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SWLGS Luncheon Topics

Updated August 05, 2003

October 2001

Liuhua 11-1 Field, South China Sea: A Shallow Carbonate Reservoir Developed using Ultra high- Resolution 3-D Seismic, Inversion, and Attribute-based Reservoir Modeling
Chip Story

Abstract Summary: 

The Liuhua 11-1 Field, located 130 miles southeast of Hong Kong in 1000 feet of water, is a vuggy carbonate reservoir at shallow depths (3850 feet subsea), producing 16-22 degree oil under a very strong bottom-water drive. The field was discovered in 1987 and is currently being developed with twenty-five long-radius horizontal wells. Project success is dependent on limiting water production and on well productivity, which in turn makes an accurate reservoir description critically important.

To better define reservoir heterogeneity, a 3-D seismic survey of the Liuhua field was acquired in July 1997. A very high-resolution dataset (200+ Hz) was obtained, and has been used in an integrated field study to evaluate the future exploitation potential of the reservoir.

The drilling data and seismic data over Liuhua were integrated to obtain detailed maps of reservoir structure and stratigraphy. Petrophysical data and modeling coupled with seismic inversion were used to obtain a 3D spatial distribution of reservoir properties (porosity, permeability, and saturation). Coherence technology was used to map faults, fractures, and karst dissolution phenomenon in the reservoir. Complex attribute analysis added an additional understanding of rock matrix continuity. This information was used to build reservoir characterization and simulation models via several commercial and proprietary software systems. These models were tuned and validated using well history matching and used to predict future reservoir performance.

Biographical Sketch: Chip Story spent 25 years with Amoco Corporation working as a geophysicist in a number of domestic and international onshore and offshore projects. He is currently involved with a new startup exploration company as an officer. His professional interests involve 3-D seismic interpretation, visualization, and reservoir characterization technology. Chip holds active membership in the Geophysical Society of Houston and the Society of Exploration Geophysicists.