阅读说明：本技术 一种水封洞库水幕系统参数优化研究装置 (Water seal cave depot water curtain system parameter optimization research device ) 是由 殷丹丹 杨森 竺柏康 朱根民 赵东锋 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种水封洞库水幕系统参数优化研究装置,属于地下水封油库储油技术领域,本装置包括：裂隙岩体,裂隙岩体放置在实验箱体内,裂隙岩体各壁面与实验箱体之间存留间隙；储油洞室,储油洞室开设在裂隙岩体内,裂隙岩体内还水平开设有水幕巷道,水幕巷道设于储油洞室上部的裂隙岩体内,水幕巷道分别设有竖直钻设的第二水幕孔和水平钻设的第一水幕孔,本发明实现了模拟地下油库水封,以及模拟地下水位、地上降雨对地下水位影响等,水幕参数精准获取以实现对水封洞库水幕系统参数优化。(The invention discloses a water curtain system parameter optimization research device of a water seal cave depot, belonging to the technical field of oil storage of an underground water seal oil depot, and the device comprises: the fractured rock mass is placed in the experiment box body, and gaps are reserved between each wall surface of the fractured rock mass and the experiment box body; the device comprises an oil storage cavern, wherein the oil storage cavern is arranged in a fractured rock body, a water curtain tunnel is further horizontally arranged in the fractured rock body and is arranged in the fractured rock body at the upper part of the oil storage cavern, and the water curtain tunnel is respectively provided with a second water curtain hole which is vertically drilled and a first water curtain hole which is horizontally drilled.)

1. The utility model provides a water seal cave storehouse water curtain system parameter optimization research device, includes:

the fractured rock mass (10) is placed in the experiment box body (60), and gaps are reserved between the wall surfaces of the fractured rock mass (10) and the experiment box body (60);

oil storage cavern (20), oil storage cavern (20) are seted up in fractured rock mass (10), water curtain tunnel (30) have still been seted up to the level in fractured rock mass (10), water curtain tunnel (30) are located in fractured rock mass (10) on oil storage cavern (20) upper portion, water curtain tunnel (30) are equipped with vertical second water curtain hole (32) of boring and the first water curtain hole (31) that the level bored and establish respectively,

the bottom in the oil storage cavern (20) is provided with a water cushion layer (42), a submersible pump (41) is arranged in the water cushion layer (42), the submersible pump (41) is connected with a pumping and drainage vertical shaft (40), the well mouth of the pumping and drainage vertical shaft (40) is arranged outside an experimental box body (60), the oil storage cavern (20) is also communicated with an oil inlet and outlet vertical shaft (50), and the well mouth of the oil inlet and outlet vertical shaft (50) is arranged outside the experimental box body (60);

-wherein, a stratum (12) is arranged on the upper part of the fractured rock body (10), a groundwater layer (11) is arranged between the stratum (12) and the fractured rock body (10), and a water spray head (74) is arranged on the upper part of the stratum (12).

2. The water seal cave depot water curtain system parameter optimization research device of claim 1, which is characterized in that: the research device is utilized to optimize water curtain parameters, and the specific method comprises the following steps:

-oil injection test, controlling the water level height of the underground water layer (11) to be constant, controlling the thickness of the water cushion layer (42) to be constant, controlling the pressure in the first water curtain hole (31) and the second water curtain hole (32) to be constant, respectively injecting oil into the oil storage cavern (20) for 8 times, wherein the oil injection height is 5 cm/time, observing whether oil seeps after each oil injection, and recording relevant parameters of the test;

-a pressurization test, wherein the water level of the underground water layer (11) is controlled to be constant, the thickness of the water cushion layer (42) is controlled to be constant, the first water curtain hole (31) and the second water curtain hole (32) are gradually pressurized for 8 times, whether oil seeps out or not is observed after each pressurization, and relevant parameters of the test are recorded;

comparing the data of the oil injection test and the pressurization test to obtain a qualitative relationship between the oil storage amount and the water curtain hole pressure.

