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Articles by D. D. Cramer
Four Real-World Challenges in Hydraulic-Fracture Modeling
The development of theoretical hydraulic-fracturing models started several decades ago, setting a basis for hydraulic‑fracture design, optimization, and diagnostics. As a reservoir stimulation technique, the problem of hydraulic fracturing in essence is the prediction of the geometric shape and dimensions (length, width, and height) of the growing fracture as a function of time.
Getting Your Perforations in a Line Can Mean More-Productive Fracturing
Want more production from a shale well? Consider lining up the perforations. A handful of speakers at the recent SPE Hydraulic Fracturing Technology Conference talked about improved fracturing results with oriented perforating—shooting the holes at the same place in the casing, often the top. This breaks from designs that arranged the holes in a helical pattern with each charge angled 60° from the previous one.
ConocoPhillips’ Water-Hammer Analysis Highlights Potential for a Complex Data Set
It has often amounted to little more than background noise. Now, engineers with one of the largest shale producers in the US consider the water-hammer signal to represent a potential trove of insight into stimulation performance. ConocoPhillips has spent almost 3 years developing a new approach to water-hammer analysis and recently shared the first public details of that work in a technical paper (SPE 204154).
Rethinking Fracturing at the Point of Attack
Rethinking Fracturing at the Point of Attack This illustration shows a jet charge detonating and then forming a jet that will punch a consistently sized hole perforating the casing, cement, and formation. Paul Weddle describes himself as a “perforation geek.” The completion manager for Liberty Resources is among a small group that has an obsessive interest in all the details that can alter the performance of the openings blasted through casing, cement, and into rock during hydraulic fracturing.
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