玛湖凹陷二叠系风城组细粒沉积岩米氏旋回识别及意义  

Identification and significance of Milankovitch astronomical cycles of fine-grained sedimentary rocks,Permian Fengcheng Formation in Mahu Sag

作　　者：王小军[1] 冯右伦[2] 杨森[2] 邹阳 黄立良[2] 钱永新[2] 何文军[2] 常秋生[2] 贺萍 王青春 惠婧 WANG Xiaojun;FENG Youlun;YANG Sen;ZOU Yang;HUANG Liliang;QIAN Yongxin;HE Wenjun;CHANG Qiusheng;HE Ping;WANG Qingchun;HUI Jing(Xinjiang Oilfield Company, PetroChina, Karamay 834000, China;Exploration and Development Research Institute, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China;College of Geosciences, Hebei GEO University, Shijiazhuang 050031, China)

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]河北地质大学地球科学学院,河北石家庄050031

出　　处：《西北大学学报（自然科学版）》2022年第1期128-143,共16页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(41802016);山东省沉积成矿作用与沉积矿产重点实验室开放基金资助项目(DMSM20190027);河北省教改项目(2020GJJG589);河北省研究生示范课程建设项目(KCJSX2021092)。

摘　　要：综合利用地震、钻井、测井和分析测试等资料,采用经典层序地层学与旋回地层学相结合的方法,建立玛湖凹陷二叠系风城组的高精度层序地层格架,分析风城组细粒沉积岩的米氏旋回特征,并对其地质意义进行剖析。研究结果表明,玛湖凹陷风城组细粒沉积岩保留了米氏旋回信息,风城组可识别出2个长期旋回,并可进一步划分为9个中期旋回和16个短期旋回;旋回演化与气候变化密切相关,控制着细粒沉积岩的岩性特征;旋回特征对烃源岩的发育特征和分布规律以及甜点储层的发育特征和发育类型表现出了明显的控制作用。Based on seismic,drilling,logging and analysis and testing data,a high precision sequence stratigraphic framework of the Permian Fengcheng Formation in Mahu Sag was established by combining classical sequence stratigraphy with cyclostratigraphy,and the Milankovitch cycles characteristics of fine-grained sedimentary rocks were analyzed and their geological significance was analyzed.The results show that the Milankovitch cycles are preserved in the fine-grained sedimentary rocks of Fengcheng Formation.The Fengcheng Formation can be identified as two long-term cycles,which can be further divided into 9 medium-term cycles and 16 short-term cycles.The evolution of the sedimentary cycles is closely related to climate changes and controls the lithologic characteristics of fine-grained sedimentary rocks.Further research showed that the development characteristics and distribution of source rocks,the development characteristics and types of sweet spot reservoirs,are all obviously controlled by Milankovitch cycles.

关 键 词：玛湖凹陷 风城组 细粒沉积岩 层序地层 米氏旋回 

分 类 号：P539.2[天文地球—古生物学与地层学] TE122[天文地球—地质学]