The Optimization of Well Pattern in Ultralow-Permeability Reservoir

摘要

The reasonable well pattern arrangement is a key factor thatrnultra-low permeability oilfield are developed successfullyrnbecause it is usually relative to fracture. By using numericalrnmodeling, driving replacement etc reservoir engineeringrnmethods after reviewing the evolution of well pattern forrnChangqing ultra-low permeability reservoir, the paper presentsrnrhombus inverted nine-spot and rectangle well patternrnmatching best the fracture and injection-production pressurernsystem. In the development practice, we adopt square invertedrnnine-spot, rhombus inverted nine-spot, rectangle well patternrnaccording to little, relative, good of fracture growth, and havernachieved better development effects.