CN212376640U - Natural gas hydrate reservoir horizontal well exploitation sand production simulation experiment device - Google Patents
Natural gas hydrate reservoir horizontal well exploitation sand production simulation experiment device Download PDFInfo
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- CN212376640U CN212376640U CN202020803893.4U CN202020803893U CN212376640U CN 212376640 U CN212376640 U CN 212376640U CN 202020803893 U CN202020803893 U CN 202020803893U CN 212376640 U CN212376640 U CN 212376640U
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Abstract
The utility model relates to a sand simulation experiment device is mined out to natural gas hydrate reservoir horizontal well, including main part reaction system, gas supply system, liquid supply system, injection system, observation system, separation collecting system and temperature control system, gas supply system is connected with injection system and main part reaction system respectively, and liquid supply system is connected with main part reaction system and injection system respectively, is equipped with observation system on separation collecting system and main part reaction system's connecting pipeline, and temperature control system is connected with main part reaction system. The method can simulate the process of exploiting and producing sand of a gas hydrate reservoir horizontal well under different production stress conditions, and based on the pressure change characteristics and the change of permeability in the gravel filling layer, the influences of non-uniform blockage of the gravel layer and the property of sand-carrying fluid on the blockage degree in the process of exploiting the hydrate reservoir horizontal well are evaluated, so that reference is provided for the blockage mechanism analysis of sand blocking media and the safe and efficient development of hydrates in the process of exploiting the hydrate reservoir hydrates.
Description
Technical Field
The utility model relates to a natural hydrate simulation experiment field, especially a natural gas hydrate reservoir horizontal well exploitation sand production simulation experiment device.
Background
Natural gas hydrate is regarded as a strategic alternative energy source of future oil and natural gas by countries in the world due to the advantages of wide distribution, large resource amount, no pollution and the like. In the process of exploiting the hydrate, the sand production of the reservoir can be caused by the phase change and the reduction of the reservoir strength, and the high-efficiency development of the hydrate is seriously restricted. Hydrate pilot mining in more intermission in canada in 2007 and hydrate pilot mining in the southern sea at 2013 in japan show that reservoir sand production is a key problem which plagues long-term exploitation of natural gas hydrates. Therefore, to achieve long-term stable commercial exploitation of natural gas hydrates, the difficult problem of sand production from hydrate reservoirs must be overcome.
In the sand prevention design and construction process, the productivity of fully releasing a natural gas hydrate reservoir is considered, the yield is improved, and the sand blockage is prevented from affecting the exploitation process. In order to achieve the purpose of increasing the production, the development of a natural gas hydrate reservoir through a horizontal well becomes an important means. The well track, the sand control and sand control screen pipe structure and the sand blocking medium performance of the horizontal well determine the sand blocking effect and the yield increasing effect, and have important significance for the gravel packing and sand control of the horizontal well of the hydrate reservoir. However, how to evaluate the sand control effect of the hydrate reservoir horizontal well gravel pack sand control process, and preferably select the sand control screen pipe and the sand blocking medium, becomes a key problem to be solved at present for the sand control process.
In addition, for the natural gas hydrate production process, whether the free sand with smaller particles enter the wellbore through the sand control screen or the skeleton sand with smaller particles for hydrate cementation and their migration rules in the wellbore still need to be further explored. If the sand control screen pipe can combine the simulation of the exploitation process of the horizontal well of the hydrate reservoir with the gravel packing sand control screen pipe mode and is provided with auxiliary observation and recognition equipment, the simulation of the exploitation process and the quantitative observation of the sand production characteristics under the gravel packing sand control condition of the horizontal well of the hydrate reservoir can be realized, the main sand production position in the stratum and the sand migration rule in the shaft can be analyzed, the sand production rule, the sand source and the sand migration characteristic in the shaft of the horizontal well of the natural gas hydrate in the exploitation process of the stratum can be explored, and therefore reference is provided for the design of the gravel packing parameters of the horizontal well and the exploitation scheme.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned defect that prior art exists, a natural gas hydrate reservoir horizontal well is exploited and is sand out simulation experiment device is proposed, can simulate natural gas hydrate reservoir horizontal well exploitation sand out process under the different production stress condition, change based on permeability in pressure variation characteristic and the gravel packing layer, the jam characteristic and the stress state of sand-blocking medium among the analysis hydrate reservoir sand out process, gravel packing layer parameter, sand control screen pipe type and the influence law of factors such as sand-carrying fluid property to the jam characteristic, the inhomogeneous jam of gravel layer and the influence of sand-carrying fluid property to the jam degree among the evaluation hydrate reservoir horizontal well exploitation process can provide the reference for the safe high-efficient development of the jam mechanism analysis of sand-blocking medium and hydrate among the hydrate reservoir exploitation process.
