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层序地层分析在地层学理论研究和石油勘探开发中有着重要的地位。不同级次层序界面的划分是层序地层分析的关键。测井资料作为地层岩性、物性的反映,其中必然蕴含了大量与沉积地层旋回变化有关的信息。以胜坨油田某井为例,利用零通小波对信号拐点的敏感性和多尺度分析特性,在不同尺度上定量划分出不同级别的地层层序界面,结果与传统方法所划分的界面基本一致。这些探索为地层层序的定量划分提供了一种新的思路。
Sequence stratigraphy analysis plays an important role in stratigraphy theory research and petroleum exploration and development. The division of different levels of sequence boundaries is the key to sequence stratigraphic analysis. Logging data, as a reflection of lithology and physical properties of strata, inevitably contains a great deal of information related to the cyclic changes of sedimentary strata. Taking a well in Shengtuo oilfield as an example, the stratigraphic sequence boundaries of different levels are quantitatively identified on the basis of sensitivity and multi-scale analysis of the zero-crossing wavelet to the inflection point of the signal. The results are basically the same as those of the traditional methods . These exploration provide a new idea for the quantitative division of stratigraphic sequence.