A groundwater level regulating method for a groundwater-sealed storage

Abstract

The groundwater level regulation method of the groundwater sealed cave warehouse comprises the following steps: the water curtain system is divided into zones, a to-be-tested water curtain zone is preliminarily screened out from the water curtain system through conductivity analysis, a to-be-tested water level monitoring hole changes with the water pressure adjustment of the to-be-tested associated water curtain hole zone, a first water curtain hole zone with strong connectivity with the to-be-tested water level monitoring hole is further screened out, and finally all the underground water level monitoring holes are matched with corresponding first water curtain hole zones. When the underground water level of a certain area in the warehouse area abnormally decreases, the water pressure of the first water curtain hole zone corresponding to the abnormal water level monitoring hole is adjusted, so that the water level of the abnormal water level monitoring hole significantly rises, thereby realizing accurate regulation of the underground water level of the area. The embodiment can significantly improve the regulation accuracy and efficiency of the underground water level of the abnormal area, maintain a stable designed underground water level with the most economical means, and avoid resource waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground water-sealed caverns, and particularly to a method for regulating underground water level of an underground water-sealed cavern. BACKGROUND

[0002] The core function of an underground water-sealed cavern is to store chemical products such as crude oil. The main principle is to build an underground artificial water curtain system above the oil storage cavern, inject water into the rock mass of the storage area to form a water curtain, and use the principle that water and oil are incompatible to ensure that oil / gas cannot be volatilized and leaked.

[0003] The oil storage cavern is excavated in a fissured rock mass and is in an underground water environment. Due to the excavation of such a large underground rock mass, a large amount of underground water seeps into or rushes into the oil storage cavern, causing the natural underground water level around the excavation area of the cavern to drop. When the underground water level of the storage area is lower than the elevation of the oil storage cavern, there is a risk of oil and gas leakage. Based on this, the excavated oil storage cavern not only needs to meet the necessary volume for oil storage, but also needs to maintain a stable design underground water level through the water curtain system to ensure the safety of oil storage, which poses a major challenge to the regulation of the underground water level of the water curtain system.

[0004] However, in practice, when the underground water level at a certain place in the storage area abnormally drops, the existing method for regulating the underground water level generally increases the water supply pressure of the entire water curtain system to regulate the overall underground water level, which cannot independently and accurately regulate the underground water level at that place. This undoubtedly causes resource waste and poor regulation effect. SUMMARY

[0005] The main purpose of the present application is to provide a method for regulating the underground water level of an underground water-sealed cavern to solve the technical problem of resource waste and poor regulation effect of the existing method for regulating the underground water level.

[0006] To achieve the above purpose, the present application provides a method for regulating the underground water level of an underground water-sealed cavern, comprising the following steps:

[0007] S1, obtaining current status operation data of a water curtain system of a storage area, dividing the water curtain system into regions according to the current status operation data of the water curtain system, and obtaining a plurality of water curtain hole regions;

[0008] S2, obtaining data of an underground water level monitoring hole and geological structure data, and determining whether there is a structural connection relationship between the underground water level monitoring hole and the water curtain hole region according to the geological structure data and the data of the underground water level monitoring hole;

[0009] S3, when the water level monitoring hole to be measured and the water curtain hole area have a structural conductive relationship, taking the water curtain hole area having the structural conductive relationship as the water curtain hole area to be measured; wherein, the ith underground water level monitoring hole is selected as the water level monitoring hole to be measured, i≥1, i is a positive integer;

[0010] S4, obtaining the initial water pressure of the water curtain hole area to be measured and the initial water level of the water level monitoring hole to be measured, adjusting the water pressure of the water curtain hole area to be measured, and then obtaining the water level change per megapascal of the water level monitoring hole to be measured with the water pressure change of the water curtain hole area to be measured;

[0011] S5, determining whether the water level change per megapascal is within a first preset range; if yes, determining that the connectivity between the water curtain hole area to be measured and the water level monitoring hole to be measured is strong, and determining the water curtain hole area to be measured having a strong connectivity with the water level monitoring hole to be measured as the first water curtain hole area;

[0012] S6, assigning i+1 to i, and repeating steps S3 to S5, so that each underground water level monitoring hole has a first water curtain hole area with strong connectivity;

[0013] S7, obtaining the real-time water level value of the underground water level monitoring hole, and determining whether the real-time water level value is lower than a preset threshold; if yes, determining that the underground water level monitoring hole is an abnormal water level monitoring hole;

[0014] S8, obtaining the first water curtain hole area corresponding to the abnormal water level monitoring hole, adjusting the water pressure of the first water curtain hole area to make the water level of the abnormal water level monitoring hole return to a preset stable water level, and realizing the adjustment of the underground water level.

