CN111366303A - Simulation platform, experiment system and method for reservoir leakage detection experiment - Google Patents
Simulation platform, experiment system and method for reservoir leakage detection experiment Download PDFInfo
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- CN111366303A CN111366303A CN202010242448.XA CN202010242448A CN111366303A CN 111366303 A CN111366303 A CN 111366303A CN 202010242448 A CN202010242448 A CN 202010242448A CN 111366303 A CN111366303 A CN 111366303A
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- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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Abstract
The utility model relates to a simulation platform, an experimental system and a method for reservoir leakage detection experiment, which comprises a sand box, wherein the upper part of the sand box is provided with an opening to expose the inner cavity of the sand box; a soil covering layer is laid on the upper surface of the bottom wall of the sand box; a simulation dam body is arranged at one end of the sand box and supported by a covering soil layer, the side surface of the simulation dam body close to the inner cavity of the sand box is enclosed with the inner wall of the sand box to form a water storage tank, and the relative position of the simulation dam body and the sand box can be adjusted to change the size of the water storage tank; experimental water can be filled in the water storage tank to simulate water resources stored in the reservoir; and a drainage device is arranged on the bottom wall of the sand box to drain accumulated water leaked from the soil covering layer.
Description
Technical Field
The disclosure belongs to the technical field of reservoir leakage detection of hydraulic engineering, and particularly relates to a simulation platform, an experiment system and an experiment method for reservoir leakage detection experiments.
Background
At present, along with the rapid development of economy in China, the contradiction between water supply and demand is increasingly sharp, the construction of a reservoir becomes a main means for solving the problems of the contradiction between water supply and demand and the like, but is limited by construction conditions, some reservoir exploration works are not perfect before construction, and the construction technology is lagged behind, so that the leakage problem exists in different degrees after the reservoir is constructed, and the complexity and the risk of the leakage problem of the reservoir are higher, so that the leakage detection work for the leakage problem of the reservoir is indispensable.
The inventor knows that the reservoir leakage problem is a ubiquitous problem with serious harm in hydraulic engineering, but when reservoir leakage detection work is carried out, the reservoir leakage detection problem becomes a very complicated problem due to the fact that reservoir geological conditions are complex and a large area of water exists; in actual working conditions, the conventional geophysical prospecting method has great limitation and is time-consuming and labor-consuming.
In the research of the reservoir leakage detection method, corresponding experimental verification is needed, and when the actual reservoir is used as an experimental platform, variables are not convenient to control, and the experimental data are not easy to verify. In the prior art, a platform and an experimental system for reservoir leakage detection do not exist, so that research and verification of a leakage method are realized.
Disclosure of Invention
The purpose of the present disclosure is to overcome the deficiencies of the prior art, and to provide a simulation platform, an experimental system and an experimental method for reservoir leakage detection experiments; the experiment simulation platform can simulate and detect various types of reservoir leakage by using various detection modes, can detect a reservoir leakage detection method, improves the reservoir leakage detection efficiency and effect, and can save manpower and material resources.
In order to achieve the above object, a first aspect of the present disclosure provides a simulation platform for reservoir leakage detection experiments, including a sand box, an upper portion of the sand box having an opening to expose an inner cavity of the sand box; a soil covering layer is laid on the upper surface of the bottom wall of the sand box; a simulation dam body is arranged at one end of the sand box and supported by a covering soil layer, the side surface of the simulation dam body close to the inner cavity of the sand box is enclosed with the inner wall of the sand box to form a water storage tank, and the relative position of the simulation dam body and the sand box can be adjusted to change the size of the water storage tank; experimental water can be filled in the water storage tank to simulate water resources stored in the reservoir; and a drainage device is arranged on the bottom wall of the sand box to drain accumulated water leaked from the soil covering layer.
As a further technical scheme, the seepage amount, the seepage speed and the seepage position of the covering soil layer can be adjusted so as to simulate reservoirs with different seepage experiment conditions.
As a further technical scheme, an impermeable membrane is arranged in the soil covering layer.
As a further technical scheme, the drainage device can discharge seeper in the soil covering layer into the water storage tank again so as to supplement experimental water leaked and flowing out of the water storage tank.
As a further technical scheme, the tail end of the drainage device is provided with a plurality of water injection pipes, and the water injection pipes are used for injecting water discharged by the drainage device into the water storage tank again.
