The 2019-20 Dallas Chapter Officers:

PresidentSteve Brackeen (Primexx Energy Partners Corp.), Steve.Brackeen@primexx.com

VP/TechnologyMatt Drouillard (Schlumberger), mdrouillard@slb.com

Secretary, Aaron Green (Lonestar Resources), AGreen@LonestarResources.com

TreasurerMike Caputi (Pioneer Natural Resources), Michael.Caputi@PXD

Chapter Publicist, Jim Lewis(GCC, Great Crew Change), jlewis1@gmail.com

Next Monthly Chapter Meeting:
January, 2020 (2rd Thursday)


 The Dallas chapter will continue to meet in the DeGolyer & MacNaughton sponsored Business Conference Room 'A' located in the Providence Towers building at  5001 Spring Valley Road in North Dallas. Located north of LBJ (I-635), south of Belt Line Road, and on the west side of the North Dallas Tollway, this building has the large open archway in its middle and has a red granite facade. The meeting room is located on the 1st floor of the East Tower. Parking is underground ($1) and can be accessed from either Spring Valley Road or from the southbound service road of the tollway. 

Meetings start at 11:30 for a social gathering, followed by a catered buffet at noon (cost $20, students $10). Please RSVP to:


  by Tuesday, January 7th to ensure that sufficient food is ordered.



Post Fracture Pressure Decay:
A novel (and free stage-level assessment method)

presented by 

Michael Sullivan
 Chevron Canada


A method has been developed for the analysis of pressure falloff data following a single-stage treatment in a multi-stage fracture stimulation. The basic premise is that the greater the permeability contacted by the fracture stimulation, the greater the rate of pressure falloff will be. This can be done with as little as 15 minutes of falloff data, but with a “zipper” style completion, the surface pressure falloff of a given fracture stage may be monitored for several hours for no incremental cost while an offset well on the same pad is being stimulated. The initial falloff data is collected well before fracture closure, so proppant is not yet a factor – the pressure decay is influenced by the total fracture system of that stage.

This analysis has been performed on approximately 30 wells, each with about 20 stages, including two wells equipped with fiber optic sensing. The pressure decay follows a straight line on a plot of pressure versus logarithm of time. The slope of that line is the decay exponent, and a large exponent is indicative of greater connected permeability or fracture complexity.

The development of this technique is in its early phases, but thus far a good correlation has been observed between the pressure decay exponent and microseismic activity, as well as between pressure decay and the Young's modulus of the rock being stimulated. In a multi-cluster “plug and perf” completion equipped with fiber optic cable, a positive correlation was observed with the number of clusters being treated. When the same hydraulic fracture stimulation was executed in similar rock types, very consistent results were obtained, suggesting a valid and repeatable relationship. The final validation of this technique will be possible when compared against production logging results.

The prospect of a low cost, or even free, analytical technique in an environment where anything beyond a gamma ray curve is often a luxury, is particularly exciting. This assessment technique could be used for optimization of perforation cluster design and location, landing zone, and fracturing fluid optimization. The authors invite other operators to try this technique and discuss their observations. 


Speaker Biography:

Michael J. Sullivan is a Formation Evaluation Advisor working for Chevron in Calgary.  Mike has had previous assignments as a Cased and Open Hole Petrophysicist in Angola, Calgary, and Houston, as Team leader for Petrophysics R&D with Chevron Energy Technology Company in San Ramon, Ca., and as Reservoir Surveillance Coordinator for the Tengiz field in Kazakhstan.  
He has also held a variety of positions in Petroleum and Production Engineering starting in 1979. Sullivan is a Distinguished Member of SPE, has authored several technical papers, and has been a Distinguished Lecturer with SPE and twice as Distinguished Speaker with the SPWLA.  Email:  Michael.sullivan@chevron.com

He received a BS in Petroleum Engineering from Montana Tech of the University of Montana in 1988. Since then he has had a remarkable industry career that includes the following: Petrophysicist, Mar 2016 to present – Chevron Canada, Calgary; Cased Hole Petrophysicist, 2014 – 2016; Malongo, Angola; Team Leader, Formation Evaluation R&D 2011 – 2014; Reservoir Diagnostics Consultant, 2010 – 2011, Houston; Reservoir Surveillance Coordinator, 2007 – 2010; Sour Gas Production Engineer, 2003 – 2007; Petrophysicist, 2002 – 2003; Open Hole Petrophysicist, 1999 – 2002; Cased Hole Petrophysicist, 1996 – 1999, Malongo, Angola; Cased Hole Formation Evaluation Specialist, 1992 – 1996, Calgary; Production Engineer, 1988 – 1992, Red Deer, Alberta; Production Technologist, PanCanadian Petroleum, 1979 – 1986, Calgary, Canada.

Meeting Location

Dallas , TX, United States

32° 46' 48.504" N, 96° 48' 1.6236" W

See map: Google Maps

Texas US