鄂尔多斯盆地姬塬地区长2油层组砂岩储层特征的研究

Characteristics of Sandstone Reservoir of Chang-2 Oil Layer in the Jiyuan Area,Ordos Basin

依据相关的钻井资料,结合岩心、薄片分析等研究方法,对鄂尔多斯盆地中西部姬塬地区三叠系延长组长2油层组砂岩的储层特征以及相应的影响因素进行了探讨,研究结果得出:姬塬地区长2油层组砂岩以长石砂岩、岩屑长石砂岩为主,含有少量的长石岩屑砂岩等;研究区储层空间主要为粒间孔、长石溶孔、晶间孔、岩屑溶孔等,属于近中孔-低渗型的储层;成岩作用是该区储层发育最主要的影响因素,其中成岩过程中压实作用、胶结作用和溶解作用对储集空间有较大的影响。

This deals with reservoir characteristics and their influence factors of sandstone reservoir of Chang-2 oil layer in the Jiyuan area, Ordos basin based on logging data, core and thin section study. The study indicates that sandstone reservoir of Chang-2 oil layer in the Jiyuan area consists mainly of arkose and lithic arkose and small amount of feldspar lithic sandstone and is characterized by medium porosity and low permeability with intergranular pore, solution pore and intercrystal pore as reservoir space. The reservoir property depends on compaction, cementation and solution during the diagenesis.