The technical scheme of the utility model is that: a simulation experiment device for exploiting and producing sand of a horizontal well of a natural gas hydrate reservoir comprises a main reaction system, a gas supply system, a liquid supply system, an injection system, an observation system, a separation and collection system and a temperature control system, wherein the gas supply system is respectively connected with the injection system and the main reaction system;
the main reaction system comprises a pressure-resistant reaction kettle, a shunting block, a simulated hydrate reservoir, a gravel filling layer, a sand control sieve tube, a temperature and pressure sensor and end covers, wherein the pressure-resistant reaction kettle is arranged in the horizontal direction and is hollow, the pressure-resistant reaction kettle and the end covers at two ends form a closed cavity, the shunting block, the simulated hydrate reservoir, the gravel filling layer and the sand control sieve tube are arranged in the cavity, a confining pressure liquid inlet is arranged on the side wall of the pressure-resistant reaction kettle and is connected with an outlet of an injection system, an outlet is arranged on the end cover and is connected with a separation and collection system through a connecting pipeline, the shunting block is arranged on the inner side of the pressure-resistant reaction kettle, two ends of the shunting block are respectively abutted against the inner walls of the two end covers, the shunting block is a circular tube body, small holes are uniformly arranged on the side wall of the shunting block at intervals, the simulated hydrate, the layer height ratio of the simulated hydrate reservoir stratum to the gravel packing layer is 2:1, a plurality of temperature and pressure sensors are arranged at two ends of the simulated hydrate reservoir stratum and are arranged at intervals along the circumferential direction of the simulated hydrate reservoir stratum, one end of each temperature and pressure sensor is fixed on an end cover, the other end of each temperature and pressure sensor is inserted into the simulated hydrate reservoir stratum, a sand control screen pipe is arranged on the inner side of the gravel packing layer, and two ends of each sand control screen pipe are fixedly connected with the end covers through connectors respectively;
the injection system comprises a stirrer, and an outlet of the stirrer is connected with a confining pressure liquid inlet of the main body reaction system through a connecting pipeline; the gas supply system comprises a gas cylinder, one outlet of the gas cylinder is connected with the stirrer through a connecting pipeline, and the other outlet of the gas cylinder is directly connected with the main body reaction system; the liquid supply system comprises a water tank, one outlet of the water tank is connected with the stirrer through a connecting pipeline, and the other outlet of the water tank is directly connected with the main body reaction system;
the observation system comprises a simulation shaft, a camera, a laser and a plug, wherein one end of the simulation shaft is connected with an outlet on an end cover, the other end of the simulation shaft is provided with the plug, the plug is connected with the separation and collection system through a connecting pipeline, a plurality of transparent windows are arranged on the wall of the simulation shaft at intervals, and the camera and the laser are arranged on the outer side of the simulation shaft;
the separation and collection system comprises a gas-liquid-solid separator, a water collecting tank and a gas collecting bottle, wherein an inlet of the gas-liquid-solid separator is connected with an outlet of the pressure-resistant reaction kettle through a connecting pipeline, a water outlet of the gas-liquid-solid separator is connected with the water collecting tank, and a gas outlet of the gas-liquid-solid separator is connected with the gas collecting bottle.
