中国石油勘探 ›› 2020, Vol. 25 ›› Issue (4): 22-30.DOI: 10.3969/j.issn.1672-7703.2020.04.003

• 勘探案例 • 上一篇    下一篇

珠江口盆地惠州凹陷新领域勘探重大发现及意义

田立新1 ,施和生2 ,刘杰1 ,张向涛1 ,刘军1 , 代一丁1   

  1. 1 中海石油(中国)有限公司深圳分公司;2 中海石油(中国)有限公司勘探部
  • 出版日期:2020-07-14 发布日期:2020-07-14
  • 基金资助:
    中海石油(中国)有限公司生产科研项目“惠州26 洼南缘古近系源汇体系及规模优质储层研究”(CCL2020SZPS0148)。

A major discovery and the significance of new frontier exploration in the Huizhou sag, Pearl River Mouth Basin

Tian Lixin1, Shi Hesheng2, Liu Jie1, Zhang Xiangtao1, Liu Jun1, Dai Yiding1   

  1. 1 Shenzhen Branch of CNOOC (China) Co., Ltd.; 2 Exploration Department of CNOOC (China) Co., Ltd.
  • Online:2020-07-14 Published:2020-07-14
  • Supported by:
     

摘要: 珠江口盆地惠州凹陷是南海东部石油工业的摇篮,也是珠江口盆地( 东部) 最早取得中深层古近系油气 突破的地区。近10 年惠州凹陷勘探遭遇瓶颈,为了寻找新的大中型油气田,开展研讨和加强石油地质条件再评价工 作。通过转变思路,坚定“老油区新作为”的勘探信心,提出“立足富洼、聚焦古近系—古潜山、拓展新领域”的勘 探理念;加强研究攻关,提出富油洼陷找气新认识,惠州26 洼湖相混合型母质“油气兼生,晚期快速生气”,具有 较大天然气资源潜力;提出环惠州26 洼“古近系—古潜山”圈闭群具有“近源强势供烃、立体网状输导”成藏模式, 是勘探转型、新领域突破的首选区带。近期该区带惠州26-6“古近系—古潜山”大中型油气田勘探突破证实了高成 熟富油洼陷找气新方向,揭开了惠州凹陷“古近系—古潜山”勘探新篇章,极大拓展了珠江口盆地(东部)古潜山勘 探新领域。

 

关键词: 惠州凹陷;大中型油气田;勘探转型;富油洼陷找气;&ldquo, 古近系&mdash, 古潜山&rdquo, 新领域突破

Abstract: The Huizhou sag in the Pearl River Mouth Basin is the ‘cradle’ of the petroleum industry in the eastern South China Sea, and also the breakthrough area for oil and gas discoveries in the middle-deep Paleogene in the eastern Pearl River Mouth Basin. For the past 10 years, however, exploration in the Huizhou sag has been trapped in a bottleneck. In order to discover new large-medium oil and gas fields, it is necessary to hold workshops and strengthen the re-evaluation work of petroleum geological conditions to bolster confidence in the exploration idea of “new achievements in mature areas”. Now, a new exploration concept is now proposed: “taking oil-rich sub-sags as a basis, focusing on Paleogene-buried hills, and expanding to new frontiers”. With increased research, new understandings of gas exploration in oil-rich sub-sags are emerging. In the Huizhou 26 sub-sag, mixed-type kerogens of lacustrine facies are characterized by “generation of both oil and gas, and rapid gas generation in the late stage” and offer great potential for natural gas resources. The “Paleogene-buried hills” trap group around the Huizhou 26 sub-sag has a hydrocarbon accumulation model of “strong near-source hydrocarbon supply and stereoscopic network migration”, making it the preferred zone for exploration transformation and new-field breakthroughs. The recent breakthrough discovery of a large-medium oil and gas field in the “Paleogene-buried hill” area of the Huizhou 26-6 structure—confirms this new target of gas exploration in high mature oil-rich sub-sag, opens a new chapter of “Paleogene-buried hill” exploration in the Huizhou sag, and expands the new exploration field of paleo-buried hills in the eastern Pearl River Mouth Basin.

Key words: Huizhou sag, large-medium oil and gas field, exploration transformation, gas exploration in oil-rich sub-sag, new frontier breakthrough in &ldquo, Paleogene-buried hills&rdquo

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