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Modeling Timing and Distribution of Biogenic Gas Generation in the Plio-Pleistocene Eridanos Delta, Dutch Offshore

Hanneke Verweij, Susanne Nelskamp, and Johan ten Veen
TNO, Utrecht, The Netherlands

Shallow gas accumulations in the Plio-Pleistocene Eridanos Delta deposits in the Dutch offshore may represent a valuable additional hydrocarbon source, especially if located near existing infrastructure. Shallow gas production in the Dutch offshore is still limited due to a lack of understanding of these gas systems. One of the requirements for understanding these gas systems concerns knowledge on the origin of the gas. The origin may be biogenic sources within the shallow strata or deeper thermogenic sources. We used a combination of modeling approaches for simulating the timing of biogenic gas generation and identifying the location of the charging areas of biogenic shallow gas in the Eridanos Delta deposits. These modeling efforts are part of ongoing integrated research aiming to assess a detailed 3D basin-scale model of the Eridanos Delta and its relation to shallow gas accumulations in time and space (Verweij et al., 2012). We will present preliminary results of the modeling study. The workflow developed during this study is also applied to investigate – paleo-generation of biogenetic gas as a source for shale gas accumulations.

AAPG Search and Discovery Article #120098©2013 AAPG Hedberg Conference Petroleum Systems: Modeling the Past, Planning the Future, Nice, France, October 1-5, 2012