The utility model discloses in, through the holding bolt fixed connection that the interval set up between withstand voltage reation kettle and the end cover, holding screw sets up on the end cover.
The supporting seat is arranged below the pressure-resistant reaction kettle, the supporting seat is fixedly connected with the bottom of the pressure-resistant reaction kettle through a vertical pipe, a plurality of vertical pipe connecting blocks are fixed at the bottom of the pressure-resistant reaction kettle, the top end of the vertical pipe is fixedly connected with the vertical pipe connecting blocks, and the bottom of the vertical pipe is fixedly connected with the supporting seat.
A pump I, a flowmeter I, a pressure gauge I and a valve I are sequentially arranged on a connecting pipeline of the stirrer and the pressure-resistant reaction kettle.
A flow meter II and a valve III are sequentially arranged on a connecting pipeline of the gas cylinder and the stirrer and used for inputting gas into the stirrer; a connecting pipeline of the gas cylinder and the pressure-resistant reaction kettle is sequentially provided with a flowmeter II, a valve I and a pressure gauge I and is used for providing gas for simulating synthesis of hydrate in the hydrate storage layer.
A pump II and a valve V are sequentially arranged on a connecting pipeline of the water tank and the stirrer and are used for inputting liquid into the stirrer; and a pump II, a pressure gauge II and a valve IV are sequentially arranged on a connecting pipeline of the water tank and the pressure-resistant reaction kettle.
The upper end and the lower end of the support frame are respectively fixedly connected with the outer wall of the end cover through a support vertical pipe, the support vertical pipe is fixedly connected with the outer wall of the end cover through a connecting block, and the simulation shaft penetrates through a center hole of the support frame. The supporting vertical pipe and the supporting frame play a supporting role in the simulation shaft.
The temperature control system comprises a thermostat, the pressure-resistant reaction kettle is placed in the thermostat, and the temperature in the pressure-resistant reaction kettle is controlled and maintained through the thermostat.
And a pressure gauge III and a back pressure valve are sequentially arranged on a connecting pipeline of the gas-liquid-solid separator and the pressure-resistant reaction kettle.
The device also comprises a data processing system which is respectively connected with the liquid supply system, the gas supply system, the injection system, the main body reaction system and the separation and collection system and comprises a computer and a data processor.
The utility model has the advantages that:
(1) simulating the sand production characteristic of the hydrate reservoir horizontal well under the gravel packing sand prevention condition: simulating a sand production process of a hydrate reservoir under the exploitation condition of the horizontal well, analyzing the blocking characteristic of a sand blocking medium according to the permeability and the pressure change characteristic of a gravel packing layer, and exploring the influence of a stress state on the sand production characteristic of the horizontal well by comparing sand production rules under different stress conditions;
(2) respectively carrying out optical treatment and dyeing on the fine sand particles and the simulated hydrate reservoir sand by using different fluorescent agents, wherein a camera can collect particle images in a simulated shaft under the laser irradiation condition and distinguish different particles; the migration characteristic and the distribution rule of stratum sand particles in the shaft in the process of gas hydrate horizontal well exploitation can be analyzed based on the distribution and the concentration of the tracer particles in the shaft, and the stratum sand production position and the stratum sand particle migration rule are further explored;
(3) non-uniform blocking characteristic analysis of a filling gravel layer in a sand production process of a hydrate reservoir: in the process of reservoir sand production, due to the heterogeneity of the sand blocking medium pores and the heterogeneity of the sand particles in the stratum retained in the sand blocking medium, the blocking degrees of the sand blocking medium at different positions are very different. By monitoring the pressure change conditions of different positions of the gravel packed bed, the characteristics and the influence factors of uneven blockage caused by stratum sand particles entering the gravel packed bed in the process of horizontal well exploitation are analyzed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a front view schematic of the end cap;
fig. 3 is a schematic structural diagram of a visual inspection system.
