Sweep Improvement from the Lab to the Field
H. Frampton, P. Denyer, D. H. Ohms, M. Husband and J. L. Mustoni
Event name: IOR 2009 - 15th European Symposium on Improved Oil Recovery
Session: Advanced Waterflooding - Miscellaneous
Publication date: 27 April 2009
Info: Extended abstract, PDF ( 1.22Mb )
Price: € 20
In the early 1990 s BP pioneered the use of reservoir triggers for in-depth placement of chemical
treatments to improve water flood sweep efficiency. It was recognised that the most difficult cases
involved injection water thief zones that were in contact with lower permeability zones of high remaining
oil saturation. In such cases near well-bore treatments were ineffective and an in- depth block appeared to
be required to redistribute the pressures in the reservoir and mobilise the remaining oil. The lessons
learned from this work suggested that the most effective treatments would employ single component
materials placed deep in the formation. A particulate material was envisaged that was likened to popcorn.
It would move freely through the matrix rock until a reservoir trigger caused the particles to increase in
size to block thief zone pore throats.