A system and method for cleanup agent performance testing

Abstract

The application discloses a kind of for cleanup agent performance test system and method, including gas-liquid injection system, stratum adsorption simulation system, core reaction simulation system, gas-liquid discharge detection system;Core reaction simulation system is used to load the core of known permeability, and make after stratum adsorption simulation system cleanup agent solution injection core;Gas-liquid discharge detection system is used by adjusting pipeline valve, using high-pressure gas or oil reverse injection core, after stabilizing, flow pressure data are collected and calculated;The cleanup agent solution of the application first flows through stratum adsorption simulation system, then injects the core in the core reaction simulation system of core;Then adjust pipeline valve, using high-pressure gas or oil reverse injection core, after stabilizing, flow pressure data are collected, and the cleanup rate of cleanup agent is calculated.The application can accurately evaluate the performance of cleanup agent to reduce water lock damage, provide reliable data and strong experimental support for product research and development and performance evaluation of cleanup agent.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field development evaluation technology, specifically to a system and method for testing the performance of drainage aids. Background Technology

[0002] As exploration and development continue, the scale of single-well use of reservoir stimulation fluids is gradually increasing. While improving reservoir flow channels, reservoir stimulation fluids can also cause water-locking damage, reducing the effectiveness of the stimulation. To address this, reservoir stimulation fluids currently commonly employ the addition of drainage aids to mitigate water-locking damage.

[0003] Currently, the evaluation methods for drainage aids mainly include the drainage performance test method (7.9) in NB / T14003.1-2015, the drainage rate test method (6.8) in SY / T5755-2016, and the core damage and relief method mentioned by Xu Hualei et al. in their paper "Research on Influencing Factors and Prevention Measures of Water Locking Damage in Coalbed Methane Reservoirs". However, existing drainage aid evaluation devices and methods do not consider the influence of reservoir adsorption on drainage aid performance, and the evaluation methods do not match the actual field conditions, failing to truly reflect the actual drainage and water locking effects of drainage aids in the fracturing formation. Summary of the Invention

[0004] To address at least one of the problems and shortcomings of the aforementioned devices and methods for evaluating drainage aids, this invention provides a system and method for testing the performance of drainage aids. This invention utilizes a device to test the drainage-aiding performance of drainage aids, and the device features simulated on-site conditions and intuitive operation.

[0005] This invention is achieved through the following technical solution:

[0006] One object of the present invention is to provide a system for testing the performance of drainage aids.

[0007] Another object of the present invention is to provide a method for evaluating the performance of drainage aids.

[0008] In a first aspect, the present invention provides a performance testing system for a drainage aid, the performance testing system comprising a gas-liquid injection system, a formation adsorption simulation system, a core reaction simulation system, and a gas-liquid discharge detection system; wherein the gas-liquid injection system is connected to the formation adsorption simulation system, the gas-liquid injection system is connected to the core reaction simulation system, the formation adsorption simulation system is connected to the core reaction simulation system, and the core reaction simulation system is connected to the gas-liquid discharge detection system.

[0009] The gas-liquid injection system is used to inject experimental liquids into the formation adsorption simulation system and core reaction simulation system of the next-level device, and to inject gas; wherein, the experimental liquids can be drainage aid solutions or other experimental liquids;

[0010] The formation adsorption simulation system is used to fill the adsorbent and partially adsorb the drainage aid solution.

[0011] The core reaction simulation system is used to load a core with known permeability and inject the drainage aid solution after passing through the formation adsorption simulation system into the core.

[0012] The gas-liquid discharge detection system is used to inject high-pressure gas or oil into the core in reverse by adjusting the pipeline valves, and then collect flow and pressure data for calculation after stabilization. Specifically, the liquid discharge is measured by the increase in mass on an electronic balance per unit time, and the gas discharge is measured by a gas flow meter.

