Wells – Processes – With indicating – testing – measuring or locating
Patent
1986-01-24
1987-01-13
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166308, 73155, E21B 4326, E21B 4706, E21B 4900
Patent
active
046357190
ABSTRACT:
A hydrocarbon-bearing strata in a hydrocarbon producing well is fractured using a fracture pressure which will not propagate the fracture into adjacent overlying and underlying non-producing strata. The least principal compressive stress S.sub.3 of the hydrocarbon bearing strata and the adjacent overlying and underlying strata are determined by the relationship ##EQU1## where S.sub.1 is the maximum principle compressive stress, P.sub.F is the pore fluid pressure, and u is the coefficient of friction. The fracturing pressure is selected to be greater than S.sub.3 for the hydrocarbon bearing strata but less than S.sub.3 for the adjacent overlying and underlying non-producing strata. Hydrocarbon bearing formations suitable for hydraulic fracturing can also be identified.
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Raleigh Cecil B.
Zoback Mark D.
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