镜质体反射率与最高温度及其附近温度变化率的关系--几种镜质体反射率计算模型的比较

对常用的Waples、Middleton及Easy%Ro模型，通过蒙特卡罗方法，得到了相应的简化模型.所有简化模型均表明镜质体反射率(Ro)主要受控于最高温度(Tmax)，并且与最高温度附近的温度变化率(Hr)有关.通过对简化模型的比较发现：(1)相对于Easy%Ro模型而言，Waples、Middleton模型对Hr的变化更为敏感；(2)总的来讲，达到相同的Ro值Middleton模型需要的温度最高，Easy%Ro模型其次，Waples模型需要的温度最低.在一定条件下，根据简化模型，利用实测的lnRo-H数据可以求取地层经历的最高温度及相应的地温梯度、热流和时间.实例分析表明岩石热导率等数据的准确性直接影响Ro解释的结果，但这种影响容易分析，而Hr的不确定性则导致多解性.

Relations between vitrinite reflectance, peak temperature and its neighboring temperature variation rate: A comparison of methods

Simplified models for three existing VR models(i.e.Middleton model,Waples model and Easy%R-o model) are obtained through the Monte Carlo Method.These simplified models show that the VR value is mainly determined by peak temperature(T-(max)),and is related to the temperature variation rate around the peak temperature(H-r).By comparing these simplified models,it is found that the Waples model and Middleton model are more sensitive to H-r than the Easy%R-o model,and,for the same value of VR,the Middleton model predicts the highest peak temperatures,Waples model the lowest and Easy%R-o model in between.These simplified models can be employed to interpret real VR data set to obtain the peak temperature that a stratum has experienced since deposition,and the thermal gradient,heat flow and time when the stratum experienced this peak temperature.Interpretation of VR data from the Inigok 1 well in the North Slope in Alaska indicates that poorly constrained data,such as thermal conductivity,may lead to errors.But these errors can be analyzed and quantified.However,the uncertainties of H-r may lead to non-uniqueness in the interpretation.