The use of technology of separating horizontal wells into sections by packers in conjunction with a new geological structure concept of deposits 302-302 of the Romashkino Field

Abstract

The work considers deposits 302-303 of the Kuakbashsky area of the Romashkino oil field. The deposits 302-303 are confined to the carbonate layer of the Bashkirian and Serpukhovian sediments of the Middle and Lower Carboniferous, with various types of voids: intergranular, fractured and cavernous. Based on the analysis of seismic data, aerospace and geophysical data, a new model of the geological structure of deposits 302-303 was created, taking into account faults and lineaments. An analysis was made of the dynamics of horizontal wells operation, depending on the location of decompression zones, which confirmed the geological model of the deposit structure proposed by the authors. Based on the geological structure, solutions are proposed for optimization of deposits development: During the establishment and operation of wells, it is necessary to take into account the faults location, their type, strike, predicted locations of high fracturing and cavitation zones to improve well performance; The production mode should be developed with the obligatory observance of a balance between the filtration rate of oil from caverns into cracks and the flow of liquid from the production well. The conducted analysis shows the complete absence of dependence of the development efficiency on the implementation of various technological measures. A comprehensive approach to the deposit blocks (limited by tectonic faults) is required, starting with the selection of the block (the direct drilling site), ending with the selection modes, sequence, type and complex of geological and technical measures, individually for each well of the block.