Gas well full-well section foam drainage wellbore simulation test method and test device

Abstract

The present invention relates to a gas well full-segment foam drainage wellbore simulation test method and test device. The gas well full-segment foam drainage wellbore simulation test device comprises a support, a simulation container fixing part, a visual simulation container, and a locking part. The visual simulation container is rotatably assembled on the support through the simulation container fixing part. The angle of the visual simulation container can be adjusted. By adjusting the angle of the visual simulation container, each target segment of the full well segment is simulated, so as to obtain the test result of each target segment in the full well segment, and finally obtain the test result of the full well segment. The gas well full-segment foam drainage wellbore simulation test device and the gas well full-segment foam drainage wellbore simulation test method are used to simulate the well segment multiple times, which is more consistent with the real well segment and the device volume is small. The current simulation test device has a technical problem of large test result errors.

Description

Technical Field

[0001] The invention relates to a gas well full-well section foam drainage wellbore simulation test method and a test device. Background Art

[0002] Foam drainage and gas production technology is a commonly used drainage and gas production technology in gas fields, which is convenient and simple to implement. It is particularly important whether the performance of the foam drainage agent can meet the drainage needs of gas wells. The conventional foam drainage agent performance test is carried out using the Roche foam instrument. The Roche foam instrument can only be used for vertical wells, and it mainly focuses on the amount of foam generated, the foam defoaming speed, and the foam liquid carrying rate. This evaluation method has the following defects: it only focuses on the amount of foam generated, while ignoring the size of the foam flow resistance. As a non-Newtonian fluid, the friction coefficient of foam with the pipe wall is much greater than that of water. The pipe section length of horizontal wells is much longer than that of vertical wells. The friction pressure drop cannot be ignored. If the selected foam drainage agent has too high friction, even if the foaming ability is good, it is not conducive to reducing the wellbore pressure drop, and may even increase the wellbore pressure drop and inhibit formation gas production.

[0003] The Chinese patent with the authorization announcement number CN101539009B discloses a directional well foam drainage wellbore simulation test device, including two upper and lower simulation cylinders, namely a fixed section simulation cylinder and an adjustable section simulation cylinder, and the two sections of the simulation cylinder are sealed and connected by a flexible connecting cylinder. By changing the angle of the fixed section simulation cylinder, the wellbore structure of different gas wells can be simulated, which overcomes the shortcomings of the Roche bubble height meter and other test devices that cannot simulate the production state of the gas well. The directional wellbore is simulated from the aspects of airflow direction, geothermal environment, directional well deflection degree, etc., and the simulation problem of horizontal wells, vertical wells and directional wellbores is solved. In the process of horizontal well drilling, a three-section or five-section wellbore structure is generally used in the transition process from the vertical well section to the horizontal well section. The transition section between the vertical well section and the horizontal well section changes relatively slowly. When the above-mentioned simulation experimental device is used to simulate the horizontal well, the turn at the connection of the two sections of the simulation cylinder is sharp, which is quite different from the actual change of the real well section. In addition, the length of conventional horizontal wells is between 2000-5000m, and the outer diameters of the oil pipes used in production are 60.3mm, 73mm, 88.9mm, and 114.3mm. The ratio of the wellbore length to the production oil pipe exceeds 17500:1. If the outer diameter of the simulated wellbore is 50mm, the simulated section length should be 875m, which is equivalent to the length of 9.7 football fields. However, it is difficult to meet the actual full well section ratio requirements in the actual test process. For the above reasons, the above simulation test device has the problem of large errors in the test results. Summary of the invention

[0004] The purpose of the present invention is to provide a gas well full-well section foam drainage wellbore simulation test method, which is used to solve the technical problem of large test result errors in the current gas well full-well section foam drainage wellbore simulation test method; in addition, the purpose of the present invention is also to provide a gas well full-well section foam drainage wellbore simulation test device applied to the above-mentioned gas well full-well section foam drainage wellbore simulation test method.

