海相油气地质2016，Vol.21Issue(3)：1-12,12.DOI:10.3969/j.issn.1672-9854.2016.03.001
多资料约束下的塔里木盆地寒武系层序地层划分与对比
Division and Correlation of Cambrian Stratigraphic Sequences under Multiple Data Constraint, Tarim Basin
摘要
Abstract
Cambrian outcrops are rare in distribution in Tarim Basin and only a few dril ed wel s penetrated through the whole Cambrian strata. These facts make difficulty for geologists to carry out the study of basin-scaled stratigraphic sequence. On the base of the data from outcrops at Xiaoerbulake, a detailed analysis of stratigraphic sequence framework was conducted according to the lithofacies characteristics and their stacking patterns. The Cambrian strata consists of 8 Ⅲ-order sequences and 18 Ⅳ-order sequences. The lithologic sections of wel s obtained by geological logging are low in accuracy, which can't meet the requirement of sequence division. Based on the Fisher discriminant analysis, wel s were conducted on the lithology identification with core data and wel logging data. Depending on the Maximum Entropy Spectrum analysis of the GR curves, changing trends of the shale content in carbonate rocks within wel s were analyzed. Seismic data were also used to identify the sequence boundary. The data from 10 wel s and 1 outcrop that are representative to the W-E and N-S profiles across the basin were conducted on sequence division under constraint of multiple data. Combined with wel s and outcrop division, 2 sections of high-frequency sequence were correlated. It is concluded that, the depositing rate general y increased during Cambrian period, and depocenter migrated toward Tadong region. Different types of reservoirs occur in different sequence types. Sequence boundaries are favourable for developing good reservoirs.关键词
塔里木盆地/寒武系/层序地层/层序对比/岩相/储层Key words
Cambrian/Sequence stratigraph/Sequence correlation/Lithofacies/Reservoir/Tarim Basin分类
能源科技引用本文复制引用
王坤,刘伟,黄擎宇,石书缘,王平,张艳秋..多资料约束下的塔里木盆地寒武系层序地层划分与对比[J].海相油气地质,2016,21(3):1-12,12.基金项目
本文受国家科技重大专项“大型油气田及煤层气开发”的子课题“四川、塔里木等盆地及邻区海相碳酸盐岩大油气田形成条件、关键技术及目标评价”(编号2011ZX05004-001)资助 （编号2011ZX05004-001）