[0015] Further, the step S8 specifically comprises the following steps:

[0016] Obtaining the first water curtain hole area corresponding to the abnormal water level monitoring hole, determining whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, synchronously adjusting the water pressure of multiple first water curtain hole areas to make the water level of the abnormal water level monitoring hole return to a preset stable water level, and realizing the adjustment of the underground water level; wherein, the water pressure change values of the multiple first water curtain hole areas are equal.

[0017] Further preferably, the synchronous adjustment of the water pressure of multiple first water curtain hole areas specifically comprises the following steps:

[0018] Simultaneously and to the same extent, the water pressure of multiple first water curtain hole areas is increased, and when the pressure of the jth first water curtain hole area in the multiple first water curtain hole areas reaches the maximum value of the preset water pressure interval, the increase of the water pressure of the jth first water curtain hole area is stopped, and the pressure of the remaining first water curtain hole areas is continuously increased, wherein j≥1.

[0019] Further, the step S8 specifically comprises the following steps:

[0020] acquiring a first water curtain hole area corresponding to the abnormal water level monitoring hole, judging whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, increasing the water pressure of the kth first water curtain hole area, judging whether the water pressure of the kth first water curtain hole area reaches the maximum value of the preset water pressure interval, if yes, increasing the water pressure of the k+1th first water curtain hole area, so that the water level of the abnormal water level monitoring hole rises to the preset stable water level, realizing the regulation of the underground water level; wherein k≥1.

[0021] Further, in the step S5, the following steps are specifically included:

[0022] S51, judging whether the water level change per megapascal is located in the first preset range, the second preset range or the third preset range;

[0023] S52, if the water level change per megapascal is located in the first preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is strong, and the to-be-tested associated water curtain hole area having a strong connectivity relationship with the to-be-tested water level monitoring hole is determined as the first water curtain hole area;

[0024] S53, if the water level change per megapascal is located in the second preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is general, and the to-be-tested associated water curtain hole area having a general connectivity relationship with the to-be-tested water level monitoring hole is determined as the second water curtain hole area;

[0025] S54, if the water level change per megapascal is located in the third preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is weak, and the to-be-tested associated water curtain hole area having a weak connectivity relationship with the to-be-tested water level monitoring hole is determined as the third water curtain hole area.

[0026] Further, the following steps are further included:

[0027] S01, acquiring data of an oil storage cavern, and setting multiple monitoring hole simulation points at equal intervals according to an axis of the oil storage cavern; wherein the arrangement direction of the multiple monitoring hole simulation points is along the axis perpendicular to the axis of the oil storage cavern and away from the oil storage cavern;

[0028] S02, gradually increasing the water pressure of the water curtain system in the preset water pressure interval, and acquiring the water level increment of the monitoring hole simulation point in the increasing process of the water pressure of the water curtain system;

[0029] S03, obtaining the corresponding relationship between the water level of the monitoring hole simulation point and the water pressure of the water curtain system in the preset water pressure interval according to the water pressure of the water curtain system and the water level increment.

[0030] Further, after the step S6, further comprising the following steps:

[0031] S61, obtaining valve data of the water curtain holes in the verification water curtain hole area, and classifying the valves of the water curtain holes according to the valve data, the valves including a first type of valve and a second type of valve; wherein the verification water curtain hole area is a first water curtain hole area currently being verified;

[0032] S62, controlling all the valves to be closed, and obtaining first water level verification data of the verification hole; wherein the verification hole is a groundwater level monitoring hole corresponding to the verification water curtain hole area;

[0033] S63a, controlling the first type of valve to be opened, and controlling the water pressure of the verification water curtain hole area to increase to the maximum water pressure of the preset water pressure interval, and obtaining second water level verification data of the verification hole;

[0034] S64a, obtaining a first difference value between the second water level verification data and the first water level verification data, and determining whether the first difference value is within a first preset range; if yes, determining that the connectivity between the water curtain hole connected with the first type of valve and the verification hole is qualified.

[0035] Further preferably, further comprising the following steps:

[0036] S63b, controlling the second type of valve to be opened, and controlling the water pressure of the verification water curtain hole area to increase to the maximum water pressure of the preset water pressure interval, and obtaining third water level verification data of the verification hole;

[0037] S64b, obtaining a second difference value between the third water level verification data and the first water level verification data, and determining whether the second difference value is within the first preset range; if yes, determining that the connectivity between the water curtain hole connected with the second type of valve and the verification hole is qualified.

[0038] Further, further comprising the following steps:

[0039] S8, when the water level of the abnormal water level monitoring hole rises to a preset stable water level, determining whether the water pressure of the first water curtain hole area is within the preset water pressure interval; if yes, completing the groundwater level regulation of the abnormal water level monitoring hole;

[0040] S9, if no, regulating the water pressure of the first water curtain hole area to decrease, and when the water pressure of the first water curtain hole is equal to the maximum water pressure of the preset water pressure interval, regulating the water pressure of the second water curtain hole area to make the water level of the abnormal water level monitoring hole rise to the preset stable water level;

[0041] S10, judging whether the water pressure of the second water curtain hole area is located in the preset water pressure interval, if yes, the underground water level regulation of the abnormal water level monitoring hole is completed;

[0042] S11, if no, the water pressure of the second water curtain hole area is regulated to decrease, and when the water pressure of the second water curtain hole is equal to the maximum water pressure of the preset water pressure interval, the water pressure of the third water curtain hole area is regulated to make the water level of the abnormal water level monitoring hole rise to the preset stable water level.