[0005] The gas well full-well section foam drainage wellbore simulation test method of the present invention adopts the following technical scheme:

[0006] By adjusting the inclination angle of the visual simulation container and the pressure environment in the visual simulation container, the visual simulation container is made to simulate each target section of the entire well section. The foam drainage process test is carried out on the visual simulation container in each state to obtain the foam drainage test data of the entire well section.

[0007] Beneficial effect: By adjusting the inclination angle of the visual simulation container and dividing the whole well section into several target sections, the visual simulation container can simulate each target section in the whole well section, accurately obtain the test data of each target section, and finally obtain the test data of the whole well section by simulating each target section. Due to the adoption of the segmented simulation method, the volume requirement of the visual simulation container is small, the simulation process and data are more intuitive and accurate, and the more realistic well conditions in the wellbore can be simulated, solving the technical problem of large error in the test results of the current gas well full-well section foam drainage wellbore simulation test method.

[0008] The full-section foam drainage wellbore simulation test device for gas wells adopts the following technical solutions:

[0009] The whole-section foam drainage wellbore simulation test device for gas wells includes:

[0010] The gas supply unit provides the high-pressure gas required during the test and can simulate the formation pressure by controlling the gas input;

[0011] A liquid supply unit, used for providing a mixed solution of a foaming agent and simulated formation water, and capable of changing the liquid supply speed according to the situation to be simulated;

[0012] The back pressure unit provides adjustable back pressure to simulate the back pressure conditions of different gathering and transportation pipelines in actual gas well production and simulate the use environment of the foaming agent;

[0013] a collecting unit for collecting the liquid remaining in the gas-liquid mixture;

[0014] Support;

[0015] A simulated container fixing part is rotatably assembled on the support, and the rotation axis of the simulated container fixing part extends horizontally;

[0016] A visual simulation container, which can be detachably fixed on the simulation container fixing member and is used to simulate the well section;

[0017] A locking member is used to lock the simulated container fixing member after the simulated container fixing member is adjusted to a set angle.

[0018] Beneficial effect: The visual simulation container is rotatably assembled on the support through the simulation container fixing part, and the angle of the visual simulation container can be adjusted. By adjusting the angle of the visual simulation container, each target section of the whole well section is simulated, so as to obtain the test result of each target section in the whole well section, and finally obtain the test result of the whole well section. The gas well full-section foam drainage wellbore simulation test device simulates multiple times, which is more consistent with the real well section and the device is small in size, which solves the technical problem of large error in the test results of the current simulation test device.

[0019] Furthermore, one of the support and the simulated container fixture is provided with an angle indicating structure, and the other is provided with an angle scale, and the angle scale cooperates with the angle indicating structure to display the tilt angle of the simulated container fixture. The tilt angle of the simulated container fixture relative to the support can be intuitively and clearly seen.

[0020] Furthermore, the support includes a dial, an angle scale is arranged on the dial, and the angle indicating structure is a pointer arranged on the simulated container fixing member. The cooperation between the pointer and the dial can make the reading of the tilt angle more accurate.

[0021] Furthermore, the simulation container fixing member is provided with a mounting groove with an opening facing away from the support, and the visual simulation container is detachably fixed in the mounting groove. The mounting groove plays a certain role in fixing and supporting the visual simulation container, and the tilt angle of the mounting groove is the tilt angle of the visual simulation container.

[0022] Furthermore, a clamp for clamping the visual simulation container is provided in the installation groove, and the clamp includes at least two clamping claws. The clamp clamps the visual simulation container and fixes the visual simulation container in the installation groove.

[0023] Furthermore, the clamp includes a clamping spring, which is used to apply elastic force to the clamping claws so that the clamp can clamp the visual simulation container. The use of the clamping spring to apply elastic force to the clamping claws makes the structure of the clamp simple.

[0024] Furthermore, the lower side wall of the installation groove is provided with a supporting base for supporting the visual simulation container. The auxiliary clamp and the installation groove provide better support and fixation for the visual simulation container.

[0025] Furthermore, the simulated container fixing member is connected to a rotating shaft, the rotating shaft includes a threaded section on the side of the support facing away from the simulated container fixing member, and the locking member is a locking nut arranged on the threaded section. The simulated container fixing member can rotate relative to the support, the simulated container fixing member can be rotated at any angle using the rotating shaft, and locked using the locking nut, and the structure is simple.

[0026] Furthermore, the liquid supply unit includes a heating device for heating the mixed solution of the foaming agent to be evaluated and the simulated formation water. The heating device of the present invention is arranged in the liquid supply unit, and there is no need to install a heating element at the visual simulation container, thereby increasing the service life of the visual simulation container. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 4 is a front view of a gas well full-well section foam drainage wellbore simulation test device in specific embodiment 1 of the gas well full-well section foam drainage wellbore simulation test device of the present invention;

[0028] Figure 2 4 is a cross-sectional view of a gas well full-well section foam drainage wellbore simulation test device in specific embodiment 1 of the gas well full-well section foam drainage wellbore simulation test device of the present invention;

[0029] In the figure: 1. support; 11. dial; 12. bearing; 2. simulated container fixing part; 21. sleeve; 211. pointer; 212. sliding ball; 213. shaft mounting hole; 214. limit slot; 215. mounting slot; 216. supporting base; 22. clamp; 221. clamping claw; 222. front clamping rod; 223. rear clamping rod; 224. clamping spring; 3. visual simulated container; 4. shaft; 41. mounting section; 42. threaded section; 43. tooth; 44. end stopper; 5. locking nut; 51. gasket. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] Specific embodiment 1 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0035] like Figure 1 As shown, the gas well full-section foam drainage wellbore simulation test device includes a support 1, a simulation container fixing part 2, a visual simulation container 3 and a locking part.

[0036] The support 1 includes a dial 11 and a supporting base (not shown in the figure). The dial 11 is a circular disk with angular scales marked on the circumferential edge of the dial 11, and a bearing 12 is arranged at the center of the dial 11. The supporting base is used to support the simulation test device. The supporting base is made of high-strength steel and is fixedly connected to the dial to provide good support for the simulation test device.

[0037] like Figure 2As shown, the simulator fixture 2 includes a long sleeve 21, which is rotatably mounted on the dial 11 so that the sleeve 21 can be rotated relative to the dial 11. A pointer 211 is provided on the top of the outer side of the sleeve 21, and the pointer 211 can point to the angular scale on the circumferential edge of the dial 11. The pointer 211 cooperates with the angular scale to display the inclination angle of the sleeve 21. The inclination angle can be read more accurately through the pointer 211, thereby realizing accurate adjustment of different angles of the sleeve 21. Through the cooperation between the dial 11 with the angular scale and the pointer 211 at the top of the sleeve 21, the inclination angle of the sleeve 21 can be adjusted intuitively, conveniently and accurately, making the angle adjustment of the sleeve 21 more intuitive and convenient. A ball 212 is arranged between the sleeve 21 and the dial 11. A guide groove cooperating with the ball 212 is arranged on the opposite side of the sleeve 21 and the dial 11, so that the ball 212 can slide along the guide groove. Due to the guiding effect of the guide groove, the ball 212 is not easy to fall off. The arrangement of the ball 212 can reduce the friction force when the sleeve 21 rotates relative to the dial 11, making it easier to adjust the angle of the sleeve 21.

[0038] The sleeve 21 and the scale plate 11 are connected via a rotating shaft 4. In this embodiment, the rotating shaft constitutes a connecting member connecting the sleeve 21 and the scale plate 11. The rotating shaft 4 includes a mounting section 41 and a threaded section 42. The mounting section 41 is mounted in cooperation with the scale plate 11 and the sleeve 21.