[0013] During the experiment, the drainage aid solution was loaded into a gas-liquid injection system, the adsorbent into a formation adsorption simulation system, and a core sample with known permeability into a core reaction simulation system. Pipeline valves were adjusted, and the injection pump was turned on, allowing the drainage aid solution to first flow through the formation adsorption simulation system before being injected into the core sample of the core reaction simulation system. Then, pipeline valves were adjusted, and high-pressure gas or oil was injected back into the core. After stabilization, flow rate and pressure data were collected, and the post-test permeability of the core was calculated, thereby determining the drainage aid's drainage rate. Alternatively, flow rate and pressure data before and after injection of the drainage aid solution could be collected to calculate the drainage rate. This invention can accurately evaluate the performance of drainage aids in reducing waterlock damage, providing reliable data and strong experimental support for the product development and performance evaluation of drainage aids.

[0014] This invention incorporates a formation adsorption simulation system before the experimental fluid enters the core sample, resulting in experimental results that more accurately simulate actual field conditions. The formation adsorption simulation system in this invention can modify its internal volume and length, and can compact the internal filling material, simulating the drainage performance under different reservoir stimulation conditions. In summary, this invention can simulate well and operational conditions as needed, enabling precise evaluation of the drainage performance of drainage aids. This facilitates performance evaluation, screening, and development of drainage aids, providing reliable data and strong experimental support for reservoir stimulation operations.

[0015] Furthermore, the gas-liquid injection system, formation adsorption simulation system, core reaction simulation system, and gas-liquid discharge detection system are all made of rigid materials and can withstand pressures of not less than 20 MPa.

[0016] Furthermore, the gas-liquid injection system includes a first water injection pump, a piston-type liquid tank, and a gas cylinder. The first water injection pump is connected to the piston-type liquid tank via a pipeline, and the piston-type liquid tank is driven by the first water injection pump. The piston-type liquid tank is connected to the formation adsorption simulation system and the core reaction simulation system via pipeline valves.

[0017] The first water injection pump is used to precisely control the flow rate and pressure, including two injection modes: constant flow and constant pressure.

[0018] The piston-type liquid tank is used in conjunction with the first water pump to inject experimental liquid; at both ends of the piston are a drainage aid solution and water, respectively. The first water pump injects water, pushes the piston, and discharges the drainage aid solution from the liquid tank.

[0019] The pipelines and valves are connected as required to control the experimental process;

[0020] The gas cylinder is used for injecting gas; the gas cylinder is equipped with a pressure reducing valve for controlling the gas pressure.

[0021] Furthermore, the number of piston-type liquid tanks includes at least one (multiple tanks may be used), and the liquid from any one piston-type liquid tank is injected into the next stage system through pipeline valve control.

[0022] Furthermore, the gas-liquid injection system selects to inject gas or liquid into the formation adsorption simulation system or the core reaction simulation system through pipeline valves; injects the gas or liquid flowing through the formation adsorption simulation system into the core reaction simulation system through pipeline valves; and finally guides the liquid or gas into the gas-liquid discharge detection system through pipeline valves.

[0023] Furthermore, the formation adsorption simulation system consists of inner and outer tubes nested together in reverse, connected by threads, and the internal volume of the combined inner and outer tubes can be adjusted by rotation; the outer thread of the outer tube is made of sealing rubber, and the inner and outer tubes can be sealed at any position, which is used to adjust the size of the internal space.

[0024] Furthermore, filters are provided at both the inlet and outlet ends of the inner and outer tubes to prevent the solid particles of the adsorbent packed inside the formation adsorption simulation system from flowing out.

[0025] The filter screen is installed inside a short connecting pipe. One end of the connecting pipe is connected to the inlet and outlet ends of the inner and outer pipes, and the other end is connected to the pipeline system.