[0043] Further, the underground water level monitoring hole is divided into two types, including a peripheral underground water level monitoring hole and an underground water level monitoring hole at the top of an oil storage cavern, the peripheral underground water level monitoring hole is located at the periphery of the oil storage cavern, and the depth of the peripheral underground water level monitoring hole is 10 m below the elevation of the bottom surface of the oil storage cavern from the ground, and the depth of the underground water level monitoring hole at the top of the oil storage cavern is above the top of the oil storage cavern from the ground.

[0044] Compared with the prior art, the present application has the following beneficial effects:

[0045] In the process of underground engineering excavation, when the water level of the underground water level monitoring hole in a certain area of the reservoir area decreases to below the preset threshold value, only the water pressure of the first water curtain hole area corresponding to the abnormal water level monitoring hole needs to be adjusted, so that the water level of the abnormal water level monitoring hole can be significantly raised, thereby realizing the regulation of the underground water level in this area. It can be seen that the present application can significantly improve the regulation accuracy and efficiency of the abnormal area underground water level, and avoid the phenomenon of resource waste; on the other hand, the water pressure of the first water curtain hole area corresponding to the abnormal water level monitoring hole is high, and the water pressure of the water curtain system in the remaining area is low, which can significantly prolong the service life of the water curtain system. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative labor.

[0047] Figure 1 It is a flowchart of the underground water level regulation method in an embodiment of the present application;

[0048] Figure 2 It is a plane schematic diagram of the water curtain system area division in an embodiment of the present application;

[0049] Figure 3 It is a monitoring hole simulation point arrangement schematic diagram of the oil storage cavern seepage simulation test in an embodiment of the present application;

[0050] Figure 4 For Figure 3 Figure 4 is a graph showing the relationship between water curtain hole pressure and monitoring hole simulation point water level in the No. 0, No. 5 and No. 10 monitoring holes of the oil storage cavern.

[0051] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0052] Explanation of reference signs:

[0053] 1, underground water level monitoring hole; 2, oil storage cavern; 3, connecting tunnel; 4, water curtain hole; 5, fissure; 6, monitoring hole simulation point. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein merely exemplify the present application and are not intended to limit the present application.

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as described in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0057] In addition, the description of “first”, “second” and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0058] The underground water-sealed cavern includes an oil storage chamber 2, a groundwater level monitoring hole 1, a connecting tunnel 3, a water curtain system and a fissure 5. The oil storage chamber 2 is used for storing oil or natural gas. The connecting tunnel 3 connects the oil storage chamber 2. The water curtain system is composed of multiple water curtain holes 4 and is located above the oil storage chamber 2. The water curtain system is supplied with water from the fissure 5 to supplement the groundwater level, thereby maintaining the water-sealed airtightness of the oil storage chamber 2. The groundwater level monitoring hole 1 monitors the groundwater level at all times to prevent accidents caused by oil leakage due to the decrease of the groundwater level.

[0059] Please refer to Figures 1 to 4 The embodiment provides an underground water level regulation method of an underground water-sealed cavern.

[0060] S1, current operation data of a water curtain system of a current reservoir area is acquired, the water curtain system is regionally divided according to the current operation data of the water curtain system, and multiple water curtain hole regions are obtained. The current operation data of the water curtain system is data such as the distribution and average water pressure of an existing water curtain system. In the embodiment, the average water pressure in the same water curtain hole region is the same.

[0061] S2, data of a groundwater level monitoring hole 1 and geological structure data are acquired, and whether the groundwater level monitoring hole 1 and a water curtain hole region have a structure conduction relationship is determined according to the geological structure data and the data of the groundwater level monitoring hole 1. The geological structure data is geological occurrence data.

[0062] S3, when the to-be-tested groundwater level monitoring hole and the water curtain hole region have a structure conduction relationship, the water curtain hole region having the structure conduction relationship is taken as a to-be-tested associated water curtain hole region. The i th groundwater level monitoring hole 1 is selected as the to-be-tested groundwater level monitoring hole, i≥1, and i is a positive integer.

[0063] S4, initial water pressure of the to-be-tested associated water curtain hole region and an initial water level of the to-be-tested groundwater level monitoring hole are acquired, the water pressure of the to-be-tested associated water curtain hole region is adjusted, and the water level change amount of the to-be-tested groundwater level monitoring hole with the water pressure change of the to-be-tested associated water curtain hole region per megapascal is acquired.

