论文部分内容阅读
依据陆相层序地层学原理及野外露头层序地层学方法,对楚雄盆地东山-黑井凹陷的上寒武统—下古新统进行了系统的层序地层学研究。共识别出11个三级层序界面(其中I型4个,II型7个),界面类型包括海侵上超面、水下间断面、陆上暴露面、升隆侵蚀面及造山升隆侵蚀面等5种形式,从而将研究区划分为12个三级层序。通过层序框架下的体系域组成及可能存在的有利储集相带综合研究分析,提出了分别在低位域、海侵域和高位域控制下的有利储集层相带及展布范围。
Based on the sequence stratigraphy of terrestrial facies and the outcrop sequence stratigraphy method, the sequence stratigraphy of the Upper Cambrian-Lower Paleo-Paleocene in the Dongshan-Heijing depression of the Chuxiong Basin was systematically studied. 11 third-order sequence boundaries (including 4 types of I and 7 types of II) have been identified. The types of interfaces include the transgressive upper surface, the underwater surface, the exposed surface, the eroded surface and the orogeny Eroded surface and other five forms, so as to divide the study area into 12 third-order sequences. Based on the systematic study on the composition of the system tract and the favorable reservoir facies belt under the framework of sequence framework, the facies belts and distribution ranges of favorable reservoirs under the control of low-level, transgressive and high-level domains are proposed respectively.