Yegua Regional Study


The focus of the study is on the geological, petrophysical, engineering and completion aspects of Yegua sandstones. A total of 3,668 feet of conventional core from thirty-four (34) wells were analyzed and evaluated with respect to:

  • Depositional environments
  • Paleontology
  • Reservoir petrography and mineralogy
  • Diagenesis
  • Petrophysical properties
  • Log evaluation
  • Engineering and completion

These data and interpretations are compiled for each well and are included along with an overview of the study’s findings in a final report. The results of this study will significantly aid geologists, petrophysicists, and engineers in their Yegua exploration and exploitation activities.

The study provides detailed geological, petrophysical, and engineering characterization and evaluation of Yegua sandstones. Specifically, the following data and interpretations are provided:

  • Core description, core photography and interpretation of depositional environments along with the construction of depositional models for predicting sandstone geometries and trends
  • Paleontological data for both age determination and paleo water depth
  • Sandstone properties, such as texture, composition, mineralogy, pore system characteristics, and diagenesis from the analysis of thin section petrography, SEM, and X-ray diffraction
  • Petrophysical data that includes porosity, permeability, grain density, porosity as a function of confining stress, specific gas permeability as a function of stress, specific brine permeability at stress, formation factor, cementation exponent, resistivity index, saturation exponent, effective gas permeability, immobile water saturation, capillary pressure, and cation exchange capacity
  • Log evaluation with a comparison and calibration of log-derived petrophysical properties to core petrophysical properties
  • A review of engineering and completion practices along with recommendations for such procedures in light of pore system properties, diagenetic clays, and compatible completion fluids

A regional overview and summary of the study’s findings with emphasis directed towards application to current exploration and exploitation activities in the trend.

  • Thirty-four (34) wells
  • Conventional cores
  • Jackson Co., TX to Calcasieu Parish, LA
  • Available in RAPIDLink™