岩心刻度测井在建立测井解释模型中的应用

Application of Core Calibration Logging in Establishing Log Interpretation Model

利用岩心刻度测井建立测井解释模型以提高测井解释精度,对于储集层描述和油气层评价具有重要意义。首先讨论了岩心刻度测井方法中的关键技术问题,如岩心分析数据深度归位、数据滤波处理及标准化处理方法等。在此基础上,建立相应物性参数的测井解释模型,并从A油田的具体地质条件出发,根据密度、补偿中子、声波测井曲线和自然伽马曲线分别建立了孔隙度、泥质含量和渗透率解释模型;选用阿尔奇公式作为储集层的饱和度解释模型。应用上述模型对A油田的代表井进行了处理并与试油资料对比,符合率达89.2%。

It was of great significant to establish log interpretation model by using core calibration logging to enhance the accuracy of log interpretation for reservoir description and formation evaluation.The key technical problems for core calibration logging methods,such as the methods of depth location of core analytical data,data filtering and log curve standardizing were first discussed.The log interpretation model was established based on the relevant physical parameters.According to geologic condition of certain oilfield,the models for porosity,shale content and permeability are developed based on density,neutron,acoustic log and gamma ray log.The model for oil saturation evaluation of sandstone reservoir is developed by using Archie formula.Logging data from representative wells in the oilfield are processed with the above models,the interpretation precision is 89.2% compared with the formation test data.