摘要
研究了含不同类有机质的源盖层在不同演化阶段的生油气特征及孔隙水的变化情况 ,确定了天然气存在相态 ,并分析了源盖层在不同演化阶段对扩散相天然气封闭作用特征 .结果表明 :含腐殖型和含腐泥型有机质的源盖层在生化阶段和高成熟 -过成熟阶段均具有较强的替代封闭作用 ,在低成熟 -成熟阶段早期则均具弱的替代封闭作用 ;成熟阶段高峰期至该阶段结束 ,含腐殖型有机质源盖层具较强的浓度封闭作用 。
This paper deals with the characteristics of oil and gas gene ration and pore water changes of caprock with different organic types in differe nt evolution stages, and identifies the phase of gas in porosity of caprock. Acc ording to this, this paper analyzes the seal characteristics of sourcerock capro ck in different evolution stages of different organic types to the gas in diffus ion phase. The caprocks with sapropelic and humic organic matter possess strong replacing seal ability from high peak to declining period of mature stage. The c aprock with sapropelic organic matter possesses weak concentration seal ability or replacing seal ability.
出处
《大庆石油学院学报》
CAS
北大核心
2003年第3期15-17,共3页
Journal of Daqing Petroleum Institute
基金
中国石油天然气集团公司石油科技中青年创新基金资助项目 ( 2 0 0 1CX2 )
关键词
天然气
有机质
成熟度
演化阶段
泥岩盖层
浓度封闭
替代封闭
gas
organic matter maturation
evolution stage
mudst one caprock
concentration seal
replacing seal
