测井资料在确定不整合面深度中的应用

Application of logging data in identifying the depth of unconformity

（1.中国石油大学（华东）地球资源与信息学院，山东东营 257061；2.中国石油化工股份有限公司胜利油田地质科学研究院，山东东营 257015）

College of Geo-Resources and Information, China University of Petroleum, Dongying 257061, China

不整合面是构造旋回和岩石地层单位划分的重要依据，且与油气关系密切，因此准确确定不整合面的深度具有重要的地质意义。但由于取心资料有限，地震资料分辨率较低等原因，对于地震响应不明显的地层，无法准确地确定不整合面的深度。而测井资料的纵向分辨率较高，不整合面在测井资料上具有特殊的响应特征，因此，在地震资料的宏观控制下，利用最优分割法对某研究区的不整合面进行了确定。结果表明，测井确定的不整合面深度与地质确定的不整合面深度基本吻合。

The unconformity is an important criterion for dividing the tectonic cycle and lithostratigraphic unit of rocks and is closely related with oil and gas. So it makes great geologic sense in exactly ascertaining the unconformity depth. For the low resolution of seismic data and the limitation of core data, the precise unconformity depth of formations with obscure seismic response could not be determined. Logging data has a higher vertical resolution, and unconformity has special response characteristic on logging curves. So the optimum partition method was used to determine the unconformity depth under the macro-control of seismic data. The result shows that the unconformity depth determined by logging data coincides with that ascertained in geologic information.