头台油田扶余油层油水判别方法研究

大庆头台油田的地层水严重制约着油田的开发,扶余油层复杂的河流-三角洲相沉积体系以及高含量的钙质、泥质和低孔低渗的储层特征给油水层判别带来了困难。通过分析储层特征、流体参数等因素对测井曲线的影响,选择了符合研究区地层水识别的特征参数;同时结合地质、取心、生产动态等资料分析,建立了综合判别油水层流体性质的图版;并对疑难层位进行了重点分析,经验证,油层和水层的解释精度均达到了90%。

Fuyu layer reservoir oil-water discriminant method in Tou Tai oilfield

The formation water in Toutai Oilfield of Daqing restricts the oilfield development seriously, complex river-deltaic depositional systems, high levels of lime and shale, along with lower porosity and permeability reservoir characteristics bring difficulty to the discrimination of oil and water layers. Through analysising how are the factors, such as reservoir characteristics, fluid parameters and so on, to affect the logging curves, choose characteristic parameters of the formation water recognition corresponding with the study area. Then combing with data analysis of geological, coring, production dynamic and so on, establish the chart judging comprehensively the oil and water layers fluid properties and mainly discuss on the complex layers. The results show that the precision of the discrimination of oil and water layers is reaching above 90%.