Midland Basin – Spraberry

Spraberry Play Map

Spraberry Horizontal Production


The graphic above presents cumulative Midland Basin oil production for all horizontals completed since 2008 in the Spraberry. The Wolfcamp is typically divided further into four intervals:

  • Upper Spraberry (“UPPER SPBY”) – An inter-bedded sandstone, this interval is the least-targeted of the four Spraberry zones.
  • Middle Spraberry (“MID SPBY”) – Development of this shale interval has been limited relative to the Lower Spraberry, but there have been a number of Middle Spraberry tests in the western portion of the Basin (Midland and Martin Counties).
  • Jo Mill (“JO MILL”) – This inter-bedded sandstone is between the Middle Spraberry and Lower Spraberry intervals, and is characterized by lower resistivity relative to the zones above and below. Like the Middle Spraberry, most tests of this zone have been in the western portion of the Basin (Midland and Martin Counties).
  • Lower Spraberry (“LWR SPBY”) – This shale interval has been the most heavily targeted member of the Spraberry for horizontal development. Strong producers have been completed in numerous Counties within the Basin. However, the target thins to the South and Original Oil-In-Place decreases materially. As a result it is not currently a target in Reagan, Irion, or Crockett Counties.
Methodology Overview

VSO reviewed and correlated formation tops across more than 600 digital and raster open hole logs throughout the Midland Basin. We subsequently created and QC’d structure maps for all key intervals within the Basin. After analyzing the placement of each horizontal wellbore relative to our structural interpretations, landing benches were assigned for all wells.

Reservoir & Geologic Studies

VSO has completed extensive analysis of well performance and productivity throughout the Midland Basin. Additional reservoir and geologic capabilities include:

Assessment of Development Potential and Risks

Type Well Analysis

Evaluation of Well Performance and Interference

Midstream/Supply Studies

Audits/Evaluations of Producing Assets

Key Cross-Sections

Reservoir Quality Maps – Porosity, TOC, OOIP

Upside development Reservoir Quantity Maps – Gross and Net Isopachs

Pressure Trends

Maturity & GOR Impacts