System and Method for the Access of Subterranean Deposits

摘要

According to one embodiment, a system for accessing a subterranean zone from the surface includes a well bore extending from the surface to the subterranean zone, and a well bore pattern connected to the junction and operable to drain fluid from a region of the subterranean zone to the junction.

主权项

1. A system for accessing one or more subterranean zones, the system comprising:
a limited surface area, which is land; a first well, located on the limited surface area, comprising a first substantially vertical wellbore extending at least 6,000 feet and proximate to a subterranean zone, which is shale, and a first drainage wellbore with a horizontal portion that extends at least 6,000 feet from the first substantially vertical wellbore; a second well, located on the limited surface area, comprising a second substantially vertical wellbore extending at least 6,000 feet and proximate to the subterranean zone, and a second drainage wellbore with a horizontal portion that extends at least 6,000 feet from the second substantially vertical wellbore. a third well, located on the limited surface area, comprising a third substantially vertical wellbore extending at least 6,000 feet and proximate to the subterranean zone, and third drainage wellbore with a horizontal portion that extends at least 6,000 feet from the third substantially vertical wellbore; a fourth well, located on the limited surface area, comprising a fourth substantially vertical wellbore extending at least 6,000 feet and proximate to the subterranean zone, and a fourth drainage wellbore with a horizontal portion that extends at least 6,000 feet from the fourth vertical wellbore; and wherein each of the four wells is located on the limited surface area and offset from each other 2-250 feet, and each well produces oil to the surface.