利用感应测井动态响应估计地层真电阻率

泥浆滤液对地层的侵入使感应测井响应偏离地层真电阻率，还使得测井响应与泥浆滤液的浸泡时间有关。利用感应测井的动态响应模型，可以深入研究深、中感应测井响应随泥浆滤液浸泡时间的动态响应特征，进而更准确地估算地层真电阻率。对油田现场数据进行了模拟计算，结果与实际测井符合得较好。感应测井的动态响应结果有助于进一步认识侵入过程的复杂性，定量化描述侵入过程对测井结果的影响，为评价储集层性质提供更可靠的依据。

Estimating True Resistivity of Formation Using Dynamic Response of Induction Log

Invasion of the drilling mud filtrate into a reservoir will cause two undesirable effects on induction log:first, the logging response will deviate from the true resistivity of formation;secondly, it is dependent of time. By the dynamic response model of induction logging, the dynamic characteristics between the dual induction logging responses and the invasion time of the mud filtrate can be obtained and the true resistivity of formation can be estimated. Satisfying agreement between the practical logging data and the simulated results was achieved. This technique may be helpful for analysts to further recognize the complexity of the invasion process, to quantify the effect of invasion on the result of well logging and to evaluate the properties of reservoir reliably.