利用对应分析法校正火成岩岩性识别图版——以黄骅凹陷为例

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 Correction of Correspondence Analysis to the Lithologic Identification Plate of Igneous Rocks in Huanghua Depression

In Huanghua Depression igneous reservoir is widely developed both in the vertical and horizon direction.Its lithologies are very complex,so it's always difficult to identify the lithologies of igneous rocks for geologists.On the basis of core observation and thin slice analysis,log response of various igneous rocks was studied,and a lithologic identification plate of igneous rocks based on conventional well logs in Huanghua Depression was established.In view of the limited types of available well logs and the overlapping regions in plates,in order to identify the lithologies of igneous rocks more accurately and effectively,the relationship between log response and lithologies of igneous rocks by correspondence analysis was firstly analyzed.The sensitivity coefficient of well logs for various igneous rocks (represented with the right value) was then calculated,and the sensitivity of well logs for various igneous rocks was established.Then the lithologic identification plate of igneous rocks with the right value of correspondence analysis combined with the log response of various igneous rocks was corrected.After validation,the result of correction to lithologic identification plate of igneous rocks by correspondence analysis obtained very good effect in Huanghua Depression. 