Spacing Chart for Ultra-low Permeability Reservoirs

Abstract

The foreign TM oilfield is an ultra-low permeability reservoir with deep burial, poor reservoir properties, poor seepage capacity and severe heterogeneity. The production declined rapidly during water injection development process, and the absorption capacity of the injection well is poor. Some production wells are not affected by the injection wells. In order to improve the effect of water injection development, it is necessary to infill the existing well pattern, reduce the injection-production well spacing, and establish an effective driving system for the reservoir to improve the reserves utilization. This paper classifies the effect of water injection development in foreign TM oilfield, establishes the relationship between injection-production well spacing and formation permeability, and then obtains the effective driving well spacing under different permeability of ultra-low permeability reservoirs. This method plays an important role in the study of well pattern deployment in the water injection development process of ultra-low permeability reservoir.