苏里格大气田多成因河道砂体的分布模式研究  

Model of the distribution of the ploygenetic channel sand body of Sulige large gas field

作　　者：谢庆宾[1,2] 孙建 陈菁萍[4] 刘明洁[1] 李洋[1] 李进步[5] 张吉[5] 梁新平[1] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石油大港油田采油三厂地质所,河北沧县061035 [4]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011 [5]中国石油长庆油田分公司苏里格气田研究中心,陕西西安710018

出　　处：《地学前缘》2013年第2期40-51,共12页Earth Science Frontiers

基　　金：国家科技重大专项课题"鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程"(2008ZX05044)

摘　　要：以鄂尔多斯盆地苏里格大气田二叠系下石盒子组盒8段河道砂体为研究对象,开展盒8段河道砂体成因类型及分布模式的研究。详细的岩心观察和相标志研究表明,盒8下段为辫状河砂体,盒8上段为曲流河砂体,局部发育网状河砂体。岩性、岩相与砂体的含气性的关系密切,含气砂体与砂岩中的粗岩相单元有良好的对应关系,粗岩相主要发育在高能辫状水道、心滩及曲流河下部边滩内。河道砂体分布模式研究表明,盒8下段发育高能辫状河砂体与低能辫状河砂体模式,盒8上段具有北部网状河、南部曲流河的分布模式。By researching the channel sandbody in the He^8 Member of Lower Shihezi Formation of Permian System in Sulige large gas field in Ordos Basin, the genetic types and distribution patterns of channel sandbody in He-8 Member has been established. Through analyzing detailed core observation and symbols of sedimentary facies, it was concluded that the sedimentary environment in the area is braid river deposit in the lower section of the He-8 Member, while it is mandering river deposit in the upper section of the He-8 Member. It is anastomosed river deposit in some local area. The lithology and lithofacies of the sandbody are closely related to its gas-bearing property, and the gas-bearing sandbody have good correspondence with the coarse lithofacies units. The coarse lithofacies were mainly developed both in high-energy braid channel and its central bar and the lower part of point bar of the meandering river. According to the study of the channel sandhody distribution pattern, we have found that there are the high energy braid channels and low-energy braid channels in the lower section of the He-8 Member, and the anastomosed river in the north and mandering river in the south in the upper section of the He-8 Member.

关 键 词：鄂尔多斯盆地 苏里格气田 二叠系石盒子组 多成因河道砂体 分布模式 

分 类 号：P618.130.2[天文地球—矿床学]