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Acquisition
and Analysis of Multicomponent
Seismic Data, Anadarko Basin, Oklahoma, U.S.A
Multicomponent three-dimensional
seismic data were acquired in the Anadarko Basin, USA. Acquisition involved
simultaneously recording a co-located spread of individual multicomponent
digital sensors with conventional arrays of single-component vertical
geophones. Conventional P-wave data and compressional-to-shear
converted-wave data were recorded from reflectors exceeding 13500 feet in
depth. Differing P-wave and converted-wave reflectivity suggests that
additional information can be extracted from the combined interpretation of
both modes of wave propagation.
Interpretation of multicomponent data holds great
promise for the exploration and development of oil & gas. Shear wave
propagation is sensitive only to rigidity and density, while compressional wave propagation is sensitive to rigidity,
density and compressibility. Interpreting both P-wave and S-wave data offers
the ability to discriminate lithology, porosity,
fractures and possibly fluid content.
Integration with well control using both P-wave and
converted-wave data shows good correlation to natural gas production from the
Springer Formation at an approximate depth of 11000 feet. We observe changes in
both reflectivities that differentiate between
commercial and non-commercial gas wells. The multicomponent
data are integrated with the well control at 14 well locations penetrating the
Springer. Given the actual cumulative gas production at each well, the Hampson-Russell EMERGE algorithm used the multicomponent seismic data to predict the gas production.
Predicted gas production using both compressional
P-wave and shear converted-wave data is more accurate than using the P-wave
data
only.