| 摘要 |
A method for sweeping a subterranean petroleum reservoir and recovering hydrocarbons therefrom. Such method utilizes a plurality of spaced hydraulic fractures extending radially outwardly from, and spaced laterally along, a length of a single horizontal wellbore drilled through the reservoir. The hydraulic fractures are each in fluid communication with the drilled wellbore. A multi-channel tubing having a plurality of individual discrete channels therein extending along substantially a length thereof is placed in the horizontal wellbore, and at least one packer element situated along a length of said tubing is employed. The plurality of channels in the multi-channel tubing comprise, at a minimum, a fluid injection channel for transmitting a driving fluid to hydraulic fractures in the reservoir, and a separate hydrocarbon recovery channel for collecting hydrocarbons which drain into the reservoir and producing them to surface. |
| 主权项 |
1. A method for sweeping a subterranean petroleum reservoir and recovering hydrocarbons therefrom, utilizing a plurality of spaced hydraulic fractures extending radially outwardly and spaced laterally along a length of a single horizontal wellbore drilled through the reservoir, said hydraulic fractures being in fluid communication with said wellbore, further utilizing a multi-channel tubing having a plurality of individual discrete channels therein extending along substantially a length thereof and at least one packer element situated along a length of said tubing, said channels comprising a fluid injection channel and a separate hydrocarbon recovery channel, which multi-channel tubing is placed within the wellbore, comprising the steps of:
(i) utilizing said packer on said tubing within said wellbore so as to thereby prevent fluid communication between an adjacent pair of said hydraulic fractures via said wellbore; (ii) injecting a fluid into said reservoir via at least one of said spaced hydraulic fractures and via said fluid injection channel in said multi-channel tubing, said fluid injection channel having an aperture to allow egress of said fluid from said injection channel, and directing said fluid to flow into at least one of said pair of hydraulic fractures; and (iii) recovering hydrocarbons which drain into an other of said pair of hydraulic fractures via said hydrocarbon recovery channel in said multi-channel tubing, a further aperture being located in said hydrocarbon recovery channel to allow ingress of hydrocarbons into said hydrocarbon recovery channel. |
