%0 Journal Article
%T 川西中二叠统表生岩溶发育规律及控制因素研究<br>Development Pattern and Controlling Factors of Middle Permian Epigenetic Karst in Western Sichuan Basin
%A 韩月卿
%A 金振奎
%A 韩文彪
%J Advances in Geosciences
%P 483-494
%@ 2163-3975
%D 2022
%I Hans Publishing
%R 10.12677/AG.2022.124049
%X 川西地区中二叠统地层主要为碳酸盐岩台地相沉积，中二叠世末发生的东吴运动导致茅口组地层抬升遭受大气淡水淋滤剥蚀，发育表生岩溶古地貌，产生大量的溶蚀孔洞，为储集油气提供良好条件。针对川西地区中二叠统表生岩溶发育规律及控制因素研究认识不清的问题，本文以野外露头、岩心、测井、地球化学等资料为依托，对栖霞组和茅口组的岩溶典型特征进行了详细总结。通过对于岩溶响应特征的统计分析，本文系统总结了岩溶储层在垂向和平面上的发育规律。利用残余厚度法开展了茅口组和栖霞组顶部古地貌形态的精细刻画，将其划分为岩溶洼地、岩溶斜坡和岩溶高地3种地貌单元。通过把钻井放空漏失情况和野外露头岩溶现象进行叠合，认为岩溶洼地最有利于表生岩溶储层的发育。岩溶洼地虽能汇水，但不积水，地表水汇聚后对地层下蚀和侧蚀，有利于岩溶储层发育。经讨论分析得到，川西地区中二叠统表生岩溶储层主要受控于古地貌、沉积间断、岩性和沉积相等因素。本次研究可为川西地区中二叠统表生岩溶储层勘探开发提供地质理论和依据。<br />
The middle Permian strata in western Sichuan basin are mainly carbonate platform face deposites. The Dongwu Movement at the end of the Middle Permian resulted in the uplift of the Maokou Formation, which was eroded by atmospheric fresh water leaching and developed the epigenetic karst palaeogeomorphology, producing a large number of dissolution pores and providing good conditions for the storage of oil and gas. In response to the poor understanding of the development pattern and controlling factors of the Middle Permian epigenetic karst in western Sichuan, this paper summarizes in detail the typical characteristics of karst in Qixia and Maokou formations based on field outcrops, cores, logs and geochemistry. Through the statistical analysis of karst characteristics, this paper systematically summarizes the development pattern of karst reservoir in vertical and plane. The palaeogeomorphology of the top of Maokou formation and Qixia Formation is described by residual thickness method, which is divided into three geomorphic units: karst depression, karst slope and karst highland. Based on the superposition of drilling and outcrop karst, it is concluded that karst depression is the most conducive to the development of epigenetic karst reservoirs. Although the karst depression can collect water, it does not accumulate water. The convergence of surface water is conducive to the development of karst reservoirs by downward and lateral erosion of strata. After discussion and analysis, it is obtained that the epigenetic karst reservoirs of Middle Permian in western Sichuan basin are mainly controlled by palaeogeomorphology, sedimentary interruption, lithology and sedimentation. This study can provide geological theory and basis for the exploration and development of Middle Permian epigenetic karst reservoirs in western Sichuan Basin.
%K 四川盆地西部，中二叠统，表生岩溶，发育规律，控制因素<br>Western Sichuan Basin
%K Middle Permian
%K Epigenetic Karst
%K Development Pattern
%K Controlling Factors
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=50215