川东南地区茅口组层序地层及沉积相浅析
网络出版日期: 2010-06-15
基金资助
国家自然科学基金委员会与中国石油化工股份有限公司联合基金资助项目(编号:40739903)“四川盆地东南重点层位沉积相与储层预测”:国家重大专项(编号:2008ZX05005—002一008HZ)“大型油气田及煤层气开发”部分成果。
Analysis of sequence stratigraphy and sedimentary facies of M aokou Formation in southeastern Sichuan
Online published: 2010-06-15
罗 鹏,李国蓉,施泽进,周大志,汤鸿伟,张德明 . 川东南地区茅口组层序地层及沉积相浅析[J]. 岩性油气藏, 2010 , 22(2) : 74 -78 . DOI: 10.3969/j.issn.1673-8926.2010.02.013
On the basis of the knowledge of the depositional setting of Maokou Formation in southeastern Sichuan,Combined with outcrop,well log and well logging data,the Maokou Formation is divided into three third-order sequences.According to the research on the lithology,phase sequence and lithologic profile,the sign for identifying and classifying the key sequence surface is expounded,and the characteristics of the every system tracts are summarized.It is believed that the strata at Maokou stage in the study area have the characteristics of rapid tran sgression and slow regression,well sequence comparison and epicontinental platform nature.Therefore,according to the depositional model of epicontinental platform ,the sedimentary facies in the study area can be divided into subtidal low energy zone,subtidal high energy zone,tide flat and lagoon.The sedimentary facies on the vertical and plane profile is described making the system tract a8 unit.Combined with the sequence and the evolution of the sedimentary facies,the depositional model of Maokou Formation is proposed.The beach facies being favorable for reservoir development mainly develops in the high-stand system tract.
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