英旺油田三叠系延长组长8油层组储层特征

根据铸体薄片、扫描电镜、岩心分析、测井资料，对英旺油田长8储层特征进行的研究结果表明：该层段储层岩石类型主要为长石砂岩及岩屑长石砂岩，成分成熟度低，结构成熟度高；岩石物性总体较差，属低孔、特低渗储层，发育粒间溶孔、剩余粒间孔、粒内溶孔等孔隙类型，喉道以细喉-微喉为主；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。根据岩性和物性特征，该区储集岩分为3类：Ⅰ类为好储集层，Ⅱ类为较好储集层，Ⅲ类为较差储集层。

Characteristics of Reservoir Chang 8 in Triassic Yanchang Formation in Yingwang Oil Field

The characteristics of Chang 8 reservoir in Yingwang oil field were investigated by the data of cast image analysis,scanning electron microscope,core analysis and log.It was shown that the rock types of the reservoir are arkose and lithic arkose,which are characterized by low composition maturity and high textural maturity.The physical properties of the rock are relatively poor,belonging to low porosity and extremely low permeability.There are the developed intergranular dissolution pore,residual intergranu...