Wells – Processes – Placing fluid into the formation
Patent
1993-04-19
1994-05-10
Novosad, Stephen J.
Wells
Processes
Placing fluid into the formation
166269, 166308, E21B 4326, E21B 4327
Patent
active
053100034
ABSTRACT:
A hydrocarbon reservoir within a subterranean formation surrounding a wellbore is simultaneously fractured within an upper zone with a lower density acid and within a lower zone with a higher density acid. As the fracturing propagates through the reservoir, the lower portion of the fracture within the upper zone of the reservoir intersects with the upper portion of the fracture within the lower zone of the reservoir. The lower density acid remains within the upper zone of the reservoir propagating the fracture therein while the higher density acid remains within the lower zone of the reservoir propagating the fracture therein.
REFERENCES:
patent: 4787456 (1988-11-01), Jennings, Jr. et al.
patent: 4807703 (1989-02-01), Jennings, Jr.
patent: 4842068 (1989-06-01), Vercaemer et al.
patent: 4917185 (1990-04-01), Jennings, Jr. et al.
patent: 5018578 (1991-05-01), El Raba et al.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Novosad Stephen J.
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