西南石油大学学报（自然科学版）Issue(1)：85-90,6.DOI:10.11885/j.issn.1674-5086.2013.05.08.01
塔南凹陷复杂岩性低渗透储层测井岩性识别
Lithology Recognition with Well Logs in Complex Lithologic Low Permeability Reservoirs in Ta′nan Depression
摘要
Abstract
Lithology recognition is the key geological problem in the exploitation of complex lithology low permeability reservoir. This study takes Cretaceous in Ta′nan Depression as an example to explore well logging lithology recognition method of complex lithology reservoir. Normal terrigenous clastic debris and volcanic debris deposited together in Cretaceous in Ta′nan Depression. Tuffaceous glutenite,tuffaceous sandstone,sedimentary tuff,volcanic tuff,sandstone,conglomerate and mud-stone deposited in Tongbomiao Formation in Cretaceous. It has a very complex lithology and bad petrophysics,typical of low lithology-electric property contrast. Based on the study of well logging characteristics among strata of different lithologies, four types of well logs are chosen in comprehensive lithology interpretation. Fisher discriminant analysis is used to diminish well log differences of the same type of strata and magnify well log differences of different type of strata. Discriminant functions for the seven lithology types of the study area are built to realize well log lithology recognition of wells without drilling cores. The lithology recognition validity is as high as 98.1%. The lithology recognition method built in this study resolves the problem of lithology recognition with well logs in complex lithology low permeability reservoirs and provides technical support for reservoir development.关键词
Fisher判别/复杂岩性/低渗透储层/岩性识别/测井Key words
Fisher discriminant analysis/complex lithology/low permeability reservoir/lithology recognition/well logging分类
能源科技引用本文复制引用
张宪国,张涛,林承焰,于景锋..塔南凹陷复杂岩性低渗透储层测井岩性识别[J].西南石油大学学报（自然科学版）,2015,(1):85-90,6.基金项目
国家自然科学基金项目（41202092）；国家重大科技专项（2011ZX05009-003）；中国博士后科学基金（2012M0521366）。 （）
