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, March 11th, 2014. 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
Application of Dielectric and Standard Logging Suites to Characterize the Stratigraphic Variations in Archie parameters in Greater Monument Butte Field
Margaret Lessenger, Newfield Exploration Company
Estimation of accurate electrical property parameters, such as the “cementation exponent” m and “saturation exponent” n is critical for characterizing hydrocarbon saturations with resistivity based models for completions decisions and original oil-in-place estimation. These exponents are known to vary with formation brine salinity, clay-content, porosity, grain-size distribution, pore geometry, stress and fluid wettability. Consequently, within large complex reservoirs electrical parameters will vary stratigraphically, lithologically and geographically. Characterizing these variations in a field petrophysical model is critical for successful reservoir characterization and field development.
Traditional methods for estimating m and n are problematic. Core-based measurements of m and n are time-consuming and expensive. It is also difficult to reconstruct in-situ restored state conditions for accurate estimation of m and n with core-based methods. Because of the high paraffin content in our oil, the cleaning processes involved in preparing core samples for electrical property measurements can alter the original clay structure and wettability resulting in inaccurate estimations of m and n. Standard log-based methods for estimating m rely on analysis in a “wet” sand, often not present in unconventional fields and extremely rare at Monument Butte. NMR logging can be used to measure saturations in the flushed zone, but can be prohibitively expensive for routine application in a complex reservoir.
A method for estimating m and n using dielectric data in combination with standard triple combo logs has been developed (Ramakrishna et al, 2012). We expand upon the dielectric model and apply this methodology to over 40 wells within the Green River Formation of the Greater Monument Butte Unit (GMBU) in northeastern Utah, USA. The GMBU covers approximately 100,000 acres with numerous productive stratigraphic units and variable clastic and carbonate depositional facies. This methodology has the distinct advantage of measuring the properties in-situ and allows us to economically extend the analysis to non-cored intervals and additional regions within the field. In this study we illustrate the variations in m and n with variations in rock quality, facies, wettability and stratigraphy within the complex Green River reservoirs.
Margaret Lessenger is a petrophysicist for Newfield Exploration Company in Denver. She has over 30 years of experience as a geophysicist, geologist and petrophysicist working in various basins in the Rockies, North Sea and Gulf of Mexico. She has worked for the Superior Oil Company, ARCO Oil and Gas, Platte River Associates, the Colorado School of Mines Department of Geology, and Williams Exploration prior to joining Newfield. Lessenger holds a BS in Geophysical Engineering, MS in Geophysics, and PhD in Geology from the Colorado School of Mines. She is a member of SPWLA, AAPG, SPE and SEG.
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 email@example.com
Adam HaeckerChesapeake Energy Corporation
6100 N. Western Avenue Oklahoma City, OK firstname.lastname@example.org
|Secretary / Treasurer
RKI Exploration & Production210 Park Ave. # 900Oklahoma City, Oklahoma email@example.com