通过地层水渗吸实验建立水驱气藏气井产量递减模型  

Production decline modeling of the gas wells in water drive gas reservoir by the experiment of formation water imbibition

作　　者：田文忠[1] 赵华[1] 孙雷[2] 易敏[2] 

机构地区：[1]中国石化股份西南分公司川西采输处,四川德阳618000 [2]西南石油学院石油工程学院,四川成都610500

出　　处：《油气地质与采收率》2006年第6期79-80,83,共3页Petroleum Geology and Recovery Efficiency

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.

关 键 词：渗吸现象 产量递减 渗透率 毛细管压力 采收率 

分 类 号：TE313.8[石油与天然气工程—油气田开发工程]