ABSTRACT

Lang, J.; Zhang, T.; Zhu, H.; Zeng, J., and Liang, X., 2018. Establishment and application of the ideal model to the milankovitch cycle: A case study of well Y9 in the northern Yunnan-Guizhou area. In: Liu, Z.L. and Mi, C. (eds.), Advances in Sustainable Port and Ocean Engineering. Journal of Coastal Research, Special Issue No. 83, pp. 402–408. Coconut Creek (Florida), ISSN 0749-0208.

To study the characteristics of the Milankovitch cycle in the strata of the northern Yunnan-Guizhou block, we selected the geophysical well logging curve as the primary research subject. Our goals were to discuss the method used to identify the Milankovich cycle and to establish an ideal model for this cycle. Moreover, we investigated the factors that influenced the ideal model using the data length and data interval, preliminarily established a set of methods for Milankovitch cycle identification based on wavelet analysis, and determined the procedures for dividing the Milankovich cycle. Finally, we used this method to study the Milankovich cycle in the Longmaxi Formation strata of Well Y9 in the northern Yunnan-Guizhou block, and we found that a very good Milankovich cyclic period is recorded in the strata. This finding supports the validity of this model, and it can guide the studies of the actual strata, providing a new method for cyclostratigraphic studies.

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