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Simultaneous Joint Inversion

Integrate independent geophysical measurements into one consistent, comprehensive model

Integrate datasets

The simultaneous joint inversion (SJI) of multiple geophysical datasets (e.g., seismic and gravity, and seismic and magnetotellurics) is a new technology that allows integration of different geophysical datasets at the inversion level. SJI collects seismic and nonseismic information into a single-objective function to be inverted.

Advantages of the SJI approach include

reduced uncertainty in the interpretation result through integrating independent geophysical measurements into a consistent earth-property model
mitigated weaknesses of each single domain dataset through the strengths of the other dataset(s).

Actual workflow from the Walker Ridge, Gulf of Mexico MT+seismic SJI project.

Actual workflow from the Walker Ridge, Gulf of Mexico MT and seismic SJI project.

Improve imaging capabilities

SJI is particularly useful in subsalt, subbasalt, and subthrust areas, where seismic imaging faces serious problems because deep illumination can be limited. In those cases, SJI used in the framework of a depth imaging workflow provides extended capabilities for resolving complex velocity fields in conditions of poor signal-to-noise ratio.

The slider image shows a comparison between benchmark reverse time migration (RTM) and post-SJI RTM data. The red circle outlines a particular area of improvement.

SJI examples

We offer 3D SJI of the following combinations of geophysical measurements (with the corresponding main applications):

Reflection seismic and MT: subsalt, subbasalt, carbonates
Reflection seismic and gravity or full-tensor gravity (FTG): overthrusts, subsalt, subbasalt
Reflection seismic and refraction: depth imaging
Refraction seismic and surface waves: complex near-surface modeling
Refraction seismic and gravity or FTG: near-surface characterization.

Earth Model Building Services

Unified earth models with greater confidence and efficiency

Improve geophysical processing and interpretation for high-resolution images placed correctly in depth.

Quantitative Analysis of Seismic Uncertainty

Earth model uncertainty assessment

Reduce event uncertainty in oil and gas reservoirs with quantitative analysis.

Common Image Point (CIP) Tomography

High-resolution, multiscale, anisotropic hybrid tomography

Produce accurate, high-resolution, anisotropic Earth models in any geologic environment.

SWAMI

Surface wave analysis, modeling, and inversion

Combine multiple geophysical and geological measurements to improve reservoir characterization.

EM Data Processing & Interpretation

Integrated EM, seismic, and other measurements

Reduce risk and increase confidence in subsurface interpretations.

Seismic Inversion Services

Inverse modeling techniques and specialist reservoir knowledge

Address acoustic and elastic inversion, rock physics analysis, and reservoir property modeling.