摘要
综合分析岩心、砂体形态、沉积微相组合特征、粒度等,认为渤海湾垦利3油田明化镇组下段B砂体为指状砂坝型浅水三角洲沉积。利用分辨率更高的电测曲线识别沉积间断面,分析砂体韵律变化特征,确定沉积期次。再根据构型解剖结果及沉积微相分布特征,详细剖析砂体的沉积演化过程,在古地理环境水退、水进的变化中,三角洲经历发育-沉积间断-再发育的多个循环过程,最终形成目前的砂体形态。
Based on the comprehensive analysis of core,sand body morphology,sedimentary microfacies combination characteristics and grain size,it is heid that B sand body in the lower member of Minghuazhen Formation of Kenli 3 oilfield in Bohai Bay is a finger bar type shoal water delta deposit.The sedimentary discontinuities are identified by using the electrical logging curves with higher resolution,and the sedimentary periods are determined by analyzing the rhythm variation characteristics of sand bodies.According to the results of structural anatomy and the distribution characteristics of sedimentary microfacies,the sedimentary evolution process of the sand body is analyzed in detail.It is shown that in the change of paleogeographic environment,the delta experienced multiple cycles of development,sedimentary discontinuity and redevelopment,and finally formed the current sand body shape.
作者
朱建敏
刘宗宾
宋洪亮
刘东
王立垒
ZHU Jianmin;LIU Zongbin;SONG Hongliang;LIU Dong;WANG Lilei(Tianjin Branch,CNOOC (China) Limited,Tianjin 300459,China)
出处
《西安石油大学学报（自然科学版）》
北大核心
2021年第5期27-33,共7页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)。
关键词
分流河道
河口坝
单砂体沉积演化
浅水三角洲
渤海油田
distributary channel
estuary dam
single sand body sedimentary evolution
shoal water delta
Bohai oilfield
