complete the well testing.

2. A solvent lifting and immersion well testing method for high wax content wells according to claim 1, It is characterized in that The maximum diameter of the well-draining wireline tool or the test tool string is smaller than the inner diameter of the oil pipe.

3. A solvent lifting and immersion well testing method for a high wax content well according to claim 1, It is characterized in that During the lowering process of the test tool string or the well-draining steel wire tool string, a tension test is used to determine whether the test tool string or the well-draining steel wire tool string encounters resistance.

4. A solvent lifting and immersion well testing method for high wax content wells according to claim 3, It is characterized in that After reaching the set position, obtain the tension value of the test tool string or the well-through wire tool string at the current position. If the tension value of the test tool string or the well-through wire tool string at the current position is less than the set threshold, it indicates whether the test tool string or the well-through wire tool string encounters resistance, otherwise there is no resistance.

5. The solvent lifting and soaking well testing method for high wax content wells according to claim 1, It is characterized in that Before well testing, the blowout prevention equipment installed at the wellhead is pressure tested.

6. A solvent lifting and immersion well testing method for high wax content wells according to claim 1, It is characterized in that After the pressure test is passed, the pressure is released to the equilibrium pressure. After the pressure in the blowout preventer is balanced with the pressure in the well, it is fully opened after ensuring that the blowout preventer system is sealed and leak-free.

7. The solvent lifting and soaking well testing method for high wax content wells according to claim 1, It is characterized in that When placing the well-draining wire tool string into the oil pipe for well-draining, the speed shall not exceed 10m / min within 50m from the wellhead during the lowering process, and shall not exceed 15m / min at 100m from the variable diameter position or the target position.

8. The solvent lifting and soaking well testing method for high wax content wells according to claim 1, It is characterized in that The speed of the well-draining wire tool string being lifted up from the oil pipe shall not exceed 70 m / min.

9. The solvent lifting and soaking well testing method for high wax content wells according to claim 1, It is characterized in that When the test tool string is placed in the oil pipe for well traversal, the speed shall not exceed 10 m / min within 50 m from the wellhead during the lowering process, and shall not exceed 15 m / min at 100 m from the variable diameter position or the target position.

10. The solvent lifting and soaking well testing method for high wax content wells according to claim 1, It is characterized in that The speed of lifting the test tool string from the oil pipe shall not exceed 70m / min.

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