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层序界面的识别是层序地层学中的一个关键问题。通常识别层序界面的方法是应用岩心、地震、测井及古生物等资料进行综合判断。对于稀疏井网条件,由于地震资料分辨率以及钻井取心段的限制,充分挖掘并利用测井资料就成为解决层序划分与对比问题的关键。文中以珠江口盆地珠江组层序划分为例,采用自然伽马形态法、声波时差识别法和小波分析法等多种方法进行了层序界面的识别,总结出了稀疏井网条件下充分挖掘测井信息,进而划分层序界面的方法。
The identification of sequence boundaries is a key issue in sequence stratigraphy. The usual method of identifying sequence boundaries is to make comprehensive judgments using core, seismic, logging and paleontological data. For the sparse well pattern, due to the resolution of the seismic data and the limitation of the drilling coring segment, it is the key to solve the sequence division and contrast problem that fully exploiting and utilizing the well logging data. In this paper, the sequence of the Zhujiang Formation in the Pearl River Mouth Basin is used as an example to identify the sequence boundary by various methods such as gamma ray morphology, acoustic time difference recognition and wavelet analysis, Logging information, and then divide the sequence interface method.