The second aspect of the disclosure provides a simulation experiment system for reservoir leakage detection, which comprises a surveying device and an upper computer besides the simulation platform for reservoir leakage detection experiment, wherein the surveying device can survey the geological condition in a sand box, the upper computer runs a preset detection method, and the leakage condition of experimental water in the sand box is judged according to the information of the surveying device.
A third aspect of the present disclosure provides a simulation experiment method for reservoir leakage detection, including the following steps:
filling a covering soil layer in the sand box according to the actual reservoir bottom layer condition, the seepage-proofing system and the seepage type, so that the seepage quantity, the seepage speed and the seepage position of the covering soil layer meet the set requirements, and arranging a drainage device;
adjusting the position and the angle of the simulation dam body to change the size of the water storage tank, and filling experimental water in the water storage tank;
detecting the geological condition in the sand box by using exploration equipment, and judging the leakage amount, the leakage speed and the leakage position of the experimental water in the sand box according to the detection method to be verified;
and comparing the determined leakage amount and leakage speed with the preset condition of the seepage position and the soil covering layer to verify whether the detection method is effective.
The beneficial effects of one or more technical schemes are as follows:
the sand box is adopted to simulate the actual reservoir structure, a platform for reservoir leakage detection experiments can be provided, different experimental environments can be conveniently simulated, and frequent transfer of experimenters at reservoirs in different environments is avoided; meanwhile, platforms with different experimental requirements can be conveniently arranged according to needs, and comparison between the environment condition obtained by exploration of the leakage detection method and the simulated environment arranged in the sand box in advance is facilitated, so that the effectiveness of the detection method is verified.
The mode that the seepage volume, seepage speed, the seepage position of adopting the overburden layer can be adjusted is convenient for simulate the water reservoir of different experimental conditions.
The mode that the relative position of the simulated dam body can be changed is adopted, so that the simulation of reservoirs or water areas with different areas is facilitated.
Adopt drainage device to discharge into the mode of aqua storage tank again with the ponding after the seepage, be convenient for realize the cyclic utilization of experiment water resource, can maintain water balance, carry out the water injection through a plurality of equidistant water injection pipes during the important water injection to form stable flow field.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a schematic diagram of the overall structure in an embodiment of the present disclosure;
FIG. 2 is a front view of the overall structure in an embodiment of the present disclosure;
FIG. 3 is a top view of an overall structure in an embodiment of the disclosure;
fig. 4 is a side view of the overall structure in an embodiment of the disclosure.
In the figure, 1, an electrical method instrument, 2, a soil covering layer water injection pipe, 3, a transverse deformation control rod, 4, a temperature, humidity and water content sensor assembly, 5, a sand box, 6, a cable moving, collecting and releasing rod, 7, a leakage water outlet pipe, 8, a simulation dam body, 9, a base layer, 10, an upper soil covering layer, 11, an impermeable film, 12, a water level observation pipe, 13, experimental water, 14, a rigid frame, 15, a bearing universal wheel, 16, a measuring cable, 17, a circulating water injection pipe and 18, a cable collecting and releasing line are arranged.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate description of the disclosure and simplify description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the disclosure.
As described in the background art, the problem of reservoir leakage is a ubiquitous problem with serious harm in hydraulic engineering, but when reservoir leakage detection is performed, the reservoir leakage detection problem becomes a very complicated problem due to the complex geological conditions of the reservoir and the existence of a large area of water. In actual conditions, the conventional geophysical prospecting method has great limitation and wastes time and labor, so that laboratory scale research on the problem of reservoir leakage is very important, and the traditional reservoir leakage detection method has low efficiency, low accuracy, high operation difficulty and great influence on working environment. Therefore, the simulation platform and the simulation method for the reservoir leakage detection experiment are innovated and created, are necessary requirements for improving the efficiency and the effect of the reservoir leakage detection, and are provided for solving the technical problems in the prior art.
