Integrated Modeling and Simulation for CO2 EOR and CO2 Storage in the Zama Pinnacle Reefs of Alberta Basin, Canada
Since December 2006, the Zama oil field in northwestern Alberta, Canada, has been the site of acid gas (approximately 70% carbon dioxide and 30% hydrogen sulfide) injection for the simultaneous purpose of enhanced oil recovery (EOR), acid gas disposal, and carbon dioxide (CO2) storage. The Energy & Environmental Research Center, through the Plains CO2 Reduction Partnership Program, characterized and built integrated reservoir models for several of these Devonian-aged pinnacle reefs. These pinnacle reefs are encountered at an average depth of 1500 m (4900 ft) and are typically 16 hectares (40 acres) at their base and 120 m (400 ft) tall. A large variation in both porosity and permeability is observed for these variably dolomitized carbonate pinnacles. Data were limited for each pinnacle reef; thus the F pool was selected as the pinnacle with the most associated data to be used in an integrated workflow for detailed modeling activities (Figure 1). Three core plugs were made available for analysis from reservoir rock that underwent CT scanning and QEMSCAN analysis to produce a microscale facies model. These results were then upscaled into a multimineral petrophysical analysis to correlate with the formation microimaging and other geophysical well logs to produce a detailed macrofacies interpretation. Rock-fluid inversion was utilized for populating initial water saturation and end-point saturation values for oil, gas, and water phases. These results were then upscaled into a 3-D geocellular framework and distributed using a multiple point statistics workflow, producing the following reservoir properties: facies, porosity, horizontal and vertical permeability, water and oil saturations, pressure, and temperature. The initialView/Download Document
Event/Meeting Information
2014 SEG/SPE/AAPG/SPWLA/EAGE Summer Research Workshop
8/3/2014
San Diego, CA