Open AccessImproved Miscible Nitrogen Flood Performance Utilizing Advanced Reservoir Characterization and Horizontal Laterals in a Class I Reservoir--East Binger (Marchand) Unit
Author(s) -
Joe Sinner
Publication year - 2005
Language(s) - English
Resource type - Reports
DOI - 10.2172/859100
Subject(s) - nitrogen , petroleum engineering , drilling , injector , directional drilling , injection well , environmental science , completion (oil and gas wells) , pilot test , enhanced oil recovery , engineering , chemistry , mechanical engineering , psychology , organic chemistry , applied psychology
A significant work program was implemented from 2002 to 2004 in the East Binger Unit (''EBU'') miscible nitrogen injection project in an effort to reduce gas cycling and economically increase ultimate oil recovery. This work included the drilling of new wells, both horizontal and vertical, as well as pattern realignment through producer-to-injector conversions. Monitoring of overall performance of the pilot area continues. Response to the various projects continues to be very favorable. Injection into the pilot area, though limited at times by problems in the Air Separation Unit of the Nitrogen Management Facility, and has increased 70% over levels prior to the project. Meanwhile, gas production and nitrogen content of produced gas have both decreased. Nitrogen recycle within the pilot area is now only about 32%, far below the 72% recycle prior to initiation of the project. Poor areal sweep efficiency appears to be the primary cause of nitrogen cycling. Four vertical and three horizontal wells have been drilled in the pilot area throughout the project, and most have had initial produced gas oil ratios and gas nitrogen contents significantly below the field averages. Additional vertical well drilling is planned due to the success of wells drilled to date