Field Pilot of Gel Barriers Placement for In-depth Fluid Diversion in Daqing Oil Field

Abstract

Abstract Due to severe heterogeneity of thick positive rhythm reservoir and the gravity influence, the injected water channels and ineffectively cycles in high-permeability layers at the bottom of thick reservoir. An innovative in-depth fluid diversion technique, gel barrier placement, will be a promising approach to tap the potential of remaining oil in positive rhythm reservoirs in the period of high water-cut, which involves injecting gel into the radial laterals in the vertical wells between the injectors and producers to form ‘gel barriers’, then follow-up injected water will bypass these barriers and be diverted into the upper low permeability zones where the remaining oil is relatively enriched. As a result, the sweep efficiency of the upper low-permeability zones can be increased. A pilot of gel barrier placement was conducted in Daqing oil field. The paper deals with well pattern and chemical agents’ selection, injection scheme design, numerical simulation, and field implementation results.