An Integrated Approach To Design Completions for Horizontal Wells for Unconventional Reservoirs
- Rachna Jain (ExxonMobil Production Company) | Shivani Syal (ExxonMobil Production Company) | Ted A. Long (ExxonMobil Production Company) | Robert C. Wattenbarger (ExxonMobil Production Company) | Ivan J. Kosik (Esso Australia, Pty. Ltd.)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- April 2013
- Document Type
- Journal Paper
- 1,026 - 1,032
- 2013. Society of Petroleum Engineers
- 5.2.2 Fluid Modeling, Equations of State, 5.8 Unconventional and Complex Reservoirs, 2.0 Well Completion
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This paper presents a comprehensive and integrated workflow to design completions for a heavy-oil recovery process that involves injection and production through the same well. Unlike in traditional completion design, the transient effects are particularly important to consider while analyzing the long-term performance for these types of completions to capture the effect of variations or uncertainties in reservoir and fluid-flow characteristics over time. The proposed integrated workflow involves initial screening and selection of flow-restricting completions that can meet the desired injection and production performance based on a detailed wellbore hydraulics modeling tool. A select few completions are then analyzed for longer-term performance using a reservoir simulator that couples the flow-restricting nature of completions with flow in the reservoir. The use of best-in-art wellbore hydraulics model and reservoir simulator in a staged process yields an effective way to assess and optimize the completion design for these wells in a reduced time span. The workflow disclosed here can be used to design effective completions for a broad class of cyclic liquid-injection methods for heavy-oil resources.
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