METHOD FOR DEVELOPMENT OF OIL DEPOSIT BY HORIZONTAL WELL Russian patent published in 2024 - IPC E21B7/04 E21B43/00 

FIELD: oil industry.

SUBSTANCE: method for development of an oil deposit with a horizontal well includes determination of absolute elevations for the entry point of the horizontal wellbore, designing the profile of the horizontal well and drilling the horizontal well. Entry point, intermediate points and bottomhole point of the horizontal wellbore are pre-determined according to the design grid of wells. Further, at the entry point, intermediate points and bottomhole point, absolute elevation of the roof of the first oil-saturated interlayer of the reservoir of the development object is determined, vertical thickness of oil-saturated interlayers of the reservoir, coefficients of open porosity, oil saturation for each oil-saturated interlayer, gas saturation pressure of reservoir oil and formation pressure of the development object at the drilling site. Then for the horizontal shaft at the entry point, at the intermediate points and at the bottomhole point, the weighted average porosity coefficient, weighted average oil saturation coefficient, as well as the distance from the roof of the first oil-saturated interlayer are determined. Further, absolute elevations for the horizontal shaft are determined at the entry point, at intermediate points and the bottomhole point. After that, the horizontal well profile is corrected in accordance with the determined absolute elevations for the horizontal shaft at the entry point, at intermediate points and bottomhole point, horizontal well is drilled along specified profile and horizontal well is operated.

EFFECT: ensuring increased efficiency of the method of developing an oil deposit with a horizontal well.

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