石油实验地质2017，Vol.39Issue(6)：790-796,7.DOI:10.11781/sysydz201706790
塔里木盆地哈拉哈塘地区奥陶系储层古岩溶作用及其与裂缝的关系
Paleo?karstification of the Ordovician carbonate reservoirs and the relationship with fractures in the Halahatang area of Tarim Basin
摘要
Abstract
The Ordovician reservoirs in the Halahatang area of Tarim Basin are carbonate reservoirs and the storage space is karstic vugs and fractures. Types and characteristics of paleo?karstification in the Ordovician carbonate reservoirs were comprehensively analyzed by outcrop study,core observation,thin section analysis,SEM?CL spec?trum and SEM?EDS analysis. Coarse?clast collapsed chaotic breccia facies,fine?clast transported chaotic breccia facies, highly disturbed strata facies and undisturbed strata facies were identified in the Xikeer outcrop by outcrop analog. Chaotic breccia related to paleo?caves was found in different formations of the Ordovician under core observation. The Ordovician reservoir experienced three types of paleo?karstification,including penecontem?poraneous karstification, weathering karstification and buried karstification. Different karstic vugs demonstrated different SEM?CL spectrums. Widely developed fractures in the reservoir have a significant influence on burial karstification. On one hand,factures promoted karstification by connecting stylolite networks;on the other hand, fractures induced karstification by carrying deep hydrothermal fluids into the reservoir.关键词
岩溶作用/碳酸盐岩/奥陶系/哈拉哈塘地区/塔里木盆地Key words
karstification/carbonate reservoir/Ordovician/Halahatang area/Tarim Basin分类
能源科技引用本文复制引用
吴国强,张丽娟,杨振周,袁文芳,齐春艳,叶禹..塔里木盆地哈拉哈塘地区奥陶系储层古岩溶作用及其与裂缝的关系[J].石油实验地质,2017,39(6):790-796,7.基金项目
中石油塔里木重大专项之"塔北超深碳酸盐岩油藏勘探开发关键技术"(2014E-2015)资助. （2014E-2015）
