西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

阿曼盆地下古生界碎屑岩成藏组合地质特征

李浩武1,童晓光2,王建君1,温志新1,张永军3   

  1. 1. 中国石油勘探开发研究院,北京海淀100083
    2. 中国石油海外勘探开发公司,北京西城100034
    3. 中国石油集团测井有限公司吐哈事业部,新疆哈密838202
  • 出版日期:2014-12-01 发布日期:2014-12-01
  • 基金资助:

    国家重大科技专项(2008ZX–05028);中国石油天然气股份公司重大专项(2008E–0501)。

The Geological Characteristics and Hydrocarbon Accumulation Model
of the Lower Paleozoic Clastic Play,Oman Basin,Middle East

Li Haowu1, Tong Xiaoguang2, Wang Jianjun1, Wen Zhixin1, Zhang Yongjun3   

  1. 1. Research Institute of Petroleum Exploration & Development,PetroChina,Haidian,Beijing 100083,China
    2. China National Oil and Gas Exploration and Development Corporation,Xicheng,Beijing 10034,China
    3. Tuha Division,China Petroleum Logging Co. Ltd.,Hami,Xinjiang 838202,China
  • Online:2014-12-01 Published:2014-12-01

摘要:

下古生界碎屑岩成藏组合是阿曼盆地最重要的天然气成藏组合,寒武系—志留系Haima 群储层及上覆泥岩
层构成了基本的储盖组合,Huqf 群烃源岩为最主要的供烃源岩。在系统解剖油气成藏要素的基础上,探讨了不同次盆
油气成藏作用与过程,并分析了其勘探潜力与风险。在Ghaba 次盆主体部位,Huqf 群烃源岩现今以生气为主,深埋升
温裂解而成的焦沥青多充填了早期圈闭孔隙空间,应关注白垩纪之后形成的新圈闭;受中央古隆起阻隔,Ghaba 次盆
东翼圈闭充注有效性差。南阿曼次盆中部,厚层Ara 盐岩阻隔油气垂向运移至浅层Haima 群中,圈闭有效性偏差。南
阿曼次盆东翼,Ara 盐层被持续溶解后,释放出盐内和盐下圈闭中先期聚集的原油,可重新聚集成藏,原油勘探的风险
较小。

关键词: 下古生界成藏组合, Huqf 烃源岩, Haima 群储层, 油气成藏, 阿曼盆地

Abstract:

The lower Paleozoic clastic play is the most important gas play in Oman Basin,the sandstone reservoirs of Cambrian-
Silurian Haima Group and its overlying thick mudstone being the basic reservoir-caprock combination,Huqf Group is the most
important source rock. This paper analyzes the petroleum geological conditions,hydrocarbon accumulation models,exploration
potential and risks. In the center of Ghaba sub Basin,Huqf source rock only generates gas today. The pores of early traps were
mostly filled with the pyrobitumens formed by high formation temperatures. Attention should be paid to the traps formed after
Cretaceous in exploration. The central palo-uplift of Ghaba Basin was a barrier for lateral migration,so the traps in east flank
have risk of hydrocarbon charge. In the center of south Oman Sub Basin,it′s difficult for hydrocarbon to migrate vertically
through the thick Ara salt to the upper Haima Group,so most of the traps lack potential. In the east flank of south Oman Basin,
for the continued dissolution of Ara salt,which destroyed the seal of former oil pools,the oil released from them could recharge
new traps of Haima Group,so there are chances for oil exploration.

Key words: lower Paleozoic play, Huqf source rock, reservoir of Haima Group, hydrocarbon accumulation, Oman Basin