阅读说明：本技术 大气降水存储地下水库系统及建造方法 (Atmospheric precipitation storage underground reservoir system and construction method ) 是由 刘涛 张国建 张旭 李小林 李飞 郭腾翔 张超然 于 2021-11-11 设计创作，主要内容包括：一种大气降水存储地下水库系统,该地下水库系统用于被完整基岩覆盖的山区或海岛,通过在完整基岩的规划边界之间钻出边界竖井,并在边界竖井之间进行定向压裂形成水库边界,水库边界内的岩石通过钻井和压裂形成基岩裂隙,在水库边界内形成裂隙储水库,大气降水落到岩石表面后裂隙渗入水库内存储形成地下水,不会再从岩石表面流失浪费掉,通过取水井将储存的地下水取出；另外,通过修建地表拢水收集渠,将降水导流至压裂井进入裂隙储水库,提高储水效率；该地下水库系统解决了相关地区难以存储地下水的问题,解决了该地区人们的用水难题,不影响人们在水库上方正常的生产生活,施工过程不需要额外的建筑材料,适合在相关区域全面推广。(An underground reservoir system for storing atmospheric precipitation is used in mountainous areas or islands covered by complete bedrocks, boundary vertical wells are drilled between planned boundaries of the complete bedrocks, directional fracturing is carried out between the boundary vertical wells to form reservoir boundaries, rocks in the reservoir boundaries form bedrock fractures through drilling and fracturing, fracture reservoir reservoirs are formed in the reservoir boundaries, the fractures penetrate into the reservoir after the atmospheric precipitation falls on the rock surfaces to form underground water, the underground water cannot be lost and wasted from the rock surfaces, and the stored underground water is taken out through a water taking well; in addition, a ground surface water collecting and collecting channel is built, precipitation is guided to a fracturing well and enters a fracture reservoir, and the water storage efficiency is improved; the underground reservoir system solves the problem that the related area is difficult to store underground water, solves the water using problem of people in the area, does not influence normal production and life of people above the reservoir, does not need additional building materials in the construction process, and is suitable for being comprehensively popularized in the related area.)

1. An atmospheric precipitation storage underground reservoir system comprises a complete bedrock covering a certain area of a mountain area or an island, and is characterized in that: the upper surface of the complete bedrock forms a reservoir boundary by arranging a plurality of boundary vertical wells, the lower end of the reservoir boundary is close to the bottom of the complete bedrock, rocks in the reservoir boundary are fractured to form a fracture reservoir, and the middle of the fracture reservoir is provided with a water taking well.

2. The atmospheric precipitation storage underground reservoir system according to claim 1, wherein: and a plurality of boundary vertical shafts on the boundary of the reservoir are arranged along the designed boundary.

3. The atmospheric precipitation storage underground reservoir system according to claim 1, wherein: the complete bedrock and the surrounding earth surface are provided with a water diversion channel for guiding precipitation to the fracturing well and permeating into the fracturing well

A water collecting channel of the crack reservoir.

4. The atmospheric precipitation storage underground reservoir system according to claim 1, wherein: the water taking well is internally provided with a water pump and a pump pipe, and the pump pipe is connected with a water supply pipe network.

5. The atmospheric precipitation storage underground reservoir system according to claim 1, wherein: and gaps of bed rock fractures in the fracture water storage reservoir gradually decrease from bottom to top.

6. The method of constructing an atmospheric precipitation storage underground reservoir system according to any one of claims 1 to 5, characterized by: the method comprises the following steps:

s1, mapping the shape and the floor area of the complete bedrock, and planning the volume of the reservoir;

s2, drilling a plurality of boundary vertical wells on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage reservoir by using a drilling tool according to the plan, controlling the vertical drilling depth within the complete bedrock body to avoid drilling through the complete bedrock body, and then performing directional fracturing among the boundary vertical wells to enable the planned boundary to vertically form a fracture interface as the reservoir boundary;

s3, drilling a plurality of fracturing vertical shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing vertical shafts are uniformly distributed on the rock surface, and the drilling depth of the fracturing vertical shafts is the same as that of the boundary vertical shafts;

s4, placing the fracturing tool into the fracturing shaft, and gradually fracturing from bottom to top, wherein the pressure of a pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing shaft is completely fractured;

s5, fracturing the plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock fractures formed by the fracturing vertical shafts can only extend to vertical fracture interfaces formed between the reservoir boundary vertical shafts, and fractured rocks in the reservoir boundary form a fracture reservoir;

s6, building a water gathering collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and infiltrating the precipitation into the fracture reservoir;

s7, selecting a proper fracturing vertical shaft in the fracture reservoir, and putting a well pipe and a strainer into the fracture reservoir to transform the fracture reservoir into a water taking well.

7. The method of constructing an atmospheric precipitation storage underground reservoir system according to claim 6, characterized by: the fracturing tool is fractured by clean water of a pressure pump, and the drilling tool is a hydrographic drilling machine.

