Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2005-08-16
2005-08-16
Neuder, William P. (Department: 3672)
Wells
Processes
With indicating, testing, measuring or locating
C166S281000, C166S308100
Reexamination Certificate
active
06929066
ABSTRACT:
A method for outward and upward growth of a hydraulic fracture along a well bore sandpacked annulus and over a selected rock formation interval along a length of a well bore. The fracture is created along the interval encompassing a multitude of oil and gas saturated sand formations and intervening silt and shale formations for more efficiently producing oil and/or gas from the formations. The method includes creating a linear sourced, cylindrical, stress field by maneuvering an intersection of a fluid friction controlled first pressure gradient and a second pressure gradient of a frac pad fluid traversing through a well bore sandpacked annulus and a hydraulic frac in the adjacent rock formation interval. The first pressure gradient is created by controlling a fluid flow rate of the frac pad fluid through a portion of the sandpacked annulus located above the top of an upwardly propagating hydraulic fracture. The first pressure gradient is substantially greater than an average gradient of rock formations frac-extension pressure gradient. The second pressure gradient is equal to or less than the average frac-extension pressure gradient and is created by a friction loss of a volume flow rate of the frac pad fluid flowing through combined parallel paths of the sandpacked annulus and the hydraulic fracture propagating outward and upward in the adjacent rock formation.
REFERENCES:
patent: 3138205 (1964-06-01), Graham et al.
patent: 3155159 (1964-11-01), Kieschnick, Jr. et al.
patent: 3167124 (1965-01-01), Graham
patent: 5964289 (1999-10-01), Hill
Crabtree Edwin H.
Margolis Donald W.
Neuder William P.
Pizarro Damon L.
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