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本文根据所研究地区的地质条件建立了一个储集层声波测井解释模型,并根据岩心分析资料与测井资料对比,给出一个对声波测井结果进行油气影响和未固结影响校正的近似方法。这个方法的特点是直接校正△t,而不是校正声波孔隙度φS,这将为声波测井在综合解释中的应用提供更有利的条件。本文给出两个应用实例,并和常规复杂岩性解释系统得到的结果作了对比。结果表明,在含重矿物泥质砂岩层段,本文介绍的方法所给出的孔隙度比复杂岩性系统给出的孔隙度更接近岩心分析结果,而在其他层段两者具有相似的精度。
Based on the geological conditions in the area under study, a reservoir interpretation model of acoustic logging has been established. Based on the comparison between core analysis data and well logging data, an approximation of oil-gas effects and unconsolidated correction of acoustic logging results is given method. This method is characterized by the direct correction of Δt, not the correction of acoustic porosity φS, which will provide more favorable conditions for the application of sonic logging in comprehensive interpretation. In this paper, two application examples are given and compared with the results obtained by the conventional complex lithology interpretation system. The results show that the porosity presented by the method presented in this article is closer to the core analysis than the porosity given by the complex lithology system in the shaly sandstone zone containing heavy minerals and similar in all other intervals .