In the figure: 1, a pressure-resistant reaction kettle; 2, a shunting block; 3, a temperature and pressure sensor; 4, a joint; 5, controlling a sand screen pipe; 6, vertical pipe fixing blocks; 7, a vertical pipe; 8, supporting a seat; 9, a constant temperature box; 10, a vertical pipe connecting block; 11 end caps; 12, connecting blocks; 13 supporting frames; 14 supporting a riser; 15 a transparent window; 16 simulating a wellbore; 17 a camera; 18 a laser; 19 a plug; 20 gravel pack layers; 21 simulating a hydrate reservoir; 22 confining pressure liquid inlet; 23, a valve I; 24, a pressure gauge I; 25, a flowmeter I; 26, a pump I; 27 a stirrer; 28 valve III; 29 flow meter II; 30, a valve II; 31 gas cylinders; 32, a valve V; 33, pump II; 34 a pressure gauge II; 35 a valve IV; 36 water tanks; 37 a back pressure valve; 38, a pressure gauge III; 39 gas-liquid-solid separator; 40, a flow meter III; 41 gas collection bottle; 42 a water collection tank; the bolts are tightened 43.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below.
As shown in fig. 1, the simulation experiment device for exploiting and producing sand of the horizontal well of the natural gas hydrate reservoir comprises a main reaction system, a gas supply system, a liquid supply system, an injection system, an observation system, a separation and collection system and a temperature control system, wherein the gas supply system is respectively connected with the injection system and the main reaction system, the liquid supply system is respectively connected with the main reaction system and the injection system, the connection pipeline between the separation and collection system and the main reaction system is provided with the observation system, and the temperature control system is connected with the main reaction system.
The main body reaction system comprises a pressure-resistant reaction kettle 1, a shunting block 2, a simulated hydrate reservoir 21, a gravel packing layer 20, a sand control screen pipe 5, a temperature and pressure sensor 3 and an end cover 11. The pressure-resistant reaction kettle 1 is arranged in the horizontal direction, the interior of the pressure-resistant reaction kettle 1 is hollow, the pressure-resistant reaction kettle 1 and the end covers 11 at two ends form a closed cavity, and the shunting block 2, the simulated hydrate reservoir stratum 21, the gravel filling layer 20 and the sand control sieve tube 5 are arranged in the cavity. As shown in fig. 2, the pressure-resistant reactor 1 and the end cover 11 are fixedly connected by fastening bolts 43 provided at intervals, and the fastening bolts 43 are provided on the end cover 11. The side wall of the pressure-resistant reaction kettle 1 is provided with a confining pressure liquid inlet 22, the confining pressure liquid inlet 22 is connected with an outlet of the injection system, and sand-carrying fluid is injected into the pressure-resistant reaction kettle 1 through the confining pressure liquid inlet 22 in the displacement process. The end cover 11 is provided with an outlet, and the outlet is connected with the separation and collection system through a connecting pipeline. The inboard of withstand voltage reation kettle 1 is equipped with shunting block 2, and shunting block 2's both ends support the inner wall at both ends lid 11 respectively, and shunting block 2 is the pipe body, and even interval sets up aperture or strip seam on the lateral wall of this pipe body for the guarantee is injected takes sand fluid even to flow in. The inner side of the shunting block 2 is provided with a simulated hydrate reservoir stratum 21, the inner side of the simulated hydrate reservoir stratum 21 is provided with a gravel packing layer 20, and the layer height ratio of the simulated hydrate reservoir stratum 21 to the gravel packing layer 20 is 2: 1. Both ends of the simulated hydrate reservoir stratum 21 are provided with a plurality of temperature and pressure sensors 3, as shown in fig. 2, the temperature and pressure sensors 3 are arranged at intervals along the circumferential direction of the simulated hydrate reservoir stratum 21, one end of each temperature and pressure sensor 3 is fixed on the end cover 11, and the other end of each temperature and pressure sensor is inserted into the simulated hydrate reservoir stratum 21 and used for testing the pressure change conditions of different positions in the simulated hydrate reservoir stratum 21. The inner side of the gravel packing layer 20 is provided with a sand control screen pipe 5, two ends of the sand control screen pipe 5 are respectively and fixedly connected with the joint 4, and the joint 4 is fixedly connected with the inner wall of the end cover 11, so that the connection of the sand control screen pipe 5 and the end cover 11 is realized. The sand control screen 5 plays a role in sand control.