[0026] Furthermore, the core reaction simulation system includes a metal outer cylinder and a rubber cylinder, the rubber cylinder penetrating the metal outer cylinder and being joined to the metal outer cylinder at both ends; the annulus between the metal outer cylinder and the rubber cylinder is closed, and the annulus is connected to a second water injection pump through a pipeline for fixing the core;

[0027] The annulus is filled with clean water, and pressure is provided by a connected second water pump. The rubber cylinder is used to hold the experimental rock core and a metal tube of the same diameter. The two ends of the metal tube are connected, one end to the rock core and the other end to the pipeline.

[0028] Furthermore, one end of the outer side of the metal tube is threaded and is fixed to the outer cylinder of the core reaction simulation system by the thread.

[0029] Furthermore, the gas-liquid discharge detection system includes an electronic balance, a beaker, and a gas flow meter. The electronic balance is equipped with a beaker, which is connected to the outlet of the core reaction simulation system via a first pipeline and a pipeline valve. The beaker is also connected to the inlet of the formation adsorption simulation system and the core reaction simulation system via a second pipeline and a pipeline valve.

[0030] Furthermore, the adsorbent includes ceramsite, quartz sand, or rock chips.

[0031] Furthermore, the discharge assistance rate (which measures the discharge assistance performance of the discharge assistance agent) is calculated using the following formula:

[0032] η = (q2 / q1) × 100%

[0033] In the formula:

[0034] η is the drainage rate of the drainage aid, in %; q1 is the gas flow rate of the core under dry conditions, in L / min; q2 is the gas flow rate of the core after it is saturated with the experimental liquid, in L / min.

[0035] Secondly, the present invention also provides a method for using the aforementioned performance testing system for drainage aids, the method comprising the following steps:

[0036] Step 1: Connect the power supply, fill the piston-type liquid tank of the drainage aid performance testing system with the experimental liquid (i.e., drainage aid solution), fill the formation adsorption simulation system with ceramsite, quartz sand or rock cuttings, and load the core with known permeability into the core reaction simulation system.

[0037] Step 2: Turn on the second water injection pump connected to the core reaction simulation system and adjust it to the predetermined pressure;

[0038] Step 3: Adjust the pipeline valves to allow the gas in the gas cylinder to pass through the core holder and flow to the gas flow meter;

[0039] Step 4: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, and record the stable gas flow rate q1;

[0040] Step 5: Adjust the pipeline valves, open the first water injection pump connected to the piston-type liquid tank, set the injection mode and parameters, and drive the experimental liquid in the piston-type liquid tank to the formation adsorption simulation system. At this time, some of the drainage aid in the experimental liquid will be adsorbed onto the ceramsite, quartz sand or rock fragments.

[0041] Step 6: Continue injecting experimental liquid until the experimental liquid flows through the core reaction simulation system and onto the beaker of the electronic balance in the gas-liquid discharge detection system. At this point, the core is saturated with experimental liquid containing less discharge aid.

[0042] Step 7: Adjust the pipeline valves so that the gas in the gas cylinder can pass through the core holder and flow to the beaker on the electronic balance;

[0043] Step 8: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, and adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, which is the same as in step 4. At this time, the experimental liquid in the core will be discharged into the beaker on the electronic balance.

[0044] Step 9: After the mass displayed on the electronic balance stops increasing, adjust the pipeline valve to allow the gas flowing out of the core holder to flow to the gas flow meter and record the stable gas flow rate q2.

[0045] The drainage-aiding performance of the drainage aid is calculated using the following formula:

[0046] η = (q2 / q1) × 100%

[0047] In the formula: η is the drainage rate of the drainage aid, in %; q1 is the gas flow rate of the core under dry conditions, in L / min; q2 is the gas flow rate of the core after the experimental liquid is saturated, in L / min.

