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确定地层压力、渗透率和井壁阻力系数在已知地层渗透率的情况下可以用IFT法来确定地层压力和井壁阻力系数。但是,有时在现场未取得各油层的渗透率值,或者是已有的渗透率数据可靠性较差。此时,对每一油层要求同时确定地层压力、渗透率和井壁阻力系数三个未知数。对一个多层油藏来说,要求的未知数相当多,但生产测井能取得的信息却受到种种条件的限制。现提出一种实用的近似方法,使之在现场实践中可以达到,而其参数计算误差又是油田实践可
Determining formation pressure, permeability, and borehole drag coefficient The IFT method can be used to determine formation pressure and borehole drag coefficient for known formation permeability. However, it is not always possible to obtain the permeability values of the oil layers in the field or the reliability of the existing permeability data is poor. At this point, for each reservoir requires simultaneous determination of formation pressure, permeability and wall drag coefficient of three unknown. For a multi-layered reservoir, the number of unknowns required is quite large, but the information that a production well can obtain is limited by a number of conditions. Now put forward a practical approximation method, so that it can be achieved in the field practice, and its parameter calculation error is field practice