摘要
通过铸体薄片、扫描电镜、岩心物性分析、测井资料等,对环江油田长8储层特征进行研究表明:该层段储层岩石类型主要以岩屑长石砂岩为主,成分成熟度低、结构成熟度高;岩石物性总体较差,属于低孔、低渗储层,发育粒间溶孔、长石溶孔、晶间孔及徽裂缝,喉道类型以小孔细喉型和细小孔微细喉型为主;沉积作用发生后,成岩作用控制着储层孔隙结构特征及储层物性。根据岩石类型、孔隙类型、压汞参数及物性分析等资料,将该区储层分为四类,其中研究区以Ⅱ、Ⅲ类储为主。
The characteristics of Chang-8 reservoir in Huanjiang region were investigated by the date of cast image analysis, scan- ning electron microscope, core physical properties analysis, log, etc. The results showed that the main rock type of the reservoir was lithic arkose, which was characterized by low composition maturity and high textural maturity. The physical properties of the rock were relatively poor, belonging to low porosity and extremely low permeability. There were developed intergranular dissolution pores, feldspar solution pores, intercrystal pores and micro-fracture. The main throat types were predominated by fine-throat and micro-throat. After sedimentation, the diagenesis controlled the physical and texture of porosity. Based on the data such as rock types, pore types, mercury injection parameters and physical properties analysis, the reservoir could be divided into 4 levels. Among them, researches took level Ⅱ and Ⅲ as the main parts.
出处
《油气藏评价与开发》
2012年第5期6-10,20,共6页
Petroleum Reservoir Evaluation and Development
关键词
环江地区
三叠系
储层特征
储层评价
长8油层组
Huanjiang region, Triassic, reservoir characteristics, reservoir evaluation, Chang-8 oil reservoir
