--> Abstract: Marrat Oil Field, a Unique Jurassic Reservoir in the Partitioned Neutral (Divided) Zone Between Kuwait and Saudi Arabia, by Osama A. Al-Shaarawy, David Barge, and Ali Abul-Hassan; #90082 (2008)

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Marrat Oil Field, a Unique Jurassic Reservoir in the Partitioned Neutral (Divided) Zone Between Kuwait and Saudi Arabia

Osama A. Al-Shaarawy, David Barge, and Ali Abul-Hassan
Field Devlopment & Exploration, Joint Operations Group, Ahmadi, Kuwait

The Humma Oil Field is situated in the southwestern corner of the Partitioned Neutral (Divided) Zone between Kuwait and Saudi Arabia. It is the only Jurassic producer in the PNZ. It was discovered in 1998 following several unsuccessful wells targeting Cretaceous reservoirs beginning in the 1950's.

An integrated approach utilizing 3D seismic interpretation, oriented core data, open hole logs, FMI (Formation Imaging Tools), CMR (Combinable Magnetic Resonance), ECS (Elemental Capture Spectroscopy), and Stonely Permeability (DSI) data was used for the evaluation and understanding of the complexity of the Jurassic Marrat reservoirs in the Humma Field.

Both kinematics and dynamic analyses for the Humma structures revealed that the NNW-SSE structural axial trend for the Humma closure is in-parallel with the major fault that bounds the structure, and the NE-SW to NW-SE oriented open fractures are the manifestation of a dextral strike slip wrench tectonics depicting a simple shear tectonic model. The tectonic evolution of the Humma structure was initiated in the Late Jurassic Kimmeridgian, culminated during the Early Cretaceous and continued throughout the Late Cretaceous.

The simple shear tectonic model applied to the Humma Field is well expressed by a flower structure associated with both Jurassic Marrat and Cretaceous Thammama Group, Shuaiba Formation as interpreted from the 3D seismic, the oriented core, and FMI data. The tectonic model applied herein is believed to exist and can be applied elsewhere in the Gulf Region. The data integration, assimilation and analysis approach proposed in this paper is recommended for similar complex reservoir studies in other parts of the Gulf Region.

AAPG International Conference and Exhibition, Cape Town, South Africa 2008 © AAPG Search and Discovery