Least-Squares Migration

Least-Squares Migration provides images with better balanced illumination, improved signal-to-noise ratio, reduced migration artifacts and more interpretable seismic amplitudes. Implementation of a Least-Squares Q-PSDM sequence corrects for absorption and related illumination effects, mitigating artifacts and noise.

We have successfully applied Least-Squares Migration to datasets from all over the world, including areas of complex geology such as subsalt in the Gulf of Mexico. Least-Squares Migration also brings benefits to challenging time-lapse projects, especially for highly non-repeatable vintages or prospects with weak 4D signal.

Delivering superior

On this BroadSeis dataset from our Cornerstone survey in UK Central North Sea, Least-Squares Q-PSDM (bottom image) provides a higher resolution image, along with improved illumination balance, reduced migration swing noise and better event continuity when compared to conventional imaging (top image).

Conventional imaging
Least-Squares Q-PSDM

Applications of least-squares pre-stack depth...

Shouting Huang | Zhao Wang | Ming Wang | Adel Khalil | Ping ...
©2017 EAGE

Least-squares Q migration: the path to improv...

Guangfu Shao | Dongping Zhuang | Rongxin Huang | Ping Wang (...
©2017 SEG

Improving Subsalt Imaging with Least-squares ...

Shouting Huang | Merlin Wang | Bing Bai | Ping Wang
©2017 EAGE
Subsurface Imaging - Q Tomography

Q Tomography

Build accurate models of amplitude and phase anomalies, then compensate for their effects using Q PSDM.
Subsurface Imaging - RTM

Reverse Time Migration

Create accurate seismic images in the most complex of geological environments.

Subsurface Imaging - FWI

Full Waveform Inversion

Reveal intricate velocity details for the clearest images. Harness seismic low frequencies from BroadSeis, StagSeis, seabed and land data.

Subsurface Imaging


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