Refrac.net - BLOG
So what is Refrac.net? Refrac.net is a technical blog about fracturing and refracturing issues. The goal is to post new articles about once per week. Sometimes posts will be about technology that Reservoir Development is developing; sometimes posts will be reviews of papers in the literature; and sometimes posts will just be "water cooler" stuff about fracturing.
Blog readers should check back often to read the latest, and I encourage and want discussions through comments. Hopefully, we will learn from one another.
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Reservoir Development Consulting (RDC) was created to commercialize a new process for identifying, diagnosing, and stimulating bypassed or ineffectively-stimulated layers in wells producing from multiple layers. Refracturing success in wells with commingled production from multiple layers is mixed because the traditional approaches have been based on well performance and well restimulation as opposed to layer performance and layer restimulation. Using new technology developed at RDC, as well as the best approaches in the literature, RDC identifies refracture-candidate wells using a statistical approach, and diagnostic tests are performed in the candidate wells to evaluate layers for restimulation. The objective is to find and stimulate the 10% to 30% of the layers targeted for completion during the original stimulation that were ineffectively stimulated or inadvertently bypassed. All wells that used limited-entry fracture treatment designs are candidates. All wells that used induced-stress diversion are candidates. All wells that used just-in-time perforating designs are candidates. Although the vast majority of candidates are tight gas wells producing from multiple layers, the process/methods work in all oil or gas wells.
RDC pressure diagnostics can also be used in wells producing from a single layer to diagnose fracture properties, including fracture conductivity and fracture half-length, and diagnose fracture damage.
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Reservoir Development is owned by David P. Craig. Dr. Craig started working in the field of hydraulic fracturing on the back of a frac pump for the Western Company of North America in the summer of 1980. Dr. Craig earned a BS in petroleum engineering from Texas Tech University in 1989 and a MS in petroleum engineering from Texas A&M University in 1991. After rejoining The Western Company, which was merged into BJ Services, Dr. Craig resigned from BJ Services and joined Halliburton in Denver, Colorado in 1996. With the support of, and while working for, Halliburton, Dr. Craig earned a PhD in petroleum engineering from Texas A&M University in 2006.
Dr. Craig's research has always focused on hydraulic fracturing problems--fracture modeling, fracturing fluids, and reservoir engineering. His dissertation was entitled "Analytical Modeling of a Fracture-Injection/Falloff Sequence and the Development of a Refracture-Candidate Diagnostic Test," and it is Dr. Craig's expertise in fracture-injection/falloff interpretation and refracture-candidate diagnostics that led to the creation of Reservoir Development Consulting.
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