曲流河废弃河道走向判定与单砂体构型表征——以渤海湾盆地埕宁隆起石臼坨凸起西部新近系明化镇组下段为例  

Trend judgment of abandoned channels and fine architecture characterization in meandering river reservoirs: A case study of Neogene Minhuazhen Formation NmⅢ2 layer in Shijiutuo bulge, Chengning uplift, Bohai Bay Basin, East China

作　　者：牛博[1] 赵家宏[2] 付平[2] 李军建 鲍志东[1] 胡勇 苏进昌 高兴军[5] 张弛 于登飞 臧东升[1] 李敏 NIU Bo;ZHAO Jiahong;FU Ping;LI Junjian;BAO Zhidong;HU Yong;SU Jinchang;GAO Xingjun;ZHANG Chi;YU Dengfei;ZANG Dongsheng;LI Min(College of Geosciences,China University of Petroleum,Beijing 102249,China;Research Institute of Exploration and Development,PetroChina Jilin Oilfield Company,Songyuan 138001,China;No.5 Oil Production Plant,PetroChina Changqing Oilfield Company,Xi’an 710020,China;Bohai Oilfield Research Institute,CNOOC Tianjin Company,Tianjin 300452,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油吉林油田公司勘探开发研究院,吉林松原138001 [3]中国石油长庆油田公司第五采油厂,西安710200 [4]中海石油(中国)有限公司天津分公司,天津300452 [5]中国石油勘探开发研究院,北京100083

出　　处：《石油勘探与开发》2019年第5期891-901,共11页Petroleum Exploration and Development

基　　金：国家科技重大专项(2008ZX05030-005-01,2011ZX05004-004-007)

摘　　要：基于测井响应特征,结合沉积模式与砂体厚度,对渤海湾盆地埕宁隆起石臼坨凸起西部新近系明化镇组下段明三油层组第2小层古曲流河沉积砂体分布特征开展研究。针对目前废弃河道形态存在多解性的问题,探索出一种利用水平井电阻率曲线计算砂泥岩界面产状的方法,该方法利用随钻探测半径、界面倾角、曲线变化段长度之间的三角函数关系对砂泥岩界面产状进行定性定量计算,以确定废弃河道的真实走向,是对现有曲流河砂体构型解剖技术的补充与完善。利用经验公式、水平井等方法对研究区点坝内部侧积层倾角与侧积体规模进行定量研究,确定点坝内部侧积层的空间分布。利用界面搭建相关构型要素,采用非均匀粗化对侧积层、侧积体分别施加不同的网格密度,对研究区多点坝复合曲流河砂体进行精细三维构建,实现构型级别数值模拟的工业化应用。研究结果对油田剩余油分布预测和挖潜以及油田优化注水具有指导意义。Based on well logging responses,sedimentary patterns and sandstone thickness,the distribution characteristics of meandering river sedimentary sand body of Neogene Minghuazhen Formation NmⅢ2 layer in the west of Shijiutuo Bulge,Chengning Uplift,Bohai Bay Basin were investigated.A new approach to calculate the occurrence of the sand-mudstone interfaces using resistivity log of horizontal well was advanced to solve the multiple solution problem of abandoned channel’s orientation.This method uses the trigonometric function relationship between radius,dip and length of the resistivity log to calculate the occurrence qualitatively-quantitatively to help determine the true direction of the abandoned channels.This method can supplement and improve the architecture dissection technique for meandering river sandbodies.This method was used to study the dip angle and scale of the lateral accretion layers in point bar quantitatively to help determine the spatial distribution of lateral accretion layers.The fine architecture model of underground meandering river reservoir in the study area has been established.Different from traditional grids,different grid densities for lateral accretion layers and bodies were used in this model by non-uniform upscaling to establish the inner architecture model of point-bars and realize industrial numerical simulation of the whole study area.The research results can help us predict the distribution of remaining oil,tap remaining oil,and optimize the waterflooding in oilfields.

关 键 词：渤海湾盆地 曲流河 水平井电阻率曲线 侧积层 侧积体 构型建模 剩余油分布 

分 类 号：TE122.1[石油与天然气工程—油气勘探]