川西南地区中二叠统碳酸盐岩层序格架及对滩体的控制  

Middle Permian carbonate stratigraphic lattice and its control over the beach in southwest Sichuan

作　　者：何成其 彭军[1] 刘芳兰 He Chengqi;Peng Jun;Liu Fangan(School of Earth Sciences and Technology,Southwest Petroleum University,Chengdu 610500)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500

出　　处：《石化技术》2024年第7期273-275,共3页Petrochemical Industry Technology

摘　　要：川西南地区中二叠统是近几年重要的油气勘探层位,具有较大的油气勘探潜力,但有关该地区滩相发育及其展布规律缺乏系统深入的研究。利用野外露头、测录井、岩心等资料,结合层序地层学、生物地层学以及沉积学理论,在川西南地区的沉积认识基础上,针对川西南地区中二叠统栖霞-茅口组层序格架及滩相发育规律进行研究。结果表明:川西南地区中二叠统可识别4个层序界面,发育3个三级层序Sq1、Sq2、Sq3,进一步可以划分为10个四级层序。滩体主要发育于的高位体系域(HST)内,并随着海平面下降而向海迁移,说明滩体的展布受控于层序旋回。The Middle Permian is an important oil and gas exploration horizon in southwest Sichuan in recent years,and has great potential for oil and gas exploration,but there is a lack of systematic and in-depth research on the development and distribution of tidal facies in this area.Based on the sedimentary understanding of southwest Sichuan,this study used field outcrops,logging,core and other data,combined with sequence stratigraphy,biostratigraphy and sedimentological theories,to study the sequence lattice and tidal facies development law of the Middle Permian Qixia-Maokou Formation in southwest Sichuan on the basis of sedimentary understanding.The results show that:(1)The Middle Permian in southwest Sichuan can identify four sequence interfaces,and three tertiary sequences Sq1,Sq2 and Sq3 can be developed,which can be further divided into 10 fourth-order sequences.(2)The beach body is mainly developed in the high system domain(HST)and migrates seaward with the decline of sea level,indicating that the distribution of the beach body is controlled by the sequence cycle.

关 键 词：滩体展布 层序格架 川西南 中二叠统 

分 类 号：P618.13[天文地球—矿床学]