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.