摘要
老爷庙油田位于河北省唐海县老爷庙村 ,是冀东油田的主力油田之一。构造位置位于渤海湾盆地黄骅坳陷南堡凹陷西北部。根据分析沉积岩岩石成分和结构特征、泥岩颜色、沉积构造和岩相组合特征等沉积相标志 ,结合东营组东一段沉积时期西南庄断层下降盘倾斜的古地形背景以及西南庄和老王庄凸起古物源的古地理位置 ,将老爷庙油田古近系东营组东一段确定为扇三角洲沉积环境 ,并划分了主要的沉积微相类型 ,包括扇三角洲水下分流河道、河口坝和支流间湾微相 ,并对每类沉积微相的特征进行了分析。在此基础上以测井相为基本手段 ,应用砂岩百分含量等值线图 ,勾绘了老爷庙油田古近系东一段沉积微相的平面分布 ,讨论沉积微相的演化。依据东一段沉积微相平面分布 ,结合岩心分析资料 ,确定水下分流河道是主要的储层微相 ,其孔隙度为 1 5 %～ 2 4 % ,渗透率 1 5 0× 1 0 -3 ～ 5 0 0× 1 0 -3 μm2 ,储层的物性较好。分流水道的游走摆动、沉积物的快速堆积、储层较低的分选性和强烈的非均质性是导致老爷庙油田东一段油藏开发效果差的根本地质因素。恢复东一段沉积微相 ,可以进一步弄清优质储层的分布规律 。
The Laoyemiao Oil Field is geographically located at the Laoyemiao Village,Tanghai County,Hebei Province,and tectonically located in the northwest of the Nanpu Sag in the Bohai Bay Basin It is one of the important oil fields in Ji Dong Oil Fields This paper analysed sedimentary characteristics such as rock composition and its texture,color of shale,sedimentary structure and lithofacies combinations,as well as the palaeotopography and palaeogeography of the Oil Field It was shown that the Member 1 of Dongying Formation of Paleogene in the Laoyemiao Oil Field was formed in a fan delta environment Main microfacies including the fan delta subaqueous distributary channel and mouth bar were divided,and the characteristics of each microfacies were analyzed as well Sedimentary facies map of the Member 1 of Dongying Formation in the Laoyemiao Oil Field was plotted with logging facies and isopachs of sandstone,and the evolution process of the microfacies was further analyzed According to microfacies map and core analysis data,subaqueous distributary channel was believed to be the main reservoir microfacies,whose porosity is 15%～24% and permeability is 150×10 -3 ～500×10 -3 μm 2 For the Dongying Formation reservoir in the Laoyemiao Oil Field,the distribution scope of subaqueous distributary channel,low reservoir sorting and strong heterogeneity are the main geological factors for low development effect And as a result,excellent reservoir can be forecasted by reconstructing microfacies and oil field development plan can be adjusted accordingly
出处
《古地理学报》
CAS
CSCD
2004年第2期174-181,共8页
Journal of Palaeogeography：Chinese Edition
基金
教育部 973重大基础研究前期研究专项基金 ( 2 0 0 2CCA0 0 70 0 )资助
国际科技合作重点项目 (编号 2 0 0 2CB713 90 6)资助研究成果
