Visual simulation device for high-pressure filling of water control screen pipe

Abstract

The visual simulation device comprises a simulation unit, a data acquisition unit and a pump injection unit, a cross channel mechanism of the simulation unit is matched with one or more observation mechanisms of the simulation unit, a water control screen high-pressure filling observation pipeline is formed between the cross channel mechanism and the observation mechanisms, and the water control screen high-pressure filling observation pipeline is communicated with the data acquisition unit. And the data acquisition unit and the pump injection unit are communicated with the water control sieve tube high-pressure filling observation pipeline. The device has the beneficial effects that the device can be used for testing the displacement-pressure drop relation of the water control screen pipe, the relation between the displacement and the additional pressure drop of water nozzles with different sizes of water control screen pipes such as ICD / AICD / CAICD / Tesla and the like is obtained, and a basis is provided for optimization and related numerical calculation of the water control screen pipe. Influences of process parameters such as pump injection displacement, pressure and formation leakage on the high-pressure filling rule and effect of the water control screen pipe are conveniently investigated, reference is provided for optimization of the process parameters under different complex working conditions, and the applicability of the technology is improved.

Description

Technical Field

[0001] The present invention relates to the field of water control screen pipe simulation devices, and more particularly to a visual simulation device for high-pressure filling of water control screen pipes. Background Art

[0002] Most offshore oil fields are developed by completing horizontal wells. Most new wells show the characteristics of rapid water cut increase and high water cut in the early and middle stages. The average comprehensive water cut of old oil fields is as high as over 90%, and they are in the medium-high water cut and medium-high recovery period. Measures are urgently needed to stabilize oil and control water.

[0003] Currently, to achieve oil and water stabilization and control, a combination of water-control screens and gravel packing is often used. However, with the increasing complexity of well conditions, the effectiveness of this technique has diminished. Further experimental simulations are needed to investigate the filling patterns of water-control screens and optimize key process parameters to improve the technology's applicability in complex well conditions. However, existing inventions suffer from issues such as the inability to balance visibility with high pressure resistance, making it impossible to simulate the filling patterns of water-control screens under real-world operating conditions. Summary of the Invention

[0004] The present invention overcomes the deficiencies in the prior art and provides a visual simulation device for high-pressure filling of a water-control screen pipe.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A visual simulation device for high-pressure filling of a water-control screen tube comprises: a simulation unit, a data acquisition unit and a pumping unit; a cross-channel mechanism of the simulation unit cooperates with one or more observation mechanisms of the simulation unit; a water-control screen tube high-pressure filling observation pipeline is formed between the cross-channel mechanism and the observation mechanism; the data acquisition unit and the pumping unit are connected to the water-control screen tube high-pressure filling observation pipeline.

[0007] The cross-channel mechanism includes a first conversion joint, a second conversion joint, an outer straight pipe short section, a middle double male buckle short section and an inner double male buckle short section. The first conversion joint and the outer straight pipe short section are respectively arranged at both ends of the second conversion joint. The outer straight pipe short section is provided with multiple interfaces. The middle double male buckle short section and the inner double male buckle short section are nested in sequence in the outer straight pipe short section. The ends of the middle double male buckle short section and the inner double male buckle short section are matched with the second conversion joint. The inner double male buckle short section is provided with a screen tube, and the screen tube is connected with the second conversion joint through the inner double male buckle short section.

[0008] The observation mechanism is a pipe structure. The end of the observation mechanism is connected to the tail end of the outer straight pipe short section through a flange structure. Part of the middle layer double male buckle short section, part of the inner layer double male buckle short section and the screen pipe are nested in the observation mechanism. The annular pipeline formed between the outer layer straight pipe short section and the middle layer double male buckle short section is connected to the screen pipe through the observation mechanism. The observation mechanism is provided with a filling effect observation interface, a leakage simulation interface and an observation window.

[0009] The screen tube is provided with multiple water inlets, and the water inlets are provided with filter screens.

[0010] The number of observation windows is greater than two.

[0011] The pressure resistance of the observation mechanism is higher than 10MPa.

[0012] The beneficial effects of the present invention are:

[0013] 1. The water control screen pipe displacement-pressure drop relationship test obtains the relationship between the displacement and additional pressure drop of different sized nozzles of ICD / AICD / CAICD / Tesla water control screen pipes, providing a basis for the optimization of water control screen pipes and related numerical calculations.

[0014] 2. Investigate the influence of process parameters such as pumping displacement, pressure, and formation leakage on the high-pressure filling pattern and effect of water control screen pipes, provide reference for the optimization of process parameters under different complex working conditions, and improve the applicability of the technology.

