G&G Services

Allton has a dedicated team of experienced geoscientists with mixed experience to evaluate technical challenges and follow up a project from feasibility and planning stage to acquisition and inversion. The team can assist the client with data interpretation and upgrade of the geological model or deliver inverted data to the client as final product.

Feasibility modelling

Sensitivity and recoverability studies can be carried out to evaluate the feasibility of a prospect. Input models are generated in close cooperation with oil company experts to optimize results and provide a founded recommendation. Time-domain CSEM modelling is performed in 1D, 2.5D and 3D.

Survey design

Survey layout and acquisition parameters are optimized based on modelling results to address the project specific objectives while also ensuring cost effectiveness.

EM Data Evaluation

After offshore data processing data attribute analysis is performed using Allton`s proprietary software. Extracted attributes are analyzed and the data conditioned before inversion.


The subsurface electrical resistivity distribution is recovered through inversion of the EM field data. Allton has 3D, 2.5D and 1D inversion algorithms for the CSEM time domain data. Inversions can be performed either unconstrained or constrained, where additional a priori information can be incorporated step by step. Standard workflows allow structural guiding of the inversion based on seismic data.

Allton have a cooperation agreement with CGG Multiphysics team in Milan to secure industry best deliverables.

Integration and interpretation

The inverted resistivity volumes will be combined with other geophysical data sets to achieve updated geological models with improved understanding of the subsurface.

Allton provides all the services above as part of a project from evaluation and design through acquisition, data QC, inversion and  update of the geological model. The client can also choose to use Allton for dedicated task in the process.

As part of the G&G Services is Allton also offering consultants on day rate for projects related to existing data EM data evaluation, second opinion work, project QC etc.

For more information contact Allton´s
CTO Dr. Svein Ellingsrud.  (+47) 48 12 54 12