Wells – Processes – Placing fluid into the formation
Patent
1993-11-15
1994-06-21
Novosad, Stephen J.
Wells
Processes
Placing fluid into the formation
166308, E21B 4327
Patent
active
053221222
ABSTRACT:
Two spaced apart zones of a carbonate containing formation are simultaneously acid fractured. A lower density fracturing acid is injected into an upper zone of the formation via an annulus of a perforated wellbore communicating with the upper zone thereby causing a fracture to propagate. Simultaneously therewith, a higher density fracturing acid is injected into a lower spaced apart zone via a tube within the wellbore which fluidly communicates with the lower zone thereby causing simultaneously the propagation of a second fracture. Neither fracture contacts the other although complete fracture growth and zonal acidizing is obtained.
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Hager Jr. George W.
Malone Charles A.
McKillop Alexander J.
Mobil Oil Company
Novosad Stephen J.
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