PrecisION Seismic Inversion for Prestack/Poststack Center/Brochure… · iongeo.com...
Transcript of PrecisION Seismic Inversion for Prestack/Poststack Center/Brochure… · iongeo.com...
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PrecisION—COMPRESSED SEISMIC INVERSION FOR HIGH RESOLUTION SUBSURFACE IMAGE
A standard application for many seismic workflows, seismic inversion has traditionally been an essential tool for both
determining risk and better understanding lithology and fluids. To build on the industry’s growing requirement for
better subsurface images, ION has developed PrecisION, a new compressed, sparse-spike, seismic inversion tool that
delivers an efficient way to address noise and preserve signal in both advanced and broadband processing flows.
PrecisION moves beyond the limitations of traditional deterministic inversion methods to support realistic modeling of
subsurface conditions, while also visually providing the geophysicist “risk” indicators that ensure that they can
confidently derive the lithology and fluid parameters in their zone of interest.
UNIQUE PRECISION SEISMIC INVERSION CHARACTERISTICS
Wide-Application Lithology Determination
While inversion approaches have historically treated the seismic reflectivity model as Gaussian distributed, these
approaches come with some inherent limitations in their application to stratigraphic or structural rock conditions.
PrecisION treats the reflectivity of seismic events as Laplacian which is more universally applicable in both marine
and land environments. This results in better Earth reconstruction even in geologic areas that face either sharp
boundary or subtle gradient changes.
Visual and Quantifiable Risk and Uncertainty Analysis
While the geoscientist can often find himself facing problematic calculation of rock property parameters like density,
PrecisION is designed to deliver a quantification of the risk inherent in the inversion results. ION’s approach is to
produce not just the most-likely solution but the range of possible solutions. In addition, displays exist that give the
geophysicist visual verification of the reliability of the inversion results.
Computational Efficiency
PrecisION uses a novel inversion approach that can be applied to both pre-stack and post-stack seismic for amplitude
variation with offset/angle gathers. Because of the robust algorithm design, the application is able to work on large
prestack volumes efficiently while simplifying any noise removal requirements.
Optimized for Broadband Processing and Tomography Workflows
Recent advances in broadband processing coupled with ION’s improvements in: waveform inversion, general moveout
tomography, and high frequency RTM, allows PrecisION to extend the bandwidth of the inversion results to
encompass the full bandwidth available in the seismic data. This provides the geophysicist with the ability to utilize
valuable lower frequency information from the seismic data to supplement the information from the low-frequency
background models.
PrecisION™ | Seismic Inversion for Prestack/Poststack
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WORKKFLOW BENEFITS OF PrecisION
→ Prospect/Portfolio Assessment
→ Lithology/Fluid Identification & Analysis
→ Completion Design (Geomechanical–Rock Frackability)
PROJECT BENEFITS OF PrecisION
→ Efficient delivery of seismic inversion work (impedence volumes, etc.)
→ Geologically-honored subsurface reconstruction
→ Ensures that all available project data seismic and log broadband, can be integrated within the project
→ Provides quantifiable uncertainty estimates
→ Optimized for broadband workflows to ensure the full spectrum of seismic/wavelet is contributing
to Earth model
Impedence volume comparison:
The display on the left shows
conventional inversion technique
with the display on the right showing
PrecisION’s inversion volume.
The higher resolution geologic
information is due to PrecisION’s
algorithm design coupled with
WiBand processing and High
Frequency Reverse Time Migration.
PrecisION provides an easy to use
risk quantification between well and
seismic tie relationships that can
be graphically presented to best
understand the level of confidence
the geophysicist might have in his
correlation of data.