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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.