Technical Field

The invention relates to the technical field of underground water storage, in particular to an atmospheric precipitation storage underground reservoir system and a construction method thereof.

Background

In mountainous areas where complete bedrock is exposed on the surface and the underground water is lacked, particularly islands formed by the complete bedrock, the rainwater cannot permeate due to the fact that the lithology of the stratum is complete and compact, and the rainwater is difficult to store.

For the island formed by complete bedrock, the area is small, and the extreme shortage of fresh water resources is one of the main restriction factors for island development, at present, the fresh water source of the island is mainly transported by rainfall and ships or obtained by a seawater desalination device, the transportation of the ships is limited in scale due to the limitation of transportation capacity and the influence of weather, the energy consumption of the seawater desalination device is large, and the rainwater collection is usually wasted because the rainwater cannot be stored and flows into the sea in vain. The sea island is in the sea, the rain is abundant generally, the rainwater collection and storage are the optimal choice, certainly, a dam can be built on the sea island to form a reservoir, but the terrain condition is difficult to find on the sea island and cannot be generally used, the dam building material is difficult to find on the sea island far away from the continental land, and the building cost is very high.

Disclosure of Invention

In order to solve the problems, the invention provides an atmospheric precipitation storage underground reservoir system and a construction method.

The technical scheme of the invention is as follows: an underground reservoir system for storing atmospheric precipitation comprises a complete bedrock covering a certain area of a mountain area or a sea island, wherein the upper surface of the complete bedrock forms a reservoir boundary by arranging a plurality of boundary vertical wells, the lower end of the reservoir boundary is close to the bottom of the complete bedrock, rocks in the reservoir boundary are fractured to form a fracture reservoir, and a water taking well is arranged in the middle of the fracture reservoir.

Preferably, a plurality of boundary shafts on the boundary of the reservoir are arranged along the designed boundary.

Preferably, the entire bedrock and surrounding surface are constructed to divert precipitation to the fracturing well and penetrate

A water collecting channel of the crack reservoir.

Preferably, a water pump and a pump pipe are arranged in the water taking well, and the pump pipe is connected with a water supply pipe network.

Preferably, gaps of bed rock fractures in the fracture water storage reservoir gradually decrease from bottom to top.

A method for building an underground reservoir system for storing atmospheric precipitation comprises the following steps:

s1, mapping the shape and the floor area of the complete bedrock, and planning the volume of the reservoir;

s2, drilling a plurality of boundary vertical wells on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage reservoir by using a drilling tool according to the plan, controlling the vertical drilling depth within the complete bedrock body to avoid drilling through the complete bedrock body, and then performing directional fracturing among the boundary vertical wells to enable the planned boundary to vertically form a fracture interface as the reservoir boundary;

s3, drilling a plurality of fracturing vertical shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing vertical shafts are uniformly distributed on the rock surface, and the drilling depth of the fracturing vertical shafts is the same as that of the boundary vertical shafts;

s4, placing the fracturing tool into the fracturing shaft, and gradually fracturing from bottom to top, wherein the pressure of a pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing shaft is completely fractured;

s5, fracturing the plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock fractures formed by the fracturing vertical shafts can only extend to vertical fracture interfaces formed between the reservoir boundary vertical shafts, and fractured rocks in the reservoir boundary form a fracture reservoir;

s6, building a water gathering collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and infiltrating the precipitation into the fracture reservoir;

s7, selecting a proper fracturing vertical shaft in the fracture reservoir, and putting a well pipe and a strainer into the fracture reservoir to transform the fracture reservoir into a water taking well.

Preferably, the fracturing tool is fractured by clean water of a pressure pump, and the drilling tool is a hydrographic drilling machine.

The beneficial technical effects of the invention are as follows:

the underground reservoir system is used for mountainous areas or islands covered by complete bedrocks, boundary vertical wells are drilled among planned boundaries of the complete bedrocks, directional fracturing is carried out among the boundary vertical wells to form reservoir boundaries, rocks in the reservoir boundaries form bedrock fractures through drilling and fracturing, fracture reservoir reservoirs are formed in the reservoir boundaries, atmospheric precipitation falls on the surfaces of the rocks and then permeates into the reservoirs from gaps among the fractures to form underground water, the underground water cannot be lost and wasted from the surfaces of the rocks, and the stored underground water is taken out through a water taking well and is used by people; in addition, a ground surface water collecting and collecting channel is built, precipitation is guided to the fracturing well and is merged into a seepage fracture reservoir, and the water storage efficiency is improved;

the clearance of bed rock crack is from upwards diminishing gradually down in this underground reservoir system, the crack on water storage reservoir upper portion is very little, the slight height of overall structure and more nearly smooth ground, the water storage capacity is little, the clearance of water storage reservoir lower part is great, be similar to the rubble crowd, can store more groundwater, consequently the evaporation capacity of this kind of crack water storage reservoir is very little, the difficult loss of water of storing in the reservoir, be close natural groundwater, the evaporation capacity of this kind of crack water storage reservoir nature reservoir is little relatively, and can utilize the land resource on reservoir earth's surface.