[0048] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0049] This invention incorporates a formation adsorption simulation system before the experimental fluid enters the core sample, resulting in experimental results that more accurately simulate actual field conditions. The formation adsorption simulation system can vary its internal volume and length and can compact the internal filling material, simulating the drainage performance under different reservoir stimulation conditions. In summary, this invention provides a system and method for testing drainage aid performance. It can simulate well conditions and operating conditions as needed, enabling precise simulation and evaluation of the drainage aid performance. This facilitates the performance evaluation, screening, and development of drainage aids, providing reliable data and strong experimental support for reservoir stimulation operations. Attached Figure Description

[0050] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0051] Figure 1 This is a schematic diagram of a performance testing system for drainage aids according to the present invention.

[0052] Figure reference numerals and corresponding component names:

[0053] 1-First water injection pump; 2-Pipeline; 3-Piston-type liquid tank; 4-Pipeline valve; 5-Formation adsorption simulation system; 6-Filter screen; 7-Second water injection pump; 8-Core reaction simulation system; 9-Beaker; 10-Gas flow meter; 11-Gas cylinder; 12-Electronic balance. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0055] Example 1

[0056] like Figure 1 As shown, the present invention provides a performance testing system for drainage aids, the performance testing system comprising a gas-liquid injection system, a formation adsorption simulation system 5, a core reaction simulation system 8, and a gas-liquid discharge detection system; the gas-liquid injection system is connected to the formation adsorption simulation system 5, the gas-liquid injection system is connected to the core reaction simulation system 8, the formation adsorption simulation system 5 is connected to the core reaction simulation system 8, and the core reaction simulation system 8 is connected to the gas-liquid discharge detection system;

[0057] The gas-liquid injection system is used to inject experimental liquid into the formation adsorption simulation system 5 and the core reaction simulation system 8 of the next-level device, and to inject gas; wherein, the experimental liquid can be a drainage aid solution or other experimental liquid;

[0058] Specifically, the gas-liquid injection system includes a first water injection pump 1, a piston-type liquid tank 3, and a gas cylinder 11. The first water injection pump 1 is connected to the piston-type liquid tank 3 through a pipeline 2, and the first water injection pump 1 pushes the piston-type liquid tank 3. The piston-type liquid tank 3 is connected to the formation adsorption simulation system 5 and the core reaction simulation system 8 through a pipeline valve 4.

[0059] The first water pump 1 is used to precisely control the flow rate and pressure, including two injection modes: constant flow and constant pressure. The piston-type liquid tank 3 is used in conjunction with the first water pump 1 to inject experimental liquid. At both ends of the piston are a drainage aid solution and clean water, respectively. The first water pump 1 injects clean water, pushes the piston, and discharges the drainage aid solution from the liquid tank. The pipelines and pipeline valves are connected as needed to control the experimental process. The gas cylinder 11 is used to inject gas. The gas cylinder 11 is equipped with a pressure reducing valve to control the gas pressure.

[0060] The piston-type liquid tank 3 includes at least one (or multiple), and the liquid from any one of the piston-type liquid tanks is injected into the next stage system through the pipeline valve 4.

[0061] The gas-liquid injection system is controlled by pipeline valve 4 to select whether to inject gas or liquid into the formation adsorption simulation system 5 or the core reaction simulation system 8; the gas or liquid flowing through the formation adsorption simulation system 5 is injected into the core reaction simulation system 8 through pipeline valve 4; and the liquid or gas is finally introduced into the gas-liquid discharge detection system through pipeline valve 4.

[0062] The formation adsorption simulation system 5 is used to fill with adsorbent to partially adsorb the drainage aid solution; in practice, the adsorbent includes ceramsite, quartz sand, or rock fragments. Specifically, the formation adsorption simulation system 5 consists of inner and outer tubes nested together in reverse, connected by threads, and the internal volume of the combined inner and outer tubes can be adjusted by rotation; the outer thread of the outer tube is sealed with rubber, and the inner and outer tubes can be sealed at any position, which is used to adjust the size of the internal space.

[0063] The inner and outer pipes are equipped with filters 6 at both their inlet and outlet ends to prevent the solid particles of the adsorbent packed inside the formation adsorption simulation system 5 from flowing out. The filters 6 are located inside a short connecting pipe, one end of which connects to the inlet and outlet ends of the inner and outer pipes, and the other end connects to the pipeline system.

