Reservoir Services - Inversion/Rock & Fluid
Properties
 To find oil and gas in most plays, it is no longer sufficient to interpret from conventional reflectivity seismic. It is vital to know much more about both the rock and fluids before drilling. Advanced techniques, including Geotrace's RockRes®, which uses pre-stack inversion to rock properties to better define prospects, make it possible to get oil and gas into your pipeline much sooner, and at higher rates.
Case
Study: Nile Delta Reservoir using a Novel Broad Band Pre-stack
Seismic Inversion to Rock Properties Technique
Pre-stack migrated gathers and existing wells are input to this
process, which takes advantage of the amplitude and waveform changes
with offset to arrive at estimates of P-wave velocity, shear-wave
velocity, density, acoustic impedance, Poisson’s ratio,
bulk modulus, Lame’s modulus and Young’s modulus.
These provide essential insight into lithology, porosity and fluid
content.
Geotrace has developed proprietary techniques, including definitive
bandwidth-extending algorithms, to achieve spectacular images,
even in challenging thinly bedded (± 20 ft) reservoirs,
and in some of the deepest plays.
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This image, from Breton Sound, state waters
Louisiana, shows geobodies corresponding to probable gas pay
sands. These include the combined qualities of high Young’s
modulus, low density and low Poisson’s ratio from 3D
cross-plotting after RockRes®. |
*Seismic data owned or controlled by Seismic Exchange, Inc.;
inversion performed by Geotrace for Cs Solutions, Inc.
 Acoustic Impedance and Gradient Impedance Inversion (AI-GI Inversion)
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