摘要
在分析天然气扩散系数影响因素的基础上 ,根据天然气在岩石中扩散系数与其在水中扩散系数之间对应函数关系及天然气在水中扩散系数随温度的变化关系 ,建立了一种天然气古扩散系数的恢复计算方法 ,并将其应用于松辽盆地昌德气藏泉一、二段泥岩盖层天然气古扩散系数的恢复计算中 .由于该方法考虑了岩石饱和介质、岩石物性等地质因素的影响 ,校正后的天然气扩散系数大于实验室实测天然气扩散系数 。
Based on analyzing the factors affecting gas diffusion coefficient, according to the relation between gas diffusion coefficient in rock and that in water, this paper established a restoring method of ancient gas diffusion coefficient by varying relation of gas diffusion coefficient in water with temperature, and used it in restoring the ancient gas diffusion coefficient through the mudstone caprock of the first and second member of Quantou formation at Changde gas pool in Songlio Basin. The result showed that the gas diffusion coefficient after restoring is bigger than that of the previous restoring. Because effects of geological conditions such as medium saturated and rock physical characteristics are considered, the restoring results objectively reflects the varying laws of gas diffusion coefficient in geological history.
出处
《大庆石油学院学报》
CAS
北大核心
2000年第4期5-7,共3页
Journal of Daqing Petroleum Institute
关键词
天然气
古扩散系数
恢复方法
松辽盆地
气藏
gas
ancient gas diffusion coefficient
restoring method
Songliao Basin
Changde gas pool