3. The water seal cave depot water curtain system parameter optimization research device of claim 2, which is characterized in that: the oil storage cavity (20) is internally provided with a first sensing assembly (80), and the first sensing assembly (80) comprises a pressure sensor and an oil-water content distribution optical fiber sensor.

4. The water seal cave depot water curtain system parameter optimization research device as claimed in claim 2 or 3, wherein: a second sensing assembly (33) is arranged in each of the first water curtain hole (31) and the second water curtain hole (32), and each second sensing assembly (33) comprises a pressure sensor and an oil-water content distribution optical fiber sensor;

preferably, the fractured rock body (10) between the wall of the first water curtain hole (31) and the wall of the second water curtain hole (32) is provided with a fracture (34).

5. The water seal cave depot water curtain system parameter optimization research device of claim 4, which is characterized in that: the drilling deviation rate of the first water curtain holes (31) and the second water curtain holes (32) is less than 0.2%.

6. The water seal cave depot water curtain system parameter optimization research device of claim 5, which is characterized in that: oil storage cavern (20) upper end left and right sides is equipped with water curtain tunnel (30) respectively, water curtain tunnel (30) are equipped with vertical second water curtain hole (32) hole bottom level of boring and establish and are less than oil storage cavern (20) bottom surface level.

7. The water seal cave depot water curtain system parameter optimization research device of claim 6, which is characterized in that: the ground layer (12) is provided with at least two vertically arranged support frames (75), a second water conveying pipe body (73) is connected between the support frames (75), and at least two water spraying heads (74) are arranged on the second water conveying pipe body (73).

8. The water seal cave depot water curtain system parameter optimization research device of claim 7, which is characterized in that: the experimental box body (60) outside is equipped with storage water tank (70), storage water tank (70) are connected with first pump body (71) through the body, first pump body (71) are through first water delivery body (72) and second water delivery body (73) intercommunication.

9. The water seal cave depot water curtain system parameter optimization research device of claim 8, which is characterized in that: first sensing subassembly (80) and second sensing subassembly (33) are connected with the industrial computer of locating outside experiment box (60) respectively, the industrial computer is connected with the alarm.

10. The water seal cave depot water curtain system parameter optimization research device of claim 9, which is characterized in that: the method for optimizing the water curtain parameters by the research device further comprises the following steps: and (3) a rainfall test, namely controlling the water level height of the underground water layer (11) to be constant, controlling the thickness of the water cushion layer (42) to be constant, gradually raining for 8 times, observing whether oil is leaked out or not after each rainfall, and recording relevant parameters of the test.

Technical Field

The invention belongs to the technical field of oil storage of underground water-sealed oil reservoirs, and particularly relates to a water curtain system parameter optimization research device for a water-sealed cave depot.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

With the development of society in recent years, petroleum reserves play an important role in the development of national security. The underground water-sealed oil depot is a novel underground oil storage mode and has the advantages of safety, reliability, large oil storage capacity, small environmental pollution and the like. Therefore, the construction of the underground water-sealed oil storage cavern is a key implementation object of strategic oil storage in China. In the operation process of the whole underground water-sealed oil depot, the stability of oil storage of the underground oil depot can be influenced by the changes of parameters such as underground water level, water curtain hole pressure, oil pressure and water pressure and the like. Nowadays, although China has certain development in the actual construction of underground water-sealed oil depots, the changes of various parameters and the like in the operation process of the oil depots cannot be accurately monitored, and the influences of the changes of parameters such as underground water level and water curtain hole pressure on the whole oil storage cavern have more blind areas.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The invention aims to provide a water curtain system parameter optimization research device for a water seal cave depot, which is used for simulating water seal of an underground oil depot, simulating the influence of underground water level, overground rainfall on the underground water level and the like, and accurately acquiring water curtain parameters to realize the optimization of the water curtain system parameters of the water seal cave depot.

