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de Macedo, IAX (2019)

On the well-to-seismic-tie analysis: effects of the borehole geometry and assumptions on wavelet estimation

Ph.d Thesis, Federal University of Pará Institute of Geosciences Geophysics Graduate Program.

ISSN/ISBN: Not available at this time. DOI: Not available at this time.



Abstract: The well-to-seismic-tie is a key step in seismic processing and interpretation since it pro- vide the means to correctly connect the seismic data to the geology of the subsurface. It joins the information from the seismic surveys with the informations from the well log data. The conventional well-tie procedures, however, does not considers possible acquisition errors of well log data due to borehole enlargement, and the modelling of the synthetic trace is generally based on the classical premises of the convolutional model. This research present a few tools to enhance the quality of the well-to-seismic-tie by 1) proposing a form of correction of the density log for the borehole enlargement and a form to detect errors on the re ectivity through the Benford distribution 2) proposing wavelet estimations methods that does not imply a random process re ectivity or a minimum-phase wavelet. The focus of this study is to provide tools to circumvent some of the current objections to the conventional well tie procedure in order to have an accurate wavelet and a satisfatory seismic inversion, so that a reliable estimate of the Earth's physical properties can be made, which is crucial to the reservoir characterization.


Bibtex:
@phdThesis{, AUTHOR = {Isadora Augusta Santana de Macedo}, TITLE = {On the well-to-seismic-tie analysis: effects of the borehole geometry and assumptions on wavelet estimation}, SCHOOL = {Federal University of Pará Institute of Geosciences Geophysics Graduate Program}, YEAR = {2019}, TYPE = {Thesis ({Ph.D.})}, URL = {http://cpgf.propesp.ufpa.br/ARQUIVOS/teses/tese-isadora-augusta-santana-de-macedo.pdf}, }


Reference Type: Thesis

Subject Area(s): Natural Sciences