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Abstract

DOI:10.1306/13311442H43475

Prediction of Reservoir Fluid Composition Using Basin and Petroleum System Modeling: A Study from the Jeanne d'Arc Basin, Eastern Canada

Friedemann Baur,1 Ralf Littke,2 Hans Wielens,3 Rolando di Primio4

1RWTH Aachen University, Institute of Geology and Geochemistry of Petroleum and Coal, Aachen, Germany
2RWTH Aachen University, Institute of Geology and Geochemistry of Petroleum and Coal, Aachen, Germany
3Geological Survey of Canada (Atlantic) (GSC-A), Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada
4Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany

ACKNOWLEDGMENTS

We thank Ken Peters and an anonymous reviewer for their thoughtful corrections. We also thank D. H. Welte, who helped initiate the project. We thank Dave Hawkins from CNLOPB for the personal communication with him and the staff and to IES-Schlumberger for the PetroMod software. GFZ is thanked for the access to laboratory and office facilities during this study. Thanks are due the DFG for financial support of the project (grant Li618/21).

ABSTRACT

A petroleum system modeling (PSM) study was performed on the Jeanne d'Arc Basin, offshore eastern Canada, to study the constraints and reliability of the reconstruction of petroleum reservoir filling histories. Petroleum generation and phase behavior were analyzed using phase-predictive compositional kinetic models (PhaseKinetics) determined by pyrolysis of Egret Member source rock samples. Various additional calibration data (well, rock, and fluid data), such as porosity, permeability, temperature (bottom-hole temperature, apatite fission tracks, fluid inclusions), maturity (vitrinite reflectance), and petroleum properties, such as API, gas-oil ratio, formation volume factor, and saturation pressure were integrated into this model.

Different charge scenarios were tested for the effects of open and closed faults in the carrier system to reconstruct the most likely migration pathways for the petroleum that is trapped in the Terra Nova (TN) oil field. The most probable filling history includes charge to the reservoir from a local kitchen and a second kitchen located between Hibernia and TN that was responsible for the long-range migration. In the model, the hydrocarbons migrate from this kitchen in the northwest part of the study area along pathways defined by closed transbasin faults from the north into the field. This new migration concept differs from the traditional explanation based on geochemical measurements only von der Dick et al., 1989), which infers that local generation was solely responsible for filling the TN field. The latter can be disproved based on a simple mass balance calculation.

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