Patent ID: 7637316

Claim:
A wellbore system for the production of hydrocarbon fluid from a hydrocarbon fluid reservoir in an earth formation, the wellbore system comprising: a first wellbore drilled from a first surface location at a horizontal distance from the hydrocarbon fluid reservoir, the first wellbore having a lower section extending from a rock formation outside the reservoir, into the reservoir; and a second wellbore drilled from a second surface location horizontally displaced from the first surface location, the second wellbore extending towards the first wellbore and being in fluid communication with the reservoir via said lower section of the first wellbore, wherein the first wellbore is a multilateral wellbore comprising a main borehole and primary and a secondary branch boreholes extending from the main borehole, wherein said lower section of the first wellbore is formed by the primary branch borehole, and wherein said second wellbore is fluidly connected to the secondary branch borehole.