The technical scheme adopted by the invention for realizing the purpose is as follows: the utility model provides a water seal cave storehouse water curtain system parameter optimization research device, includes:

the fractured rock mass is placed in the experiment box body, and gaps are reserved between each wall surface of the fractured rock mass and the experiment box body;

the oil storage cavern is arranged in the fractured rock body, a water curtain tunnel is also horizontally arranged in the fractured rock body and is arranged in the fractured rock body at the upper part of the oil storage cavern, the water curtain tunnel is respectively provided with a second water curtain hole which is vertically drilled and a first water curtain hole which is horizontally drilled,

the oil storage chamber is also communicated with an oil inlet and outlet shaft, and the oil inlet and outlet shaft mouths are arranged outside the experimental box body;

and a stratum is arranged at the upper part of the fractured rock mass, a groundwater layer is arranged between the stratum and the fractured rock mass, and a water spraying head is arranged at the upper part of the stratum.

The invention sets the reserved gap between the fractured rock mass and the experimental box body, aims to regulate and control the external water pressure of the fractured rock mass by injecting water into the space between the fractured rock mass and the experimental box body, the method of arranging the oil storage cavern and the water curtain roadway in the fractured rock mass simulates the operation scheme of the water seal cavern in the real production, is convenient for accurately obtaining water curtain parameters, the mode of respectively arranging horizontal and vertical water curtain holes on the water curtain roadway is also a means for simulating actual operation, production and use, the design of the water cushion layer and the submersible pump is used for regulating and controlling the horizontal position height of an oil layer in the oil storage cavern, and simultaneously accurately simulating the oil storage environmental conditions, the water seal cave storage environment is completely simulated by arranging the stratum and the underground water layer, and the influence of rainfall in the region range of the water seal cave storage on the water seal cave storage is simulated by further designing a water spraying head mode.

According to one embodiment of the invention, a research device is used for optimizing water curtain parameters, and the specific method comprises the following steps:

-oil injection test, controlling the water level height of the underground water layer to be constant, controlling the thickness of the water cushion layer to be constant, controlling the pressure in the first water curtain hole and the second water curtain hole to be constant, injecting oil into the oil storage cavern for 8 times respectively, wherein the oil injection height is 5 cm/time, observing whether oil seeps out after each oil injection, and recording relevant parameters of the test;

a pressurization test, namely controlling the water level height of the underground water layer to be constant and controlling the thickness of the water cushion layer to be constant, gradually pressurizing the first water curtain hole and the second water curtain hole for 8 times, observing whether oil seeps out after each pressurization, and recording relevant parameters of the test;

comparing the data of the oil injection test and the pressurization test to obtain a qualitative relationship between the oil storage amount and the water curtain hole pressure.

The method provided by the invention obtains the influence of underground water level change on the underground water seal oil depot through a simulation test, and particularly shows the influence on the thickness of a water cushion layer and an oil layer.

According to one embodiment of the invention, a first sensing assembly is arranged in the oil storage cavity, and the first sensing assembly comprises a pressure sensor and an oil-water content distribution optical fiber sensor. The pressure sensor is used for acquiring the internal pressure change value of the oil storage cavern in the oil storage process, early warning is carried out before the early warning value is reached, and the oil-water content distribution optical fiber sensor is used for judging the internal water content of the oil storage cavern, so that the oil storage environment and the oil storage amount can be monitored conveniently.

According to one embodiment of the invention, a second sensing assembly is respectively arranged in the first water curtain hole and the second water curtain hole, and comprises a pressure sensor and an oil-water content distribution optical fiber sensor; the second sensor assembly arranged in the first water curtain hole and the second water curtain hole can monitor the water pressure in the hole body, can monitor whether oil body leakage exists or not, and can timely feed monitoring data back to the industrial personal computer for analysis and early warning.

