渤南低凸起东段明下段砂体差异发育特征及勘探意义  

Differential Development Characteristics and Exploration Significance of Sand-bodies in Lower Member of Minghuazhen Formation in Eastern Section of Bonan Low Uplift

作　　者：周晓光 曾萱 郑江峰 王粤川 赵志平 ZHOU Xiaoguang;ZENG Xuan;ZHENG Jiangfeng;WANG Yuechuan;ZHAO Zhiping(Tianjin Branch,CNOOC(China)Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《西安石油大学学报(自然科学版)》2025年第1期11-17,共7页Journal of Xi’an Shiyou University(Natural Science Edition)

基　　金：中国海洋石油有限公司“十四五”重大科技项目“地层岩性油气藏高效识别与精细评价技术”(KJGG2022-0303)。

摘　　要：针对渤南低凸起东段明下段主力勘探层系砂体展布规律认识不清的问题,综合运用录井资料、测井资料、分析化验资料和地震资料等开展研究。结果表明:渤南低凸起东段明下段发育1个中期旋回(对应低位体系域、湖侵体系域和高位体系域)和5个短期旋回(对应划分了5个油层组),富砂储层主要发育在低位体系域中的Ⅴ油层组和高位体系域中的Ⅱ油层组。Ⅴ油层组砂体展布受东部物源体系的影响,主要发育河道型砂体和席状型砂体;Ⅱ油层组砂体分布受西部物源体系影响,主要发育河道型砂体、河口坝型砂体和席状型砂体。明下段Ⅴ油层组勘探重点区带在东北部,明下段Ⅱ油层组勘探重点区带在西北部。The lower member of Minghuazhen Formation in the eastern section of Bonan low uplift is main exploration layer,but the distribution law of sand-bodies is not clear,which restricts the effectiveness of oil and gas exploration.The logging data while-drilling,logging data,analytical test data and seismic data are comprehensively studied.The results show that there are one medium-term cycle(corresponding to lowstand system tract,transgressive system tract and highstand system tract)and five short-term cycles(corresponding to five oil layer groups)in the lower member of Minghuazhen Formation in the eastern section of Bonan low uplift.The sand-rich reservoirs are mainly developed in the V oil layer group of the lowstand system tract and the II oil layer group of the highstand system tract.The distribution of sand bodies in the V oil layer group of the lower member of Minghuazhen formation is mainly affected by the eastern source system,channel-type sand bodies and sheet-type sand bodies are developed.The distribution of sand bodies in the II oil layer group is mainly affected by the western source system,mainly developing channel-type sand bodies,estuary dam-type sand bodies and sheet-type sand bodies.It is proposed that the key exploration area of the V oil layer group is in the northeast,and the key exploration area of the II oil layer group is in the northwest.

关 键 词：渤南低凸起 短期旋回 砂体发育差异性 河道型砂体 河口坝型砂体 

分 类 号：TE122[石油与天然气工程—油气勘探]