辽东地区上古生界层序地层格架及生储盖特征  

UPPER PALEOZOIC SEQUENCE STRATIGRAPHIC FRAMEWORK AND SOURCE-RESERVOIRCAP CHARACTERISTICS IN EASTERN LIAONING PROVINCE

作　　者：吴炳伟[1] 崔晓磊[1] 赖鹏[1] 周铁锁[1] 孙转[1] WU Bing-wei;CUI Xiao-lei;LAI Peng;ZHOU Tie-suo;SUN Zhuan(Exploration and Development Research Institute,Liaohe Oifield Branch Company of PetroChina,Panjin 124010,Liaoning Province,China)

机构地区：[1]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010

出　　处：《地质与资源》2024年第5期653-661,共9页Geology and Resources

基　　金：中国石油天然气股份有限公司重大科技专项“辽河探区可持续规模增储勘探关键技术研究”(2017E-1601);辽河油田公司科技项目“辽河坳陷区域构造演化与主要构造层分布”(2023QZJC-02)。

摘　　要：辽东地区上古生界石炭系-二叠系发育较齐全.在区域构造沉积演化、岩石组合特征、沉积相分析等研究基础上,运用层序地层学理论和方法,对辽东地区上古生界进行层序地层研究.将石炭系本溪组-二叠系蛤蟆山组划分为1个超层序、6个层序,分别发育于陆表海、滨岸、三角洲及河流沉积背景下.通过建立区域层序地层格架,探讨在层序地层格架内以体系域为单位的生储盖组合发育特征,认为上古生界区域性烃源岩和盖层主要形成于凝缩段和水进体系域上部、高位体系域下部,有利储层主要发育在低位体系域和水进体系域,纵向上构成2种类型5套生储盖组合,其中山西组“自生自储型”为上古生界致密砂岩气最有利的组合类型.The Upper Paleozoic Carboniferous-Permian strata are well developed in eastern Liaoning Province.Based on the regional tectonic sedimentary evolution,rock association characteristics and sedimentary facies analysis,the paper studies the sequence stratigraphy of Upper Paleozoic in eastern Liaoning with the theory and method of sequence stratigraphy.The Carboniferous Benxi Formation-Permian Hamashan Formation is recognized as 1 supersequence including 6 sequences,which are developed in epicontinental sea,shoreland,delta and fluvial sedimentary setting respectively.By establishing the regional sequence stratigraphic framework,the paper discusses the development characteristics of source-reservoir-cap assemblages with system tract as unit in the sequence stratigraphic framework.It is considered that the Upper Paleozoic regional source rocks and caps were mainly formed in the condensed section and upper transgressive system tract,and the lower highstand system tract,with the favorable reservoirs mainly developed in the lowstand and transgressive system tracts,forming two types,five sets of source-reservoir-cap combinations vertically,among which the self-generation and self-reservoir type of Shanxi Formation is the most favorable assemblage of Upper Paleozoic tight sandstone gas.

关 键 词：层序地层 上古生界 生储盖组合 体系域 辽东地区 

分 类 号：P618.13[天文地球—矿床学] P539.2[天文地球—地质学]