Method for increasing brine output from brine mining well in salt lake mining area

Abstract

A method for increasing the brine output from a brine mining well in a salt lake mining area includes the following steps that 1, vertical deep well is built, wherein the designed depth of the vertical deep well is determined according to the occurrence conditions of the brine-containing ore deposit, and the shaft bottom needs to be located 5-8 cm away from a bottom plate of the brine-containing ore deposit at the lowermost portion in mining; 2, a directional horizontal well is built, wherein mining of a confined brine strata proceeds from top to bottom, horizontal sections are constructed along a bottom plate of the pressure-bearing brine-containing ore deposit I after the directional well traverses the overlying strata, and the directional well is communicated with the vertical deep well; 3, replacement mining is performed, wherein when the brine output of the upper portion of the pressure-bearing brine-containing ore deposit I is reduced and cna not reach the production scale requirement, the stable inclined section of the directional well continues to deepen downward, the horizontal sections are constructed along a bottom plate of the pressure-bearing brine-containing ore deposit II so that the directional well is communicated with the vertical deep well. According to the steps, the lower portion of the pressure-bearing brine-containing ore deposit continues to be mined. The method can increase the brine output area of the deep confined brine strata, improves the brine output of the vertical deep well, has remarkable economic benefits, and makes full use of the salt lake brine resources.

Description

Technical field [0001] The invention relates to a method for extracting brine in a salt lake mining area, in particular to a method for increasing the amount of brine produced by a brine mining well in a salt lake mining area. Background technique [0002] The brine deposits in the salt lake mining area are generally divided into submerged brine deposits and confined brine deposits according to the occurrence characteristics of aquifers. Among them, the submerged brine deposits are shallow, the permeability coefficient is large, and the water content is good, and the pressurized brine deposits are large and the permeability coefficient is small. , Poor water richness, because the thickness of the pressure-bearing brine layer is much larger than that of the submerged brine layer, its porosity and water supply are generally greater than the upper submerged brine layer. At present, the main mining objects in most salt lake mining areas in China are shallow submerged brine deposits. ...

AI Technical Summary

Problems solved by technology

For deep confined brine (the buried depth of the brine surface is more than 30 meters), at present, vertical deep wells and deep well pumps are generally used to extract brine. Small, when the above method is used, the amount of brine produced by a single well is relatively low. In order to meet the same production scale requirements, more brine production wells are required, and the production cost is higher

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