岩性油气藏 ›› 2018, Vol. 30 ›› Issue (4): 37–45.doi: 10.12108/yxyqc.20180404

• 油气地质 • 上一篇    下一篇

南苏丹Melut盆地北部地区岩性油藏成藏条件及勘探启示

王国林1, 史忠生2, 赵艳军1, 陈彬滔2, 薛罗2   

  1. 1. 中油国际尼罗河公司, 喀土穆 10687, 苏丹;
    2. 中国石油勘探开发研究院 西北分院, 兰州 730020
  • 收稿日期:2017-11-25 修回日期:2018-03-28 出版日期:2018-07-21 发布日期:2018-07-21
  • 第一作者:王国林(1964-),男,博士,教授级高级工程师,主要从事石油地质综合研究和勘探生产组织工作。地址:(100034)北京市西城区阜成门北大街6-1号尼罗河公司办公室。Email:wguolin@cnpc-nile.com
  • 通信作者: 史忠生(1978-),男,博士,高级工程师,主要从事石油地质与综合评价方面的研究工作。Email:shiluck@163.com。
  • 基金资助:
    国家重大科技专项“大型油气田及煤层气开发”（编号：2008ZX05029）资助

Lithologic reservoir forming conditions and its exploration implication in northern Melut Basin,South Sudan

WANG Guolin1, SHI Zhongsheng2, ZHAO Yanjun1, CHEN Bintao2, XUE Luo2   

  1. 1. CNPC International Nile Limited, Khartoum 10687, Sudan;
    2. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China
  • Received:2017-11-25 Revised:2018-03-28 Online:2018-07-21 Published:2018-07-21

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摘要： 南苏丹Melut盆地北部地区经过十多年的勘探部署，目前剩余构造圈闭少、面积小，难以满足勘探需求，勘探领域需向岩性油藏领域转移。以近200口探井的测井、录井、岩心，以及4 000多km2三维地震资料为基础，开展了Melut盆地烃源岩、沉积相及断裂特征分析，结果表明： ①北部地区发育Jamous凹陷、Abyat凹陷、Moleeta凹陷和Ruman凹陷4个生油凹陷，油源条件优越； ②白垩系Galhak组和古近系Yabus组上段发育三角洲前缘砂泥岩互层沉积，其岩性组合特征有利于岩性圈闭的形成； ③断裂为Galhak组源内及Yabus组源上岩性油藏的形成提供了油气运移通道。Melut盆地北部地区具备形成岩性油藏的地质条件，该认识指导了Ruman地区Galhak组上倾尖灭、Gasab地区Yabus组构造-岩性等一批岩性油藏的勘探发现，推动了Melut盆地岩性油藏的勘探进程。

关键词: 流动单元, 致密砂岩气, 渗透率, 核磁共振测井, Swanson参数, 须家河组, 四川盆地

Abstract: After more than ten years of exploration in northern Melut Basin,the remaining structural traps are limited and small,which is difficult to meet the exploration demands,and the exploration field should be transferred to the field of lithologic reservoir. With wire-logging,mud-logging and coring data from near 200 exploration wells and more 4 000 km2 3D data,the source rock evaluation,sedimentary facies and fault features were researched,the results show that:firstly,the northern Melut Basin consists of Jamous,Abyat,Moleeta and Ruman depressions acting as four active oil kitchens and presents sufficient oil source. Secondly,interbedded sandstone and mudstone of delta front developed in Cretaceous Galhak Formation and Tertiary Yabus Formation,which is favor-able to form lithological traps. Thirdly,faults could enhance the oil charging for Galhak Formation as insource reservoir and act as migration pathway for upper member of Yabus Formation as above-source reservoir. The research shows that northern Melut Basin has the geologic conditions for forming lithologic reservoirs and guides a series of exploration discoveries of lithologic reservoirs,such as up-dip pinchout lithologic reservoir of Galhak Formation in Ruman area and structural-lithologic composite reservoir of Yabus Formation in Gasab area, which strongly promotes the exploration and deployment of lithologic reservoirs in northern Melut Basin.

Key words: flow unit, tight sandstone gas, permeability, NMR log, Swanson parameter, Xujiahe Formation, Sichuan Basin

中图分类号: 

  • TE121.3
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