[0039] The mounting section 41 is rotatably matched with the scale plate 11 through the bearing 12. A shaft mounting hole 213 for the shaft to pass through is provided on the sleeve 21. A limit slot 214 is provided on the hole wall of the shaft mounting hole 213. A latch 43 and an end stop plate 44 are provided on the mounting section 41. The mounting section 41 passes through the shaft mounting hole 213. The latch 43 and the limit slot 214 are locked to prevent relative rotation between the shaft 3 and the sleeve 21. The radius of the end stop plate 44 is larger than the radius of the shaft mounting hole 213, which can prevent the shaft 4 from coming out of the sleeve 21 and the scale plate 11 along the axial direction. The shaft 4 can rotate relative to the scale plate 11. The sleeve 21 and the shaft 4 are locked to prevent relative rotation. The sleeve 21 and the shaft 4 rotate relative to the scale plate 11, and the angle of the sleeve 21 can be adjusted. The sleeve 21 is angularly adjusted by central rotation on the dial 11, which saves space.

[0040] The threaded section 42 is connected with a locking member. In this embodiment, the locking member is a locking nut 5. The locking nut 5 has an open state in which the sleeve 21 can be adjusted in angle and a tightened state in which the sleeve 21 is locked relative to the dial 11. The locking nut 5 is rotated to put the locking nut in the open state, and the sleeve 21 can be rotated relative to the dial 11. The sleeve 21 is rotated to make the pointer 211 point to the appropriate angle required to be adjusted on the dial 11. The locking nut 5 is rotated in the reverse direction to put the locking nut in the tightened state, and the sleeve 21 and the dial 11 are relatively fixed, and the sleeve 21 will not rotate relative to the dial 11. A gasket 51 is arranged between the locking nut 5 and the dial 11 to increase the friction between the locking nut 5 and the dial 11, so that after the locking nut 5 is tightened, the sleeve 21 and the rotating shaft 3 will not rotate relative to the locking nut 5 or the dial 11. The sleeve 21 and the dial 11 are fastened with a locking nut 5, which has a simple structure and is easy to operate. The sleeve 21 can be adjusted and fixed at different inclination angles by rotating the locking nut 5. The locking nut 5 is specifically a butterfly nut, which can be opened or tightened without using tools, making the operation more convenient.

[0041] The sleeve 21 is provided with a mounting groove 215 with an opening facing away from the scale plate, and the visual simulation container 3 can be detachably fixed in the mounting groove 215. A supporting base 216 is provided on the lower side wall of the mounting groove 215. The supporting base 216 is two rubber blocks that can cooperate with the bottom of the visual simulation container 3, and plays a certain supporting role for the visual simulation container 3. The simulation container fixing part 2 also includes a clamp 22, which is arranged in the mounting groove 215 and is used to clamp the visual simulation container 3. The clamp 22 includes a clamping claw 221 and a clamping rod. The clamping rod is divided into two sections, namely a front clamping rod 222 and a rear clamping rod 223. One end of the rear clamping rod 223 is rotatably mounted on the end stopper 44 of the rotating shaft 4, and the other end is fixedly connected to the front clamping rod 222. The other end of the front clamping rod 222 is fixedly connected to the clamping claw 221. The clamping surface of the clamping jaw 221 matches the wall of the visual simulation container 3 , which can ensure that the clamping surface of the clamping jaw 221 and the wall of the visual simulation container 3 are better fitted.

[0042] The two rear clamping rods 223 are connected with clamping springs 224, which exert force on the two rear clamping rods 223 so that the clamping claws 221 can clamp the visual simulation container 3. The clamping clip 221 has two states: open and clamped. When the visual simulation container 3 is placed in or taken out of the clamping clip 221, the clamping claws 221 need to be manually opened to make the clamping clip 22 in the open state, and the visual simulation container 3 can be taken out or placed in. When the clamping clip 22 is in the clamped state, the visual simulation container 3 is fixed in the mounting groove 215.

[0043] In this embodiment, the visual simulation container 3 is a transparent glass tube made of transparent high-temperature and high-pressure glass, which is used to simulate the conditions of the well section. During the test, the operator can directly observe the conditions in the glass tube through the transparent glass. A scale is set on the side wall of the glass tube to facilitate reading the height of the liquid or foam in the glass tube.

[0044] When in use, force is applied to the clamping jaws 221 to open the two clamping jaws 221, the bottom of the glass tube is placed on the supporting base 216, and the glass tube is placed between the two clamping jaws 221, so that the two clamping jaws 221 clamp the glass tube under the elastic force of the clamping spring 224, thereby fixing the glass tube. The sleeve 21 can be rotated to adjust the inclination angle of the glass tube, thereby simulating well sections with different inclination angles.

