Application of trend surface analysis to reservoir distribution in Wayaopu Oilfield

Abstract

In order to determine the distribution of oil reservoirs, the trend value and residual value of the top structure and layer thickness of Chang-6 in Wayaopu Oilfield were analyzed by using the method of trend surface analysis, and the relationship between oil well distribution, production, structural location and residual value was comprehensively analyzed by combining the existing geological data. This study uses the method of mathematical modeling to deepen the study of reservoir distribution law through existing data. The results show that the existing oil wells have obvious combination characteristics on the structural residual trend and thickness residual trend. Most oil wells in the structural positive residual area and the thickness negative residual area have high productivity, and the structure has become the main factor to control the oil well productivity. Through the significance test, it is proved that the mathematical model conforms to the actual geological conditions and has guiding significance for the distribution of oil reservoirs in the study area.