[0064] S5, whether the water level change amount per megapascal is in a first preset range is determined. If yes, it is determined that the connectivity between the to-be-tested associated water curtain hole region and the to-be-tested groundwater level monitoring hole is strong, and the to-be-tested associated water curtain hole region having a strong connectivity relationship with the to-be-tested groundwater level monitoring hole is determined as a first water curtain hole region.

[0065] S6, the i+1 th groundwater level monitoring hole 1 is selected as the to-be-tested groundwater level monitoring hole, and steps S3 to S5 are repeated, so that each groundwater level monitoring hole 1 has a first water curtain hole region having a strong connectivity relationship.

[0066] S7, acquiring a real-time water level value of the underground water level monitoring hole 1, judging whether the real-time water level value is lower than a preset threshold value, if yes, determining that the underground water level monitoring hole 1 is an abnormal water level monitoring hole;

[0067] S8, acquiring a first water curtain hole area corresponding to the abnormal water level monitoring hole, adjusting the water pressure of the first water curtain hole area to make the water level of the abnormal water level monitoring hole rise to a preset stable water level, and realizing the adjustment of the underground water level.

[0068] In the embodiment, the water curtain system is divided into zones, and the water curtain zones to be tested are preliminarily screened out from the water curtain system through the geological structure data and the conduction analysis of the water level monitoring holes to be tested. The water level monitoring holes to be tested will change with the water pressure adjustment of the water curtain hole zones to be tested. The connectivity is judged according to the comparison between the water level change amount per megapascal and the first preset range, so as to further screen out the first water curtain hole zones with strong connectivity with the water level monitoring holes to be tested. Finally, all the underground water level monitoring holes 1 are matched with corresponding first water curtain hole zones. In the process of underground engineering excavation, when the underground water level of a certain area in the current reservoir area abnormally decreases, the real-time water level value of the underground water level monitoring hole 1 in the area decreases to below the preset threshold value. Only the water pressure of the first water curtain hole area corresponding to the abnormal water level monitoring hole needs to be adjusted, so that the water level of the abnormal water level monitoring hole rises, thereby realizing the adjustment of the underground water level of the area. The embodiment can significantly improve the adjustment accuracy and efficiency of the underground water level of the abnormal area, maintain the stable design underground water level with the most economical means, and avoid resource waste. On the other hand, the water pressure of the first water curtain hole area corresponding to the abnormal water level monitoring hole is high, and the water pressure of the water curtain system in the remaining area is low, which can significantly prolong the service life of the water curtain system.

[0069] The embodiment can timely find the abnormality and leakage of the water curtain system. Once the water curtain system leaks or has an abnormality, the abnormality will be quickly transmitted to the underground water level monitoring hole 1, so that the monitoring personnel can timely find the problem. In this way, measures can be taken as soon as possible to repair and handle the problem, avoid the problem from being enlarged, and ensure the safety and stability of the underground water-sealed cave reservoir.

[0070] The embodiment can provide a basis for safety evaluation of the underground water-sealed cave reservoir. The stable water level data of the underground water level monitoring hole 1 indicates that the water curtain system and the surrounding underground water environment are in a relatively stable state, and the water sealing condition of the underground water-sealed cave reservoir is reliable, thereby providing strong data support for the safety evaluation of the underground water-sealed cave reservoir.

[0071] In the embodiment, further, the plurality of first water curtain hole areas are synchronously adjusted, and the step S8 specifically includes the following steps.

[0072] acquire the first water curtain hole area corresponding to the abnormal water level monitoring hole, and determine whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, the water pressure of multiple first water curtain hole areas is synchronously regulated to make the water level of the abnormal water level monitoring hole return to a preset stable water level, so as to realize the regulation of the underground water level; wherein the water pressure change values of multiple first water curtain hole areas are equal.

[0073] More preferably, the synchronous regulation of the water pressure of multiple first water curtain hole areas specifically includes the following steps:

[0074] The water pressure of multiple first water curtain hole areas is increased at the same time and to the same extent, and when the pressure of the jth first water curtain hole area in multiple first water curtain hole areas reaches the maximum value of the preset water pressure interval, the increase of the water pressure of the jth first water curtain hole area is stopped, and the pressure of the remaining first water curtain hole areas continues to increase, wherein j≥1.

[0075] In another embodiment, multiple first water curtain hole areas are regulated step by step, and the step S8 specifically includes the following steps:

[0076] The first water curtain hole area corresponding to the abnormal water level monitoring hole is acquired, and it is determined whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, the water pressure of the kth first water curtain hole area is regulated to increase, it is determined whether the water pressure of the kth first water curtain hole area reaches the maximum value of the preset water pressure interval, if yes, the water pressure of the k+1th first water curtain hole area is regulated to increase, so that the water level of the abnormal water level monitoring hole returns to a preset stable water level, and the regulation of the underground water level is realized; wherein k≥1.

