川西地区栖霞组储层测井识别与流体性质判断

摘要

Exploration drilling shows that the reservoirs in the Qixia formation in west Sichuan Basin have complex lithology, diversified reservoir spaces, severe reservoir heterogeneity and anisotropy. It is difficult to identify reservoir and fluid property by logging. Based on analysis of reservoir characteristics, this paper summarizes the log response characteristics of fracture - pore ( hole) dolomite reservoir and fractured limestone reservoir, analyzes four influencing factors on fluid property discrimination, including lithology , physical property, reservoir space type and water salinity, and puts forward acoustic - neutron porosity overlaying method and wireline formation test method to identify reservoir fluid property for the study area.%川西地区栖霞组储层的岩性复杂,储集空间类型多样,储层非均质性与各向异性较强,对其进行测井识别与流体性质判断较困难.在分析研究区储层基本特征的基础上,总结了裂缝-孔(洞)型白云岩储层和裂缝型灰岩储层的测井响应特征,分析了岩性、物性、储集空间类型与地层水矿化度等4种影响流体性质判别的因素,提出了声波-中子孔隙度重叠法与MDT测试法2种适合研究区储层流体性质判别的方法.