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Residual Hydrocarbons – An E & P Impact Overview, by Paul A. Connolly
Date - March 30 2016, Time 11:30 am-12:30 pm. Lunch Servered at 11:00 am. Location Repsol 2455, Technology Forest Blvd, The Woodlands Tx 77381. Cost Regular $25 and Students $10 (Lunch Included).

Residual hydrocarbons are those left in a reservoir in the aftermath of a natural or production-induced imbibition process which has reduced the hydrocarbon saturation to levels well below those initially present in the original accumulation.  For dominantly water-wet systems, they are generally immobile under primary production, but have often been the targets for tertiary EOR projects, having been left behind in the swept portions of waterflood projects.  Identification of hydrocarbons as residuals in exploratory ventures can be key to avoiding costly mistakes – running pipe on dry holes, conducting production tests of non-producible zones, and drilling seismic “bright spots” caused by residual gas saturation (“fizz gas”) in breached traps, etc.  Rudimentary evaluation techniques for identifying residuals will be shown, and laboratory rock property measurements useful in understanding the expected saturation level of residual hydrocarbons in a given rock will be discussed.  Finally, examples illustrating the exploration and production impact of proper identification and characterization of residual hydrocarbons will be shown.
Paul Connolly is the Chief Petrophysicist for EOG Resources, Inc., In Houston, Texas.  He graduated from Michigan Technological University in 1976 with a BS degree in Applied Physics, and joined Shell Oil Company as a Petrophysical Engineer. From 1976-1983, Paul held various Petrophysical Engineering assignments in the Michigan, Permian, Delaware, Anadarko, Ardmore, and Arkoma basins.  From 1983-1994, Paul held Petrophysical Engineering supervisory positions in the Shell Companies, including Division Petrophysical Engineer for areas of California and the Gulf of Mexico, Research Manager, and Technical Manager in Pecten International Company.   Paul joined EOG Resources as a Petrophysical Specialist in 1994, working international projects and new venture evaluation.  He was assigned to his current position in 1995, and has been responsible for growth and development of the Petrophysical specialty contributions within EOG Resources, play development support, and advising senior management.  Paul has previously served the Houston Chapter of SPWLA for ten years, with two terms as VP for the Downtown Section, seven years as Treasurer, and one term as Chapter President.  He has also served a two-year term on the SPWLA International Board of Directors as Director of North America Region I.