苏西W区块盒_8、山_1、山_2段储层综合评价

Comprehensive reservoir evaluation of He-8,Shan-1 and Shan-2 member in W block,the west of Sulige area

苏西W区块位于鄂尔多斯盆地伊陕斜坡西北部。通过对该区盒8、山1、山2段钻井、录井、测井和试气等资料的研究,利用岩心观察、铸体薄片、孔隙图像及扫描电镜等分析测试手段,从储层沉积特征、岩石学特征、物性特征、储集空间类型、孔隙结构和储层分类评价等方面综合评价该区盒8、山1、山2段储层。最终将区内储层划分为：Ⅰ类（好储层）、Ⅱ类（较好储层）、Ⅲa类（中等储层）、Ⅲb类（一般储层）、Ⅳ 类（差或非储层）。Ⅰ类~Ⅲb类储层中,Ⅲb类储层在平面分布最广,其次是Ⅱ类储层。

W block of western Sulige area lies in the northwest of Yishan slope, Ordos basin. Through the study in drilling data, logging data, well-logging data, testing data and so on, by means of core observation, casting thin sections, pore images, scanning electron microscope and other analytical testing means, the reservoir of He-8, Shan-1 and Shah-2 member are comprehensively evaluated in terms of sedimentary characteristics, petrologic features, physical property characteristics, types of reservoir spaces, pore texture, classification and evaluation of reservoir and so on in the study area. The reservoirs of this block are eventually divided into class I （good reservoir）, class II （better reservoir）, class Ilia （medium reservoir）, class IIIb （general reservoir）, and class IV （poor reservoir or none-reservoir）. The class IIIb reservoir has the most widely plane distribution, while the second place belongs to class II reservoir in class I -class IIIb reservoirs.