Migris has been conducting a hydrocarbon maturation, generation, migration, and leakage simulation study of the southern Norwegian Barents Sea. It is built upon its in-house Migri simulator technology and seismic interpretations from the PGS Barents Sea MegaProject.
Migri is a ‘next generation 3D hydrocarbon migration simulator’ which enables the evaluations of multiple alternative scenarios and sensitivities. Burial, maturation, generation, migration, and leakage are dynamically modelled through time in each scenario for a full 3-D basin model with 15 stratigraphic layers.
Probabilistic approaches applied
In this study probabilistic approaches have been applied in the numeric description of the source rock models (Cretaceous, Jurassic, Triassic and Permian source rock units), in the thermal history, hydrocarbon generation, migration and leakage modelling.
Database of 90 wells
A database of 90 wells has been used for the construction of the source rock model and maturity model calibration. A high-resolution OF-Mod source-rock model for Hekkingen in the Hammerfest Basin is included. All hydrocarbon migration models were calibrated to existing discoveries in the area, and best-fit ‘base case’ models have been deduced.
Monte Carlo simulation
Model sensitivities and key uncertainties are investigated through a Monte Carlo simulation technique and alternative migration and filling scenarios are presented.
All key results are available as digital maps and compiled report documents. The results from the sensitivity analysis and probabilistic basin modelling work is available at a lateral resolution of 800 m. Results from the ‘base case’ migration model runs are available at 400 m lateral resolution.
Seismic interpretations provided by PGS
The project results will be useful in assessing where to explore for prospective areas and elaborately contribute to the comprehension of the hydrocarbon charge systems in the region. Still, these results may be exploited further as copious input to your own dataset for detailed modelling of a licensed area or future prospect evaluation. Migris is the operator of this project and PGS has provided seismic interpretations as TWT maps. The project content includes:1. Geological model building and calibration data compilation.
2. Calibration of hydrocarbon maturities and creation of generation histories.
3. Calibration of migration scenarios that can explain fields and discoveries.
4. Uncertainty investigations with elaboration of alternative migration scenarios in different areas.
A report will be delivered in digital format (PDF/Microsoft Word/PowerPoint documents and some 3D animations). The final report highlights the methodology employed in each of the four work tasks. Important results are exported as grid files and included as project deliverables.
Database not included
The database used in the project will not be included as a deliverable. All seismic data and interpretations can be licensed separately from PGS. The underlying complete Migri model (in depth domain) may also be purchased separately.
Adapted from press release by Cecilia Rehn
Read the article online at: https://www.oilfieldtechnology.com/exploration/22122014/migris-releases-barents-sea-charge-study-built-upon-pgs-barents-sea-megaproject/