CN113895852B - Atmospheric precipitation storage underground reservoir system and construction method - Google Patents

Atmospheric precipitation storage underground reservoir system and construction method Download PDF

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Publication number
CN113895852B
CN113895852B CN202111334029.XA CN202111334029A CN113895852B CN 113895852 B CN113895852 B CN 113895852B CN 202111334029 A CN202111334029 A CN 202111334029A CN 113895852 B CN113895852 B CN 113895852B
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reservoir
fracturing
boundary
water
bedrock
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CN113895852A (en
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刘涛
张国建
张旭
李小林
李飞
郭腾翔
张超然
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G5/00—Storing fluids in natural or artificial cavities or chambers in the earth
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
    • E03B3/08—Obtaining and confining water by means of wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25—Methods for stimulating production
    • E21B43/26—Methods for stimulating production by forming crevices or fractures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting

Abstract

The underground reservoir system is used for mountain areas or islands covered by complete bedrock, boundary vertical shafts are drilled between planned boundaries of the complete bedrock, directional fracturing is carried out between the boundary vertical shafts to form reservoir boundaries, rocks in the reservoir boundaries form bedrock cracks through drilling and fracturing, crack storage reservoirs are formed in the reservoir boundaries, and after the atmospheric precipitation falls onto the rock surface, the cracks infiltrate into the reservoirs to store underground water, so that the underground water cannot be lost and wasted from the rock surface any more, and the stored underground water is taken out through a water taking well; in addition, by building a surface water gathering and collecting channel, the precipitation is guided to the fracturing well to enter a crack reservoir, so that the water storage efficiency is improved; the underground reservoir system solves the problem that the underground water is difficult to store in the relevant area, 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 extra building materials in the construction process, and is suitable for comprehensive popularization in the relevant area.

