地化录井油层水淹状况评价方法

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

油藏水驱开发过程中，随着水淹程度的不断增加，储层中的原油性质产生了相应的变化，通过对开发调整井的岩心或岩屑进行地球化学录井，可以获得单位岩石含油量ST，氯仿沥青“A”等多项参数，这些参数的变化可以判别油层的开采状况，评价油层水淹程度。矿场应用结果表明，解释符合率在75％左右。

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%.