[0064] The core reaction simulation system 8 is used to load a core with known permeability and inject the drainage aid solution after passing through the formation adsorption simulation system 5 into the core. Specifically, the core reaction simulation system 8 includes a metal outer cylinder and a rubber cylinder. The rubber cylinder passes through the metal outer cylinder and is connected to the metal outer cylinder at both ends. The annulus between the metal outer cylinder and the rubber cylinder is closed and connected to the second water injection pump 7 through a pipeline for fixing the core. The annulus is filled with clean water and pressure is provided by the connected second water injection pump 7. The rubber cylinder is used to load the experimental core and a metal pipe of the same diameter. The two ends of the metal pipe are connected, one end connected to the core and the other end connected to the pipeline.

[0065] The outer end of the metal tube is threaded and is fixed to the outer cylinder of the core reaction simulation system 8 by the thread.

[0066] The gas-liquid discharge detection system is used to inject high-pressure gas or oil back into the core by adjusting pipeline valves, and then collect flow and pressure data for calculation after stabilization. Specifically, the liquid discharge is measured by the increase in mass on an electronic balance per unit time, and the gas discharge is measured by a gas flow meter. Specifically, the gas-liquid discharge detection system includes an electronic balance 12, a beaker 9, and a gas flow meter 10. The electronic balance 12 is equipped with the beaker 9, which is connected to the outlet of the core reaction simulation system 8 via a first pipeline and pipeline valve. The beaker 9 is also connected to the formation adsorption simulation system 5 and the inlet of the core reaction simulation system 8 via a second pipeline and pipeline valve.

[0067] The drainage aid rate (which measures the drainage aid performance) is calculated using the following formula:

[0068] η = (q2 / q1) × 100%

[0069] In the formula:

[0070] η is the drainage rate of the drainage aid, in %; q1 is the gas flow rate of the core under dry conditions, in L / min; q2 is the gas flow rate of the core after it is saturated with the experimental liquid, in L / min.

[0071] Specifically, the gas-liquid injection system, formation adsorption simulation system 5, core reaction simulation system 8, and gas-liquid discharge detection system are all made of rigid materials and can withstand pressures of not less than 20 MPa.

[0072] During the experiment, the drainage aid solution was loaded into the gas-liquid injection system, the adsorbent into the formation adsorption simulation system 5, and a core sample with known permeability into the core reaction simulation system 8. The pipeline valves were adjusted, and the injection pump was turned on, allowing the drainage aid solution to first flow through the formation adsorption simulation system 5 before being injected into the core sample in the core reaction simulation system 8. Then, the pipeline valves were adjusted, and high-pressure gas or oil was injected back into the core sample. After stabilization, flow rate and pressure data were collected, and the post-test permeability of the core sample was calculated, thereby determining the drainage aid rate. Alternatively, flow rate and pressure data before and after injection of the drainage aid solution could be collected to calculate the drainage aid rate. This invention can accurately evaluate the performance of drainage aids in reducing waterlock damage, providing reliable data and strong experimental support for the product development and performance evaluation of drainage aids.

[0073] During implementation, the first water injection pump 1, piston-type liquid tank 3, gas cylinder 11 with pressure reducing valve, formation adsorption simulation system 5, and core reaction simulation system 8 are connected together through pipeline 2 and pipeline valve 4, and the gas and liquid can be controlled to flow into beaker 9 or gas flow meter 10 through pipeline valve 4.

