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Structural traps and hydrocarbon exploration in the salt range / Potwar plateau, north Pakistan.
Author(s)
Ishtiaq A. K. Jadoon Schlumberger, Data & Consulting Services, Islamabad, Pakistan
Wolfgang Frisch Institute of Geosciences, University of Tabingen, Germany
Saeed K. Jadoon Oil and Gas Development Company Limited, Islamabad, Pakistan
Abstract
Hydrocarbons are discovered from compressional structural traps in the Salt Range/Potwar Plateau. Interpretation of industry seismic profiles suggests thin-skinned deformation of platform strata above a decollement in the Eo-Cambrian evaporates. Structural studies show the development of traps as fold-and-thrust structures of variable geometries and shortening in the system. Structural analyses with balanced cross-sections shows the presence of fault-related folds, pop-ups, and triangle zones, all with limited calculated shortening as favourable traps. Fault analysis with a stratigraphic separation diagram shows that structures with blind faults and shortening up-to 4­5 km 2 km, such as the triangle zones, may serve as most productive prospects. Whereas, the emergent thrusts, such as the Khairi-Murat thrust, with shortening > 10 km are most likely tend to breach a trap, unless a favorable geometry (duplex, piggy-back thrusts) for the entrapment of hydrocarbons is present. Deformation is interpreted to have occurred during the last 8 Ma in the Salt Range/Potwar. Plateau. The timing of development of the discovered oil-fields is calculated as 3.5 to 1.8 Ma. This paper is an attempt to review structural geometries and kinematics of oil-field structures combined with sedimentation and magnetostratigraphy for hydrocarbon exploration in the Salt Range/Potwar Plateau.
Publication Details
Page(s) 69-83
DOI DOI not available
Published Journal: Proceedings SPE-PAPG Annual Technical Conference, Volume: 0, Issue: , Year: 2008
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