摘要
为阐明川东地区茅口组储层特征,厘清储层发育的主控因素,基于野外露头、钻井岩心以及大量测井资料,开展了川东地区茅口组储层特征研究。结果表明:1)亮晶颗粒灰岩、颗粒云岩与细—中晶白云岩为川东地区茅口组主要储集岩;2)溶洞与裂缝在石灰岩和白云岩中均有发育,孔隙主要分布于细—中晶白云岩中;3)茅口组储层主要分布于茅二a,b亚段,平面上受到颗粒滩及断裂带的控制;4)颗粒岩为茅口组储层提供了物质基础,是形成储层的最重要因素,断裂系统决定了储层的最终分布,表生期岩溶以及白云石化作用形成了大量储集空间,是改善储层质量的关键。研究认为,邻水—丰都一带沿15#基底断裂分布的茅二a,b亚段地层中的颗粒滩可以作为重点勘探开发目标。
In order to elucidate the reservoir characteristics of Maokou Formation in eastern Sichuan Basin and to clarify the main controlling factors of reservoir development,the reservoir characteristics of Maokou Formation in eastern Sichuan Basin are studied based on field outcrops,drilling cores,and a large amount of logging data.The results indicate that:(1)Bright granular limestone,granular dolomite and fine-mesocrystalline dolomite are the main reservoir rocks of Maokou Formation in eastern Sichuan Basin.(2)Caves and fractures are developed in both limestone and dolomite,and pores are mainly distributed in fine-mesocrystalline dolomite.(3)The Maokou Formation reservoirs are mainly distributed in Mao 2 a and b submembers,which are controlled by grain shoals and fault zones on the plane.(4)Granular rock provides the material foundation for the Maokou Formation reservoir,which is the most important factor in forming the reservoirs.The fault system determines the final distribution of the reservoir,and the supergene karstification and dolomitization form a large amount of reservoir space,which is the key to improving reservoir quality.The results show that the grain shoals in the Mao 2 a and b submembers distributed along the 15#basement fault in the Linshui-Fengdu area can be a key target for exploration and development.
作者
钟佳倚
王尉
刘冉
李阳
杨西燕
白晓亮
范存辉
彭思桥
袁小玲
ZHONG Jiaqi;WANG Wei;LIU Ran;LI Yang;YANG Xiyan;BAI Xiaoliang;FAN Cunhui;PENG Siqiao;YUAN Xiaoling(Exploration and Development Research Institute,Southwest Oil&Gas Field Company,PetroChina,Chengdu 610041,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)
出处
《断块油气田》
CAS
CSCD
北大核心
2024年第2期308-318,共11页
Fault-Block Oil & Gas Field
基金
四川省科技攻关项目“四川盆地岩性地层油气综合地质研究与目标评价”(2022KT0401)。
关键词
石灰岩储层
白云岩储层
主控因素
茅口组
川东地区
limestone reservoir
dolomite reservoir
main controlling factors
Maokou Formation
eastern Sichuan Basin
