Study on Matching Optimization Design of Well Pattern and Fracture Network in Ultra-low Permeability Reservoir

Abstract

In view of the poor effect of well pattern infilling and reservoir reconstruction in the ultra-low permeability reservoir of Fuyang oil layer in the periphery of Daqing and it is impossible to establish effective dis-placement, the research on the coordinated overall production mode of well pattern infill combined with fracture network fracturing is carried out. Based on the analysis of the characteristics of ultra-low permeabil-ity actual blocks, a high-precision unstructured model with local grid encryption is established to accurately characterize the fracture network, optimize the well completion and pump injection fracturing construction parameters, determine the amount of well fracturing fluid and proppant when meeting the design half fracture length and the requirements of forming fracture network, form the design method and process of complex fracture network representation. The optimization design of different well pattern infill methods and different well fracture matching schemes is carried out. The research shows that inter rows plus rows combined with fracture network fracturing is the best way of well fracture collaborative production in ultra-low permeability reservoir of Fuyang oil layer, which provides a basis for realizing full production of reserves in ultra-low permeability reservoir.

Copyright 2022, IFEDC Organizing Committee

This paper was prepared for presentation at the 2022 International Field Exploration and Development Conference in **’an, China, 16–18 November 2022.

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