| 摘要 |
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 formations 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 boreholes 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 subterranean formations, the shaft and working areas are sealed. |
