Optimization of Unconventional Gas Reservoirs Development by Horizontal Wells with Multiple Hydraulic Fracturing

Abstract

Currently, there is only one realizable technology for development of gas shale and tight gas formations which is based on the applying of the horizontal well systems with multi-stage hydraulic fracturing. The efficiency of shale and tight gas production using this technology in a complex manner depends on some parameters of the wells design, among which, first of all, it is necessary to note: wellbore length, half-length of hydraulic fracture and number of hydraulic fracturing stages. Gas production indicators from shale and tigth formations also significantly depend on the wells grid density. In this paper, we studied the influence of these factors on the shale gas and tight gas production from reservoirs with different permeability. Also, we present the approach to determine the optimal values of wells parameters and the wells grid density