[0074] Based on the above structure, the present invention provides an example of how experimental materials can be set up:

[0075] like Figure 1 As shown, the experimental liquid is loaded into the piston-type liquid tank 3. It can be poured in directly by opening the lid, or the first water pump 1 can be used to reverse the water flow and drive the piston to draw in the experimental liquid. The inner and outer tubes of the formation adsorption simulation system 5 are screwed to the required positions. A filter screen 6 is installed at one end, and the formation adsorption simulation system 5 is filled with ceramsite, quartz sand or rock chips from the other end. Then, the filter screen 6 at the sample loading end is installed, and the inner and outer tubes are tightened to compress the filling material. A rock core with known permeability is loaded into the rock core reaction simulation system 8. Then, two metal tubes of the same diameter are used to press the rock core from both ends and fix it with threads.

[0076] This invention incorporates a formation adsorption simulation system before the experimental fluid enters the core sample, resulting in experimental results that more accurately simulate actual field conditions. The formation adsorption simulation system in this invention can modify its internal volume and length, and can compact the internal filling material, simulating the drainage performance under different reservoir stimulation conditions. In summary, this invention can simulate well and operational conditions as needed, enabling precise evaluation of the drainage performance of drainage aids. This facilitates performance evaluation, screening, and development of drainage aids, providing reliable data and strong experimental support for reservoir stimulation operations.

[0077] Example 2

[0078] like Figure 1 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a method for using the performance testing system for drainage aids described in Embodiment 1, the method comprising the following steps:

[0079] Step 1: Connect the power supply, fill the piston-type liquid tank of the drainage aid performance testing system with the experimental liquid (i.e., drainage aid solution), fill the formation adsorption simulation system with ceramsite, quartz sand or rock cuttings, and load the core with known permeability into the core reaction simulation system.

[0080] Step 2: Turn on the second water injection pump connected to the core reaction simulation system and adjust it to the predetermined pressure;

[0081] Step 3: Adjust the pipeline valves so that the gas in the gas cylinder can pass through the core holder and flow to the gas flow meter;

[0082] Step 4: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, and record the stable gas flow rate q1;

[0083] Step 5: Adjust the pipeline valves, open the first water injection pump connected to the piston-type liquid tank, set the injection mode and parameters, and drive the experimental liquid in the piston-type liquid tank to the formation adsorption simulation system. At this time, some of the drainage aid in the experimental liquid will be adsorbed onto the ceramsite, quartz sand or rock fragments.

[0084] Step 6: Continue injecting experimental liquid until the experimental liquid flows through the core reaction simulation system and onto the beaker of the electronic balance in the gas-liquid discharge detection system. At this point, the core is saturated with experimental liquid containing less discharge aid.

[0085] Step 7: Adjust the pipeline valves so that the gas in the gas cylinder can pass through the core holder and flow to the beaker on the electronic balance;

[0086] Step 8: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, and adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, which is the same as in step 4. At this time, the experimental liquid in the core will be discharged into the beaker on the electronic balance.

[0087] Step 9: After the mass displayed on the electronic balance stops increasing, adjust the pipeline valve to allow the gas flowing out of the core holder to flow to the gas flow meter and record the stable gas flow rate q2.

[0088] The drainage-aiding performance of the drainage aid is calculated using the following formula:

[0089] η = (q2 / q1) × 100%

[0090] In the formula: η is the drainage rate of the drainage aid, in %; q1 is the gas flow rate of the core under dry conditions, in L / min; q2 is the gas flow rate of the core after the experimental liquid is saturated, in L / min.

[0091] In steps 3, 4, 7, 8, and 9, the process of injecting gas through a gas cylinder with a pressure reducing valve can be replaced by injecting oil through a first water injection pump and a piston-type liquid tank to simulate the well drainage rate. Alternatively, other media or experimental materials can be used depending on the well conditions.

[0092] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of this disclosure, and will not be described in detail here.

