There seems to be a lot of confusion in the industry over the risk of perforation tunnel failure and the risk of sand production. I think many companies are using static/elastic rock failure models. These models are very conservative and don’t consider the plastic behavior of rocks. Also they are applying static stress models to transient pressure events. What happens in the first seconds after perforating is important for perforation clean up, but has little impact on general rock mechanics and perforation tunnel failure. Has anyone else seen companies mistakenly linking transient events to static sanding models? Any comments?….

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