Description

Atmospheric precipitation storage underground reservoir system and construction method
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.
Background
In mountain areas where the ground surface is exposed and the complete bedrock lacks groundwater, particularly islands formed by the complete bedrock, rainwater cannot penetrate due to complete and compact formation lithology, and the rainwater is difficult to store.
For islands formed by complete bedrock, the area is small, the extremely lack of fresh water resources is one of main constraint factors of island development, the fresh water source of the islands is mainly transported by rainfall and ships at present or is obtained by a sea water desalting device, the transportation of the ships is limited by the limitation of transportation capacity and the influence of climate, the sea water desalting device consumes large energy, and rainwater is always wasted when being collected and cannot be stored and flows into the sea. The island is in the ocean, and is generally more energetic, and the collected rainwater is stored as the optimal choice, of course, we can build a dyke to form a reservoir on the island, but the topography condition is difficult to find on the island, cannot be widely used, and the island far from the continent is difficult to find the material for building the dyke, so the construction 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: the utility model provides an atmospheric precipitation storage underground reservoir system, includes the complete bedrock that covers some regions in mountain area or island, and the upper surface of complete bedrock forms the reservoir boundary through setting up a plurality of boundary shafts, and the lower extreme of this reservoir boundary is close to the bottom of complete bedrock, and the rock in the reservoir boundary is by fracturing forming crack reservoir, and the middle part of crack reservoir is equipped with the water intake well.
Preferably, a plurality of boundary shafts on the reservoir boundary are arranged along the designed boundary.
Preferably, the complete bedrock and the surrounding surface are built with diversion of precipitation to the fracturing well and infiltration
And collecting channels for collecting water in the fracture reservoir.
Preferably, 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 network.
Preferably, the gap of the bedrock fracture in the fracture reservoir gradually becomes smaller from bottom to top.
The construction method of the atmospheric precipitation storage underground reservoir system comprises the following steps:
s1, mapping the shape and the occupied area of the complete bedrock, and planning the volume of a storage reservoir;
s2, drilling a plurality of boundary vertical shafts on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage warehouse by using a drilling tool according to the planning, controlling the vertical drilling depth within the complete bedrock to avoid perforating the complete bedrock, and then carrying out directional fracturing among the boundary vertical shafts to enable the planned boundary to vertically form a crack interface as a reservoir boundary;
s3, drilling a plurality of fracturing shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing shafts are uniformly arranged on the rock surface, and the drilling depth of the fracturing shafts is the same as that of the boundary shaft;
s4, placing the fracturing tool into the fracturing vertical shaft, and gradually fracturing from bottom to top, wherein the pressure of the pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing vertical shaft is completely fractured;
s5, carrying out fracturing on a plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock cracks formed by the fracturing vertical shafts can only extend to vertical crack interfaces formed between reservoir boundary vertical shafts, and the fractured rocks in the reservoir boundary form a crack storage reservoir;
s6, building a water collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and penetrating the precipitation into the fracture reservoir;
s7, selecting a proper fracturing vertical well down-hole well entering pipe and a water filtering pipe in the fracture reservoir, and reforming the fracturing vertical well into a water taking well.
Preferably, the fracturing tool adopts a pressure pump for clean water fracturing, and the drilling tool adopts a hydrodrill.
The beneficial technical effects of the invention are as follows:
the underground reservoir system is used for mountain areas or islands covered by complete bedrock, boundary vertical shafts are drilled between planned boundaries of the complete bedrock, directional fracturing is carried out between the boundary vertical shafts to form reservoir boundaries, rocks in the reservoir boundaries form bedrock cracks through drilling and fracturing, crack storage reservoirs are formed in the reservoir boundaries, and after atmospheric precipitation falls on the rock surfaces, the cracks between the cracks infiltrate into the reservoirs to store underground water, so that the underground water cannot be lost and wasted from the rock surfaces any more, and the stored underground water is taken out for people to use through water taking wells; in addition, by building a surface water gathering and collecting channel, the precipitation is guided to the fracturing well and is infused into the seepage crack water storage reservoir, so that the water storage efficiency is improved;
the gap of the bedrock crack in the underground reservoir system gradually becomes smaller from bottom to top, the crack at the upper part of the reservoir is very small, the overall structure is slightly high and is closer to a flat ground, the water storage capacity is small, the gap at the lower part of the reservoir is larger, the gap is similar to a broken stone group, more underground water can be stored, therefore, the evaporation capacity of the crack reservoir is very small, the water stored in the reservoir is not easy to run off and is close to natural underground water, the evaporation capacity of the crack reservoir is relatively small compared with that of the natural reservoir, and the ground resource on the surface of the reservoir can be utilized.
The underground reservoir system solves the problem that the mountain area or the island covered by the complete bedrock is difficult to store underground water, solves the water use problem of people in the area, does not influence the normal production and life of people above the reservoir, does not need extra building materials in the construction process, saves the material cost, and is suitable for being comprehensively popularized in related areas.
Drawings
FIG. 1 is a schematic top view of the present invention after drilling reservoir boundaries on a complete bedrock and rock drilling within the reservoir boundaries;
FIG. 2 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic top view of the reservoir of the present invention after formation of a fissured reservoir from rocks within the reservoir boundaries;
fig. 4 is a B-B cross-sectional view of fig. 3.
Fig. 5 is a schematic view of the well of fig. 4 after being placed in a well pipe.
In the figure, 11. Complete bedrock, 12. Fracture interface, 121. Boundary shaft, 13. Fracture reservoir, 14. Water intake well, 141. Well pipe, 142. Drainage pipe, 16. Fracturing shaft, 17. Fracturing tool.
Detailed Description
Referring to fig. 1-5 of the specification, an atmospheric precipitation storage underground reservoir system comprises a complete bedrock covering a certain area or island of a mountain area, wherein the upper surface of the complete bedrock forms a reservoir boundary by arranging a plurality of boundary vertical shafts, 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 crack storage reservoir, and a water intake well is arranged in the middle of the crack storage reservoir. The water intake 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 reservoir is pumped out for surrounding 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 used for blocking rainwater which is not permeated from the surface of the water storage reservoir in time and flows out outwards, and the water storage efficiency is improved.
The water collecting channel is used for guiding the precipitation to the fracturing well and penetrating into the fractured reservoir, the precipitation on the surface of the periphery of the crushed stone reservoir is guided to the fracturing well and penetrates into the fractured reservoir through the water collecting channel, the fractures on the upper part of the crushed stone reservoir are smaller, and the fracturing well can be stored on the surface in a relatively complete mode.
The gap of the bedrock crack in the crack storage reservoir gradually becomes smaller from bottom to top, and the whole structure is slightly high and is closer to a flat ground, so that the normal activities of people on the surface are not influenced.
In a second embodiment, referring to fig. 1 to 5 of the specification, a method for constructing an underground reservoir system for storing atmospheric precipitation is characterized by: the method comprises the following steps:
s1, mapping the shape and the occupied area of the complete bedrock, and planning the volume of a storage reservoir;
s2, drilling a plurality of boundary vertical shafts on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage by using a drilling tool according to the plan, controlling the vertical drilling depth within the complete bedrock body, avoiding perforating the complete bedrock body, then carrying out directional fracturing among the boundary vertical shafts, optionally carrying out directional hydraulic fracturing, cutting gaps among the boundary cutting vertical shafts through high-pressure water to form a boundary of a reservoir, and enabling the planned boundary to vertically form a crack interface as the boundary of the reservoir;
s3, drilling a plurality of fracturing shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing shafts are uniformly arranged on the rock surface, and the drilling depth of the fracturing shafts is the same as that of the boundary shaft;
s4, placing the fracturing tool into the fracturing vertical shaft, and gradually fracturing from bottom to top, wherein the pressure of the pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing vertical shaft is completely fractured;
s5, carrying out fracturing on a plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock cracks formed by the fracturing vertical shafts can only extend to vertical crack interfaces formed between reservoir boundary vertical shafts, and the fractured rocks in the reservoir boundary form a crack storage reservoir;
s6, building a water collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and penetrating the precipitation into the fracture reservoir;
s7, selecting a proper fracturing vertical well down-hole well entering pipe and a proper fracturing vertical well filtering pipe in the fractured reservoir, reforming the fracturing vertical well entering pipe and the proper fracturing vertical well entering pipe into a water taking well, and enabling water stored in the lower portion of the reservoir to enter the water taking well from the filtering pipe.
The fracturing tool adopts a pressure pump for clean water fracturing, and the drilling tool adopts a hydrodrill.

