Wells – Processes – Cyclic injection then production of a single well
Patent
1991-08-29
1993-06-01
Suchfield, George A.
Wells
Processes
Cyclic injection then production of a single well
166272, 166306, 166309, 166 50, E21B 4324
Patent
active
052151468
ABSTRACT:
A method for reducing the time during which steam moves in a lateral direction between two parallel superimposed horizontal wells when utilizing a Steam Assisted Gravity Drainage (SAGD) process. Foam is added while injecting steam into an upper horizontal well once steam breakthrough occurs in an interwell region. Foam enters the interwell region thereby causing an increased pressure gradient. This increased pressure gradient adds to the gravity force thereby providing a greater interstitial oil velocity which increases oil drainage between wells during startup.
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Edmunds et al, CIM Paper No. 91-65, "Effective Steam Assisted Gravity Drainage to Long Horizontal Well Pairs", Presented at the CIM/AOSTRA 1991 Technical Conference in Banff Apr. 21-24, 1991.
Hager G. W.
Malone C. A.
Mobil Oil Corporation
Suchfield George A.
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