Well injection and production method and system

Abstract

A method and system for enhancing petroleum production are provided, in which petroleum is displaced from a fractured formation by selectively injecting fluid into selected fractures in the formation without injecting into the other non-selected fractures. The injected fluid flows out into the fractured formation and enhances recovery from the non-selected fractures. Petroleum is selectively collected from the non-selected fractures.

Description

PRIORITY APPLICATION[0001]This application claims priority to U.S. provisional application Ser. No. 61 / 763,743, filed Feb. 12, 2013.FIELD[0002]The invention relates to a method and a system for petroleum production, and more specifically to a method and a system for enhancing petroleum production in a well.BACKGROUND[0003]Petroleum recovery from subterranean formations (sometimes also referred to as “reservoirs”) typically commences with primary production (i.e. use of initial reservoir energy to recover petroleum). Since reservoir pressure depletes through primary production, primary production is sometimes followed by the injection of fluids, including for example water, hydrocarbons, chemicals, etc., into a wellbore in communication with the reservoir to maintain the reservoir pressure and to displace (sometimes also referred to as “sweep”) petroleum out of the reservoir. One issue with injecting fluids to enhance petroleum recovery is how to efficiently sweep the reservoir fluid...

AI Technical Summary

Benefits of technology

[0013]According to another broad aspect of the invention, there is provided a method for petroleum production from a well having a well section with a wellbore inner surface in communication with a plurality of fractures in a formation containing reservoir fluid, the method comprising: creating a plurality of zones in the well section, each zone for communicating with at least one of the plurality of fractures and each zone being fluidly sealed from adjacent zones in the well section, and two or more zones

Problems solved by technology

One issue with injecting fluids to enhance petroleum recovery is how to efficiently sweep the reservoir fluids and expedite production.

This reduction in reservoir pressure usually causes a decline in production rates from the well.

Further, the permeability of the desired production fluid (i.e. liquid petroleum) within the reservoir rock reduces in the presence of another p

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