Application of SAGD in the Grand Rapids Formation with a thin Basal Water Leg and Upper Transition Zone
Authors: Sandeep Solanki, Marnie Connelly, An Mai, Muhammad Atif, Kevin Treptau, David Stachniak and Jason Nycz, Laricina Energy Ltd.
Source: This paper was prepared for presentation at the World Heavy Oil Congress held in Edmonton, Alberta, Canada, March 23 – 27, 2015
Management of steam chamber pressure with respect to a thin basal water leg and an upper transition zone is key to the successful SAGD operation in the Upper Grand Rapids at Laricina Energy Ltd.’s Commercial Demonstration Project at Germain.
The Grand Rapids Formation comprises the upper part of the regressive Upper Mannville Group (Lower Cretaceous). Regionally, the Grand Rapids Formation is a marine deposit occurring at an average depth of 200 m. At Germain, the shoreface depositional environment results in a reservoir with a homogenous and predictable net sand interval. Within the development area, the reservoir has a thin basal water zone and an upper transition zone sandwiching the highly bitumen saturated sand.
Early results from the Commercial Demonstration Project include performance data on well place, learnings on operating pressure behavior with respect to lean zones, use of gas co-injection to manage lean zones and early positive performance data from the Solvent-Cyclic SAGD process.