The underground reservoir system solves the problem that the mountainous area or the island covered by the complete bedrock is difficult to store underground water, solves the water using problem of people in the area, does not influence the normal production and life of people above the reservoir, does not need additional building materials in the construction process, saves the material cost, and is suitable for being comprehensively popularized in relevant areas.

Drawings

FIG. 1 is a schematic top view of the present invention after drilling a reservoir boundary over the completed bedrock and drilling rock within the reservoir boundary;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic diagram of a top view of a fractured reservoir formed from rocks within a boundary of the reservoir according to the present invention;

fig. 4 is a sectional view taken along line B-B of fig. 3.

Figure 5 is a schematic view of the well casing of figure 4 after it has been placed in the well.

In the figure, 11 is complete bedrock, 12 is a fracture interface, 121 is a boundary vertical shaft, 13 is a fracture reservoir, 14 is a water extraction well, 141 is a well pipe, 142 is a filter pipe, 16 is a fracturing vertical shaft, and 17 is a fracturing tool.

Detailed Description

In the first embodiment, referring to the attached figures 1-5 of the specification, an atmospheric precipitation storage underground reservoir system comprises a complete bedrock covering a certain area of a mountain area or island, the upper surface of the complete bedrock forms a reservoir boundary by arranging a plurality of boundary vertical wells, the lower end of the reservoir boundary is close to the bottom of the complete bedrock, rocks in the reservoir boundary are fractured to form a fractured reservoir, and the middle of the fractured reservoir is provided with a water taking well. The water taking well is internally provided with a water pump and a pump pipe, the pump pipe is connected with a water supply pipe network, water stored in the crack water storage reservoir is pumped out for peripheral residents to use, one side of the reservoir is provided with a water purifying device, and if the water in the reservoir does not reach the drinking standard, the water is purified by the water purifying device and then is drunk by the residents.

The plurality of boundary vertical shafts on the reservoir boundary are arranged along the designed boundary, a circle of water retaining enclosing wall can be arranged on the outer side of the reservoir boundary, and the water retaining enclosing wall is used for blocking rainwater which does not permeate from the surface of the water storage tank in time and flows out, so that the water storage efficiency is improved.

And a water gathering collecting channel which guides precipitation to the fracturing well and permeates into the fracture water storage reservoir is built on the complete bedrock and the peripheral surface, the precipitation on the peripheral surface of the gravel water storage reservoir is guided to the fracturing well through the water gathering collecting channel and is merged into the fracture water storage reservoir, the fracture on the upper part of the gravel water storage reservoir is small, and the fracturing well can be stored on the surface relatively.

The gaps of bed rock fractures in the fracture water storage reservoir gradually decrease from bottom to top, the overall structure is slightly high and is closer to a flat ground, and normal activities of people on the surface are not influenced.

In the second embodiment, referring to the attached fig. 1-5 of the specification, the method for constructing the underground water reservoir system for storing the atmospheric precipitation is characterized in that: the method comprises the following steps:

s1, mapping the shape and the floor area of the complete bedrock, and planning the volume of the reservoir;

s2, drilling a plurality of boundary vertical wells on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage reservoir by using a drilling tool according to the plan, controlling the vertical drilling depth within the complete bedrock body to avoid drilling through the complete bedrock body, then performing directional fracturing among the boundary vertical wells, optionally performing directional hydraulic fracturing, cutting gaps among the boundary fracture vertical wells through high-pressure water cutting to form the boundary of the reservoir, and enabling the planned boundary to vertically form a fracture interface to serve as the boundary of the reservoir;

s3, drilling a plurality of fracturing vertical shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing vertical shafts are uniformly distributed on the rock surface, and the drilling depth of the fracturing vertical shafts is the same as that of the boundary vertical shafts;

s4, placing the fracturing tool into the fracturing shaft, and gradually fracturing from bottom to top, wherein the pressure of a pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing shaft is completely fractured;

s5, fracturing the plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock fractures formed by the fracturing vertical shafts can only extend to vertical fracture interfaces formed between the reservoir boundary vertical shafts, and fractured rocks in the reservoir boundary form a fracture reservoir;

s6, building a water gathering collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and infiltrating the precipitation into the fracture reservoir;

s7, selecting a proper fracturing vertical shaft in the fracture reservoir, descending a well pipe and a strainer, and transforming the fracturing vertical shaft into a water taking well, wherein the stored water at the lower part of the reservoir enters the water taking well from the strainer.

The fracturing tool is fractured by clean water of a pressure pump, and the drilling tool is a hydrographic drilling machine.