
%0 Journal Article
%A Ensley, R.A. 
%T Comparison of P- and S-wave seismic data: a new method for detecting gas reservoirs
%J Exploration Geophysics
%D 1984/09/01
%V 15
%N 3
%P 189-189
%K 
%R https://doi.org/10.1071/EG984189A
%U https://www.publish.csiro.au/paper/EG984189A 
%X Compressional waves are sensitive to the type of pore fluid within rocks, but shear waves are only slightly affected by changes in fluid type. This suggests that a comparison of compressional- and shear-wave seismic data recorded over a prospect may allow an interpreter to discriminate between gas-related anomalies and those related to lithology. This case study documents that where a compressional-wave 'bright spot' or other direct hydrocarbon indicator is present, such a comparison can be used to verify the presence of gas. In practice, the technique can only be used for a qualitative evaluation. However, future improvement of shear-wave data quality may enable the use of more quantitative methods as well. 
