摘要
井下压力测量是一个相对成熟的技术,井下温度实时测量则是发展中的技术,由井下传感器传输的温度和压力数据具有实时性,在试井中起着重要作用。建立一个气藏压力-温度模型,模拟表现在有地层伤害的情况下气藏中的压力和温度分布。利用无量纲化和拉普拉斯变换,根据地层伤害引起的渗透率变化和渗流条件得出边界条件,可求得气藏流动模型的解析解。地层伤害对气藏压力和温度分布的影响很明显,且气井产量和气藏地层伤害程度也使瞬时温度有不同程度的变化,通过分析瞬时温度的变化可以反推气藏的地层属性。
With application of downhole sensors in oil and gas wells,downhole pressure measurement is a relatively mature technology and real-time measurement of the downhole temperature is a developing technology.The real-time temperature and pressure data transmitted by downhole sensor play an important role in well testing.Established is a gas reservoir pressure-temperature model which simulates the distribution of pressure and temperature in the case of damage skin.The gas reservoir flow model can be solved by nondimensionalization and Laplace transformation and the equation can be determined by boundary conditions.The distribution of reservoir pressure and temperature can be influenced by damage skin obviously.Meanwhile,the production of gas wells and the degree of dumage skin will make the transient temperature change in the different degree and the formation properties of damage skin can be inversed through analysis on transient temperature change.
出处
《天然气与石油》
2015年第2期73-77,12-13,共5页
Natural Gas and Oil
关键词
地层伤害
流动模型
瞬时温度
Damage skin
Flow model
Transient temperature
