石油与天然气地质 ›› 2024, Vol. 45 ›› Issue (4): 1018-1031.doi: 10.11743/ogg20240409
陈琰1,2(), 张永庶1,2, 徐兆辉1,2,3(), 姜营海1,2, 朱超4, 张静1,2, 张彩燕1,2
收稿日期:
2024-01-10
修回日期:
2024-06-16
出版日期:
2024-09-05
发布日期:
2024-09-05
通讯作者:
徐兆辉
E-mail:licqh@petrochina.com.cn;zhaohui.xu@petrochina.com.cn
第一作者简介:
陈琰(1972—),女,博士、教授级高级工程师,油气地质勘探。E-mail:licqh@petrochina.com.cn。
Yan CHEN1,2(), Yongshu ZHANG1,2, Zhaohui XU1,2,3(), Yinghai JIANG1,2, Chao ZHU4, Jing ZHANG1,2, Caiyan ZHANG1,2
Received:
2024-01-10
Revised:
2024-06-16
Online:
2024-09-05
Published:
2024-09-05
Contact:
Zhaohui XU
E-mail:licqh@petrochina.com.cn;zhaohui.xu@petrochina.com.cn
摘要:
柴达木盆地西部干柴沟地区历经60余年勘探未获重大油气发现。2019年以来,通过强化山地三维地震勘探技术攻关和深化高原咸化湖相混积型碳酸盐岩成储、成藏研究,油气勘探终获突破,发现了古近系下干柴沟组构造油气藏,同时英雄岭页岩油和湖相碳酸盐岩岩性油气藏勘探也展现出良好前景。研究成果主要得益于以下几点:①高品质三维地震资料揭示干柴沟地下构造形态,发现东翼发育断背斜,为油气聚集提供了有利圈闭条件;②大面积咸化湖相混积碳酸盐岩具备储集能力,碎屑岩、湖相碳酸盐岩和膏盐岩层在纵、横向上均呈有序分布,构成了良好的生-储-盖组合;③基于全油气系统理论,认为研究区常规油气(源外)和非常规油气(源内)立体成藏。剖析干柴沟地区油气勘探历程发现:①地震勘探技术进步是干柴沟复杂构造区地下构造圈闭得以落实和油气地质特征得以揭示的基础;②干旱咸化湖盆发育的大面积混积碳酸盐岩不仅是烃源岩而且具备储集能力,这一认识拓展了勘探领域,是勘探取得突破的关键;③全油气系统理论的引入,推动油气勘探向源内拓展,揭示了英雄岭页岩油的良好勘探前景。
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