The below of withstand voltage reation kettle 1 is equipped with supporting seat 8, through riser 32 fixed connection between supporting seat 8 and withstand voltage reation kettle 1's the bottom: the bottom of the pressure-resistant reaction kettle 1 is fixed with a plurality of vertical pipe connecting blocks 10, the top ends of the vertical pipes 32 are fixedly connected with the vertical pipe connecting blocks 10, and the bottoms of the vertical pipes 32 are fixedly connected with the supporting seats 8. The pressure-resistant reaction kettle 1 is supported by the supporting seat 8.
The injection system comprises a stirrer 27, the outlet of the stirrer 27 is connected with the confining pressure liquid inlet 22 of the main reaction system through a connecting pipeline, methane gas, water and fine sand particles are added into the stirrer 27, the stirrer 27 stirs for a certain time to uniformly mix the methane gas, the water and the fine sand particles, and the obtained sand-carrying fluid enters the pressure-resistant reaction kettle 1 through the confining pressure liquid inlet 22. A connecting pipeline between the stirrer 27 and the pressure-resistant reaction kettle is sequentially provided with a pump I26, a flow meter I25, a pressure gauge I24 and a valve I23.
The gas supply system comprises a gas cylinder 31, one outlet of the gas cylinder 31 is connected with the stirrer 27 through a connecting pipeline, and a flow meter II 29 and a valve III 28 are sequentially arranged on the connecting pipeline of the gas cylinder 31 and the stirrer 27 and used for inputting gas into the stirrer 27; the other outlet of the gas cylinder 31 is directly connected with the main body reaction system, and a flow meter II 29, a valve II 30, a valve I23 and a pressure gauge I24 are sequentially arranged on a connecting pipeline of the gas cylinder 31 and the pressure-resistant reaction kettle 1 and are used for providing gas for simulating the synthesis of the hydrate in the hydrate reservoir stratum 21.
The liquid supply system comprises a water tank 36, one outlet of the water tank 36 is connected with the stirrer 27 through a connecting pipeline, and a pump II 33 and a valve V are sequentially arranged on the connecting pipeline of the water tank 36 and the stirrer 27 and used for inputting liquid into the stirrer 27; the other outlet of the water tank 36 is directly connected with the main body reaction system, and a pump II 33, a pressure gauge II 34 and a valve IV 35 are sequentially arranged on a connecting pipeline of the water tank 36 and the pressure-resistant reaction kettle 1.
The observation system comprises a simulated shaft 16, a camera 17, a laser 18 and a plug 19, wherein one end of the simulated shaft 16 is connected with an outlet on the end cover 11, the other end of the simulated shaft 16 is provided with the plug 19, and the plug 19 is connected with the separation and collection system through a connecting pipeline and used for leading out mixed fluid. A plurality of transparent windows 15 are arranged on the wall of the simulation shaft 16 at intervals, a camera 17 and a laser 18 are arranged on the outer side of the simulation shaft 16, and the transparent windows 15 are matched with the laser 18 and the camera 17, so that observation and identification of sand grains in the simulation shaft can be realized. As shown in fig. 3, after irradiation via laser 18 during the experiment, the sand in the simulated wellbore 16 may be monitored by camera 17. Because the sand grains subjected to different dyeing processes can be identified through the monitoring images, in the embodiment, the fine sand from the injection system is dyed into A sand grains, and the sand in the simulated hydrate reservoir is dyed into B sand grains, so that the device can simulate the source and distribution characteristics of the well bore sand grains, and further can explore the reservoir sand production characteristics and the migration rule of the sand grains in the simulated well bore.
