Reservoir Engineering and Geological data gathered from 22 years of production from the Fateh Ilam reservoir and from almost 200 wells cannot be reconciled using existing reservoir and geological models. Prior to building a full field model to evaluate further development of the waterflood and potential for future infill drilling, a better understanding of the reservoir is required.

Recent re-characterisation of the reservoir is described and results are summarized from a fully integrated reservoir study that showed the Ilam to be both complex and heterogeneous. Examination of the core and log data revealed orientable fractures that, following detailed analysis, were seen to be crudely related to lithology. The study also shows that the wide range of pressure transient characteristics and anomalous production and waterflood behavior observed in the Ilam can be explained using a simplified model consistent with these findings.

Keywords:
apparent fracture half length, transient response, layer 1, linear flow, stress direction, permeability, layer 2, fateh field, upstream oil & gas, constant pressure boundary
Subjects:
Hydraulic Fracturing, Well & Reservoir Surveillance and Monitoring, Reservoir Characterization, Reservoir Fluid Dynamics, Improved and Enhanced Recovery, Reservoir Simulation, Formation Evaluation & Management, Unconventional and Complex Reservoirs, Information Management and Systems, Exploration, development, structural geology
Copyright 1992, Society of Petroleum Engineers
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