新疆石油地质

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (1): 212-214.

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天然气成藏与保存

付孝悦   

  1. 中国石化南方勘探开发分公司,云南昆明650200
  • 收稿日期:2003-12-05 出版日期:2004-02-01 发布日期:2020-08-14
  • 作者简介:付孝悦(1962-),男,湖南宁乡人,高级工程师,油气勘探。联系电话:0871-6143364(0)

On Gas Accumulation and Preservation

FU Xiao-yue   

  1. Southern Company of Exploration and Development, Sinopec, Kunming, Yunnan 650200,China
  • Received:2003-12-05 Online:2004-02-01 Published:2020-08-14

摘要： 天然气成藏是一个天然气聚 集与逸散的动态平衡过程.气藏的充注和保存是成藏的两个主要要素。含 气盆地的保存因素主要取决于盖层、后期构造运动、气藏形成时间、供气面积和供气强度,大型天然气田的生轻强度一般在20x108 m3/km2以上。从整体到局部、采用多方法、多参数全面系统的分析是正确把握和认识该地区油气勘探潜力的基础。特别强调了压力封闭对天然气成藏与保存的重要作用同时认为压力体系可作为判断含气盆地是否具有整体封存保存条件的一类重要指标。

关键词: 含气盆地, 天然气藏, 充气, 保存, 盖层, 突破压力, 压力系统

Abstract: Natural gas accumulation is a process of dynamic balance between gas accumulation and gas fugitive emission, in which the inflow and preservation of gas are the key factors for gas reservoir.The preservation of gas-bearing basin primarily depends on its cap rock, late tectonic movement, forming time of gas reservoir, gas supply area and intensity. Normally, a largegas field has its hydrocarbon-generating intensity of over 20x108 m3/km2. The study shows that from the whole to the local, usingmultiple methods and parameters for systematic analysis is a foundation of proper hold and understanding of petroleum prospectsin an area. This paper stresses the effect of pressure seal on gas accumulation and preservation. The pressure system can be asan important index for discrimination of whether a gas-bearing basin possesses sealing and preservation conditions on the whole ornot.

Key words: gas-bearing basin, natural gas reservoir, gas inflow, preservation, cap rock, breakthrough pressure, pressure system

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