The support risers 14 and the support stands 13 support the simulated wellbore 16. The upper end and the lower end of the support frame 13 are respectively fixedly connected with the outer wall of the end cover 11 through a support vertical pipe 14, the support vertical pipe 14 is fixedly connected with the outer wall of the end cover through a connecting block 12, and the simulation shaft 16 penetrates through a center hole of the support frame 13 and is connected with the support frame through a gasket and the like in an auxiliary mode.
The separation and collection system comprises a gas-liquid-solid separator 39, a water collection tank 42 and a gas collection bottle 41, wherein the inlet of the gas-liquid-solid separator 39 is connected with the outlet of the pressure-resistant reaction kettle 1 through a connecting pipeline, and a pressure gauge III 38 and a back pressure valve 37 are sequentially arranged on the connecting pipeline of the gas-liquid-solid separator 39 and the pressure-resistant reaction kettle 1. The water outlet of the gas-liquid-solid separator 39 is connected with the water collecting tank 42, and the gas outlet of the gas-liquid-solid separator 39 is connected with the gas collecting bottle 41.
The temperature control system comprises a constant temperature box 9, the pressure-resistant reaction kettle 1 is placed in the constant temperature box 9, and the temperature in the pressure-resistant reaction kettle 1 is controlled and maintained through the constant temperature box 9.
The device also comprises a data processing system, wherein the data processing system is respectively connected with the liquid supply system, the gas supply system, the injection system, the main body reaction system and the separation and collection system, and comprises a computer and a data processor, so that the functions of data acquisition, data arrangement and regulation and control are achieved. The data processor is provided with a plurality of connecting wires, is connected with testing equipment such as a flowmeter, a temperature and pressure sensor and the like through the connecting wires, displays and controls through a computer, and then completes the monitoring work of test data.
The working process of simulating the sand production rule by using the device is as follows:
in the first step, the sample is loaded. Installing a high-pressure reaction kettle and a sand control sieve tube, mixing quartz sand with a certain amount of SDS solution, then filling the mixture into a simulated hydrate reservoir part, then filling ceramsite into a filling gravel layer, and fully compacting;
and secondly, sealing and detecting leakage. Installing the end cover 11 and fixing by the fastening bolt 43, sealing the pressure-resistant reaction kettle 1, connecting the outlet of the injection system with the fluid inlet of the pressure-resistant reaction kettle 1, connecting the inlet of the separation and collection system with the fluid outlet of the pressure-resistant reaction kettle 1, and checking the air tightness of the pressure-resistant reaction kettle.
And thirdly, simulating the synthesis of hydrate in the reservoir. And introducing methane gas into the main reaction system, cooling the methane gas through a constant temperature box 9 to synthesize hydrate, and finishing the synthesis of the hydrate when the gas pressure is kept unchanged.
And fourthly, displacing. Adding methane gas, water and fine sand particles into the stirrer 27 according to a certain proportion through the gas supply system and the liquid supply system, and stirring for a certain time by using the stirrer 27 to uniformly mix the methane gas, the water and the fine sand particles; injecting the stirred mixed solution into the pressure-resistant reaction kettle 1 at a certain speed through a pump I26, finishing the displacement for a certain time, and respectively recording the change conditions of the flow, the temperature and the pressure along with the time in the displacement process through a flowmeter I25, a temperature and pressure sensor 3 and a pressure gauge I24; separating the mixed fluid passing through the pressure-resistant reaction kettle by a gas-liquid-solid separation system, and storing the separated mixed fluid by a gas collection bottle, a water collection tank and the like;
and fifthly, observing. Opening a laser 18, irradiating mixed fluid in a simulated well bore 16 through a transparent window 15, recording the distribution and concentration of different tracer particles in the simulated well bore through a camera 17, analyzing the sequence and distribution characteristics of added fine sand particles (free sand particles in simulated far-end stratum pores) and simulated hydrate reservoir sand (simulated stratum framework coarse sand) at specific positions in the simulated well bore, and further exploring the distribution characteristics and migration rules of the stratum sand particles in the simulated well bore in the well bore.