[0045] The gas well full-section foam drainage wellbore simulation test device also includes an air supply unit, a liquid supply unit, a back pressure unit and a collection unit, all of which are connected to the visual simulation container 3 through a detachable high-pressure hose. The air supply unit and the liquid supply unit are connected to the lower end of the visual simulation container 3 through the high-pressure hose passing through the lower end of the sleeve 21, and the back pressure unit and the collection unit are connected to the upper end of the visual simulation container 3 through the upper end of the sleeve 21 passing through the high-pressure hose.

[0046] The gas supply unit provides the high-pressure gas required during the test, simulates the formation pressure by controlling the gas input into the visual simulation container 3, and records the provided pressure. The gas supply unit includes a high-pressure gas cylinder, a throttle valve, a gas flow meter, a pressure gauge, and a check valve. The high-pressure gas cylinder provides the high-pressure gas (nitrogen or air) required during the test, the pressure reducing valve controls the outlet pressure of the gas cylinder to simulate the formation pressure, the pressure gauge measures the gas outlet pressure, the gas flow meter measures the gas flow, and the check valve controls the gas switch.

[0047] The liquid supply unit is used to provide a mixed solution of a foaming agent and simulated formation water. The liquid supply speed can be changed according to the situation to be simulated, and the pressure at the outlet of the mixed solution and the flow rate of the mixed solution are recorded. The liquid supply unit includes a temperature-adjustable liquid storage tank, a water pump, a pressure gauge, and a flow meter. The temperature-adjustable liquid storage tank is used to store a mixed solution of a certain concentration of a foaming agent to be evaluated and simulated formation water. The temperature-adjustable liquid storage tank includes a heating device that can heat the solution to adjust the temperature of the mixed solution, and the heating device uses an electric heating wire. In other embodiments, the heating device can also be heated by steam. The water pump is used to pump the mixed solution into the visual simulation container 3, and the pumping speed can be adjusted within 1~500ml / min; the pressure gauge measures the outlet pressure of the mixed solution; the flow meter measures the flow rate of the mixed solution.

[0048] The back pressure unit independently provides adjustable back pressure to the top of the visual simulation container 3, which is used to simulate the back pressure conditions of different gathering and transportation pipelines in the actual production of gas wells, and to simulate the use environment of the foaming agent more accurately. The back pressure unit includes a back pressure pump and a needle valve.

[0049] The collection unit collects the liquid left in the gas-liquid mixture due to gravity. The collection unit includes a pressure reducing valve and a collector. The gas-liquid mixture enters the collector after being decompressed by the pressure reducing valve. The gas evaporates directly, and the liquid remains in the collector due to gravity. A defoaming agent can also be used in combination. The collector also has a scale to accurately measure the amount of liquid taken out.

[0050] For angle adjustment, the visual simulation device 3 can be adjusted between 0° and 90°. The visual simulation container 3 is used to simulate the wellbore structure of the entire well section, and the angle adjustment between 0° and 90° can meet the simulation of any well section with an inclination angle from a vertical well to a horizontal well.

[0051] Next, the working principle of the full-section foam drainage wellbore simulation test device for gas wells is briefly introduced:

[0052] Fix the visual simulation container 3 in the mounting groove 215, connect the visual simulation container 3 with the air supply unit, liquid supply unit, back pressure unit and collection unit using a detachable high-pressure hose, adjust the inclination angle of the sleeve 21, point the pointer 211 to the simulation angle required for the test, and turn the locking nut 5 to fix the sleeve 21 relative to the dial 11.

[0053] The gas well production fluid or the configured simulated formation water and the foaming agent to be evaluated are heated and kept warm to the test temperature by using the liquid supply unit, and then injected into the visual simulation container 3; the gas injection volume is adjusted by using the gas supply unit, and the visual simulation container 3 is inflated and pressurized to the same as the bottom hole flow pressure; the gas wellhead pressure simulated by the back pressure unit is pressurized to the simulated pressure at the upper end of the visual simulation container 3; the state of the gas-liquid mixture in the visual simulation container 3 is observed, and the pressure gauge, flow meter, foam height value and scale value of the production fluid in each unit are recorded; finally, the collection unit is used to process and collect the test fluid.

