Study on Technical and Economic Limit of Layer-Recombination and Well Pattern Adjustment

DOI: 10.14800/IOGR.1145

Abstract

Three types of displacement mode coexist in NS Development Area at present, including water flooding, polymer flooding, alkaline surfactant polymer flooding. The well patterns and the injection-production relationship is complex, which leads to many difficulties on the adjustment of development plan. Combining with reservoir characteristics and well pattern deployment, this study investigates the limit of exploitable reserve and the economic limit of effective thickness of single new drilled well under the different crude oil price. Through numerical simulation, the limits of injector-producer spacing, permeability differential and maximum production well segment span were obtained. At the same time, the water flooding and the chemical flooding well patterns were considered coordinately, and the technical policy limits were summarized. The results of the study can help the well pattern adjustment for both the water flooding and the chemical flooding, and also help to lay the foundation for the long term development.