渭北油田渭北2井区长3油藏储层特征研究

Researching Reservoir Characteristics of Long 3 for 2 River of Weibei Oil Field

渭北油田位于鄂尔多斯盆地伊陕斜坡和渭北隆起交汇处的两个一级构造单元上,沉积体系主要为东北和南部发育的辫状河三角洲-湖泊沉积。通过在实验室的岩心和薄片观察分析,了解了沉积的岩石学特征、物性特征、孔隙结构特征。表明;渭北2井区砂岩储层孔隙的分类类型为细砂结构为主,分选较好,胶结类型为接触-孔隙式胶结。储层储集空间主要为溶蚀粒间孔到微孔隙组成的复合孔储层。按照鄂尔多斯盆地伊陕斜坡南部长3储层分类评价标准,可划分为中孔中细喉道储层。

Weibei oil field is located in the ordos basin of Yishan slope and the uplift of weibei uplift interchange of two first - order tectonic units. Sedimentary system mainly comes from the block of the development of northeast and south of the braided river delta - lacustrine sediments. Through observation thin section and core physical property analysis experiment, characteristics of petrology characteristics, physical properties and pore structure characteristics are analyzed. Showing; wellblock of weibei2 river sandstone reservoir pore types, mainly very fine - fine structure, good separation, contact - pore type cementation. Reservoir reservoir space is mainly composite hole by dissolution intergranular pore, primary intergranular pore and micropore, Type belongs to the hole in the thin throat. Reference to yishan slope of the south ordos basin Long 3 reservoir classification evaluation division.