Profile

GEOS4 Profile

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Built on the 60+ years combined experience of its co-founders, GEOS4 consults to the fossil energy sector. We specialise in compositional kinetic models, phase prediction and polar compound geochemistry within geological contexts. For the client, all of this translates into defining oil- versus gas-plays, delineating sweet spots and identifying likely production problems. New energies now feature in our portfolio. We have developed kinetic models for assessing the quantitative significance of natural hydrogen generated from organic matter at high levels of thermal maturity.

There is no hype; there are no black boxes. We bridge the research-service divide, working with our customers via on-site placement and/or online networking. As a result, we can proudly boast a list of clients that includes some of the world's largest and smallest energy companies.

Portfolio

Conventional petroleum systems

In conventional petroleum systems, predicting gas‐oil ratio and charge volumes (gas and/or oil) ahead of drilling is a key element of exploration strategy.

We predict bulk petroleum composition (e.g. paraffinic or mixed base, high or low wax, high or low sulphur) and physical state (number of phases, Psat, API gravity) using the PhaseKinetics approach, which generates 2-, 4- and 14-component compositional kinetic models, utilising low maturity source rocks, as well as asphaltenes in seeps, stains and produced oil. These purpose‐built models are ready for direct import into Petromod®.

Kinetic parameters for oil‐to‐gas cracking also assist in constructing regional petroleum system definition, distinguishing liquid and gas potentials.

Shale plays

Petroleum produced from low permeability shales is different to the dispersed in-situ fluids from which it is derived. Whereas in-situ fluids consist of hydrocarbons, resins and asphaltenes in proportions governed by organic matter type, maturity and retention behaviour, the produced fluids are highly enriched in hydrocarbons and low polarity non-hydrocarbons and show an enhanced GOR.

We evaluate the extent of fractionation during production by predicting in-situ bulk composition using PhaseSnapShots and comparing phase envelope geometry with PVT-reports.

New energies

In recent years hydrogen has emerged as a fundamental component of the clean energy mix needed to globally secure sustainable energy, though until very recently the natural occurrence of molecular hydrogen has been overlooked.

We have published kinetic models for the generation of H2 from highly overmature organic matter in source and reservoir contexts. Here we offer to revisit exploration acreage, applying these models using basin modelling to quantitatively assess H2-resource potential, as well as that of late hydrocarbon gas.