Process for production of oil and gas through horizontal...

Details Process for production of oil and gas through horizontal... Process for production of oil and gas through horizontal...

E - Fixed Constructions

21

B

166/40

E21B 43/14 (2006.01) E21B 43/30 (2006.01)

Patent

CA 1235060

ABSTRACT A method for collecting oil from a plurality of spaced-apart oil-bearing subterranean formations includes the steps of drilling a shaft from the earth's surface to a depth sufficient to intersect a plurality of spaced-apart oil-bearing formations, excavating a working area at selected oil-bearing subterranean for- mations and thereafter drilling a plurality of generally horizontal boreholes from each of the working areas into the selected oil-bearing subterranean formations. Thereafter, oil collection troughs are excavated within each of the working areas to collect oil from the bore- holes and conduct the collected oil into a sump from which the oil is raised to the earth's surface utilizing a single lift. During collection and raising of the oil from each of the spaced-apart oil-bearing sub- terranean formations, the shaft and working areas are sealed

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