渤海海域石南陡坡带多期砂砾岩扇体识别与展布特征  

Identification and description of the multi-stage sandy conglomerate fan body in Shinan Steep Slope Zone,Bohai Sea

作　　者：周晓光 黄晓波 王启明 马正武 陈丽祥 ZHOU Xiaoguang;HUANG Xiaobo;WANG Qiming;MA Zhengwu;CHEN Lixiang(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC(China),Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300452

出　　处：《东北石油大学学报》2020年第2期46-55,I0004,共11页Journal of Northeast Petroleum University

基　　金：国家科技重大专项(2016ZX05024-023)。

摘　　要：根据钻井、测井和三维地震等资料,建立渤海海域石南陡坡带多期砂砾岩扇体沉积成因模式,采用时频分析技术,结合井震识别标志,划分砂砾岩扇体沉积期次;利用瞬时相位处理和沉积演化模拟方法,精细刻画每期砂砾岩扇体展布特征。结果表明:石南陡坡带发育4期砂砾岩扇体,从早期到晚期总体具有持续性后退、范围缩小的特征。不同期次扇体展布规律存在差异,陡坡带中西部发育4期砂砾岩扇体,展布范围较大,东部发育3期扇体,展布范围较小。研究区西部、中部和东部的扇三角洲前缘没有叠置,砂砾岩扇体之间连通性较差。石南陡坡带有2个主力油层,分别为第3、第4期砂砾岩扇体。该结果为类似低勘探程度区油气勘探开发提供参考。In order to define the distribution characteristics of sandy conglomerate fan body in the Shinan Steep Slope Zone of the Bohai Sea Area,according to the data of drilling,logging and three-dimensional earthquake,the sedimentary genetic model of glutenite fans is established,and the sedimentary periods of glutenite fans are divided by using time frequency analysis technology and well seismic identification marks;instantaneous phase processing method and sedimentary evolution simulation method are used to accurately depict each stage of glutenite fans spread the border.The results show that there are four stages of sandy conglomerate fan body in the Shinan Steep Slope Zone,which have the characteristics of continuous retreat and narrow range from early to late.There are differences in the distribution of fans in different periods.There are four stages of glutenite fans in the middle and west of the steep slope zone,with a large range of distribution.There are three stages of fans in the east,with a small range of distribution.The fan delta front in the west,middle and east of the study area are not superposed,and the connectivity between glutenite fans is poor.It is clear that there are two main reservoirs in this area,namely,the fourth stage sandy conglomerate fan body and the third stage sandy conglomerate fan body.The results of this study provide a reference for oil and gas exploration and development in similar areas with low degree of exploration.

关 键 词：渤海海域 石臼坨凸起 砂砾岩扇体 沉积期次划分 扇体边界刻画 沉积成因分析 时频分析 瞬时相位 

分 类 号：TE121.2[石油与天然气工程—油气勘探]