[0054] By rotating the sleeve 21 to make the visual simulation container 3 at different angles, the conditions of the required test well section are simulated through the gas supply unit, the liquid supply unit and the back pressure unit, and the foam morphology changes of the foam drainage agent in different well sections with different wellbore structures such as vertical wells, directional wells and horizontal wells can be intuitively seen, so as to accurately determine the use of the foam drainage agent in different well sections. By dividing the entire well section into several target sections, the foam drainage wellbore simulation test device for the entire well section of the gas well can be made to correspond to the actual conditions of the target section in the entire well section by changing the inclination angle, the data of the gas supply unit, the liquid supply unit and the back pressure unit, and the test data of each target section can be accurately obtained. By simulating each target section, the test data corresponding to the entire well section can be finally obtained.

[0055] The gas well full-well section foam drainage wellbore simulation test device of the present invention can carry out foam drainage process tests, not only can measure the liquid carrying rate of the foam drainage agent, but also has the functions of a conventional Roche foam tester, such as the measurement of foaming height and foam stabilization ability.

[0056] The specific process of measuring the liquid carrying rate of the foam drainage agent using the foam drainage wellbore simulation test device of the present invention is as follows:

[0057] Prepare 5000ml of water sample simulating the mineralization of the original formation water for standby use, take 600ml of the prepared water sample, add 1.8ml of the foaming agent according to the foaming agent injection concentration (such as 0.3% by volume) and stir evenly. Rinse the foam drainage wellbore simulation test device for the entire section of the gas well with clean water, measure 100ml of the mixed liquid to be tested, rinse the device and then discharge it. Measure 250ml of the mixed liquid to be tested and add it to the simulation test device, then turn the visual simulation container to the simulation angle required for the test and fix it. Open the liquid supply unit to heat the foaming agent to be evaluated to the test temperature, and open the back pressure unit in turn to pressurize the upper end of the visual simulation container to simulate the back pressure. Open the gas supply unit to inflate the bottom of the visual simulation container, and control the pressure to be the same as the bottom hole flow pressure. Finally, collect the foam brought out with the help of the collection unit. After the foam is completely broken into water, record the volume of water, calculate the liquid carrying rate, adjust the simulation angle, repeat the test three times, record the data, and obtain the foaming agent carrying rate under different inclined sections.

[0058] By changing the test temperature, the temperature resistance stability of the foam drainage agent can be obtained. The specific measurement process of the foam height and foam stabilization ability using the full-well section foam drainage wellbore simulation test device of the present invention is as follows:

[0059] Prepare 5000ml of water sample simulating the mineralization of the original formation water for use. Take 600ml of the prepared water sample, add 1.8ml of the foaming agent according to the concentration of the foaming agent (such as 0.3% by volume) and stir evenly. Rinse the foam drainage wellbore simulation test device for the entire section of the gas well with clean water, measure 100ml of the foaming agent with a concentration of 0.3%, rinse the device and then discharge it. Measure 50mL of the mixed liquid to be tested and place it along the inner wall of the visual simulation container to form a liquid surface at the bottom. Open the liquid supply unit to heat the foaming agent to be evaluated to the test temperature. Measure 200mL of the mixed liquid to be tested and place it in the center of the upper end of the visual simulation container, align it with the liquid surface and place it vertically. After the sample liquid is released, immediately open the back pressure unit to pressurize the upper end of the visual simulation container to simulate the back pressure, and record the height of the foam rise, which is the foaming performance; record the foam height again after 5 minutes, which is the foam stability performance. Repeat the above test 3 times. By changing the test temperature and testing again, the temperature stability of the foaming height and foam stabilizing ability of the foaming agent can be obtained.

