鄂尔多斯盆地华庆地区长9储层微观孔隙结构特征  

Micro pore structure characteristics of Chang 9 reservoir in Huaqing area,Ordos Basin

作　　者：李百强[1] 邱雅洁[1] 李洋[1] 张涛[2] 郭艳琴[1] 王勇[3] 

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]长庆油田勘探部,陕西西安710021 [3]青海油田公司英东采油厂,甘肃敦煌736202

出　　处：《西安石油大学学报（自然科学版）》2015年第5期10-15,6,共6页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学重点基金项目(编号:41330315);国家油气重大专项(编号:2011ZX05005-004-08HZ);陕西省自然基础研究计划项目(编号:2013JQ5009)

摘　　要：为了查明鄂尔多斯盆地华庆地区长9油层组的微观特征,利用铸体薄片、扫描电镜、毛细管压力曲线等资料对储层微观孔隙结构进行深入研究。研究认为:华庆地区长9油层组以长石砂岩和岩屑长石砂岩为主,填隙物主要为胶结物,其中以铁方解石、浊沸石、伊利石和绿泥石为主;孔隙类型主要为原生残余粒间孔、溶蚀粒间孔、溶蚀粒内孔和自生矿物晶间微孔隙。依据毛细管压力曲线及孔隙特征将孔隙结构划分为5种类型:Ⅰ类(低门槛压力-中细喉型)、Ⅱ类(较低槛压力-细喉型)、Ⅲ类(较高门槛压力-微细喉型)、Ⅳ类(较高门槛压力-微喉型)、Ⅴ类(高门槛压力-微喉型)。For determining the micro characteristics of Chang 9 reservoir in Huaqing area,the micro pore structure characteristics are studied based on the data analysis of casting slices,scanning electrion microscope and capillary pressure curves,et al. The study results show that the rock types of Chang 9 reservoir in Huaqing area are mainly feldspathic sandstone and debris feldspathic sandstone,the pore were mainly filled with cements,of which the main types are iron calcite,laumontite,illite and chlorite. The pore types are mainly primary residual intergranular pore,intergranular dissolved pore,intragranular dissolved pore and authigenic intergranular micropores. The pore structure is divided into five types according to the capillary pressure curves and pore characteristics: Type I has low threshold pressure and medium-fine throat; Type II has lower threshold pressure and fine throat; Type III has high threshold pressure and micro fine throat; Type IV has higher threshold pressure and micro throat; Type V has high threshold pressure and micro throat.

关 键 词：孔隙结构 长9油层组 华庆地区 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]