And sixthly, analyzing influence factors. The sand production amount is analyzed through a collecting and separating system, the influence rule of factors such as the thickness of a gravel layer, the grain diameter of ceramsite, the type of the sand control screen pipe, the displacement time and the like on the sand production amount is analyzed, and the design and construction method of the gravel filling sand control screen pipe sand control method is established.
And seventhly, measuring and analyzing the pressure. Collecting and analyzing the pressure change conditions of different positions in the simulated hydrate reservoir and the gravel packing layer, calculating the permeability change rule and the uneven plugging rule of different positions of the simulated hydrate reservoir, and analyzing the plugging characteristic of the gravel packing layer.
It is right above the utility model provides a sand production simulation experiment device is exploited to natural gas hydrate reservoir horizontal well has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a sand production simulation experiment device is exploited to gas hydrate reservoir horizontal well which characterized in that: the system comprises a main body reaction system, a gas supply system, a liquid supply system, an injection system, an observation system, a separation and collection system and a temperature control system, wherein the gas supply system is respectively connected with the injection system and the main body reaction system;
the main body reaction system comprises a pressure-resistant reaction kettle (1), a shunting block (2), a simulated hydrate reservoir (21), a gravel packing layer (20), a sand control sieve tube (5), a temperature and pressure sensor (3) and an end cover (11), wherein the pressure-resistant reaction kettle (1) is arranged in the horizontal direction and is hollow, the pressure-resistant reaction kettle (1) and the end covers (11) at two ends form a closed cavity, the shunting block (2), the simulated hydrate reservoir (21), the gravel packing layer (20) and the sand control sieve tube (5) are arranged in the cavity, a confining pressure liquid inlet (22) is arranged on the side wall of the pressure-resistant reaction kettle (1), the confining pressure liquid inlet (22) is connected with an outlet of an injection system, an outlet is arranged on the end cover (11), the outlet is connected with a separation and collection system through a connecting pipeline, the shunting block (2) is arranged on the inner side of the pressure-resistant reaction kettle (1), two ends of the shunting block (2) are respectively, the flow distribution block (2) is a circular pipe body, small holes are uniformly arranged on the side wall of the flow distribution block (2) at intervals, a simulated hydrate reservoir (21) is arranged on the inner side of the flow distribution block (2), a gravel packed layer (20) is arranged on the inner side of the simulated hydrate reservoir (21), the layer height ratio of the simulated hydrate reservoir (21) to the gravel packed layer (20) is 2:1, a plurality of temperature and pressure sensors (3) are arranged at two ends of the simulated hydrate reservoir (21), the temperature and pressure sensors (3) are arranged at intervals along the circumferential direction of the simulated hydrate reservoir (21), one ends of the temperature and pressure sensors (3) are fixed on an end cover (11), the other ends of the temperature and pressure sensors are inserted into the simulated hydrate reservoir (21), a sand control sieve pipe (5) is arranged on the inner side of the gravel packed layer (20), and two ends of the sand control sieve pipe (5) are fixedly;
the injection system comprises a stirrer (27), and an outlet of the stirrer (27) is connected with a confining pressure liquid inlet (22) of the main body reaction system through a connecting pipeline; the gas supply system comprises a gas cylinder (31), one outlet of the gas cylinder (31) is connected with the stirrer (27) through a connecting pipeline, and the other outlet of the gas cylinder (31) is directly connected with the main body reaction system; the liquid supply system comprises a water tank (36), one outlet of the water tank (36) is connected with the stirrer (27) through a connecting pipeline, and the other outlet of the water tank (36) is directly connected with the main body reaction system;
the observation system comprises a simulation shaft (16), a camera (17), a laser (18) and a plug (19), one end of the simulation shaft (16) is connected with an outlet on an end cover (11), the other end of the simulation shaft (16) is provided with the plug (19), the plug (19) is connected with a separation and collection system through a connecting pipeline, a plurality of transparent windows (15) are arranged on the wall of the simulation shaft (16) at intervals, and the camera (17) and the laser (18) are arranged on the outer side of the simulation shaft (16);
the separation and collection system comprises a gas-liquid-solid separator (39), a water collection tank (42) and a gas collection bottle (41), wherein an inlet of the gas-liquid-solid separator (39) is connected with an outlet of the pressure-resistant reaction kettle (1) through a connecting pipeline, a water outlet of the gas-liquid-solid separator (39) is connected with the water collection tank (42), and a gas outlet of the gas-liquid-solid separator (39) is connected with the gas collection bottle (41).
2. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: the pressure-resistant reaction kettle (1) is fixedly connected with the end cover (11) through fastening bolts (43) arranged at intervals, and the fastening bolts (43) are arranged on the end cover (11).
3. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: the pressure-resistant reaction kettle is characterized in that a supporting seat (8) is arranged below the pressure-resistant reaction kettle (1), the supporting seat (8) is fixedly connected with the bottom of the pressure-resistant reaction kettle (1) through a vertical pipe (32), a plurality of vertical pipe connecting blocks (10) are fixed at the bottom of the pressure-resistant reaction kettle (1), the top end of the vertical pipe (32) is fixedly connected with the vertical pipe connecting blocks (10), and the bottom of the vertical pipe (32) is fixedly connected with the supporting seat (8).
4. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: and a connecting pipeline between the stirrer (27) and the pressure-resistant reaction kettle is sequentially provided with a pump I (26), a flowmeter I (25), a pressure gauge I (24) and a valve I (23).
5. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: a flow meter II (29) and a valve III (28) are sequentially arranged on a connecting pipeline of the gas cylinder (31) and the stirrer (27); a connecting pipeline between the gas cylinder (31) and the pressure-resistant reaction kettle (1) is sequentially provided with a flowmeter II (29), a valve II (30), a valve I (23) and a pressure gauge I (24).
6. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: a pump II (33) and a valve V are sequentially arranged on a connecting pipeline of the water tank (36) and the stirrer (27); a connecting pipeline between the water tank (36) and the pressure-resistant reaction kettle (1) is sequentially provided with a pump II (33), a pressure gauge II (34) and a valve IV (35).
7. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: the upper end and the lower end of the support frame (13) are respectively fixedly connected with the outer wall of the end cover (11) through a support vertical pipe (14), the support vertical pipe (14) is fixedly connected with the outer wall of the end cover through a connecting block (12), and the simulation shaft (16) penetrates through a center hole of the support frame (13).
8. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: the temperature control system comprises a constant temperature box (9), and the pressure-resistant reaction kettle (1) is placed in the constant temperature box (9).
9. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: a pressure gauge III (38) and a back pressure valve (37) are sequentially arranged on a connecting pipeline of the gas-liquid-solid separator (39) and the pressure-resistant reaction kettle (1).
10. The gas hydrate reservoir horizontal well exploitation sand production simulation experiment device according to claim 1, wherein: the device also comprises a data processing system, wherein the data processing system is respectively connected with the liquid supply system, the gas supply system, the injection system, the main body reaction system and the separation and collection system and comprises a computer and a data processor.
Priority Applications (1)
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| CN113047828A (en) * | 2021-02-26 | 2021-06-29 | 青岛海洋地质研究所 | Visual simulation method for clay expansion and migration in pressure-reducing exploitation process of argillaceous powder sand mold hydrate |
| CN113092732A (en) * | 2021-05-07 | 2021-07-09 | 青岛理工大学 | Natural gas hydrate exploitation simulation and sand production and prevention experimental method |
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| CN115126481A (en) * | 2022-06-28 | 2022-09-30 | 广州海洋地质调查局 | Method and device for determining performance of sand blocking medium |
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| CN116498279A (en) * | 2023-06-27 | 2023-07-28 | 中国地质大学（北京） | Experimental system and method for simulating sand production of argillaceous silt reservoir gas reservoir |
| CN116498279B (en) * | 2023-06-27 | 2023-09-15 | 中国地质大学（北京） | Experimental system and method for simulating sand production of argillaceous silt reservoir gas reservoir |
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