时间推移双侧向测井响应特征及其变化规律

Response characteristics of time-lapse dual laterolog and their variations

由于钻井泥浆滤液对储层的动态侵入使得电阻率测井结果偏离地层真电阻率，其偏离程度应与侵入时间有关。本文利用时间推移双侧向测井（TLDL）模型，研究了深、浅侧向测井RLD和RLS的动态响应特征，讨论了TLDL随储层参数的变化规律。与传统的一次测井方法相比，TLDL可以提供更为丰富、准确的数据，有助于进一步认识侵入过程的复杂性及其对测并结果的影响，为求准地层真电阻率和含烃饱和度、正确评价储层性质提供了一种定量分析的新方法。

The drilling mud-filtrate invasion into reservoir makes resistivity log result deviate from the accurate resistivity. This deviation is related to invasion time. Themodel of time-lapse dual laterolog is used to study the dynamic responses of deepand shallow laterologs , and to discuss how time-lapse dual laterolog response varieswith the changes of reservoir parameters. Compared with the usual method basedon static profile model, time-lapse dual 1aterolog can offer plenty of correct data tofavour our further understanding both of complexity in invasion process and of influence on log result. As a result, we have a new quantitative method for obtainingcorrect resistivity and hydrocarbon saturation of formation to nicely evaluate reservolr.