The Oklahoma City Chapter of the SPWLA has its technical luncheon meetings on the second Tuesday of each month at 11:30 am to 1:00 pm (September through May). The meetings are held at the Petroleum Club of Oklahoma City; 100 North Broadway Oklahoma City, OK 73102 (on the 35th floor of the Chase Building – Downtown OKC).
Annual dues for the OKC SPWLA Chapter are $25. Checks can be made payable to: OKC SPWLA
SPWLA - Oklahoma City Chapter P.O. Box 2741 Oklahoma City, OK 73101
The OKC SPWLA will have its next technical lunch meeting on Tuesday, December 10th, 2013. The meeting will be on the 35th floor of the Chase Building – Petroleum Club – Downtown OKC at 11:30 am. Lunch for OKC-SPWLA Chapter members with reservations $25; non-members will be charged $30.
For reservations call Nora Fitzpatrick (Baker Hughes) 917-6791
Notes on CEC and Bound Water
Andy May, Petrophysicist, Kinder-Morgan CO2
In the Schlumberger and Shell papers on the Waxman-Smits and Dual-Water Equations, the effects on cation exchange capacity (CEC) and its relationship to the amount of bound water in a rock are over-simplified. Most of the work on the CEC of clays and other rocks has been done by soil scientists and scientists that study ceramic and porcelain clays. A wealth of detail on CEC is available from these other groups and it is well summarized in the classic volume “Clay Mineralogy,” edited by Ralph Grim from the International Series in the Earth and Planetary Sciences, published in 1968.
Clay-bound water is not equal to bound water, but is a subset of it. CEC is not a static mineral property, but changes radically depending upon the surrounding water salinity, pH, the type of cations and temperature. CEC is also dependant upon grain size and the surface area of the pore space. Thus, the appropriate standard for the volume of bound water are capillary pressure measurements. If these are not available, then downhole log measurements in a “type shale” should be used to estimate the bound water properties.
Andy May is a petrophysicist for Kinder-Morgan CO2, currently working on CO2 fields in Colorado and Arizona. Previously he was a petrophysicist for Devon Energy and assigned to the Southern Division (East Texas and Louisiana). He has taught shale petrophysics for Nautilus and was an editor for Geobyte magazine. He was also a member of the SPWLA publications committee from 1992 to 2000. He graduated from the University of Kansas with a B.S. in Geology in 1974. Prior to joining Devon Energy, he worked for Fronterra Geoscience, Kerr-McGee, Scientific Software-Intercomp, Exxon and Cities Service. Andy has published or presented over 15 papers on petrophysics, computers and geology.
The Oklahoma City SPWLA Chapter officers are as follows:
333 W. SheridanOklahoma City, Oklahoma 73102
|VP Technology / Education
Chesapeake Energy Corporation
6100 N. Western AvenueOklahoma City, OK firstname.lastname@example.org
R. E. Schneider
300 United Fndrs Blvd. #128
Oklahoma City, Oklahoma 73112
Thmp925 at aol.com
|Secretary / Treasurer
RKI Exploration & Production210 Park Ave. # 900Oklahoma City, Oklahoma email@example.com