[0093] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0095] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0097] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system for testing the performance of drainage aids, characterized in that, The performance testing system for the drainage aid includes a gas-liquid injection system, a formation adsorption simulation system (5), a core reaction simulation system (8), and a gas-liquid discharge detection system; the gas-liquid injection system is connected to the formation adsorption simulation system (5), the gas-liquid injection system is connected to the core reaction simulation system (8), the formation adsorption simulation system (5) is connected to the core reaction simulation system (8), and the core reaction simulation system (8) is connected to the gas-liquid discharge detection system; The gas-liquid injection system is used to inject experimental liquid into the formation adsorption simulation system (5) and core reaction simulation system (8) of the next-level device, and to inject gas. The formation adsorption simulation system (5) is used to fill the adsorbent and partially adsorb the drainage aid solution. The core reaction simulation system (8) is used to load a core with known permeability and to inject the drainage aid solution after passing through the formation adsorption simulation system (5) into the core; The gas-liquid discharge detection system is used to inject high-pressure gas or oil into the core in reverse by adjusting the pipeline valves, and then collect flow and pressure data for calculation after stabilization. During the experiment, the drainage aid solution was loaded into the gas-liquid injection system, the adsorbent was loaded into the formation adsorption simulation system (5), and the core with known permeability was loaded into the core reaction simulation system (8). The pipeline valves were adjusted so that the drainage aid solution first flowed through the formation adsorption simulation system (5) and then injected into the core of the core reaction simulation system (8). Then the pipeline valves were adjusted, and high-pressure gas or oil was injected into the core in reverse. After stabilization, the flow rate and pressure data were collected, the post-test permeability of the core was calculated, and the drainage aid rate of the drainage aid was calculated. Alternatively, the drainage aid rate of the drainage aid was calculated by collecting the flow rate and pressure data before and after the drainage aid solution was injected. The formation adsorption simulation system (5) consists of inner and outer tubes nested together in opposite directions. The inner and outer tubes are connected by threads, and the internal volume of the inner and outer tubes after the combination is adjusted by rotation. The outer thread of the outer tube is made of sealing rubber, and the inner and outer tubes can be sealed at any position.

2. The system for testing the performance of drainage aids according to claim 1, characterized in that, The gas-liquid injection system, formation adsorption simulation system (5), core reaction simulation system (8), and gas-liquid discharge detection system are all made of rigid materials and can withstand pressures of not less than 20 MPa.

3. The system for testing the performance of drainage aids according to claim 1, characterized in that, The gas-liquid injection system includes a first water pump (1), a piston-type liquid tank (3) and a gas cylinder (11). The first water pump (1) is connected to the piston-type liquid tank (3) through a pipeline (2). The piston-type liquid tank (3) is connected to the gas cylinder (11), the formation adsorption simulation system (5), and the core reaction simulation system (8) through a pipeline valve (4). The first water injection pump (1) is used to precisely control the flow rate and pressure, including two injection modes: constant flow and constant pressure. The piston-type liquid tank (3) is used in conjunction with the first water pump (1) to inject experimental liquid; the two ends of the piston are respectively the drainage aid solution and water. The first water pump (1) injects water and pushes the piston to discharge the drainage aid solution from the liquid tank. The gas cylinder (11) is used to inject gas; the gas cylinder (11) is equipped with a pressure reducing valve for controlling the gas pressure.

4. The system for testing the performance of drainage aids according to claim 3, characterized in that, The number of piston-type liquid tanks (3) includes at least one, and the liquid from any one piston-type liquid tank is injected into the next stage system through pipeline valves (4).

5. The system for testing the performance of drainage aids according to claim 3, characterized in that, The gas-liquid injection system is controlled by pipeline valve (4) to select whether to inject gas or liquid into the formation adsorption simulation system (5) or the core reaction simulation system (8); the gas or liquid flowing through the formation adsorption simulation system (5) is injected into the core reaction simulation system (8) through pipeline valve (4); the liquid or gas is finally introduced into the gas-liquid discharge detection system through pipeline valve (4).

6. The system for testing the performance of drainage aids according to claim 1, characterized in that, Both the inlet and outlet ends of the inner and outer tubes are equipped with filters (6) to prevent the adsorbent solid particles filled inside the formation adsorption simulation system (5) from flowing out.