[0077] In one embodiment, in the step S5, the following steps are specifically included:

[0078] S51, it is determined whether the water level change per megapascal is located in a first preset range, a second preset range or a third preset range;

[0079] S52, if the water level change per megapascal is located in the first preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is strong, and the to-be-tested associated water curtain hole area having a strong connectivity relationship with the to-be-tested water level monitoring hole is determined as a first water curtain hole area;

[0080] S53, if the water level change per megapascal is located in the second preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is general, and the to-be-tested associated water curtain hole area having a general connectivity relationship with the to-be-tested water level monitoring hole is determined as a second water curtain hole area;

[0081] S54, if the water level change per megapascal is within a third preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole area and the to-be-tested water level monitoring hole is weak, and the to-be-tested associated water curtain hole area having weak connectivity with the to-be-tested water level monitoring hole is determined as a third water curtain hole area.

[0082] In this embodiment, the numerical unit of water pressure is converted into the numerical unit of the water depth of the underground water level monitoring hole 1, the first water curtain hole area is area A, the first preset range is A≥52m / MPa; the second water curtain hole area is area B, the second preset range is 30m / MPa<B<52m / MPa; and the third water curtain hole area is area C, and the third preset range is C≤30m / MPa.

[0083] In this embodiment, the first preset range, the second preset range and the third preset range divide the multiple to-be-tested associated water curtain hole areas having conductivity with the to-be-tested water level monitoring hole into three levels according to the strength of the connectivity, so as to facilitate targeted hierarchical control of the water curtain system in the process of underground water level regulation. When the regulation of the first water curtain hole area cannot meet the demand of underground water level regulation, the regulation of the second water curtain hole area and the third water curtain hole area can be used to supplement the demand of underground water level regulation, thereby further improving the accuracy of the underground water level regulation method.

[0084] This embodiment is helpful for optimizing the design of the water curtain system. Through the analysis of the strength of the connectivity between the water curtain system and the underground water level monitoring hole 1, the interaction relationship between the water curtain system and the surrounding underground water environment can be understood. This can provide a basis for the optimized design of the water curtain system, such as determining more reasonable water curtain hole arrangement, water injection pressure and other parameters, and improving the efficiency and reliability of the water curtain system.

[0085] In one embodiment, as shown in FIG. 2, the method further includes carrying out a seepage simulation test on the oil storage cavern 2 to explore the connectivity between the underground water level monitoring hole 1 and the water curtain system at different positions, and includes the following steps: Figures 3 to 4

[0086] S01, obtaining data of the oil storage cavern 2, and setting multiple monitoring hole simulation points at equal intervals according to the axis of the oil storage cavern 2; wherein the arrangement direction of the multiple monitoring hole simulation points is along the axis perpendicular to the axis of the oil storage cavern 2 and away from the oil storage cavern 2;

[0087] S02, obtaining a preset water pressure interval of the water curtain system, gradually increasing the water pressure of the water curtain system in the preset water pressure interval, and obtaining the water level increment of the monitoring hole simulation point in the process of increasing the water pressure of the water curtain system;

[0088] ​S03, obtaining the corresponding relationship between the water level of the monitoring hole simulation point and the water pressure of the water curtain system in the preset water pressure interval according to the water pressure of the water curtain system and the water level increment.

[0089] In this embodiment, the preset water pressure interval is 0-0.8 MPa, and the normal water supply pressure is 0.3 MPa. The monitoring hole simulation points 0-14 are arranged along the axis perpendicular to the oil storage cavern 2, and the monitoring hole simulation points are uniformly arranged in the direction away from the oil storage cavern 2. The position of the monitoring hole simulation point 0 is directly above the top of the oil storage cavern 2, and the position of the monitoring hole simulation point 10 is above the fracture. The water pressure of the water curtain system is gradually increased from 0 to 0.8 MPa for testing:

[0090] The monitoring hole simulation point 1: the water level is 380.11 when the water pressure is 0.8 MPa; the average water pressure increases by 0.1 MPa, and the water level rises by 3.83 m. During the process of water pressure from 0 to 0.8 MPa, the water level increases by 30.61 m in total.

[0091] The monitoring hole simulation point 6: the water level is 391.38 when the water pressure is 0.8 MPa; the average water pressure increases by 0.1 MPa, and the water level rises by 5.22 m; during the process of water pressure from 0 to 0.8 MPa, the water level increases by 41.77 m in total.

[0092] The monitoring hole simulation point 10: the water level is 402.14 when the water pressure is 0.8 MPa; the average water pressure increases by 0.1 MPa, and the water level rises by 6.49 m; during the process of water pressure from 0 to 0.8 MPa, the water level increases by 51.95 m in total.

