济阳坳陷石炭二叠系储层特征及其沉积控制  

Reservoir Characteristics and Their Depositional Control of the Permo-Carboniferous in Jiyang Depression

作　　者：韩会军[1] 刘华[1] 刘长江[2] 黄华州[2] 

机构地区：[1]中国科学院广州地球化学所 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《中国矿业大学学报》2007年第4期522-526,共5页Journal of China University of Mining & Technology

基　　金：国家油气专项资助项目(XQ-2004-03)

摘　　要：以钻遇石炭二叠系的100余口探井录井、测井资料为基础，结合岩心样品的薄片、铸体薄片、扫描电子显微镜等岩石学分析和连通孔隙度、渗透率等物性测试，研究了石炭二叠系储层的地层赋存和岩性等发育特征，查明了主力储层的保存与展布，揭示了石炭二叠系砂岩储层的孔隙类型及其空间分布、孔隙度与渗透率的变化，探讨了沉积相对砂岩储层展布及物性的控制作用．研究表明：石炭二叠系储集层主要是上石盒子组、下石盒子组砂（砾）岩；主要分布于惠民凹陷、东营凹陷和沾化凹陷的孤北地区，上石盒子组砂体分布范围不及下石盒子组砂体，但储层厚度要大；砂岩储层孔隙类型存在7种类型，以次生溶蚀孔隙为主；砂岩储层孔隙度均值为10．0％，渗透率均值为0．02×10^-3～47．5×10^-3μm^2，属低孔低渗型；砂岩储层展布因残留地层分布制约与沉积相关系不密切，但砂岩储层物性随沉积相不同出现规律性变化．Based on the data of more than one hundred exploration wells and logging wells of the Permo-Carboniferous in Jiyang region, combined with petrologic analyses including thin sections, mold sections, scanning electron microscopy（SEM）, and property tests including interconnected porosity and permeability of core samples, the reservoir characteristics concerning stratigraphical occurrence and lithology of the Permo-Carboniferous were studied. The conservation and distribution of major reservoirs, the pore types and their spacial distribution, variation of porosity and permeability of the Permo-Carboniferous sandstone reservoirs, and the control of sedimentary facies on the distribution and properties of the sandstone reservoirs were investigated. The results show that Permo-Carboniferous reservoirs are mostly sandstones and conglomerates in the Upper-Shihezi and Lower-Shihezi formation, which mainly distribute in Gubei region of Huimin sag, Dongying sag, and Zhanhua sag. The sandbody of the Upper-Shihezi formation is of smaller scope but thicker than that of the Lower-Shihezi formation. There are seven kinds of pore types in sandstone reservoirs, of which the secondary solution pore is majority. As average porosity is 10% and average permeability is 0.02 × 10^-3～47.5×10^-3μm^2 , the sandstone reservoirs belong to low porosity and low permeability. The relationship between sandstone reservoir distribution and sedimentary facies is not close because of the restriction of the distribution of residual strata, but properties of sandstone reservoirs vary with sedimentary facies regularly.

关 键 词：储层 沉积控制 石炭二叠系 济阳坳陷 

分 类 号：P512.2[天文地球—地质学]