According to one embodiment of the invention, the fractured rock mass between the walls of the first and second water curtain holes has fractures therein. And a connected crack water-carrying network is formed by utilizing the water curtain holes so as to conveniently realize the water-sealing cave depot and ensure that the water pressure is greater than the oil pressure in the oil storage cave.

According to an embodiment of the present invention, the first water curtain holes and the second water curtain holes have a hole deviation rate of less than 0.2%. The control of the deflection rate is used for avoiding and preventing the occurrence of adverse phenomena such as water leakage and the like caused by overlarge change of joints or cracks in the rock mass, particularly preventing accidents.

According to one embodiment of the invention, water curtain tunnels are respectively arranged on the left side and the right side of the upper end of the oil storage cavern, and the water curtain tunnels are provided with second water curtain holes which are vertically drilled, wherein the horizontal height of the bottom of each water curtain hole is lower than that of the bottom of the oil storage cavern, so that the water sealing effect on the bottom of the oil storage cavern is ensured.

According to one embodiment of the present invention, the ground layer has at least two vertically arranged support frames, a second water pipe is connected between the support frames, and at least two water spraying heads are arranged on the second water pipe. The sprinkler head arranged on the upper part of the stratum is used for realizing rainfall simulation so as to simulate the influence of the water level change of the underground water layer and the like on the lower water-sealed cave depot in a rainfall environment and obtain the optimized parameter value of the water-sealed cave depot in a complex environment at a higher and better level.

According to one embodiment of the invention, a water storage tank is arranged outside the experiment box body, the water storage tank is connected with a first pump body through a pipe body, and the first pump body is communicated with a second water delivery pipe body through a first water delivery pipe body and is used for supplying water to a water spraying head.

According to one embodiment of the invention, the first sensing assembly and the second sensing assembly are respectively connected with an industrial personal computer arranged outside the experimental box, and the industrial personal computer is connected with an alarm for realizing acquisition of monitoring parameters and early warning, particularly early warning at the first time after oil body leakage.

According to an embodiment of the present invention, the method for optimizing water curtain parameters by a research device further includes: and (3) a rainfall test, namely controlling the water level of the underground water layer to be constant, controlling the thickness of the water cushion layer to be constant, gradually raining for 8 times, observing whether oil is leaked out after each rainfall, and recording relevant parameters of the test. The method provided by the invention obtains the influence of the underground water level change on the underground water-sealed oil depot through a simulation test, and also comprises the influence of the underground water layer 11 after rainfall on the water-sealed cave depot.

Compared with the prior art, the invention has the beneficial effects that: the invention sets the reserved gap between the fractured rock mass and the experimental box body, aims to regulate and control the external water pressure of the fractured rock mass by injecting water into the space between the fractured rock mass and the experimental box body, the method of arranging the oil storage cavern and the water curtain roadway in the fractured rock mass simulates the operation scheme of the water seal cavern in the real production, is convenient for accurately obtaining water curtain parameters, the mode of respectively arranging horizontal and vertical water curtain holes on the water curtain roadway is also a means for simulating actual operation, production and use, the design of the water cushion layer and the submersible pump is used for regulating and controlling the horizontal position height of an oil layer in the oil storage cavern, and simultaneously accurately simulating the oil storage environmental conditions, the water seal cave storage environment is completely simulated by arranging the stratum and the underground water layer, and the influence of rainfall in the region range of the water seal cave storage on the water seal cave storage is simulated by further designing a water spraying head mode.

Drawings

FIG. 1 is a schematic view of a water curtain system parameter optimization research device for a water-sealed cave depot;

FIG. 2 is a schematic view showing a state of a water curtain system parameter optimization research device for a water-sealed cave depot, wherein the water curtain system parameter optimization research device is provided with a water spray head;

FIG. 3 is a schematic view of a first water curtain aperture and a second water curtain aperture;

fig. 4 is a schematic diagram illustrating the principle of water sealing of the oil storage chamber by the device of the present invention.

