西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (3): 43-51.DOI: 10.11885/j.issn.1674-5086.2016.11.05.01

• 地质勘探 • 上一篇    下一篇

砂岩在西湖凹陷花港组交互式盖层中的作用初探

赵洪1, 秦兰芝1, 王辉2, 李宁1, 李宣玥1   

  1. 1. 中海石油(中国)有限公司上海分公司, 上海 徐汇 200030;
    2. 中国石油勘探开发研究院, 北京 海淀 100083
  • 收稿日期:2016-11-05 出版日期:2018-06-01 发布日期:2018-06-01
  • 通讯作者: 赵洪,E-mail:zhaohong910@163.com
  • 作者简介:赵洪,1979年生,男,汉族,山东德州人,工程师,博士,主要从事石油地质勘探研究工作。E-mail:zhaohong910@163.com;秦兰芝,1983年生,女,汉族,青海乐都人,高级工程师,硕士,主要从事沉积储层方面的研究工作。E-mail:qinlzh2@cnooc.com.cn;王辉,1979年生,女,汉族,湖北松滋人,工程师,硕士,主要从事沉积及油气成藏等方面的研究工作。E-mail:476390364@qq.com;李宁,1983年生,男,汉族,安徽巢湖人,工程师,硕士,主要从事油气资源勘探与目标综合评价的研究工作。E-mail:lining2@cnooc.com.cn;李宣玥,1988年生,女,浙江丽水人,工程师,硕士,主要从事石油地质研究工作。E-mail:rebecca5291@163.com
  • 基金资助:
    国家科技重大专项(2016ZX05027001);中海石油(中国)有限公司科研项目(YXKY-2017-SH-01)

Preliminary Investigation on the Role of Sandstones in Interacting Caprocks of the Huagang Formation in the Xihu Depression

ZHAO Hong1, QIN Lanzhi1, WANG Hui2, LI Ning1, LI Xuanyue1   

  1. 1. Shanghai Branch of CNOOC Ltd., Xuhui, Shanghai 200030, China;
    2. Petrochina Research Institute of Petroleum Exploration & Development, Haidian, Beijing 100083, China
  • Received:2016-11-05 Online:2018-06-01 Published:2018-06-01

摘要: 西湖凹陷花港组盖层具有砂泥岩交互式发育特征,而与泥岩伴生的砂岩类盖层的油气封闭作用研究较少。采用岩芯、镜下观察及压汞等分析方法,对砂泥岩交互式盖层中的砂岩特征进行了分析。结果表明,盖层中的砂岩可作为有效盖层,砂岩类盖层早期受沉积环境控制,含有较多的泥质而导致早期压实作用较强,加之晚期的黏土矿物转换及胶结物的发育,具备形成良好盖层的条件。在不同地区进行砂岩盖层有效性研究时应以沉积环境为基础,针对不同类型的砂岩进行成岩作用研究,并针对不同类型的砂岩样品进行实验分析以明确砂岩盖层的有效性。

关键词: 西湖凹陷, 花港组, 砂岩盖层, 成岩作用, 突破压力

Abstract: Interactions between sandstone and mudstone are present in the developmental characteristics of caprocks of the Huagang Formation in the Xihu Depression, but studies on the role of mudstone-associated sandstone-type caprocks in the sealing of petroleum are relatively scarce. The characteristics of sandstones within interactive sandstone-mudstone caprocks were analyzed using rock cores, microscopic observations, and mercury intrusion porosimetry. The results show that sandstones within the caprock are able to act as an effective seal (caprock). Sandstone-type caprocks are controlled by their sedimentary environment during early periods, and their high argillaceous mineral content led to strong compaction during these periods. The addition of clay mineral transformation and cement development in later periods imbued these rocks with the conditions necessary for the formation of a highly effective caprock. The sedimentary environment of caprocks should be the foundation for studies on the effectiveness of sandstone caprocks in different regions, and diagenetic studies should be performed on the various sandstones present. In addition, experimental analyses should be conducted on different types of sandstone samples to determine the effectiveness of sandstone caprocks.

Key words: Xihu Depression, Huagang Formation, sandstone caprocks, diagenesis, breakthrough pressure

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