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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions
Vol. 39 (1989), Pages 591-591

Abstract: Quantitative Chemical Stratigraphy of Offshore Exploration Wells of the Flexure Trend: Spectral Previous HitCoherencyNext Hit Analysis

Douglas F. Williams (1), Ian Lerche (1), Zhihuai Yu (1), Xidong Chen (1), Dwight M. Trainor (1)


Isotope chronostratigraphy provides an improved basis for high resolution stratigraphic correlation of Plio-Pleistocene exploration wells but the method has inherent limitations due to the non-unique and quasi-periodic nature of the ^dgr18O and ^dgr13C signals. In this paper we present a quantitative basis for using isotope chronostratigraphy records, as well as other forms of chemical stratigraphy for use in the Flexure Trend (i.e., carbonate and fine-fraction chemical stratigraphies). The quantitative basis of chemical stratigraphy is demonstrated using matched filtering of isotope chronostratigraphy records to identify the noise levels in the records and enhance the signal to noise ratio. Cross power spectral analysis and spectral Previous HitcoherencyTop of the noiseless records are then used to increase the robustness of high resolution stratigraphic correlations, thereby improving the quality of depositional models for Flexure Trend wells from Green Canyon, Ewing Banks and South Timbalier blocks.

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(1) Geological Sciences, University of South Carolina, Columbia, South Carolina 29208

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