石油实验地质2019，Vol.41Issue(1)：113-120,8.DOI:10.11781/sysydz201901113
辽河西部凹陷页岩纹层结构及其储集空间意义
Laminated texture of shale and its storage space significance in Western Depression, Liaohe Basin
摘要
Abstract
Almost all organic-rich shale contains stratigraphic structures to varying degrees, reflecting different sedimentary facies, shale organic matter abundance, hydrocarbon generation capacity, reservoir space and gas content. The organic matter (OM) can be divided into three types of occurrence state, namely continuous lamellae, discontinuous lamellae and scattered lamellae, based on the sedimentary characteristics of organic-rich shale in lacustrine rift basins and the heterogeneity of the OM distribution. The black shale stratigraphic structure of the Western Depression of Liaohe Basin was studied using core observation, thin section analysis and scanning electron microscopy, and combined with statistical analysis. The organic-rich shale in the fourth member of Shahejie Formation (Sha-4) was mainly deposited in a semi-deep lake under brackish water conditions, developing carbonate-curved continuous laminae and clay-type flat continuous laminae. The Sha-3 shale, deposited in a freshwater deep-semi-deep lake, is dominantly composed of felsic interlaced laminae and dispersed laminae. The continuous carbonate-mixed lamellar shale can be related to chemical interactions, biochemical interactions caused by algae, or a combination of these two. The organic-rich clay shale is mainly composed of seasonal lamellae formed by climate change. The discontinuous striated layers usually consist of clay lamellae, and silt and clay are seasonally input in the form of advection or inter-layer flow. The shale lamellar morphology largely determines hydrocarbon generation capacity and characteristics, and further may influence reservoir capacity. The continuous lamellae are generally characterized by关键词
纹层结构/储集空间/黑色页岩/辽河西部凹陷Key words
laminated texture/storage space/black shale/Western Depression/Liaohe Basin分类
能源科技引用本文复制引用
毛俊莉,张金川,刘通,丁江辉..辽河西部凹陷页岩纹层结构及其储集空间意义[J].石油实验地质,2019,41(1):113-120,8.基金项目
国家科技重大专项(2016ZX05034-002-001) （2016ZX05034-002-001）
国家自然科学基金(41272167) （41272167）
中国石油重大攻关课题(2011A-4804)联合资助 （2011A-4804）
