Wells – Processes – Placing fluid into the formation
Patent
1994-08-05
1995-07-25
Novosad, Stephen J.
Wells
Processes
Placing fluid into the formation
166280, 166278, E21B 43267, E21B 4304
Patent
active
054353912
ABSTRACT:
A method for fracturing and propping a thick and/or non-homogeneous fracture interval of a subterranean formation which is traversed by a wellbore. A workstring is lowered into the wellbore and a fracturing fluid is flowed into one end of the fracture interval annulus (i.e. that portion of the well annulus which lies adjacent the fracture interval) to initiate a fracture. The flow of fracturing fluid is ceased and a slurry containing proppants is flowed into said one end of the fracture interval annulus. During flow of fracturing fluid and slurry into said one end of the annulus, both are delivered through alternate flowpaths to different levels within said fracture interval. Alternate slugs of fracturing fluid and slurry is continued through the same end of the annulus until all of the levels or zones within the fracture interval have been fractured and propped and in some instances, also gravel-packed.
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Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
Novosad Stephen J.
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