四川盆地南部黄家场-界市场地区须家河组二段储层特征及影响因素研究  

Characteristics and influencing factors Upper Triassic Xujiahe Formation in of reservoir in the second member of Huangjiachang-Jieshichang area of Southern Sichuan Basin

作　　者：侯梅生[1] 刘子春[1] 田景春[2] 古娜[2] 

机构地区：[1]河南省地质矿产勘查开发局第一地质勘查院,河南郑州450001 [2]成都理工大学“油气藏地质及开发工程“国家重点实验室,四川成都610059

出　　处：《资源导刊（地球科技版）》2014年第9期4-8,共5页

摘　　要：四川盆地南部黄家场-界市场地区上三叠统须家河组二段（简称：须二段）储层是四川盆地重要储层发育层位和地区之一。本文在前人研究成果基础上，通过铸体薄片、普通薄片鉴定和扫描电镜详细观察，研究了须二段储层特征、储层影响因素。结果表明：须二段储层岩性以长石岩屑砂岩、岩屑长石砂岩为主，最具储集意义的是残余粒间孔和粒间溶孔，储层平均孔隙度为9．26％、平均渗透率为1．273；3×10^-3μm^2，属低孔特低渗储层。研究区须二段现今储层的分布格局是沉积作用、成岩作用和构造作用综合控制的最终结果，其中，沉积微相控制了储集砂体成因类型及分布，成岩作用制约着储层物性特征，而构造作用对储层改善起到积极作用。According to the thin section identification and the detailed analysis of scanning electron microscope, this article take the second member of Upper Triassic Xujiahe Formation in Huangjiachang- Jieshichang area of southern Sichuan Basin as a study object, the reservoir characteristicse and its influencing factors are researched in details. The results show that the types of petrology in the second member of Xujiahe Formation reservoir in this area are mainly feldspathic lithic sandtone and lithic feldspathic sandstone. The remainder intergranular pores and intergranulare dissolved pores are the most significant reservoir room. The reservoir belongs to low-porosity, special low-permeability reservoirs of which the average porosity is 9.26% and the average penetration rate is 1.273;3×10^-3μm^2. The sedimentation, diagenesis, and tectonic are the main controlling factors of the present reservoir distribution pattern in the second member of Xujiahe Formation in this area. The sedimentary microfacies control reservoir sand types and distribution. The diagenesis dominates the physical properties of reservoir and the tectonic improve the reservoir greatly.

关 键 词：须家河组二段 储层特征 影响因素 四川盆地 

分 类 号：P618.130.2[天文地球—矿床学]