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
imaging

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

CONTACT US


Contact us by opening an online inquiry.

Our Portfolio

OUR PORTFOLIO


View CGG's extensive portfolio of products and solutions.

OUR PRODUCTS


SEARCH

EITHER... search our portfolio of innovative solutions:

PRODUCT A-Z

OR... browse our alphabetical directory of geoscience products and services: