OCTOBER 2018 LUNCHEON MEETING
Pukar Mainali
of Premier Oilfield Group
presents
The Application of Whole-Rock Elemental Data from Drilled-Cuttings for Optimum Stage Designs in Unconventional Reservoirs
11:30 AM Wednesday, October 17, 2018
at the Cascades
4511 Briarwood Road
Tyler, TX 75709
Cost: $20
ABSTRACT
The Application of Whole-Rock Elemental Data from Drilled-Cuttings for Optimum Stage Designs in Unconventional Reservoirs
Pukar Mainali(1), Mark Andreason(2), Frank Zamora(1) and Mike Dix(1)
Premier Oilfield Group(1), Castleton Resources(2)
The use of elemental data from drilled cuttings has proved to be highly effective in delineating target intervals, horizontal well placement, geo-steering the lateral, and more importantly providing accurate formation evaluation of the drilled section. Furthermore, elementally-derived modeled minerals, modeled organic richness and relative brittleness allows for optimum completions designs that better group rocks of like attributes within the same frac stages.
Industry began testing modified completions in the Haynesville play with very encouraging results especially during the latter half of this decade. Some of the changes made are longer laterals, increased proppant concentration, and decreased stage size while increasing cluster spacing. Despite these changes, studies have shown that less than 65% of the perforation are contributing to the geometrically-designed completions, but a significant perforation efficiency improvement has been observed using the engineering design completions (Schlumberger, 2017).
Mineralogy-based engineering completion is based on the principle that frac stages with similar rock characteristics treat differently during hydraulic fracturing. In general, minimizing mineralogical variation in each stage resulted in treatment execution closer to design with regards to treating rate and surface treating pressure. Jobs that were perforated based on mineralogical similarities resulted in fewer operational issues when compared to the geometrical stages from an adjacent well in a pad-drilling scenario.