摘要
渗吸现象存在于大多数油气藏中,尤其是具有活跃边底水的油气藏和裂缝性油气藏。根据多孔介质的连续性特征,建立了简化的渗吸实验方法,根据该方法所获得的实验数据可以计算水的相对渗透率和毛细管压力。实验结果表明,渗吸速度与天然气采收率的倒数成线性关系,并可根据标准化采收率与无因次时间的关系预测任意时刻天然气的采收率。结果证实,该方法准确性高,具有较强的可行性。
Spontaneous water imbibition phenomena exist in the most of oil-gas reservoirs especially in the oil-gas reservoirs with active edge water or bottom water and fracture-type oil-gas reservoirs. A simplified imbibition experiment is designed according to the continuity property of porous media. Using the test data by this method can calculate relative permeability of water and capillary pressure. Experiment results show that linear relationship between imbibition rate and the reciprocal of the gas recovery is found. Relation between the normalized recovery and the dimensionless time can predict gas recovery at any moment. The results prove that this method is accurate and avaiable well.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2006年第6期79-80,83,共3页
Petroleum Geology and Recovery Efficiency
关键词
渗吸现象
产量递减
渗透率
毛细管压力
采收率
imbibition phenomena,production decline, permeability, capillary pressure, recovery efficiency
