Well injection and production methods, apparatus and systems

Abstract

A method and system for enhancing petroleum production are provided, in which a fracturing operation can be conducted in a formation through a string and then petroleum is displaced from the fractured formation by selectively injecting fluid into selected fractures in the formation while other non-selected fractures remain without fluid injection. 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.

1 - 54 . (canceled) 
     
     
         55 . A well completion system for producing reservoir fluids from a reservoir via a wellbore provided in the reservoir, comprising:
 a wellbore string extending along the wellbore and comprising an injection conduit defining an injection fluid passage, and a production conduit defining a production fluid passage; and   a frac valve system coupled to the injection and production conduits, the frac valve system comprising a plurality of frac valves having respective fracturing ports operable to enable staged fracturing of the reservoir, where at least some of the plurality of frac valves comprise measurement instrumentation for measuring downhole parameters.   
     
     
         56 . The well completion system of  claim 55 , wherein the measurement instrumentation comprises at least one of fiber optic distributed temperature sensors (DTS), fiber optic distributed acoustic sensors (DAS), fiber optic distributed pressure sensors (DPS), fiber optic distributed chemical sensors (DCS), and permanent downhole gauges (PDGs). 
     
     
         57 . The well completion system of  claim 55 , wherein the measurement instrumentation comprises at least one of fluid flow meters, electric resistivity devices, oxygen decay monitoring devices, fluid density monitoring devices, pressure gauge devices, and temperature monitoring devices. 
     
     
         58 . The well completion system of  claim 55 , wherein the measurement instrumentation is adapted to obtain measurements at discrete locations along the wellbore and within the reservoir. 
     
     
         59 . The well completion system of  claim 55 , wherein the measurement instrumentation is adapted to measure at least one of distributed temperature, distributed acoustic sound field, chemical composition, and pressure. 
     
     
         60 . The well completion system of  claim 55 , wherein the production conduit, the injection conduit and the measurement instrumentation are housed inside a single encapsulated cable. 
     
     
         61 . The well completion system of  claim 55 , wherein the measurement instrumentation is in communication with a control unit adapted to manage injection and production in response to the measured downhole parameters. 
     
     
         62 . The well completion system of  claim 55 , wherein the measurement instrumentation is configured to monitor proper sealing of packers provided in the well completion system, to monitor isolation or short-circuit of casing cement, to identify a location of a leak in a flow circuit or malfunctioning flow regulator. 
     
     
         63 . The well completion system of  claim 55 , wherein the measurement instrumentation comprises a first instrumentation that is provided in contact with walls of the wellbore and outside of a casing in which the production conduit and the injection conduits are located; a second instrumentation provided on flow regulators provided along the well completion system; and/or a third instrumentation installed on or near an outer surface of the production conduit. 
     
     
         64 . The well completion system of  claim 55 , wherein the frac valve system is part of a flow regulator system comprising injection flow regulators and production flow regulators, wherein each of the injection flow regulators and the production flow regulators comprises at least one of the fracturing ports. 
     
     
         65 . The well completion system of  claim 64 , wherein:
 each injection flow regulator comprises a production tubular forming a production passage and an injection tubular forming an injection passage, the production passage having one or more of the fracturing ports and a slidable sleeve for selectively opening and closing the one or more fracturing ports upon actuation of the slidable sleeve, such that the one or more fracturing ports, when open, allow fluid communication between the production passage and an outer surface of the production tubular which is in fluid communication with the formation; and   each production flow regulator has a production tubular forming a production passage, the production passage having one or more ports configured to allow flow of produced fluids into the production passage during production mode and allowing communicating fracturing fluids to fracture the formation, the production flow regulator further comprising a sleeve for selectively opening and closing the one or more ports.   
     
     
         66 . A frac valve system, comprising:
 injection flow regulators and production flow regulators configured for deployment in spaced apart relation along a wellbore string, wherein the injection flow regulators and the production flow regulators comprise respective frac valves, each frac valve comprising at least one fracturing port in fluid communication with the wellbore string for receiving a hydraulic fracturing fluid therefrom to fracture a portion of the formation proximate to the corresponding frac valve, for performing stage fracturing;   measurement instrumentation coupled to at least some of the frac valves for measuring downhole parameters.   
     
     
         67 . The frac valve system of  claim 56 , wherein the measurement instrumentation comprises at least one of fiber optic distributed temperature sensors (DTS), fiber optic distributed acoustic sensors (DAS), fiber optic distributed pressure sensors (DPS), fiber optic distributed chemical sensors (DCS), and permanent downhole gauges (PDGs). 
     
     
         68 . The frac valve system of  claim 56 , wherein the measurement instrumentation comprises at least one of fluid flow meters, electric resistivity devices, oxygen decay monitoring devices, fluid density monitoring devices, pressure gauge devices, and temperature monitoring devices. 
     
     
         69 . The frac valve system of  claim 56 , wherein the measurement instrumentation is adapted to obtain measurements at discrete locations along the wellbore and within the reservoir. 
     
     
         70 . The frac valve system of  claim 56 , wherein the measurement instrumentation is adapted to measure at least one of distributed temperature, distributed acoustic sound field, chemical composition, and pressure. 
     
     
         71 . The frac valve system of  claim 56 , wherein each injection flow regulator comprises a production tubular forming a production passage and an injection tubular forming an injection passage, the production passage having one or more of the fracturing ports and a slidable sleeve for selectively opening and closing the one or more fracturing ports upon actuation of the slidable sleeve, such that the one or more fracturing ports, when open, allow fluid communication between the production passage and an outer surface of the production tubular which is in fluid communication with the formation. 
     
     
         72 . The frac valve system of  claim 56 , wherein each production flow regulator has a production tubular forming a production passage, the production passage having one or more ports configured to allow flow of produced fluids into the production passage during production mode and allowing communicating fracturing fluids to fracture the formation, the production flow regulator further comprising a sleeve for selectively opening and closing the one or more ports. 
     
     
         73 . The frac valve system of  claim 71 , wherein the one or more fracturing ports comprises a plurality of fracturing ports arranged circumferentially about the production tubular in spaced-apart relation to each other, and wherein each fracturing port comprises a protruding body extending radially from a wall of the production tubular and a bore passing through the protruding body. 
     
     
         74 . The frac valve system of  claim 56 , wherein the frac valves are configured to be actuated by a line-conveyed actuating device deployed while pumping, or wherein the frac valves are configured to be actuated by an untethered ball which actuates a closure for the fracturing port.