新疆石油地质

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (1): 25-28.

• 油气勘探 • 上一篇    下一篇

莺歌海盆地流体势场演化对天然气运聚的控制

金博1, 刘震1, 何汉漪2, 李绪深3   

  1. 1.石油大学 石油天然气成藏机理教育部重点实验室,北京 102249;
    2.中海石油 研究中心,北京 100027;
    3.中海石油有限公司 湛江分公司,广东 湛江524057
  • 收稿日期:2004-01-15 出版日期:2005-02-01 发布日期:2020-08-24
  • 作者简介:金博(1974- ),男,陕西武功人,在读博士研究生,油气成藏机理与分布,(Tel )010- -89733786.

The control of Paleo-Fluid Potential Evolution to Natural Gas Migration and Acumulation in Yinggehai Basin

JIN Bo1, LIU Zhen1, HE Han-yi2, LI Xu-shen3   

  1. 1. Key Laboratory of Hydrocarbon Accumulation Mechanism, Ministry of Education, University of Petroleum, Beijing 102249, China;
    2. Research Center, CNOOC, Beijing 100027, China;
    3. Zhanjiang Company, CNOOC, Zhanjiang, Guangdong 524057, China
  • Received:2004-01-15 Online:2005-02-01 Published:2020-08-24

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摘要： 首先建立莺歌海盆地受埋藏深度和时间双重因素控制的孔隙度演化函数,然后利用该孔隙度函数求出地层古厚度和古埋深;选取“改进的Pillipone公式”压力计算模型预测出古地层压力,并通过实测地层压力对其进行误差校正;最后根据古埋深和古地层压力计算古流体势。通过综合分析成藏期至今的流体势场演化过程,发现流体势场演化及分布特征对天然气运移聚集的控制在不同地区、不同层位有明显差异。总体上讲,坳陷区生成的天然气有向低势区聚集的趋势,东方1-1构造带和莺东斜坡带为天然气运聚的有利区带。

关键词: 莺歌海盆地, 流体势, 地层压力, 孔隙度, 埋藏深度, 天然气运移, 天然气聚集

Abstract: The porosity evolutional function controlled by buried depth and time in Y inggehai basin is established, by which paleothickness and paleodepth of the strata are given; and paleopressure of formation is predicted by the model with modifed Pillipone formula, the error correction is then made by using observed formation pressure; finally, the paleo-fluid potential is estimated based on the paleodepth and paleopressure. The comprehensive analysis of fluid potential evolution from petroleum accumulation stage to present indicates that obv ious differences occur in control of the evolution of paleofluid potential and its distribution characteristic to the natural gas migration and accumulation in different areas and different horizons. It is concluded that the natural gas generated from Y inggehai depression area tends to accumulating towards low fluid potential zone, and DF 1-1 structural belt and Yingdong slope belt could be favorable areas for gas accumulation.

Key words: Yinggehai basin, fluid potential, formation pressure, porosity, buried depth, gas migration, gas accumulation

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