7. The system for testing the performance of drainage aids according to claim 3, characterized in that, The core reaction simulation system (8) includes a metal outer cylinder and a rubber cylinder. The rubber cylinder passes through the metal outer cylinder and is connected to the metal outer cylinder at both ends. The annulus between the metal outer cylinder and the rubber cylinder is closed and is connected to the second water injection pump (7) through a pipeline for fixing the core. The annular cavity is filled with clean water and pressure is provided by a connected second water pump (7). The rubber cylinder is used to load the experimental rock core and a metal pipe of the same diameter. The two ends of the metal pipe are connected, one end is connected to the rock core and the other end is connected to the pipeline.

8. The system for testing the performance of a drainage aid according to claim 7, characterized in that, The outer end of the metal tube is threaded and is fixed to the outer cylinder of the core reaction simulation system (8) by the thread.

9. A performance testing system for drainage aids according to claim 7, characterized in that, The gas-liquid discharge detection system includes an electronic balance (12), a beaker (9) and a gas flow meter (10). The electronic balance (12) is equipped with a beaker (9). The beaker (9) is connected to the outlet of the core reaction simulation system (8) through a first pipeline and pipeline valve. The beaker (9) is also connected to the inlet of the formation adsorption simulation system (5) and the core reaction simulation system (8) through a second pipeline and pipeline valve.

10. A performance testing system for drainage aids according to claim 9, characterized in that, The adsorbent includes ceramsite, quartz sand, or rock chips.

11. A performance testing system for drainage aids according to claim 9, characterized in that, The excretion-aiding rate of the excretion-aiding agent is calculated using the following formula: ； In the formula: The excretion-aiding rate of the excretion-aiding agent; This represents the gas flow rate under dry core conditions. This represents the gas flow rate of the core after the experimental liquid has become saturated.

12. A method for using a performance testing system for a drainage aid according to any one of claims 9-11, the method comprising the following steps: Step 1: Connect the power supply, fill the piston-type liquid tank of the drainage aid performance testing system with experimental liquid, fill the formation adsorption simulation system with ceramsite, quartz sand or rock fragments, and load a rock core with known permeability into the core reaction simulation system. Step 2: Turn on the second water injection pump connected to the core reaction simulation system and adjust it to the predetermined pressure; Step 3: Adjust the pipeline valves to allow the gas in the gas cylinder to pass through the core reaction simulation system and flow to the gas flow meter; Step 4: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, and record the stable gas flow rate. ; Step 5: Adjust the pipeline valves, open the first water injection pump connected to the piston-type liquid tank, set the injection mode and parameters, and drive the experimental liquid in the piston-type liquid tank to the formation adsorption simulation system. At this time, some of the drainage aid in the experimental liquid will be adsorbed onto the ceramsite, quartz sand or rock fragments. Step 6: Continue injecting experimental liquid until the experimental liquid flows through the core reaction simulation system and onto the beaker of the electronic balance in the gas-liquid discharge detection system. At this point, the core is saturated with experimental liquid containing less discharge aid. Step 7: Adjust the pipeline valves so that the gas in the gas cylinder can pass through the core reaction simulation system and flow to the beaker on the electronic balance; Step 8: Adjust the pressure reducing valve of the gas cylinder to the minimum, open the gas cylinder, and adjust the pressure reducing valve of the gas cylinder to the predetermined pressure, which is the same as in step 4. At this time, the experimental liquid in the core will be discharged into the beaker on the electronic balance. Step 9: After the mass displayed on the electronic balance stops increasing, adjust the pipeline valves to allow the gas flowing out of the core reaction simulation system to flow to the gas flow meter, and record the stable gas flow rate. ; The drainage-aiding performance of the drainage aid is calculated using the following formula: ； In the formula: The excretion-aiding rate of the excretion-aiding agent; This represents the gas flow rate under dry core conditions. This represents the gas flow rate of the core after the experimental liquid has become saturated.

Images