Imbibition and Water Blockage In Unconventional Reservoirs: Well-Management Implications During Flowback and Early Production
- Antoine Bertoncello (Total EP USA) | Jon Wallace (Hess Corporation) | Chris Blyton (University of Texas at Austin) | Mehdi Matt Honarpour (BHP Billiton) | Shah Kabir (Hess Corporation)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- November 2014
- Document Type
- Journal Paper
- 497 - 506
- 2014.Society of Petroleum Engineers
- well resting, imbibition, water blocking, unconventional reservoirs
- 15 in the last 30 days
- 1,257 since 2007
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Driven by field logistics in an unconventional setting, a well may undergo weeks to months of shut-in after hydraulic-fracture stimulation. In unconventional reservoirs, field experiences indicate that such shut-in episodes may improve well productivity significantly while reducing water production. Multiphase-flow mechanisms were found to explain this behavior. Aided by laboratory relative permeability and capillary pressure data, and their dependency on stress in a shale-gas reservoir, the flow-simulation model was able to reproduce the suspected water-blocking behavior. Results demonstrate that a well-resting period improves early productivity and reduces water production. The results also indicate that minimizing water invasion in the formation is crucial to avoid significant water blockage.
|File Size||1 MB||Number of Pages||10|
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