Development and Verification of Degradable Sealing Elements for Fully Degradable Frac Plugs
- Shinya Takahashi (Kureha Corporation) | Masayuki Okura (Kureha Corporation) | Takuma Kobayashi (Kureha Corporation) | Takeo Takahashi (Kureha Corporation)
- Document ID
- Society of Petroleum Engineers
- SPE Asia Pacific Unconventional Resources Conference and Exhibition, 9-11 November, Brisbane, Australia
- Publication Date
- Document Type
- Conference Paper
- 2015. Society of Petroleum Engineers
- 2.5 Hydraulic Fracturing, 7.2.1 Risk, Uncertainty and Risk Assessment, 7.2 Risk Management and Decision-Making, 2 Well completion, 3 Production and Well Operations, 7 Management and Information
- Degradable, Rubber, Zone isolation, Sealing element, Multistage fracturing
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- 190 since 2007
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The continuing growth in demand for hydrocarbons has led to the increase in the stage count of hydraulic fracturing in unconventional reservoirs. A typical stimulation method is the plug-and-perf system, which uses frac plugs for zone isolation. Conventional plug-and-perf requires milling out to recover the flow path for hydrocarbons after fracturing is complete. Fully degradable frac plugs are in great demand to eliminate milling out, reducing the cost and risk of well completion, and extending the lateral length of wellbores. A key material for fully degradable frac plugs is a sufficiently degradable rubber with good sealing properties for the sealing elements of the plugs. This paper provides an overview of the material properties of the degradable rubbers that were developed by a comprehensive study of materials, and their suitability as sealing elements for degradable frac plugs. Nonlinear, three-dimensional multi-body contact analysis and qualification testing were integrated to design and test the sealing elements. The results indicate that the resulting sealing element will function at over 100 MPa without failing.
|File Size||1 MB||Number of Pages||10|
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