A New Method to Evaluate Waterflooded State of Oil Reservoirs-Geochemical Logging

Reservoir oil properties vary correspondingly as the waterflooded extent continuously goes up during water drive development. Parameters such as crude oil content in unit rock volume and chloroform bitumen can be achieved through geochemical logging ih adjustment wells.Production status and waterflooded extent can be determined according to the variations of these parameters.Field application shows that the coincidence rate of interpretation is about 75%.