泸州古隆起地区嘉陵江组层序特征及其对碳酸盐岩储层的控制

永颉同心

摘　要：在对研究区嘉陵江组沉积背景认识的基础上,通过对嘉陵江组岩性剖面结构的细致分析,将其划分为2个三级层序、6个四级层序和14个五级层序,认识到高频层序在海侵体系域和高水位体系域中有不同的岩性组合类型,建立了研究区嘉陵江组三级层序和高频层序格架.在研究区嘉陵江组储层特征认识的基础上,运用层序地层学原理,通过分析碳酸盐生长与相对海平面变化的关系,以及气候类型对高频层序演化的控制作用,建立了干旱气候背景下高水位体系域和海侵体系域中高频层序与溶蚀孔隙型储层形成的关系模式,并且层序表现出对溶蚀孔隙型储层和膏溶孔洞型储层发育分布具有重要控制作用;认为二级构造层序影响着岩溶缝洞型储层和裂缝-溶洞型储层的形成发育.总结出与各级层序相关的暴露期间大气水溶蚀作用(包括同生期和表生期)为研究区嘉陵江组储层形成的主要机制.
关键词：泸州古隆起;嘉陵江组;干旱气候;层序;高频层序;碳酸盐岩储层

基金项目：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(批准号:40739903).
作者简介：乔占峰 男 1983年出生 在读硕士 层序地层学与储层
作者单位：乔占峰（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059）　
　　　　　李国蓉（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059）　
　　　　　李弢（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059;中国石油西南油气田分公司蜀南气矿,四川泸州,646000）　
　　　　　王鑫（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059）　
　　　　　于海波（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059）　
　　　　　邓小江（成都理工大学油气藏地质及开发工程国家重点实验室,成都,610059;四川石油管理局地球物理勘探公司物探研究中心,成都,610213）
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