San Joaquin Well Logging Society - Bakersfield, CA

Our next meeting is Wednesday, February 15th, 2017, 11:30 AM at CRC 10000 Stockdale Hwy. We hope to see you there!

Next Talk: February 15th, 2017

Practical Geomechanics - A Focus on California
Presented by: Tom Bratton, Geoengineering Manager, Sigma Cubed


The role of geomechanics in the oil industry has been expanding for several years, and today a thorough understanding of reservoir geomechanics is essential to maximizing oil and gas assets. Mechanical earth models play an important role. They not only quantify intrinsic rock properties such as compressive strength, but also quantify the in-situ stresses that act on the formation of interest. This presentation will focus on weaker formations prone to sanding. Two elements are generally required for sand to be produced into the wellbore. First, there must be formation failure and second, the fluid velocity must be high enough to transport the failed material into the wellbore. Different completion options are available (e.g. oriented perforations) but determining the optimal option can be challenging. Other topics of discussion include the impact of changing reservoir pressure on stresses and the data required to improve the geomechanical analysis, while working within the financial constraints imposed by low oil prices.


Tom Bratton is currently the Geoengineering Manager for Sigma Cubed, an oilfield service provider bringing innovative solutions to the industry. Previous experience includes 36 years with Schlumberger where he retired as a Scientific Advisor in petrophysics and geomechanics followed by 2 years as a visiting professor in the Petroleum Engineering Department of Colorado School of Mines. He has a BS degree in Physics from Nebraska Wesleyan University, an MS degree in experimental atomic physics from Kansas State University and is currently completing his PhD in Geophysics from Colorado School of Mines. Tom is a full member of the Society of Petroleum Engineers (SPE), Society of Petrophysicists and Well Log Analysts (SPWLA), Society of Exploration Geophysicists (SEG) and the American Rock Mechanics Association (ARMA).

Meeting Prices:
Lunch (Member): $25.00 - PayPal
Lunch (Non-Member): $30.00 - PayPal
Lunch (Student): $5.00 - 

Attendees may either pay at the door with cash, credit card, or check (checks payable to: San Joaquin Well Logging Society) or pay in advance through PayPal using the appropriate links above.

Please RSVP by Monday, February 13th by paying in advance or emailing the SJWLS Secretary at

Meeting Location:

10000 Stockdale Hwy Room 390
Bakersfield , CA 93309
United States

Meeting Schedule:
11:00AM: Doors open
11:30AM: Lunch
11:50AM: Society announcements and speaker introduction
12:00PM: Talk
1:00PM: Meeting concludes

Thank you to our previous 2015-2016 sponsors!

September 2015
Core Laboratories November 2015
PayZone, Inc. February 2016
SJWLS  April 2016
October 2015
SJWLS January 2016
SJWLS March 2016
SJWLS  May 2016

Previous Talks:
January 2017: Don Nelson, "UIC Project by Project Review"
December 2016: Jon Spencer, "Technical Advances in Tracer Technologies"
November 2016: Mayank Malik, "How Can Microfracturing Improve Reservoir Management?"
October 2016: Robert Lee, "Characterization of Core Using High-Frequency NMR"
June 2016: Tito Perdana, "Formation MicroImager (FMI*): Everything You Wanted to Know but Were Afraid to Ask"
May 2016: Austin Ajufo, "Use of Fuzzy Logic Permeability Models to Facilitate 3-D Geocellular Modeling and Reservoir Simulation: Impact on Business"
April 2016: Deborah Olson, "Water quality Profiles from Well Logs: When They Don't Match Analyses, Consider the Conductive Clays"
March 2016: Terrence O'Sullivan, "In Situ Evaluation of Vapor Properties Using Condensed Vapor Gamma"
February 2016: Janel Chamberlain, "History and Role of the California Department of Oil, Gas, and Geothermal Resources (DOGGR) and Oil and Gas Development in California"

San Joaquin Well Logging Society 2016-2017 Committee Members:

President Co-Vice President Co-Vice President
Robert Gales, CRC Katy Jensen-Doescher, CRC David Barnes, Chevron

Secretary Treasurer Publicity
Sara Maloney, LINN Energy Christopher Lalonde, Core Lab Masood Khan, Schlumberger