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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
Abstract
5. Interactive Charge Modeling of the Qatar Arch Petroleum Systems
Zhiyong
He and Thomas A. Berkman
1ARCO Exploration Technology and Operations, Plano, Texas, U.S.A.; Current address: ZetaWare, Inc.
2ARCO Latin America, Plano, Texas, U.S.A.; Current
address: BP Exploration and Production Inc.
ACKNOWLEDGMENTS
We thank ARCO and Qatar General Petroleum Company for permission to publish this study. We also thank William Hughes and Erik Tegelaar for their work on geochemical analysis.
ABSTRACT
An easy-to-use map-based charge modeling package was used to model the history of petroleum generation, migration
, and accumulation. The system can be used to simulate maturation and
migration
interactively at high horizontal resolution and is amenable to limited input data sets (e.g., one map and few wells).
Migration
modeling based on the Hith structure surface, which mimics the top Arab reservoir, shows that small-scale variations of the structure surface affect
migration
patterns. Focusing by these minor features resulted in meandering
migration
channels as well as large areas of "
migration
shadows." Active shows and production on or near the
migration
"channels" and wells that are characterized by poor shows and lacking production in the
migration
shadows confirm these features. The estimated
migration
patterns are also consistent with geochemical analyses that demonstrate the existence of several oil families across the arch. Each of these oil families resides in a separate fetch area that is defined by the
migration
modeling.
The consistency of the modeled migration
pathways with test data, field distribution, and geochemical analysis makes it possible to use the modeling results in high-grade exploration prospects/areas. The calculated charge volumes for existing fields are very close to in-place reserves, indicating that charge volumes may be accurately estimated with the modeling technique as well.
Considering the effects of hydrodynamics, the estimated location of accumulation in the Cretaceous Shuaiba Formation coincides with existing production from the Al Shaheen field, which is located northeast of the structural crest.
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