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Petroleum Geoscience

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Improved hydrocarbon charge prediction by source-rock modelling

¹ SINTEF Petroleum Research AS, S.P. Andersens vei 15B, 7465 Trondheim, Norway
² Present address: Migris AS, PO Box 1273 Pir-senteret, 7462 Trondheim, Norway (are.tommeras{at}migris.no)

Predictions of initial source-rock distribution, thickness and quality are key input parameters to quantitative basin models. This article describes a workflow where process-based modelling of deposition and preservation of organic matter at basin scale is performed to provide the input to modelling of hydrocarbon generation and expulsion from source rocks. As the vertical resolution of the depositional- and source-rock models is significantly higher than for conventional basin models, a means of upscaling the source-rock properties is needed when providing these as input to hydrocarbon generation modelling.

To illustrate the modelling workflow, an example from the Triassic Kobbe Formation of the Norwegian Barents Sea was used. Two alternative source-rock models for the Kobbe Formation were constructed and discussed. During the modelling process preservation conditions were fine-tuned to better match local well data within the Nordkapp Basin. The second model provided a better calibration both for the source-rock model to the well data and for the secondary migration model to known hydrocarbon accumulations of the Nordkapp Basin.

KEYWORDS: hydrocarbon charge, source rock modelling, Barents Sea, Triassic

This article has been cited by other articles:

				H. Ligtenberg and F. Neves Integrating disciplines for petroleum system analysis - from seismic interpretation to stratigraphic and basin modelling Petroleum Geoscience, August 1, 2008; 14(3): 219 - 221. [Full Text] [PDF]