[0015] 3. Investigate the influence of filling media such as filling particles and filling liquid on the high-pressure filling rules and effects of the water control screen pipe to optimize the filling medium.

[0016] 4. Compare the effects of different screen pipe and flush pipe combinations on the high-pressure filling rules and effects of water control screen pipes, and explore the feasibility of process ideas such as non-flushing pipe filling under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the simulation unit;

[0018] Figure 2 It is a structural diagram of the cross channel mechanism;

[0019] Figure 3 It is a structural diagram of the observation mechanism;

[0020] Figure 4 This is a working principle diagram of the utility model;

[0021] In the figure: 1. Simulation unit; 2. Data acquisition unit; 3. Pumping unit; 11. Cross-channel mechanism; 12. Observation mechanism; 111. First conversion joint; 112. Second conversion joint; 113. Outer straight pipe short section; 114. Middle double-male buckle short section; 115. Interface; 116. Inner double-male buckle short section; 121. Filling effect observation interface; 122. Leakage simulation interface; 123. Observation window. DETAILED DESCRIPTION

[0022] Example

[0023] A visual simulation device for high-pressure filling of a water-control screen tube comprises: a simulation unit 1, a data acquisition unit 2 and a pumping unit 3. A cross-channel mechanism 11 of the simulation unit 1 is cooperatively arranged with one or more observation mechanisms 12 of the simulation unit 1. A water-control screen tube high-pressure filling observation pipeline is formed between the cross-channel mechanism 11 and the observation mechanisms 12. The data acquisition unit 2 and the pumping unit 3 are connected to the water-control screen tube high-pressure filling observation pipeline.

[0024] The cross-channel mechanism 11 includes a first conversion joint 111, a second conversion joint 112, an outer straight pipe short section 113, a middle double male buckle short section 114 and an inner double male buckle short section 116. The first conversion joint 111 and the outer straight pipe short section 113 are respectively arranged at both ends of the second conversion joint 112. The outer straight pipe short section 113 is provided with a plurality of interfaces 115. The middle double male buckle short section 114 and the inner double male buckle short section 116 are nested in sequence in the outer straight pipe short section 113. The ends of the middle double male buckle short section 114 and the inner double male buckle short section 116 are matched with the second conversion joint 112. The inner double male buckle short section 116 is provided with a screen tube, which is connected to the second conversion joint 112 through the inner double male buckle short section 116.

[0025] The observation mechanism 12 is a pipe structure. The end of the observation mechanism 12 is connected to the tail end of the outer straight pipe short section 113 through a flange structure. Part of the middle layer double male buckle short section 114, part of the inner layer double male buckle short section 116 and the screen pipe are nested in the observation mechanism 12. The annular pipeline formed between the outer layer straight pipe short section 113 and the middle layer double male buckle short section 114 is connected to the screen pipe through the observation mechanism 12. The observation mechanism 12 is provided with a filling effect observation interface 121, a leakage simulation interface 122115 and an observation window 123.

[0026] The screen tube is provided with multiple water inlets, and the water inlets are provided with filter screens.

[0027] The number of observation windows 123 is greater than two.

[0028] The pressure resistance of the observation mechanism 12 is higher than 10 MPa.

[0029] like Figure 1-4As shown, the steps of using the utility model are as follows:

[0030] 1. Connect the cross-channel mechanism 11 and the observation mechanism 12 of the simulation unit 1 in sequence, and adjust the leakage amount through the leakage simulation interface 122 of the observation mechanism 12;

[0031] 2. Connect the data acquisition unit 2 and the pumping unit 3, and test the pressure to 6-10MPa to ensure that the device is connected completely and there is no pressure leakage;

[0032] 3. Start the pumping unit 3, conduct a test cycle with clean water, change the pumping displacement, and test the law of pressure change with displacement;

[0033] 4. After the test cycle is normal, start adding sand, and the sand ratio is 3%-10% by volume. The influence of different sand ratios on the filling effect can be tested by changing the sand ratio;

[0034] 5. The slurry is pumped into the annulus of the screen tube and the outer string of the simulation device through the pumping unit 3 at a certain displacement and sand ratio. The filling particles remain in the annulus, and the water returns to the liquid tank of the pumping unit 3 through the screen tube for recycling;

[0035] 6. Continue pumping the mortar until the annulus between the screen and the outer string of the simulation device is filled or stop pumping when sand blockage occurs. During the filling process, the flow pattern of the mortar can be observed and recorded through the observation window 123 of the observation mechanism 12.

