Delaware Basin Regional Study Bone Spring / Wolfcamp Formations
Analysis of 1304 wells
The Bone Spring to Strawn strata represents an extremely prolific resource play.
This study provides a petrophysical and geologic analysis of key wells in the Delaware Basin.
The Bone Spring to Strawn strata represents an extremely prolific resource play and this study provides a petrophysical and geologic analysis of key wells in the Delaware Basin. NuTech provides insight into the connectivity of textural attributes of the wells with NULOOK Shale Analysis, attribute mapping from NUVIEW, and formation brittleness and fracability identification from NUSTIM Geomechanical Analysis.
Delaware Wolfcamp (Wolfcampian): Behaves as a reservoir and source rock due to ideal mineralogy and grain size distribution. Industry publications cite mineralogy at 50-90% quartz and carbonate, with 10% clay. Other stats include a pressure gradient of 0.7 psi/ft, porosity around 5-9%, and TOC about 2-5%.
Avalon Shale (Leonardian): Organic-rich shale and siltstone lying in between the top of the Bone Spring Formation and the top of the First Bone Spring sandstone. In Loving County, Avalon net pay is up to 600 feet thick. The shale has good TOC at 5-6% with low permeability generally less than .1md and production occurs where logs indicate high gamma ray (>75u). Porosity is around 16-18% and contains 105 MMBOE in place per section.
Bone Spring (Leonardian): The entire Bone Spring group averages roughly 3,500 feet thick. It can be subdivided into alternating carbonate and clastic (sand) members deposited in slope and basin settings. This reciprocal sedimentation is thought to be the result of sea level changes where carbonates were deposited in transgression (high stand) and clastics in regression (low stand).