Reference numerals: 10-fractured rock mass; 11-groundwater layer; 12-the formation; 20-an oil storage chamber; 30-water curtain roadway; 31-a first water curtain hole; 32-a second water curtain hole; 33-a second sensing component; 34-crack; 40-a drainage shaft; 41-a submersible pump; 42-water cushion layer; 50-oil in and out shafts; 60-an experiment box body; 70-a water storage tank; 71-a first pump body; 72-a first water delivery tube body; 73-a second water delivery pipe body; 74-sprinkler head; 75-a support frame; 80-first sensing component.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:

example 1:

referring to the attached drawings 1-4 in the specification, the device for optimizing and researching the parameters of the water curtain system of the water seal cave depot comprises:

the fractured rock mass 10 is placed in the experiment box body 60, and gaps are reserved between the wall surfaces of the fractured rock mass 10 and the experiment box body 60;

the oil storage cavern 20 is arranged in the fractured rock mass 10, the fractured rock mass 10 is also horizontally provided with a water curtain roadway 30, the water curtain roadway 30 is arranged in the fractured rock mass 10 at the upper part of the oil storage cavern 20, the water curtain roadway 30 is respectively provided with a second water curtain hole 32 drilled vertically and a first water curtain hole 31 drilled horizontally,

wherein, the bottom in the oil storage cavern 20 is provided with a water cushion 42, the water cushion 42 is internally provided with a submersible pump 41, the submersible pump 41 is connected with a pumping and drainage vertical shaft 40, the well mouth of the pumping and drainage vertical shaft 40 is arranged outside the experimental box body 60, the oil storage cavern 20 is also communicated with an oil inlet and outlet vertical shaft 50, and the well mouth of the oil inlet and outlet vertical shaft 50 is arranged outside the experimental box body 60;

wherein, the upper part of the fractured rock body 10 is provided with a stratum 12, a groundwater layer 11 is arranged between the stratum 12 and the fractured rock body 10, and the upper part of the stratum 12 is provided with a water spray head 74.

The invention sets the gap between the fractured rock 10 and the experimental box 60, aims to regulate and control the external water pressure of the fractured rock 10 by injecting water into the space between the fractured rock 10 and the experimental box 60, the method of arranging the oil storage cavern 20 and the water curtain roadway 30 in the fractured rock mass 10 simulates the operation scheme of the water seal cavern in real production, is convenient for accurately obtaining water curtain parameters, the mode of respectively arranging horizontal and vertical water curtain holes in the water curtain roadway 30 is also a means for simulating actual operation, production and use, the water cushion 42 and the submersible pump 41 are designed to regulate the horizontal height of the oil layer in the oil storage cavern 20, meanwhile, for accurately simulating the oil storage environment condition, the water seal cave storage environment is completely simulated by arranging the stratum 12 and the underground water layer 11, and the influence of rainfall in the area range of the water seal cave storage on the water seal cave storage is further simulated by designing the water spray head 74.

The oil storage cavern 20 is internally provided with a first sensing assembly 80, and the first sensing assembly 80 comprises a pressure sensor and an oil-water content distribution optical fiber sensor. The pressure sensor is used for acquiring the pressure change value inside the oil storage cavern 20 in the oil storage process, early warning is carried out before the early warning value is reached, and the oil-water content distribution optical fiber sensor is used for judging the water content inside the oil storage cavern 20, so that the oil storage environment and the oil storage amount are conveniently monitored.

The first water curtain hole 31 and the second water curtain hole 32 are internally provided with a second sensing assembly 33 respectively, and the second sensing assembly 33 comprises a pressure sensor and an oil-water content distribution optical fiber sensor; the second sensor assembly 33 arranged in the first water curtain hole 31 and the second water curtain hole 32 can monitor the water pressure in the hole body, can monitor whether oil body leakage exists or not, and can timely feed monitoring data back to the industrial personal computer for analysis and early warning.