[0036] 7. After stopping the pumping, release the pressure, remove the plug and pressure sensor on the observation mechanism 12, and observe the filling effect;

[0037] 8. Connect the high-pressure pipeline from the cross-channel mechanism 11 to the recovery tank of the pumping unit 3 to circulate and recover the particles in preparation for the next set of tests.

[0038] The data acquisition unit 2 is used to record test data and curves. The pumping unit 3 includes a liquid tank, a stirrer, an injection pump, an injection pipeline, a recovery tank, and other devices, which are used in combination. By adjusting the opening of the loss simulation interface 122, the overall loss rate is adjusted to simulate formation loss. After filling is completed, the plug of the loss simulation interface 122 can be opened to observe the density of the filling layer and evaluate the filling and compaction effect.

[0039] In this embodiment, there are 3-5 interfaces 115, each equipped with a plug for connection to the data acquisition unit 2 and the pumping unit 3. The observation windows 123 are made of a high-temperature resistant transparent material, and each observation mechanism 12 has at least two observation windows. The leakage simulation interface 122 includes a filter to prevent debris from entering the tube during the experiment.

[0040] like Figure 1 and Figure 2As shown, the cross channel mechanism 11 is installed and used in conjunction with one or more observation mechanisms 12. When in use, it is connected to the data acquisition unit 2 and the pumping unit 3 through the interface 115, respectively, for injecting mortar and collecting data. Figure 4 As shown, when in use, mortar is injected through the pumping unit 3. The mortar passes through the interface 115 and enters the annular pipeline formed between the outer straight pipe short section 113 and the middle double male buckle short section 114, and then enters the pipeline formed by the screen tube and the inner wall of the observation mechanism 12. The sand in the mortar is blocked by the filter in the screen tube and stays in the space formed by the screen tube and the inner wall of the observation mechanism 12. The water in the mortar enters the inner side of the screen tube, passes through the inner double male buckle short section 116, the second conversion joint 112 and the first conversion joint 111, and then flows back into the pumping unit 3 for continued use. Figure 3 As shown, the observation mechanism 12 is provided with a filling effect observation interface 121 and an observation window 123 for observation and information collection of simulation experiments, and the leakage adjustment simulation interface 122 is used to adjust the overall leakage amount to achieve simulation of formation leakage.

[0041] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A visual simulation device for high-pressure filling of water-control screen tubes, characterized in that: include: The simulation unit, the data acquisition unit and the pumping unit, the cross-channel mechanism of the simulation unit and one or more observation mechanisms of the simulation unit are arranged in coordination, a water control screen tube high-pressure filling observation pipeline is formed between the cross-channel mechanism and the observation mechanism, and the data acquisition unit and the pumping unit are connected to the water control screen tube high-pressure filling observation pipeline.

2. A visual simulation device for high-pressure filling of a water-control screen according to claim 1, characterized in that: The cross-channel mechanism includes a first conversion joint, a second conversion joint, an outer straight pipe short section, a middle double male buckle short section and an inner double male buckle short section. The first conversion joint and the outer straight pipe short section are respectively arranged at both ends of the second conversion joint. The outer straight pipe short section is provided with multiple interfaces. The outer straight pipe short section is nested with the middle double male buckle short section and the inner double male buckle short section in sequence. The ends of the middle double male buckle short section and the inner double male buckle short section are matched with the second conversion joint. The inner double male buckle short section is provided with a screen tube, and the screen tube is connected with the second conversion joint through the inner double male buckle short section.

3. A visual simulation device for high-pressure filling of a water-control screen according to claim 2, characterized in that: The observation mechanism is a pipe body structure, and the end of the observation mechanism is connected to the tail end of the outer straight pipe short section through a flange structure. Part of the middle layer double male buckle short section, part of the inner layer double male buckle short section and the screen pipe are nested in the observation mechanism. The annular pipeline formed between the outer layer straight pipe short section and the middle layer double male buckle short section is connected to the screen pipe through the observation mechanism. The observation mechanism is provided with a filling effect observation interface, a leakage simulation interface and an observation window.

4. A visual simulation device for high-pressure filling of a water-control screen according to claim 2, characterized in that: The screen tube is provided with a plurality of water inlets, and the water inlets are provided with filter screens.

5. The visual simulation device for high-pressure filling of a water-control screen according to claim 3, characterized in that: The number of the observation windows is greater than two.

6. The visual simulation device for high-pressure filling of a water-control screen according to claim 1, characterized in that: The pressure resistance value of the observation mechanism is higher than 10 MPa.

Images