沉积与特提斯地质2026，Vol.46Issue(2)：494-506,13.DOI:10.19826/j.cnki.1009-3850.2026.01003
四川盆地蓬莱气区沧浪铺组白云石化作用与鲕粒云岩储集性
Dolomitization and oolitic dolomite reservoir properties of the Canglangpu Formation in the Penglai gas area,Sichuan Basin
摘要
Abstract
The Canglangpu Formation in the Penglai gas area of the Sichuan Basin plays a crucial role in oil and gas accumulation and is considered an important backup field for risk exploration.This study focuses on three typical wells in the Canglangpu Formation in the Penglai gas area.According to their petrological characteristics,cathodoluminescence and scanning electron microscopy,the influence of fabric selective dolomitization on reservoir property is analyzed and studied.The results show that:(1)Oolitic dolomite is the most common type of grain dolomite in the Canglangpu Formation,while other types being rare.Based on the position and morphology characteristics of the oolitic dolomite,it can be subdivided into oolitic dolomite,cloud pelitic oolitic dolomite,and sparry oolitic limestone dolomite;(2)The reservoir in the Canglangpu Formation is mainly porous,with main types of reservoir spaces including intergranular(dissolved)pores,intragranular(dissolved)pores,intercrystalline(dissolved)pores and a small number of fractures;(3)Diagenetic processes affecting the Canglangpu Formation reservoir mainly include micritization,cementation,dolomitization,recrystallization,hydrocarbon charging and dissolution.It is considered that dolomitization is an important factor in the formation of high-quality reservoirs.Analysis indicates that high-quality reservoirs are more commonly found in cloud pelitic oolitic dolomites,followed by oolitic dolomites,while sparry oolitic limestone dolomites are the least conductive to high-quality reservoir formation.关键词
鲕粒云岩/组构选择性白云石化/储层/蓬莱气区/沧浪铺组Key words
oolitic dolomite/fabric-selective dolomitization/reservoir/Penglai gas area/Canglangpu Formation分类
天文与地球科学引用本文复制引用
陈迪,张驰,甯濛,王瀚,钟瀚霆,王夏,张本健,李勇,李心怡,周刚,张亚,严威,龙虹宇,李成龙..四川盆地蓬莱气区沧浪铺组白云石化作用与鲕粒云岩储集性[J].沉积与特提斯地质,2026,46(2):494-506,13.基金项目
国家自然科学基金"扬子西北缘早古生代海相盆地多幕次构造-沉积转换及其成烃成储响应"(U2344209) （U2344209）
中国石油西南油气田公司科技项目"扬子西缘震旦系-下古生界碳酸盐岩含油气系统研究"(2025D00101) （2025D00101）