[0060] Specific embodiment 2 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0061] The only difference from the gas well full-section foam drainage wellbore simulation test device in the above-mentioned Example 1 is that only an ordinary disc with a pointer on it is arranged on the support, and the bottom surface of the sleeve is located on another disc with an angular scale on it. The angle of the simulated container fixing can be displayed through the angular scale and the pointer on the disc.

[0062] Specific embodiment 3 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0063] The only difference from the gas well full-section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that two claws are arranged in the installation groove, arranged at the upper and lower ends of the installation groove, to clamp the upper and lower ends of the visual simulation container.

[0064] Specific embodiment 4 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0065] The only difference from the gas well full-well section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that the clamp has three clamping claws to clamp the visual simulation container, one end of the visual simulation container in the clamping direction is clamped by one clamping claw, and the other end in the clamping direction is clamped by two clamping claws. In other embodiments, a clamp may also have four, five, or more than two clamping claws, and in the clamping direction, one end of the visual simulation container has at least one clamping claw to clamp the visual simulation container.

[0066] Specific embodiment 5 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0067] The only difference from the gas well full-well section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that the size of the installation groove is the same as the size of the visual simulation container, and there is no need for a clamp to clamp the visual simulation container, and there is a matching relationship between the installation groove and the visual simulation container. In other embodiments, the clamp is directly set on the bottom of the sleeve to clamp the visual simulation container.

[0068] Specific embodiment 6 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0069] The only difference from the gas well full-well section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that the supporting base on the lower side wall of the installation groove for supporting the visual simulation container is an integrated rubber sheet, which fits the bottom of the visual simulation container. In other embodiments, other flexible materials can also be used to support the visual simulation container. In other examples, no supporting base is provided on the lower side wall of the installation groove, and the bottom of the visual simulation container directly contacts the lower side wall of the installation groove.

[0070] Specific embodiment 7 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0071] The only difference from the gas well full-well section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that the clamping spring is arranged at the other end where the clamping claw is connected to the front clamping rod, and is detachably connected to one of the clamping claws. When it is necessary to clamp the visual simulation container, the detachable end of the clamping spring and the clamping claw is removed, the visual simulation container is placed between the two clamping claws, and the clamping spring is installed to clamp the visual simulation container. In other embodiments, a torsion spring can be arranged at the place where the rear clamping rod is rotatably connected to the end baffle to provide clamping force for the two clamps.

[0072] Specific embodiment 8 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0073] The only difference from the gas well full-well section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that in this embodiment, a fixing hole is provided on the simulated container fixing part, the extension direction of the fixing hole is consistent with the extension direction of the rotation axis of the simulated container fixing part, and a plurality of angle adjustment holes corresponding to the fixing holes are provided on the support, and the fixing bolts pass through the fixing holes and are fixed to the angle adjustment holes to achieve the fixation of the simulated container fixing part. In this case, the locking part is a fixing bolt, and the fixing effect is better.

[0074] Specific embodiment 9 of the gas well full-well section foam drainage wellbore simulation test device of the present invention:

[0075] The only difference from the gas well full-section foam drainage wellbore simulation test device in the above-mentioned embodiment 1 is that in this embodiment, the simulation container fixing member is a fixing plate, and the simulation container is fixed on the fixing plate by a clamp.

[0076] Specific embodiments of the gas well full-well section foam drainage wellbore simulation test method of the present invention:

[0077] A foam drainage wellbore simulation test device for the entire gas well section is used. By adjusting the inclination angle of the visual simulation container and the pressure environment in the visual simulation container, the visual simulation container can simulate each target section of the entire well section. The foam drainage process test is carried out on the visual simulation container in each state, thereby obtaining the foam drainage test data of the entire well section.

[0078] The above-mentioned gas well full-well section foam drainage wellbore simulation test device used in the gas well full-well section foam drainage wellbore simulation test method in this embodiment is consistent with the gas well full-well section foam drainage wellbore simulation test device involved in any embodiment of the above-mentioned gas well full-well section foam drainage wellbore simulation test device, and will not be described in detail. In other embodiments, other methods can also be used to adjust the angle of the visual simulation container, such as fixing the visual simulation container on a work platform with different angles.