[0093] The remaining specific test results are shown in the following table. The test data is summarized as follows Figure 4 It can be seen that the corresponding relationship between the water level of the monitoring hole simulation point and the water pressure of the water curtain system in the interval of 0-0.8 MPa is a linear relationship.

[0094]

[0095] In one embodiment, it further includes a verification process for the first water curtain hole area, that is, after S6, the following steps are further included:

[0096] S61, obtaining the valve data of the water curtain hole 4 of the verification water curtain hole area, and classifying the valves according to the valve data, the valves including the first type of valve and the second type of valve; wherein the verification water curtain hole area is the first water curtain hole area currently being verified;

[0097] In one embodiment, the valves are classified according to the order of the valves in the water curtain hole valve data, and the valves include odd valves and even valves.

[0098] S62, control the valve to be fully closed to obtain first water level calibration data of the calibration hole; wherein the calibration hole is a groundwater level monitoring hole 1 corresponding to the calibration water curtain hole area;

[0099] S63a, control the first type valve to be opened, and control the water pressure of the calibration water curtain hole area to increase to the maximum water pressure of the preset water pressure interval to obtain second water level calibration data of the calibration hole;

[0100] S64a, obtain a first difference value between the second water level calibration data and the first water level calibration data, and determine whether the first difference value is within a first preset range; if yes, it is determined that the water curtain hole 4 connected with the first type valve is qualified in terms of the connectivity with the calibration hole.

[0101] Or;

[0102] S63b, control the second type valve to be opened, and control the water pressure of the calibration water curtain hole area to increase to the maximum water pressure of the preset water pressure interval to obtain third water level calibration data of the calibration hole;

[0103] S64b, obtain a second difference value between the third water level calibration data and the first water level calibration data, and determine whether the second difference value is within the first preset range; if yes, it is determined that the water curtain hole 4 connected with the second type valve is qualified in terms of the connectivity with the calibration hole.

[0104] The first difference value and the second difference value in the embodiment are both determined after being converted into water level change values per megapascal, and when it is determined that the connectivity is unqualified, a technician needs to troubleshoot and dredge the corresponding valve.

[0105] In the above embodiment, as a further preferred, a process of step-by-step regulation of the groundwater level of the abnormal water level monitoring hole is further included, thereby expanding the fault tolerance of the application under the premise of saving resources and reducing losses, and specifically including the following steps:

[0106] S8, when the water level of the abnormal water level monitoring hole rises to a preset stable water level, it is determined whether the water pressure of the first water curtain hole area is within the preset water pressure interval, and if yes, the regulation of the groundwater level of the abnormal water level monitoring hole is completed;

[0107] S9, if not, the water pressure of the first water curtain hole area is regulated to decrease, and when the water pressure of the first water curtain hole area is equal to the maximum water pressure of the preset water pressure interval, the water pressure of the second water curtain hole area is regulated to make the water level of the abnormal water level monitoring hole rise to the preset stable water level;

[0108] S10, it is determined whether the water pressure of the second water curtain hole area is within the preset water pressure interval, and if yes, the regulation of the groundwater level of the abnormal water level monitoring hole is completed;

[0109] S11, if no, the water pressure of the second water curtain hole area is regulated to decrease, and when the water pressure of the second water curtain hole area is equal to the maximum water pressure of the preset water pressure interval, the water pressure of the third water curtain hole area is regulated to make the water level of the abnormal water level monitoring hole rise to the preset stable water level.

[0110] In some cases, if the water pressure of the third water curtain hole area reaches the maximum water pressure of the preset water pressure interval, and the water level of the abnormal water level monitoring hole has not reached the preset stable water level, the pressure of the first water curtain hole area, the second water curtain hole area and the third water curtain hole area is increased synchronously to share the water pressure distribution.

[0111] Further, the underground water level monitoring hole 1 is divided into two types, including a peripheral underground water level monitoring hole and an underground water level monitoring hole at the top of the oil storage cavern, the peripheral underground water level monitoring hole is located at the periphery of the oil storage cavern 2, and the depth of the peripheral underground water level monitoring hole is 10 m from the ground to the elevation below the bottom surface of the oil storage cavern 2, and the depth of the underground water level monitoring hole at the top of the oil storage cavern is from the ground to above the top of the oil storage cavern 2.

[0112] Further, it also includes a water quality monitoring hole, and the depth of the water quality monitoring hole is 10 m from the ground to the elevation below the bottom surface of the oil storage cavern 2.

[0113] It is worth mentioning that the present application is applied in a certain underground water-sealed cavern project, which is the largest underground water-sealed cavern project under construction in China at present. The rock mass in the reservoir area is mainly Hercynian monzogranite, and is interspersed with granite porphyry and diorite porphyrite. The rock mass is relatively broken, the water-conducting structure is developed, the average permeability coefficient of the rock mass is 2.04E-3 m / d, and the permeability of the rock mass in the local area can reach 1~10 Lu.

