天然气地球科学
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天然气地球科学 ›› 2011, Vol. 22 ›› Issue (4): 642–648.doi: 10.11764/j.issn.1672-1926.2011.04.642

• 天然气地质学 • 上一篇    下一篇

莺歌海盆地天然气差异输导特征及成藏意义

金博, 张金川, 刘震, 李绪深   

  1. 1.中国地质大学能源学院,北京 100083；2.石油大学地球科学学院,北京 102249；
    3.中海石油有限公司湛江公司,广东 湛江 524057
  • 收稿日期:2011-03-17 修回日期:2011-05-08 出版日期:2011-08-10 发布日期:2011-08-10
  • 通讯作者: 金博jinbo2001@126.com E-mail:jinbo2001@126.com
  • 作者简介:金博(1974-),男,陕西武功人,博士后,主要从事油气成藏机理研究.
  • 基金资助:

    国家自然科学基金“页岩气聚集机理与成藏条件”(编号：40672087)资助.

Different Transformation Behaviors of Natural Gas  and Significance for Gas Accumulation in Yinggehai Basin

JIN Bo, ZHANG Jin-Chuan, LIU Zhen, LI Xu-Shen   

  1. 1.The Resource Institute，China University of Geosciences,Beijing 100083，China;
    2.Key Laboratory for HydrocarbonAccumulation in Petroleum University,Ministry of Education,Beijing 102249,China;
    3.CNOOC Ltd.,Zhanjiang 524057,China
  • Received:2011-03-17 Revised:2011-05-08 Online:2011-08-10 Published:2011-08-10

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摘要：

莺歌海盆地为典型的伸展—转换型盆地,其独特的地质条件决定了天然气具有差异输导特征,这种差异输导体现在盆地尺度、区带尺度和输导体尺度上,中央底辟构造带为泥—流体底辟树型输导系统,深部天然气沿底辟断裂垂向远距离运移到底辟顶部及其周缘的浅层及中深层砂体中成藏。输导体主要以垂向断裂和裂隙为主,莺东斜坡带则为复合输导系统,输导体为砂体、不整合和断裂组成；莺东斜坡输导特征分段性明显,从北段、中段到南段输导性能逐渐增强,具有明显差异输导特征。伸展—转换型盆地的这种差异输导特征对天然气运聚成藏及天然气富集具有明显的控制作用,泥—流体底辟树型输导系统决定了中央凹陷带天然气具有环底辟优势聚集分布的特征,复合输导系统影响莺东斜坡带天然气运聚则具有多样性,天然气各段差异聚集特征明显。

关键词: 伸展—转换型盆地, 天然气, 莺歌海盆地, 差异输导特征, 成藏意义

Abstract:

Yinggehai basin is a Cenozoic extended and transformational sedimentary basin.This unique geological condition causes the different behaviors of gas migration and accumulation.These different behaviors are displayed in the basinal scale,zone scale and transformation scale.The tree-shape transformation system in the central diapirs belt made the deep natural gas migrate alone the mud\|fluid diaper faults and accumulate the surrounding shallow and moderate deep sandstone reservoir at the top of diapirs or its surrounding.The transformation pathway is the vertical conductive fault and fissure.Yingdong slope as a complex transformation system is composed of sand body,unconformity and faults.The transformation system in the Yingdong slope is characterized as segmentation distribution associated with the gradual increase of conductive performance among northern,middle and southern sections in turns.These different transformation behaviors in the extended and transformational sedimentary basin obviously control the natural gas migration and accumulation.The tree-shape on mud-fluid transformation system is favorable of natural gas accumulation around the diapirs.The composite transformation system caused the natural gas migration and accumulation through the different pathways in the Yingdong slope,and the behaviors of natural gas migration and accumulation at each segment in the Yingdong slope were different.

Key words: Extended and transformational basin, Natural gas, Yinggehai basin, Transformation system, Migration and accumulation.

中图分类号: 

  • TE122.1+13

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