Ms. Rachael Mays


Ms. Mays has over 28 years of valuable petrophysical experience which was acquired worldwide in a variety of working environments. She has also worked as a senior consulting petrophysicist working a wide variety of both domestic and international projects for large national oil companies to small domestic operators. In addition, she is highly proficient at performing single well or full field reservoir studies integrating log analysis, core description, reservoir fluid properties, well test analysis, completion history, and production data. Ms. Mays has been fully responsible for the design and implementation of innovative log and coring programs, meeting all objectives while minimizing cost and risk.


Jan 2008 to May 2013 - Petrophysical Project Advisor, Anadarko Petroleum Corporation, Inc. (retired)

Provided petrophysical oversight for coring and logging operations in the Uinta and DJ Basins. Designed and developed core calibrated empirical petrophysical models for tight oil/gas Wasatch, MesaVerde, Codell, and DJ Sands and resource plays including Niobrara, Pierre, and Greenhorn Formations for use in exploration, field appraisal, development planning, and completion/production optimization.

Oct 2004 to Dec 2007 - Senior Consulting Petrophysicist, International Reservoir Technologies, Inc., Lakewood, CO

Conducted large and small petrophysical field studies for static and simulation modeling as well as single well analysis, operational support, and input into exploration programs.

Apr 2003 to Oct 2004 - Independent Petrophysical Consultant, Golden, CO

Performed petrophysical studies on a sub-contract basis for Canyon Investments, Inc. Studies include core calibrated petrophysical model of the granite wash sands, Anadarko Basin, Texas; statistical analysis of historic petrophysical data from a West Texas gas field, and development of petrophysical models for analysis of Pennsylvanian Canyon sand and Strawn limestone. 

Oct 1997 to Jan 2003, Senior Petrophysicist - Middle North Sea, West and East of Shetland, BP Exploration North Sea Aberdeen, Scotland, UK

Provided petrophysical support to BP North Sea business units as UK expat on projects involving infill drilling, off-take management, reservoir characterization and fluid surveillance. Permanent UK visa provided after 5 years on assignment. 

Nov 1992 to Oct 1997 - Production/Surveillance Engineer - Prudhoe Bay, BP Exploration Prudhoe Bay Reservoir Management, Anchorage, Alaska

Responsibilities include daily production optimization, reservoir surveillance, and well intervention planning and supervision. Supervised cased hole logging and well intervention operations on North Slope in 6-month rotational assignment. 

Oct 1989 to Nov 1992 - Petrophysicist - Infill Drilling and Reservoir Surveillance, BP Exploration, Anchorage, Prudhoe Bay Unit Reservoir Development

Jan 1987 to Oct 1989 - Petrophysicist . Exploration, BP Exploration, Houston, Louisiana/Texas Onshore Exploration

Dec 1985 to Jan 1987 - Petrophysicist . Production, Standard Oil, Houston, Gulf of Mexico Offshore Production

Dec 1981 to Aug 1983 - Geotechnical Engineer, Ueblacker Associates, Inc., Lakewood CO

May 1978 to Sept 1979 - Geochemist, Energy Reserves Group, Inc., Golden, CO, Minerals Division, Uranium Exploration


M.S., Geological Engineering, University of Alaska, Fairbanks, AK, USA
 Outstanding Academic Achievement Award, 1985

B.S., Geological Engineering Colorado School of Mines, Golden, CO, USA, 1982
Tau Beta Pi Honorary Engineering Academic Fraternity, 1981

Wichita State University, Wichita, KS, USA 1976 . 1978
 (Transferred before acquiring BS degree, 1979)

Phi Kappa Phi Honorary Academic Fraternity, 1979


Society of Professional Well Log Analysts, 12/85 to present
Denver Well Log Society, 9/03 to present
Society of Petroleum Engineers, 4/93 to 12/07



  • Designed and developed core calibrated petrophysical models of self-sourcing reservoirs including the
 Niobrara Formation in the DJ Basin with emphasis on porosity types, thermal maturity, and depositional

  • Designed and prepared petrophysical models for highly laminated and low resistivity pay reservoirs.

  • Expertise in the analysis of open and cased hole logs for fluid discrimination and saturation with applications in reservoir modeling, 4D seismic characterization, Sorg/Sorw determination, assessing
 EOR performance and well intervention opportunities.
  • Developed flow capacity based petrophysical models for optimizing completion design that resulted in significant cost reductions and improved production performance.
  • Performed daily production/injection monitoring and optimization, reservoir surveillance, and designed well intervention and logging program.

  • Developed cycle well modeling and optimization program for high GOR wells.

  • Designed and coordinated logging and analysis programs for horizontal, high angle, multi-lateral, coil tubing drilled, and through-tubing rotary drilled development wells utilizing new tool technology and deployment techniques.

  • Designed and coordinated coring and analysis programs including routine and special core analysis,
 resource play crushed rock analysis, mineralogical/elemental analysis, and thin section, SEM and nano-scale imaging.