How To Use and Misuse Proppant Crush Tests: Exposing the Top 10 Myths
- Terrence T. Palisch (CARBO Ceramics) | Robert Duenckel (CARBO Ceramics) | Mark Aaron Chapman (CARBO Ceramics) | Scott Woolfolk (CARBO Ceramics) | Michael Vincent (Insight Consulting)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- August 2010
- Document Type
- Journal Paper
- 345 - 354
- 2010. Society of Petroleum Engineers
- 2.5.1 Fracture design and containment, 2.5.2 Fracturing Materials (Fluids, Proppant), 4.1.2 Separation and Treating
- Production and Operations
- 2 in the last 30 days
- 880 since 2007
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When the American Petroleum Institute (API) established standardized crush-testing procedures (API RP-56 1983), the committee indicated that the test results should "provide indications of the stress level where proppant crushing is excessive and the maximum stress to which the proppant material should be subjected." However, over time, many have forgotten not only how the test is conducted, but also its original intent. As such, many now unintentionally misapply the results of crush testing as they select proppants for their fracture designs.
This paper will review the top 10 myths associated with crush testing and its interpretation, addressing such common questions as
- Do standard test conditions (high proppant concentration and low temperature) provide realistic predictions of proppant performance?
- Should proppant be tested wet or dry?
- Does the loading procedure affect crush?
- What happens if proppant is not distributed uniformly in a fracture?Do all proppants fail in the same manner?
- Are all proppant types equally damaged by 5% crush?
- How can the industry misuse the test to report "superior" results?
Readers of this paper will be armed with a better understanding of how crush testing is performed, how crush results can be misapplied, and the correct use of crush-test results. In addition, the authors will present an alternative methodology for evaluating proppant that incorporates all of the benefits gained from crush testing, but avoids the common pitfalls. Armed with this information readers can improve the design of fracture treatments, thereby achieving increased production rates and superior economic returns.
|File Size||580 KB||Number of Pages||10|
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