A semiautomatic method to tie well logs to seismic data
- 1 May 2014
- journal article
- Published by Society of Exploration Geophysicists in Geophysics
- Vol. 79 (3), V47-V54
- https://doi.org/10.1190/geo2013-0248.1
Abstract
We evaluated a semiautomatic method for well-to-seismic tying to improve correlation results and reproducibility of the procedure. In the manual procedure, the interpreter first creates a synthetic trace from edited well logs, determines the most appropriate bulk time shift and polarity, and then applies a minimum amount of stretching and squeezing to best match the observed data. The last step resembles a visual pattern recognition task, which often requires some experience. We replaced the last step with a constrained dynamic time-warping technique, to help guide the interpreter. The method automatically determined the appropriate amount of local stretching and squeezing to produce the highest correlation between the original data and the created synthetic trace. The constraint ensured that stretching and squeezing were kept within reasonable bounds, as determined by the interpreter. Results compared well with the manual method, leading to ties along the entire trace length in contrast to the shorter analysis window in the conventional method. Yet, we advise against unsupervised applications because the method is intended as a guide instead of a fully automated blind approach.Keywords
This publication has 26 references indexed in Scilit:
- Dynamic warping of seismic imagesGeophysics, 2013
- Short-time homomorphic wavelet estimationJournal of Geophysics and Engineering, 2012
- Guided seismic-to-well tying based on dynamic time warpingPublished by Society of Exploration Geophysicists ,2012
- How reliable is statistical wavelet estimation?Geophysics, 2011
- Time-lapse image registration using the local similarity attributeGeophysics, 2009
- What's important in making far-stack well-to-seismic ties in West Africa?Geophysics, 2005
- Calibrating well logs to VSP attributes: interval velocity and amplitudeGeophysics, 2002
- Multicomponent VP/VS correlation analysisGeophysics, 1996
- Dynamic waveform matchingInformation Sciences, 1983
- WELL‐TO‐WELL SEISMIC MEASUREMENTSGeophysics, 1972