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黄骅凹陷火成岩岩性极其复杂多样,如何对该区火成岩岩性进行准确识别一直是个棘手的问题。为此,在岩心观察和薄片鉴定的基础上,建立了基于常规测井曲线的黄骅凹陷火成岩岩性识别图版。由于图版中岩性存在重叠以及可用测井曲线种类相对较少,影响了图版应用的准确性。因此为了更为准确地识别火成岩岩性,首先利用对应分析法分析了测井响应与火成岩岩性的关系,计算出各曲线对火成岩各岩性的敏感系数(以权值形式给出),然后确定各曲线对不同岩性的灵敏度,最后利用对应分析法权值对火成岩岩性识别图版进行了校正,并用实例进行了验证,校正效果较好。
The igneous rocks in Huanghua sag are extremely complex and diverse in lithology. How to accurately identify igneous rock lithology in this area has been a thorny problem. Therefore, on the basis of core observation and sheet identification, a lithologic identification map of igneous rocks in Huanghua sag based on conventional well logging curves was established. Due to the overlap of lithology in the plate and the relatively small number of available logging curves, the accuracy of plate application is affected. Therefore, in order to identify the lithology of igneous rocks more accurately, the relationship between logging response and igneous rock lithology is analyzed by correspondence analysis method, and the sensitivity coefficient of each curve to igneous rock lithology (given by weight) is calculated. Then, The sensitivities of each curve to different lithologies are determined. Finally, the lithology identification plate of igneous rock is calibrated with the corresponding analytical weight, and verified by examples, the correction effect is better.