The invention provides a simulation platform and a simulation method for reservoir seepage detection experiments, which comprises a sand box, wherein rigid frames with six universal wheels are arranged at the periphery and the bottom of the sand box, and a cushion layer is arranged at a contact position; one end of the sand box is provided with a simulation dam body, a water outlet pipe is arranged behind the dam and is used as a unique channel for leakage, and the other end of the sand box is provided with a soil covering layer water injection pipe and three equidistant circulating water injection pipes; the bottom of the sand box is a covering soil layer, and a temperature, humidity and moisture content sensor assembly and three groups of water level observation pipes are embedded; laying an anti-seepage geomembrane on the upper part of the simulated stratum, laying simulated actual membrane overlying soil above the anti-seepage geomembrane, and injecting water into the simulated reservoir water at the top; the top of the rigid frame is transversely connected with three detachable components, and the upper part of the rigid frame is provided with a vertically movable organic glass component for hanging cables and adjusting the measuring position.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a simulation platform for reservoir leak testing experiments, comprising a sand box 5, wherein the upper part of the sand box 5 is provided with an opening to expose the inner cavity of the sand box 5; a covering soil layer is laid on the upper surface of the bottom wall of the sand box 5; a simulation dam body 8 is arranged at one end of the sand box 5, the simulation dam body 8 is supported by a covering soil layer, the side face, close to the inner cavity of the sand box, of the simulation dam body 8 and the inner wall of the sand box 5 enclose to form a water storage tank, and the relative position of the simulation dam body 8 and the sand box 5 can be adjusted to change the size of the water storage tank; experimental water 13 can be filled in the water storage tank to simulate water resources stored in a reservoir; and a drainage device is arranged on the bottom wall of the sand box 5 to drain accumulated water leaked from the soil covering layer.
In this embodiment, the sand box 5 may be made of organic glass for observing the water level, and in other embodiments, the material of the sand box may be set by those skilled in the art.
In some embodiments, the bottom of the sand box is a simulated reservoir bottom stratum, and quartz sand, silt, clay and the like can be filled in the simulated reservoir bottom stratum to simulate the actual reservoir stratum.
The seepage amount, the seepage speed and the seepage position of the overburden layer can be adjusted to simulate reservoirs with different seepage experimental conditions. The drainage device can discharge seeper leaked in the soil covering layer into the water storage tank again so as to supplement experimental water leaked in the water storage tank.
And a soil covering layer water injection pipe 2 is arranged in the sand box 5, one end of the soil covering layer water injection pipe is communicated with an external water source, and the other end of the soil covering layer water injection pipe extends into the soil covering layer so as to realize water supplement of the soil covering layer.
The included angle between the simulation dam body 8 and the bottom wall of the sand box 5 can be adjusted, the simulation dam body 8 is arranged at one end of the inner cavity of the sand box 5, and the simulation dam body 8 can move and be fixed along the length direction of the inner cavity of the sand box 5.
A temperature and humidity and water content sensor assembly 4 is arranged in a soil covering layer of the sand box 5, and the temperature and humidity and water content sensor assembly 4 can transmit temperature and humidity information to an upper computer.
Specifically, the inside of the soil-covering water injection pipe 2 is of a check valve structure, only water can be injected, and water cannot be pumped, so that the uniqueness of the leakage water pipe 7 as a leakage channel is ensured, monitored data are displayed in real time according to the temperature, humidity and water content sensor assembly 4, and water can be properly injected into the soil-covering water injection pipe 22 if adjustment is needed;
in this embodiment, in order to control the deformation of the sand box 5 after being filled with the experimental water and the soil covering layer, a transverse deformation control rod 3 may be provided, and the transverse deformation control rod 3 is a long screw rod, is fixed on the rigid frame 14 by using a nut, and is detachable and remounted; the sand box 5 is embedded in a rigid frame 14, the contact part of the sand box 5 and the rigid frame 14 is provided with a rubber cushion layer, the rigid frame 14 controls the deformation of the sand box 5 after being filled with water and sand, and the sand box 5 and the rigid frame 14 are fixed on six load-bearing universal wheels 15 and can move and fix the whole system. In other embodiments, where the rigid frame 14 is capable of effectively restraining the flask 5 from deforming, the use of the lateral deformation control rods 3 may be omitted, and may be selected by those skilled in the art.
In this embodiment, the impermeable layer may be the impermeable film 11, may also be an clay layer, and may also be in other structural forms, and is set by imitating the water-proof of the actual reservoir bottom.
When the impermeable membrane 11 is adopted, the simulated reservoir (namely the storage tank) is respectively the experimental water 13, the upper soil covering layer 10, the impermeable membrane 11 and the base layer 9 from top to bottom, and the above four are adjusted according to the actual engineering conditions of the required simulated reservoir;
in this embodiment, the inner cavity or the outer wall of the sand box 5 is fixedly provided with three groups of water level observation pipes 12 in the vertical direction, and nine water level observation pipes 12 are provided for respectively observing the water levels at different positions so as to observe the change of the water level at each position of the reservoir bottom stratum after the occurrence of the seepage. The temperature and humidity and water content sensor assemblies 4 are also distributed in three groups at equal intervals and equal depths so as to monitor the temperature, the humidity and the water content of the stratum at different positions.
