岩性油气藏 ›› 2022, Vol. 34 ›› Issue (2): 95–104.doi: 10.12108/yxyqc.20220209

• 地质勘探 • 上一篇    下一篇

恩平凹陷南带中新统河流-波浪联控沉积体系及其意义

张晓钊1, 吴静1, 彭光荣1, 许新明1, 郑小波2   

  1. 1. 中海石油(中国)有限公司 深圳分公司, 广东 深圳 518054;
    2. 中国地质大学(武汉)资源学院, 武汉 430074
  • 收稿日期:2021-08-12 修回日期:2021-12-22 出版日期:2022-04-01 发布日期:2022-03-14
  • 作者简介:张晓钊(1986-),男,硕士,工程师,主要从事储层预测和地震沉积方面的研究工作。地址:(518054)广东省深圳市南山区后海滨路3168号。Email:zhangxzh31@cnooc.com.cn。
  • 基金资助:
    “十三五”国家科技重大专项“南海东部海域勘探新领域及关键技术”(编号:2016ZX05024-004)、中海油深圳分公司生产性科研项目“珠江口盆地(东部)浅水区早—中中新世(T60—T35)精细沉积相及多成因岩性圈闭潜力”(编号:SCKY-2021-SZ-05)联合资助

Miocene river-wave dominated sedimentary system in south belt of Enping Sag and its significance

ZHANG Xiaozhao1, WU Jing1, PENG Guangrong1, XU Xinming1, ZHENG Xiaobo2   

  1. 1. Shenzhen Branch, CNOOC China Limited, Shenzhen 518054, Guangdong, China;
    2. Faculty of Resources, China University of Geosciences(Wuhan), Wuhan 430074, China
  • Received:2021-08-12 Revised:2021-12-22 Online:2022-04-01 Published:2022-03-14

摘要: 恩平凹陷南带是油气有利富集区,具有发育岩性圈闭的沉积背景,但由于该区岩性油藏勘探起步较晚,对其形成的岩性圈闭条件的研究不够深入,制约了岩性圈闭勘探进展。为了落实恩平凹陷南带岩性圈闭的发育条件及勘探潜力,在高精度层序格架和沉积充填序列的基础上,应用测井、岩心和地震资料,对该区河流-波浪联控体系沉积特征、沉积相展布及演化规律进行了分析,进而解剖河流-波浪联控体系下砂体的识别标志、分布规律及岩性圈闭发育特征。结果表明:恩平凹陷南带中新统发育河流-波浪联控的三角洲沉积体系,EP1,EP2和EP3油区为岩性圈闭发育有利区,韩江组五、六段和珠江组一段为岩性圈闭发育的有利层段,波浪改造砂岩为岩性圈闭的主要储集体。该研究成果对恩平凹陷南带岩性勘探具有指导作用。

关键词: 河流-波浪联控体系, 高精度层序, 岩性圈闭, 韩江组, 珠江组, 中新统, 恩平凹陷

Abstract: The south belt of Enping Sag is a favorable oil and gas enrichment area with a sedimentary background of developing lithologic traps. However, the exploration of lithologic reservoirs in this area stared relatively late, the understanding of lithologic traps is not enough, which restricts the progress of lithologic trap exploration. In Sag, based on high-precision sequence framework and sedimentary filling sequence, the sedimentary characteristics, sedimentary facies distribution and evolution law of river-wave dominated system were analyzed by using logging, core and seismic data, and then the identification marks, distribution law and development characteristics of lithologic traps of sand bodies under river-wave dominated system were dissected. The results show that river-wave dominated delta sedimentary system is developed in the Miocene in the south belt of Enping Sag, EP1, EP2 and EP3 oil areas are favorable areas for lithologic trap development, the fifth and sixth members of Hanjiang Formation and the first member of Zhujang Formation are favorable zones for lithologic trap development, and wave-reformed sandstone is the main reservoir of lithologic traps. The research results play a guiding role in lithologic exploration in south belt of Enping Sag.

Key words: river-wave dominated system, high-precision sequence, lithologic trap, Hanjiang Formation, Zhujiang Formation, Miocene, Enping Sag

中图分类号: 

  • TE122
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