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本文提出了一种应用时间推移测井资料估算渗透率的方法。储层渗透率也可以通过历史匹配生产数据和分析岩心数据获得。这些渗透率值与测井估算值相吻合。 当钻一口井时,泥浆滤液侵入井眼周围的地层。泥浆滤液侵入量与时间、地层渗透率、其它井眼和地层参数有关。随着泥浆滤液的侵入,在井眼周围的地层分别产生特殊的饱和度、电阻率和含水饱和度剖面。所以说测井数据是随时间而变化的。通过观察和分析测井数据随时间的变化,可以估算地层渗透率。
This paper presents a method for estimating permeability using time-lapse logging data. Reservoir permeability can also be obtained from historical matching production data and analyzing core data. These permeability values are consistent with well log estimates. When drilling a well, mud filtrate intrudes into the formation surrounding the wellbore. The amount of mud filtrate intrusion is related to time, formation permeability, other borehole and formation parameters. With the invasion of mud filtrate, special saturation, resistivity and water saturation profiles are produced in the strata around the borehole, respectively. So logging data is changing over time. Formation permeability can be estimated by observing and analyzing changes over time in log data.