A study on development effect of horizontal well with SRV in unconventional tight oil reservoir

Abstract

Unconventional tight oil and gas are the main body of the increase of reserve and production in Ordos Basin. Based on the tight oil reservoir in Ordos Basin, a 7 point pattern well group numerical mechanism model with a multi-stage and multi-cluster horizontal production well in the middle and 6 vertical injection wells on the edge is established. PR3 equation of state model is used in the numerical model. The stimulated reservoir volume of horizontal well is realized by local grid refinement, and the wire-mesh model is used to simulation hydraulic fracture network. Application of the model, the development effect factors of tight oil reservoir are analyzed, which contain development methods (depletion development, water flooding development and CO2 flooding development), reservoir permeability, SRV size, fracture density, fracture conductivity and cluster spacing. The results of this paper can offer suggestions to fractured horizontal well design and tight oil reservoir development.