The 2017-18 Dallas Chapter Officers:

PresidentMriganko Sarkar (Pioneer Natural Resources), Mriganko.Sarkar at pxd.com

VP/TechnologyJohn Byars (NUTECH), JByars at nutechenergy.com

Secretary, Violeta Lujan (Schlumberger), violeta.lujan at gmail.com

TreasurerRay Wydrinski (Pioneer Natural Resources), Ray.Wydrinski at pxd.com

Publicity & Promotion, Jim Lewis (GCC, Great Crew Change), jlewis1 at gmail.com

Next Monthly Chapter Meeting:   14 DECEMBER 2017


 The Dallas chapter will continue to meet in the DeGolyer & MacNaughton sponsored business conference room 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. 


Please RSVP early in order that enough food is ordered and that the chapter does not order too much!!

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

Please contact Violeta Lujan (mailto:dallasspwla@yahoo.com?subject=RSVP) to receive future meeting notifications by email and for making luncheon reservations (RSVP).


presented by

Ali Tinni (Post-Doctoral fellow, Petroleum Engineering, The University of Oklahoma)


The storage and production of natural gas from shale formations are significantly influenced by the presence of an adsorbed phase on the pore walls. The effects of adsorption on storage and production of natural gas are currently quantified trough the establishment of an absolute adsorption isotherm which is fitted to a Langmuir isotherm. However, the establishment of absolute adsorption isotherms requires the assumption of a value for adsorbed phase density.

The assumed adsorbed phase density affects the estimated maximum adsorption capacity and the shape of the isotherm. Therefore it is currently impossible to accurately establish an absolute adsorption isotherm. In order to understand the effects of adsorption on the storage and production of natural gas from shale formations we have measured the total methane storage capacity of core plugs from the Barnett and Eagle Ford shale formations. The methane storage capacity was obtained by measuring the NMR T2 spectra of the shale core plugs at pore pressures between 500-4000 psi while maintaining a constant confining pressure of 5000 psi.

Our measurements show that the effects of adsorption on the storage and production at pore pressures above 2000 psi are negligible. However, at pore pressures below 2000 psi, the increase in total methane storage capacity due adsorption can reach a factor of 2.5. Therefore, below 2000 psi, the production of methane will be negatively impacted by the adsorption of methane molecules, while above 2000 psi the adsorbed and free gas can be produced without distinction.

 Speaker Biography:

Ali Tinni is a Post-Doctoral fellow in the Petroleum Engineering department at the University of Oklahoma. He holds a Master’s and PhD degree in Petroleum Engineering from the University of Oklahoma. His current research interests include fluid flow and storage in unconventional reservoir. He has advanced the application of NMR to defining shale porosity and connectivity.



Dallas , TX, United States

32° 46' 48.504" N, 96° 48' 1.6236" W

See map: Google Maps

Texas US