[0079] In other embodiments, a plurality of simulation containers with different inclination angles may be used to implement the above simulation test method.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. Gas well full-well section foam drainage wellbore simulation test device, including: The gas supply unit provides the high-pressure gas required during the test and can simulate the formation pressure by controlling the gas input; A liquid supply unit, used to provide a mixed solution of a foaming agent and simulated formation water, and the liquid supply speed can be changed according to the situation to be simulated; The back pressure unit provides adjustable back pressure to simulate the back pressure conditions of different gathering and transportation pipelines in actual gas well production and simulate the use environment of the foaming agent; A collecting unit for collecting the liquid left in the gas-liquid mixture; It is characterized by further comprising: A support (1), the support (1) comprising a dial (11); The simulated container fixing member (2) is rotatably mounted on the support (1), and the rotation axis of the simulated container fixing member (2) extends horizontally; the simulated container fixing member (2) comprises a sleeve (21), and the sleeve (21) is rotatably mounted on the dial (11), so that the sleeve (21) can be rotated relative to the dial (11); the sleeve (21) and the dial (11) are connected via a rotating shaft (4), and the rotating shaft (4) comprises a mounting section (41), and the mounting section (41) is rotatably matched with the dial (11) via a bearing, and the sleeve (2 1) is provided with a rotating shaft mounting hole (213) for the rotating shaft (4) to pass through, a limiting clamping groove (214) is provided on the hole wall of the rotating shaft mounting hole (213), a clamping tooth (43) and an end stop plate (44) are provided on the mounting section (41), the mounting section (41) passes through the rotating shaft mounting hole (213), the clamping tooth (43) and the end stop plate (44) are engaged in a rotation-stopping groove, so that the rotating shaft (4) and the sleeve (21) cannot rotate relative to each other; the sleeve (21) is provided with a mounting groove (215) whose opening faces away from the scale plate (11); A visual simulation container (3) is used to simulate a well section; the visual simulation container (3) can be detachably fixed in the mounting groove (215); the rotating sleeve (21) can adjust the inclination angle of the visual simulation container (3), thereby simulating well sections with different inclination angles; A locking member is used to lock the simulated container fixing member (2) after the simulated container fixing member (2) is adjusted to a set angle.

2. The gas well full-well section foam drainage wellbore simulation test device according to claim 1 is characterized in that: One of the support (1) and the simulated container fixing member (2) is provided with an angle indicating structure, and the other is provided with an angle scale, and the angle scale cooperates with the angle indicating structure to display the tilt angle of the simulated container fixing member (2).

3. The gas well full-well section foam drainage wellbore simulation test device according to claim 2 is characterized in that: The angle scale is arranged on the dial (11), and the angle indicating structure is a pointer (211) arranged on the simulated container fixing part (2).

4. The gas well full-well section foam drainage wellbore simulation test device according to claim 3 is characterized in that: A clamp (22) for clamping the visual simulation container (3) is provided in the installation groove (215), and the clamp (22) comprises at least two clamping claws (221).

5. The gas well full-well section foam drainage wellbore simulation test device according to claim 4 is characterized in that: The clamp (22) comprises a clamping spring (224), and the clamping spring (224) is used to apply elastic force to the clamping claw (221) so that the clamp (22) clamps the visual simulation container (3).

6. The gas well full-well section foam drainage wellbore simulation test device according to claim 5 is characterized in that: The lower side wall of the installation groove (215) is provided with a supporting base (216) for supporting the visual simulation container (3).

7. The gas well full-well section foam drainage wellbore simulation test device according to claim 1, 2 or 3, characterized in that: The rotating shaft (4) comprises a threaded section (42) located on a side of the support (1) facing away from the simulation container fixing member (2), and the locking member is a locking nut (5) arranged on the threaded section (42).

8. The gas well full-well section foam drainage wellbore simulation test device according to claim 1, 2 or 3, characterized in that: The liquid supply unit comprises a heating device for heating a mixed solution of the foaming agent to be evaluated and simulated formation water.

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