辫状河相储集层地质模型——“泛连通体”  

A braided river reservoir geological model—“pan communicated sandbody”.

作　　者：葛云龙[1,2] 逯径铁 廖保方[1,2] 李列 张为民[1,2] 闻兰 薛培华[1,2] 郭睿[1,2] 

机构地区：[1]华北石油职工大学 [2]中国石油天然气集团公司石油勘探开发科学研究院

出　　处：《石油勘探与开发》1998年第5期77-79,共3页Petroleum Exploration and Development

摘　　要：在大量野外工作基础上，总结了永定河（现代辫状河）的沉积特征：岩性粗，砂／泥比值高，具明显的正相序剖面特征；发育特征明显的落淤层；层理构造极为发育，类型却较为单调；辫状河砂体在时空上相互叠切，形成大面积分布的复合储集体。进而分析了辫状河相储集层的非均质特征，认为辫状河相储集层的层内和平面非均质性都很严重。在辫状河相沉积中可见到５个级次的沉积界面构造，即：一级冲刷面及二、三、四、五级沉积再作用面。提出了辫状河相储集层模式———“泛连通体”，其砂体规模大、连通网络广布，局部通而不畅乃至连而不通。中国许多油田开发的动态信息证实，这种辫状河储集层地质模式是成立的，对指导有效注水开发辫状河相储集层具有普遍意义。图４参９（邹冬平摘）Based on a large quantity of field work, depositional features of Yongding river (a modern braided river) are summarized in this paper, which are coarse lithology, high ratio of sand over shale obvious positive facies profile, well developed “sludge bed” and intensive bedding structures, but simple in type. Braided river sand bodies are superimposed each other in time and space, forming broadly distributed composite reservoirs. This kind of reservoirs have different feature of heterogeneity from the others, which is very strong intralayerly and laterally. Five orders of depositional surface structure can be found in braided river deposits, i. e. flush surface (first order interface), and the second, third, fourth and fifth reworking surfaces of deposits. A braided river reservoir model—“pan communicates body ” is proposed, which has been conformed by the performance of the oilfield development in China, and broadly significant for effectively waterflooding braided river reservoirs.

关 键 词：河相 储集层 地质模型 泛连通体 油气藏 

分 类 号：P618.130.2[天文地球—矿床学]