摘要
川东北地区侏罗系自流井组大安寨段地层岩性复杂,包括泥岩(页岩)、灰岩(含泥灰岩、泥质灰岩)和砂岩(粉砂岩、细砂岩)。针对研究区几种主要岩性,利用取心分析和岩屑录井资料综合标定,自然伽马、深侧向电阻率、三孔隙度、伽马能谱等测井项目的数据经过交会分析,优选出对岩性敏感的自然伽马、钍、钾测井曲线,经过适当刻度利用改进的重叠法进行岩性识别。识别结果与岩心分析和录井描述符合较好,岩性识别符合率达到84.7%,对该研究区储层测井评价及有类似地质特征地层的岩性识别有一定的指导意义。
In Daanzhai Section of Jurassic Ziliujing Formation in Sichuan Basin,there existed complex lithologic properties,such as mud stone(shale),limestone(marl,argillaceous limestone) and sandstone(siltstone and fine sandstone).For identifying the main lithology in the studied area,on the basis of coring data and rock cuttings logging data,the cross-plots of logging curves of natural gamma,resistivity,three porosity and gamma spectrometry were used to optimize the sensitive logging parameters such as gamma ray,Th,K.Then these parameters were scaled and overlapped to identify the lithology.The identifying results agree with those of core analysis and well logging.The coincidence rate is 84.7%.It provides guidance for the reservoir logging evaluation and lithologic identification of strata with similar geology characteristics.
出处
《石油天然气学报》
CAS
CSCD
2013年第4期92-95,167,共4页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2011ZX05031-003-006HZ
2011ZX05031-002-006HZ)
国家自然科学基金(41202110)
中国石油重大科技专项(2011E-0305)
西南石油大学校级科技基金项目(2012XJZ004)
关键词
致密储层
测井
岩性识别
交会图
重叠法
tight reservoir
logging
lithologic identification
cross plot
overlapping method
