PREREQUISITES FOR THE CONSTRUCTION OF A CLOSED SYSTEM OF OPENING AND DEVELOPMENT OF GROUNDWATER DEPOSITS
Mendebaev T. Smashov N.
2022National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#6Issue 456118 - 130 pp.
Population growth and economic development have dramatically increased the demand for fresh water. The result of these trends is high rates of groundwater depletion around the world. The traditional practice of opening and developing groundwater with vertical wells is morally obsolete, since the drilling is mainly on waste rocks with a small area of opening aquifers by the value of their thickness. It is necessary to revise the methods of opening and developing aquifers from the perspective of protecting the bowels of the earth and the groundwater system, with a focus on increasing water recovery in relation to the physical scope of drilling wells. A closed system has been formed, structurally consisting of downward injection and ascending water-lifting wells, connected by multi-level intermediate shafts drawn along the strike of aquifers. The system is based on the calculation of water intake from manifolds by the ejection effect, implemented by pumping water through a downhole well and lifting an increased volume of water through an upward well. The geological and technical prerequisites for the construction of a closed system, the sequence and scope of the work performed, measures to preserve the reservoir properties of aquifers, requirements for the method of drilling wells and intermediate wellbores without complications are outlined. Developed and tested in practice-the layout for kickoff and the formation of intermediate wellbores, a core set equipped with a multi-chamber downhole hydraulic machine and a rock cutting tool with a hydrodynamic effect of rock destruction. The characteristics and results of testing are given.
aquifers , closed system , Drilling , filterless , layout , well , wellbores
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