The fractured rock mass 10 between the walls of the first 31 and second 32 water curtain holes has a fracture 34 therein. The connected crack water-carrying network is formed by the water curtain holes so as to realize the water-sealing cave depot and ensure that the water pressure is greater than the oil pressure in the oil storage cave 20.

The first and second water curtain holes 31 and 32 have a hole deviation rate of less than 0.2%. The control of the deflection rate is used for avoiding and preventing the occurrence of adverse phenomena such as water leakage and the like caused by overlarge change of joints or cracks in the rock mass, particularly preventing accidents.

The left side and the right side of the upper end of the oil storage cavern 20 are respectively provided with a water curtain roadway 30, and the water curtain roadway 30 is provided with a second water curtain hole 32 which is vertically drilled, wherein the hole bottom horizontal height is lower than the bottom horizontal height of the oil storage cavern 20, so that the water sealing effect on the bottom of the oil storage cavern 20 is ensured.

The ground layer 12 has at least two vertically arranged support frames 75, a second water pipe 73 is connected between the support frames 75, and at least two water spraying heads 74 are arranged on the second water pipe 73. The sprinkler head 74 arranged at the upper part of the stratum 12 is used for realizing rainfall simulation so as to simulate the influence of the water level change of the groundwater layer 11 and the like on the lower water-sealed cave depot in a rainfall environment and obtain the optimized parameter values of the water-sealed cave depot in a complex environment at a higher and better level.

The water storage tank 70 is arranged outside the experimental box body 60, the water storage tank 70 is connected with a first pump body 71 through a pipe body, and the first pump body 71 is communicated with a second water delivery pipe body 73 through a first water delivery pipe body 72 and is used for supplying water to a water spraying head 74.

First sensing subassembly 80 and second sensing subassembly 33 are connected with the industrial computer of locating outside experiment box 60 respectively, and the industrial computer is connected with the alarm for the realization acquires monitoring parameter and carries out the early warning, especially carries out the early warning in the very first time after the oil body leaks.

The method for optimizing the water curtain parameters by the research device further comprises the following steps: and (3) a rainfall test, namely controlling the water level of the underground water layer 11 to be constant, controlling the thickness of the water cushion layer 42 to be constant, gradually raining for 8 times, observing whether oil is leaked out after each rainfall, and recording relevant parameters of the test. The method provided by the invention obtains the influence of the underground water level change on the underground water-sealed oil depot through a simulation test, and also comprises the influence of the underground water layer 11 after rainfall on the water-sealed cave depot.

Example 2:

the water curtain parameter optimization research device for the water curtain system of the water seal cave depot is used for optimizing water curtain parameters, and the specific method comprises the following steps:

an oil injection test, wherein the water level height of the underground water layer 11 is controlled to be constant, the thickness of the water cushion layer 42 is controlled to be constant, the pressure in the first water curtain hole 31 and the pressure in the second water curtain hole 32 are controlled to be constant, oil is injected into the oil storage cavern 20 for 8 times respectively, the oil injection height is 5 cm/time, whether oil seeps out or not is observed after oil injection is carried out each time, and relevant parameters of the test are recorded;

a pressurization test, namely controlling the water level height of the underground water layer 11 to be constant and controlling the thickness of the water cushion layer 42 to be constant, gradually pressurizing the first water curtain hole 31 and the second water curtain hole 32 for 8 times, observing whether oil seeps after each pressurization, and recording relevant parameters of the test;

a rainfall test, controlling the water level height of the underground water layer 11 to be constant, controlling the thickness of the water cushion layer 42 to be constant, gradually raining for 8 times, observing whether oil is exuded after each rainfall, and recording relevant parameters of the test;

comparing the data of the oil injection test, the pressurization test and the rainfall test to obtain the qualitative relation between the oil storage amount and the water curtain hole pressure.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.