In other embodiments, the number and positions of the water level observation tube 12 and the temperature/humidity/water content sensor assembly 4 may be set by those skilled in the art.
The drainage device comprises a leakage water pipe 7, one end of the leakage water pipe 7 is arranged at the bottom wall of the sand box 5 to communicate the leaked accumulated water, and the other end of the leakage water pipe 7 is communicated with a water injection port of the circulating water injection pipe 17; the outside of the seepage water outlet pipe is provided with a peristaltic pump.
The circulating water injection pipe 17 has a check valve structure, only water can be injected but water cannot be discharged, and the leaked water in the leaked water pipe 7 is pumped out by a peristaltic pump and then directly injected into the circulating water injection pipe 17 so as to maintain the stability of the leaked water and the balance of the water.
The beneficial effect of this embodiment lies in: the embodiment adopts an integral movable and detachable structure, has the advantages of good controllability, simplicity in use, quickness in measurement, wide adaptability, no interference to reservoir leakage detection experiment data results and the like, can quickly detect various measurement modes, and improves the working efficiency and the effect.
When satisfying intensity, rigidity and deformation requirement, not only be convenient for observe the use, but also can guarantee the stability of system, non-deformable is damaged in the use, has improved the effect and the efficiency of indoor sand box 5 simulation experiment work.
The method ensures the exploration effect, can be repeatedly applied to various types of reservoirs or water areas with different sizes in a simulation manner, is not limited by the working conditions of various outdoor water areas, and effectively solves the problem that reservoir leakage detection is difficult to carry out or inconvenient to carry out due to the limitation of the outdoor conditions.
The system is made of high-strength non-metallic organic glass materials except the rigid frame 14, and a rubber cushion layer is added on the contact part of the rigid frame 14 and the sand box 5, so that the problems of deformation, damage, instability and the like caused by close contact are solved, and the detection result cannot be interfered.
Example 2
The embodiment provides a simulation experiment system for reservoir leakage detection, including foretell simulation platform for reservoir leakage detection experiments, still include surveying equipment and host computer, survey the geological conditions in the sand box 5, the host computer runs preset detection method, judges the leakage condition of experimental water in the sand box according to the information of surveying equipment.
In particular, the surveying assembly comprises an electrical method instrument 1, a measuring cable 16; the electrical method instrument 1 is connected with the measuring cable 16 through a cable joint, the electrical method instrument 1 is externally connected with a power supply, and the measuring cable 16 is a waterproof cable;
accordingly, the cable moving retracting and releasing rod 6 is provided at the upper portion of the flask 5, and the cable moving retracting and releasing rod 6 can suspend the measuring cable 16 to move in the flask 5, so that the measuring cable 16 can be spread over the whole flask 5. The cable take-up and pay-off rod 6 is wound with a cable take-up and pay-off wire 18.
Except for the electrical method instrument 11, the measuring cable 16, the rigid frame 14 and the transverse deformation control rod 3, other parts in the sand box 5 are high-strength non-metal materials meeting the requirements on rigidity and strength, so that the influence of metal materials on a geophysical prospecting result is avoided, and the accuracy of the geophysical prospecting result is further ensured.
Example 3
The embodiment provides an experimental method using the simulation experiment system for reservoir leakage detection, which includes the following steps:
filling a covering soil layer in the sand box 5 according to the actual reservoir bottom layer condition, the seepage-proofing system and the seepage type, so that the seepage quantity, the seepage speed and the seepage position of the covering soil layer meet the set requirements, and arranging a drainage device;
specifically, the simulated water depth is determined according to the relationship between the water depth and the simulated formation depth and the length of the cable and the distance between electrodes.
Adjusting the position and the angle of the simulation dam body 8 to change the size of the water storage tank, and filling experimental water in the water storage tank;
and pumping out the leakage water body in the leakage water outlet pipe 7 by using a peristaltic pump, injecting the leakage water body into the upper stratum stable flow water injection pipe, maintaining the stability of leakage amount and the balance of water amount, suspending the measuring cable 16 at a measuring position, keeping a straight line, and putting the conductivity recorder into water to measure the conductivity of the water body in real time. And connecting the joint of the measuring cable 16 with the electrical method instrument 1, connecting the electrical method instrument 1 with a power supply, selecting a measuring mode, and starting to measure.