[0114] As shown in Figure 2 Fig. 1, 32 water level monitoring holes are arranged in the reservoir area and the periphery, of which OA-1~OA-14 are peripheral underground water level monitoring holes, i.e. the holes in magenta in the figure, drilled from the ground to 10 m below the bottom surface elevation of the oil storage cavern 2; OB-1~OB-10 are underground water level monitoring holes at the top of the oil storage cavern 2, i.e. the holes in green in the figure, drilled from the ground to 12 m above the preset stable water level; OC-1~OC-7 are water quality monitoring holes, i.e. the holes in blue in the figure, drilled from the ground to 10 m below the bottom surface elevation of the oil storage cavern 2, and the preset stable water level of the present application is 370 m.

[0115] The successful application of the application solves the technical problem that part of the underground water level in the reservoir area is still lower than the preset stable water level due to the excavation of underground engineering and under the action of the water curtain system. The application improves the underground water level in the supply channel to maintain the stability of the underground water level at a very small economic cost, ensures the functional realization of the underground water sealing cave reservoir, provides a basis for the evaluation of the water curtain system water supply effect in the operation period, and has great significance for improving the engineering construction quality and promoting the development of the industry.

[0116] The above are only preferred embodiments of the application, and do not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A method for regulating the groundwater level of a groundwater-sealed storage cavern, characterized by, The method comprises the following steps: S1, obtaining current running data of a water curtain system in a warehouse area, performing regional division on the water curtain system according to the running data, and obtaining a plurality of water curtain hole regions; S2, obtaining data of a groundwater level monitoring hole and geological structure data, and determining whether the groundwater level monitoring hole and the water curtain hole region have a structure conduction relationship according to the geological structure data and the data of the groundwater level monitoring hole; S3, when the to-be-tested groundwater level monitoring hole and the water curtain hole region have a structure conduction relationship, taking the water curtain hole region having the structure conduction relationship as a to-be-tested associated water curtain hole region; wherein, the i-th groundwater level monitoring hole is taken as the to-be-tested groundwater level monitoring hole, i≥1, and i is a positive integer; S4, obtaining an initial water pressure of the to-be-tested associated water curtain hole region and an initial water level of the to-be-tested groundwater level monitoring hole, adjusting the water pressure of the to-be-tested associated water curtain hole region, and then obtaining a water level change per megapascal of the to-be-tested groundwater level monitoring hole with the change of the water pressure of the to-be-tested associated water curtain hole region; S5, determining whether the water level change per megapascal is within a first preset range; if yes, determining that the connectivity between the to-be-tested associated water curtain hole region and the to-be-tested groundwater level monitoring hole is strong, and determining the to-be-tested associated water curtain hole region having a strong connectivity relationship with the to-be-tested groundwater level monitoring hole as a first water curtain hole region; S6, assigning i+1 to i, and repeating steps S3 to S5, so that each groundwater level monitoring hole has a first water curtain hole region having a strong connectivity relationship; S7, obtaining a real-time water level value of the groundwater level monitoring hole, and determining whether the real-time water level value is lower than a preset threshold; if yes, determining that the groundwater level monitoring hole is an abnormal water level monitoring hole; S8, obtaining a first water curtain hole region corresponding to the abnormal water level monitoring hole, adjusting the water pressure of the first water curtain hole region to make the water level of the abnormal water level monitoring hole return to a preset stable water level, and realizing the adjustment of the groundwater level; The step S5 specifically comprises the following steps: S51, determining whether the water level change per megapascal is within a first preset range, a second preset range or a third preset range; S52, if the water level change per megapascal is within the first preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole region and the to-be-tested groundwater level monitoring hole is strong, and the to-be-tested associated water curtain hole region having a strong connectivity relationship with the to-be-tested groundwater level monitoring hole is determined as a first water curtain hole region; S53, if the water level change per megapascal is within the second preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole region and the to-be-tested groundwater level monitoring hole is general, and the to-be-tested associated water curtain hole region having a general connectivity relationship with the to-be-tested groundwater level monitoring hole is determined as a second water curtain hole region; S54, if the water level change per megapascal is within the third preset range, it is determined that the connectivity between the to-be-tested associated water curtain hole region and the to-be-tested groundwater level monitoring hole is weak, and the to-be-tested associated water curtain hole region having a weak connectivity relationship with the to-be-tested groundwater level monitoring hole is determined as a third water curtain hole region.

2. The groundwater level regulating method according to claim 1, characterized by, The step S8 specifically comprises the following steps: The first water curtain hole area corresponding to the abnormal water level monitoring hole is obtained, and it is judged whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, the water pressure of multiple first water curtain hole areas is synchronously regulated to make the water level of the abnormal water level monitoring hole rise to a preset stable water level, so as to realize the regulation of the underground water level; wherein the water pressure change values of multiple first water curtain hole areas are equal.