Claims (5)

1. An atmospheric precipitation storage underground reservoir system, includes the complete bedrock that covers some regions in mountain area or island, characterized by: the upper surface of the complete bedrock forms a reservoir boundary by arranging a plurality of boundary vertical shafts, 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 crack reservoir, and a water intake well is arranged in the middle of the crack reservoir; the gap of the bedrock crack in the crack storage reservoir gradually becomes smaller from bottom to top; and a plurality of boundary vertical shafts on the reservoir boundary are arranged along the designed boundary.
2. An atmospheric precipitation storage underground reservoir system according to claim 1, wherein: and a water collecting channel for guiding the precipitation to the fracturing well and penetrating into the fractured reservoir is formed on the surface of the complete bedrock and the periphery.
3. An 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 network.
4. The construction method of the atmospheric precipitation storage underground reservoir system is characterized by comprising the following steps of:
s1, mapping the shape and the occupied area of the complete bedrock, and planning the volume of a storage reservoir;
s2, drilling a plurality of boundary vertical shafts on the upper surface of the complete bedrock along the horizontal boundary of the planned water storage warehouse by using a drilling tool according to the planning, controlling the vertical drilling depth within the complete bedrock to avoid perforating the complete bedrock, and then carrying out directional fracturing among the boundary vertical shafts to enable the planned boundary to vertically form a crack interface as a reservoir boundary;
s3, drilling a plurality of fracturing shafts downwards on the rock surface in the boundary of the reservoir by using a drilling tool, wherein the plurality of fracturing shafts are uniformly arranged on the rock surface, and the drilling depth of the fracturing shafts is the same as that of the boundary shaft;
s4, placing the fracturing tool into the fracturing vertical shaft, and gradually fracturing from bottom to top, wherein the pressure of the pressure pump of the fracturing tool is gradually reduced in the upward fracturing process until the fracturing section of the fracturing vertical shaft is completely fractured;
s5, carrying out fracturing on a plurality of fracturing vertical shafts one by one according to the step S4, wherein bedrock cracks formed by the fracturing vertical shafts can only extend to vertical crack interfaces formed between reservoir boundary vertical shafts, and the fractured rocks in the reservoir boundary form a crack storage reservoir;
s6, building a water collecting channel on the ground surface of the fracture reservoir, guiding precipitation to the fracturing vertical shaft and penetrating the precipitation into the fracture reservoir;
s7, selecting a proper fracturing vertical well down-hole well entering pipe and a water filtering pipe in the fracture reservoir, and reforming the fracturing vertical well into a water taking well.
5. The method for constructing an atmospheric precipitation storage underground reservoir system according to claim 4, wherein: the fracturing tool adopts a pressure pump for clean water fracturing, and the drilling tool adopts a hydrodrill.
CN202111334029.XA 2021-11-11 2021-11-11 Atmospheric precipitation storage underground reservoir system and construction method Active CN113895852B (en)

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