特种油气藏 ›› 2021, Vol. 28 ›› Issue (1): 67-73.DOI: 10.3969/j.issn.1006-6535.2021.01.009

• 地质勘探 • 上一篇    下一篇

南苏丹Melut盆地Ruman凹陷东斜坡稠油成藏机理及勘探潜力分析

薛罗1, 史忠生1, 马轮1, 赵艳军2, 陈彬滔1, 史江龙1, 王磊1   

  1. 1.中国石油勘探开发研究院西北分院,甘肃 兰州 730020;
    2.中油国际尼罗河公司,苏丹 喀土穆 10687
  • 收稿日期:2020-04-25 修回日期:2020-09-01 出版日期:2021-02-25 发布日期:2021-04-27
  • 通讯作者: 史忠生(1978—),男,高级工程师,2001年毕业于中国地质大学(武汉)资源勘查工程专业,2006年毕业于该校能源地质工程专业,获博士学位,现主要从事裂谷盆地石油地质与综合评价方面的研究工作。
  • 作者简介:薛罗(1988—),男,工程师,2010年毕业于中国地质大学(武汉)资源勘查工程专业,2013年毕业于该校能源地质工程专业,获硕士学位,现主要从事盆地模拟及油气成藏研究工作。
  • 基金资助:
    “十三五”中国石油重大科技项目“海外重点战略大区勘探技术研究与应用”(2019D-4306)

Analysis of Heavy Oil Accumulation Mechanism and Exploration Potential in the Eastern Slope of Ruman Sag in Melut Basin, South Sudan

Xue Luo1, Shi Zhongsheng1, Ma Lun1, Zhao Yanjun2, Chen Bintao1, Shi Jianglong1, WangLei1   

  1. 1. Northwest Branch of PetroChina Research Institute of Petroleum Exploration and Development, Lanzhou, Gansu 730020, China;
    2. CNPC International (Nile) Ltd., Khartoum 10687, Sudan
  • Received:2020-04-25 Revised:2020-09-01 Online:2021-02-25 Published:2021-04-27

摘要: 针对南苏丹Melut盆地Ruman凹陷稠油油藏成藏机理及勘探潜力认识不清的问题,运用烃源岩盆地模拟、油藏分析等研究方法,对Ruman凹陷东斜坡稠油油藏成藏机理进行研究,并对该区稠油的勘探潜力进行分析。研究结果表明:Ruman凹陷东斜坡Yabus组、Gayger组与基岩油藏受Lau组沉积时期构造运动影响,原生油藏发生破坏,现今为次生型残留稠油油藏,勘探潜力十分有限;Jimidi组油藏为晚期成藏次生型稠油油藏,有利勘探面积约为21 km2,Galhak组油藏属于晚期成藏原生型稠油油藏,有利勘探面积约为105 km2,均具有较大勘探潜力。该研究可为研究区下步油气勘探提供一定的借鉴和指导。

关键词: 稠油, 成藏机理, 勘探潜力, 油源分析, 成藏过程, Ruman地区, Melut盆地

Abstract: Aiming at the problem of unclear understanding of the reservoir-forming mechanism and exploration potential of heavy oil reservoirs in the Ruman sag of the Melut Basin in South Sudan, the reservoir-forming mechanism of heavy oil reservoirs in the eastern slope of the Ruman sag was studied by using research methods such as source rock basin modeling and reservoir analysis, and the exploration potential of heavy oil in this area was analyzed. The results show that the primary reservoirs of the Yabus Formation, Gayger Formation and bedrock reservoirs in the eastern slope of the Ruman sag were destroyed due to the tectonic movement during the sedimentary period of the Lau Formation, and have become secondary residual heavy oil reservoirs, thus they have very limited exploration potential. The oil reservoir in the Jimidi Formation is a secondary heavy oil reservoir with late accumulation and favorable exploration area of about 21 km2. The oil reservoir in the Galhak Formation belongs to a primary heavy oil reservoir with late accumulation and favorable exploration area of about 105 km2. They both have larger exploration potential. This study can provide some reference and guidance for the next oil and gas exploration in the study area.

Key words: heavy oil, accumulation process, exploration potential, Oil source analysis, Accumulation process, Ruman sag, Melut Basin

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