Judging the leakage amount and the leakage position of the experimental water 13 in the sand box 5 according to the detection method to be verified; and comparing the determined leakage amount and leakage speed with the preset condition of the seepage position and the soil covering layer to verify whether the detection method is effective.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A simulation platform for reservoir seepage detection experiments is characterized by comprising a sand box, wherein the upper part of the sand box is provided with an opening so as to expose an inner cavity of the sand box; a soil covering layer is laid on the upper surface of the bottom wall of the sand box;
a simulation dam body is arranged at one end of the sand box, the simulation dam body is supported by the covering soil layer, the side face, close to the inner cavity of the sand box, of the simulation dam body and the inner wall of the sand box enclose to form a water storage tank, and the relative position of the simulation dam body and the sand box can be adjusted to change the size of the water storage tank;
experimental water can be filled in the water storage tank to simulate water resources stored in the reservoir; and a drainage device is arranged on the bottom wall of the sand box to drain accumulated water leaked from the soil covering layer.
2. The simulation platform for reservoir seepage detection experiments as claimed in claim 1, wherein the seepage amount, seepage speed and seepage position of the overburden layer can be adjusted to simulate reservoirs with different seepage experiment conditions.
3. The simulation platform for reservoir seepage detection as claimed in claim 1, wherein the drainage device is capable of re-draining seeped water in the overburden layer into the water storage tank to replenish the seeped experimental water in the water storage tank.
4. The simulation platform for reservoir seepage detection experiments as claimed in claim 1, wherein a water injection pipe of a covering soil layer is arranged in the sand box, one end of the water injection pipe of the covering soil layer is communicated with an external water source, and the other end of the water injection pipe of the covering soil layer extends into the covering soil layer, so that water can be supplemented to the covering soil layer.
5. The simulation platform for reservoir seepage detection experiments as claimed in claim 1, wherein the soil covering layer comprises an upper soil covering layer, an impermeable layer and a base layer which are arranged from top to bottom in sequence, the base layer is supported by the bottom wall of the sand box, and the seepage amount and the seepage position of the impermeable layer can be adjusted.
6. The simulation platform for reservoir seepage detection as claimed in claim 1, wherein the drainage device comprises a seepage outlet pipe, one end of the seepage outlet pipe is arranged at the bottom wall of the sand box to communicate seeper after seepage, and the other end of the seepage outlet pipe is communicated with the water inlet end of the water pump.
7. The simulation platform for reservoir seepage detection experiments according to claim 1, wherein the included angle between the simulation dam and the bottom wall of the sand box can be adjusted, the simulation dam is arranged at one end of the inner cavity of the sand box, and the simulation dam can move and be fixed along the length direction of the inner cavity of the sand box.
8. The simulation platform for the reservoir seepage detection experiment as claimed in claim 1, wherein a temperature and humidity and water content sensor assembly is arranged in a covering soil layer of the sand box, and the temperature and humidity and water content sensor assembly can transmit temperature and humidity information to an upper computer.
9. A simulation experiment system for reservoir seepage detection, comprising the simulation platform for reservoir seepage detection experiment of any one of claims 1 to 8,
the device comprises a sand box, and is characterized by further comprising a surveying device and an upper computer, wherein the surveying device can survey the geological condition in the sand box, the upper computer runs a preset detection method, and the leakage condition of the experimental water in the sand box is judged according to the information of the surveying device.
10. An experimental method using the simulation experiment system for detecting the leakage of the reservoir of claim 9, comprising the steps of:
filling a covering soil layer in the sand box according to the actual reservoir bottom layer condition, the seepage-proofing system and the seepage type, so that the seepage speed, the seepage amount and the seepage position of the covering soil layer meet the set requirements, and arranging a drainage device;
adjusting the position and the angle of the simulation dam body to change the size of the water storage tank, and filling experimental water in the water storage tank;
detecting the geological condition in the sand box by using exploration equipment, and judging the leakage speed, the leakage amount and the leakage position in the sand box according to the detection method to be verified;
and comparing the determined leakage speed, leakage amount and leakage position with the preset condition of the overburden layer to verify whether the detection method is effective.
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| CN114216621A (en) * | 2022-02-21 | 2022-03-22 | 成都理工大学 | Leakage detection and treatment simulation platform and simulation method |
| CN117147069A (en) * | 2023-11-01 | 2023-12-01 | 山东路新新材料有限公司 | Geomembrane leakage detection equipment |
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