石油学报 ›› 2006, Vol. 27 ›› Issue (2): 1-5,10.DOI: 10.7623/syxb200602001

• 地质勘探 •    下一篇

苏丹迈卢特盆地石油地质特征及成藏模式

童晓光1, 徐志强1, 史卜庆2, 窦立荣1, 肖坤叶1   

  1. 1. 中国石油天然气勘探开发公司, 北京, 100034;
    2. 中国石油勘探开发研究院, 北京, 100083
  • 收稿日期:2005-07-27 修回日期:2005-10-12 出版日期:2006-03-25 发布日期:2010-05-21
  • 作者简介:童晓光,男,1935年4月生,1964年南京大学研究生毕业,中国工程院院士,原中国石油天然气集团公司国际合作局副局长,长期从事石油天然气地质勘探研究和管理工作.E-mail:tongxiaoguang@cnpcint.com.cn
  • 基金资助:
    中国石油天然气集团公司科技攻关项目(03B60201)

Petroleum geologic property and reservoir-forming pattern of Melut Basin in Sudan

Tong Xiaoguang1, Xu Zhiqiang1, Shi Buqing2, Dou Lirong1, Xiao Kunye1   

  1. 1. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China;
    2. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
  • Received:2005-07-27 Revised:2005-10-12 Online:2006-03-25 Published:2010-05-21

摘要: 迈卢特盆地是苏丹东南部中—新生代的一个大型陆内裂谷盆地.该盆地发育了强—弱—强3期裂谷,这决定了下白垩统发育主力生油岩、古近系发育主力成藏组合.利用地震资料推断出北部凹陷是主力生烃凹陷,凹陷的半地堑结构和平面斜列特征决定了缓坡带是主力成藏带.而且盆地地温梯度偏低使成藏期偏晚,为古近系提供了充足油源.据此建立了有别于邻区Muglad等盆地和渤海湾盆地的成藏模式,明确了盆地资源潜力和有利勘探方向,为Palogue世界级大油田的快速发现提供了依据.

关键词: 苏丹, 迈卢特盆地, 石油地质特征, 成藏模式, 裂谷盆地, 油藏特征

Abstract: Melut Basin is a large-scale basin of the Cretaceous-Paleogene sediment in the southeastern Sudan.Two strong rifting phases were developed during the Early Cretaceous and Paleocene,and one weak rifting phase was developed in the basin during the Late Cretaceous.Consequently,the main source rocks were deposited in the Lower Cretaceous and the main play was developed in the Paleocene.Based on analogue of seismic reflection characters and sequence stratigraphy,the Lower Cretaceous in the Northern Melut Sub-Basin(NMSB) was deduced as the main source kitchen.The half-graben style of NMSB made the northeastern gentle slope become the most advantageous accumulation area for hydrocarbon.Furthermore,the lower geothermal gradient controlled the critical moment of petroleum system in the Late Eocene,which provided enough hydrocarbons charging into the Paleocene.Accordingly,the pattern of reservoir-forming in Melut Basin was established.This pattern is quite different from adjacent Muglad Basin in Sudan and Bohai Bay Basin in China.Then,a more reasonable estimation of petroleum resources and more scientific exploration strategy in Melut Basin of Sudan were made on the pattern of reservoir-forming,and a Great Palogue Oil Field was successfully discovered by CNPC.

Key words: Sudan, Melut Basin, petroleum geologic property, reservoir-forming pattern, rift basin, reservoir characters

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