3. The groundwater level regulating method according to claim 2, characterized by, The synchronous regulation of the water pressure of multiple first water curtain hole areas specifically includes the following steps: The water pressure of multiple first water curtain hole areas is increased simultaneously and to the same extent, and it is judged whether the pressure of the jth first water curtain hole area in multiple first water curtain hole areas reaches the maximum value of the preset water pressure interval, then the increase of the water pressure of the jth first water curtain hole area is stopped, and the pressure of the remaining first water curtain hole areas continues to increase, wherein j≥1.

4. The groundwater level regulating method according to claim 1, characterized by, The step S8 specifically includes the following steps: The first water curtain hole area corresponding to the abnormal water level monitoring hole is obtained, and it is judged whether the first water curtain hole area corresponding to the abnormal water level monitoring hole has multiple; if yes, the water pressure of the kth first water curtain hole area is regulated to increase, it is judged whether the water pressure of the kth first water curtain hole area reaches the maximum value of the preset water pressure interval, if yes, the water pressure of the k+1th first water curtain hole area is regulated to increase, so as to make the water level of the abnormal water level monitoring hole rise to a preset stable water level, and realize the regulation of the underground water level; wherein k≥1.

5. The groundwater level regulating method according to claim 1, characterized by, Further comprising the following steps: S01, obtaining data of an oil storage cavern, and setting multiple monitoring hole simulation points at equal intervals along an axis of the oil storage cavern; wherein the arrangement direction of the multiple monitoring hole simulation points is along the axis perpendicular to the oil storage cavern and away from the oil storage cavern; S02, gradually increasing the water pressure of the water curtain system in a preset water pressure interval, and obtaining the water level increment of the monitoring hole simulation point in the increasing process of the water pressure of the water curtain system; S03, obtaining the corresponding relationship between the water level of the monitoring hole simulation point and the water pressure of the water curtain system in the preset water pressure interval according to the water pressure of the water curtain system and the water level increment.

6. The groundwater level regulation method according to claim 5, characterized in that, After the step S6, further comprising the following steps: S61, obtaining valve data of the water curtain hole in the verification water curtain hole area, and classifying the valves of the water curtain hole according to the valve data, the valves including first type valves and second type valves; wherein the verification water curtain hole area is the first water curtain hole area currently being verified; S62, controlling all the valves to be closed, and obtaining first water level verification data of the verification hole; wherein the verification hole is an underground water level monitoring hole corresponding to the verification water curtain hole area; S63a, controlling the first type valves to be opened, and controlling the water pressure of the verification water curtain hole area to increase to the maximum water pressure of the preset water pressure interval, and obtaining second water level verification data of the verification hole; S64a, obtaining a first difference value of the second water level verification data and the first water level verification data, and judging whether the first difference value is within a first preset range; if yes, it is determined that the connectivity of the water curtain hole connected with the first type valves and the verification hole is qualified.

7. The groundwater level regulation method according to claim 6, characterized in that, Further comprising the following steps: S63b, control the second type of valve to open, and control the water pressure of the verification water curtain hole area to increase to the maximum water pressure of the preset water pressure interval, to obtain third water level verification data of the verification hole; S64b, obtain the second difference value of the third water level verification data and the first water level verification data, and determine whether the second difference value is within the first preset range; if yes, it is determined that the connectivity of the water curtain hole connected with the second type of valve and the verification hole is qualified.

8. The groundwater level regulation method according to claim 7, characterized in that, Further comprising the following steps: S8, when the water level of the abnormal water level monitoring hole rises to the preset stable water level, determine whether the water pressure of the first water curtain hole area is within the preset water pressure interval; if yes, the underground water level regulation of the abnormal water level monitoring hole is completed; S9, if not, control the water pressure of the first water curtain hole area to decrease, and when the water pressure of the first water curtain hole is equal to the maximum water pressure of the preset water pressure interval, control the water pressure of the second water curtain hole area to make the water level of the abnormal water level monitoring hole rise to the preset stable water level; S10, determine whether the water pressure of the second water curtain hole area is within the preset water pressure interval; if yes, the underground water level regulation of the abnormal water level monitoring hole is completed; S11, if not, control the water pressure of the second water curtain hole area to decrease, and when the water pressure of the second water curtain hole is equal to the maximum water pressure of the preset water pressure interval, control the water pressure of the third water curtain hole area to make the water level of the abnormal water level monitoring hole rise to the preset stable water level.

9. The groundwater level regulation method according to claim 1, characterized by, The underground water level monitoring hole is divided into two types, including peripheral underground water level monitoring hole and oil storage cavern top underground water level monitoring hole, the peripheral underground water level monitoring hole is located in the periphery of the oil storage cavern, the depth of the peripheral underground water level monitoring hole is 10m from the ground to the elevation below the bottom surface of the oil storage cavern, and the depth of the oil storage cavern top underground water level monitoring hole is from the ground to above the top of the oil storage cavern.

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