OIL AND GAS, SHALE AND COAL DEPOSIT DEVELOPMENT METHOD Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mining industry and can be used for deposit development. The concept of the invention is as follows: by method through wells drilled at deposits, different working fluids at different pump-in pressures are injected into beds, solid electrodes are placed in them and supplied with alternate current, and electric arcs are turned on between solid electrodes of two neighbouring wells, provided that oil beds have natural layers with electroconductive properties. A fluid with electroconductive properties is injected as working fluid, and after its injection, zones with electroconductive properties are artificially created. Electrodes from working fluid with electroconductive properties are connected into circuit, then voltage in heating wells is increased, heating-up and burst between connected neighbouring heating wells take place, electric arcs are turned on and they are treated with mineral deposit plasma. At new deposits, heating wells are cased with electroconductive fibreglass pipes, and they are arranged at a specified distance from each other. Production wells are positions between heating wells. Operated deposits are drilled with additional heating wells. Their walls are not secured with casing pipes within beds, heating wells are drilled out number of times and their diameter is increased to the extent necessary for better filtration. After completing the full cycle of beds treatment, rotation of heating wells takes place in order to use them as production wells. In case of suite from many beds, intraformational spaces are treated several times with plasma of electric arcs of one or few upper or lower nearest neighbouring beds in suites or located inside of suites at close distance from beds of water-bearing strata of groundwater. At that, stressed-deformed state of other nearby upper or lower beds in suite is changed and their ground pressure is reduced. Electroconductive working fluid is injected many times after specific time intervals into artificially created layers, zones and areas with electroconductive properties in layers or their nearby water-bearing formations of groundwater. Intraformation pressure at deposits is maintained, for which electric arcs are turned on at the same time between specific neighbouring heating wells or between all heating wells at deposits.

EFFECT: invention provides for the most complete recovery from deposits of high-viscosity and other oil, bitumen, shale oil, gas condensate, shale and natural gas, as well as for coal gasification and mining of other minerals.

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