塔河油田八区奥陶系碳酸盐岩缝洞储层测井识别研究

STUDY OF IDENTIFYING LOGGING IN CARBONATE RESERVOIR OF ORDOVICIAN IN EIGHT BLOCK,TAHE OIL FIELD

塔河油田八区奥陶系碳酸盐岩储集层具有基质致密、缝洞发育、纵横向强非均质性等突出特点,根据15口井取心井段的岩心观察、钻井资料、测井资料、FMI成像测井资料及试油资料对该地区奥陶系碳酸盐岩储层中的缝洞体系进行识别。在对测井资料标准化、归一化等预处理计算的基础上,提取8个常规测井特征参数,识别出5种类型储集层的典型电性响应特征,作为缝洞体系的常规识别标准,建立研究区储集层测井分类识别模型,通过对比和检验,获得了较高的识别符合率,为塔河油田复杂碳酸盐岩储层识别和流体类型识别提供了一种实用、高效的方法。

The Ordovician carbonate reservoir in the Eighth Block of Tahe Oil Field is characteristic of massive matrix,development of fissures and porosity,heterogeneity in the vertical and horizontal directions.Based on the observation of drilling cores,drilling and logging data,FMI image logging data,the fissure and porosity systems in the carbonate rocks of Ordovician are identified.Through the initial processing of logging data,characteristic parameters of conventional logging are obtained and typical electricity response characters for 5 types of reservoirs are determined.Accordingly,the identification model of logging classification for reservoir in the studied area is established.On the basis of summarization on the logging response characters for different fluids in different reservoirs,some characteristic parameters reflecting the difference of oil and water are obtained and applied to the identification of oil and water layers.The research provides a practical method for the identification of complicated carbonate reservoir and fluid types in the Tahe oil field.