Wellbore apparatus and methods for zonal isolations and flow control

摘要

Method for completing a wellbore in a subsurface formation includes providing a sand control device representing one or more joints of sand screens, and a packer assembly along the joints with at least one mechanically-set packer with at least one alternate flow channel therein. Running the packer assembly and connected sand screen into the wellbore, setting a mechanically-set packer into engagement with the surrounding wellbore, injecting gravel slurry into the wellbore to form a gravel pack. An elongated isolation string is run into the sand control device across the packer assembly with valves that serve as an inflow control device. Thereafter, seals are activated around the isolation string and adjacent the packer assembly. A zonal isolation apparatus allows flow control to be provided above and below packer assembly.

主权项

1. A method for completing a wellbore in a subsurface formation, the method comprising:
providing a sand control device comprising:
an elongated base pipe having at least two joints,at least one alternate flow channel extending substantially along the base pipe, anda filter medium radially surrounding the base pipe along a substantial portion of the base pipe so as to form a sand screen; providing a packer assembly comprising at least one mechanically-set packer, each mechanically-set packer comprising:
a sealing element,an inner mandrel, andat least one alternate flow channel; connecting the packer assembly to the sand screen intermediate the at least two joints so that the at least one alternate flow channel in the packer assembly is in fluid communication with the at least one alternate flow channel in the sand control device; running the sand control device and connected packer assembly into the wellbore; setting the at least one mechanically-set packer by actuating the sealing element into engagement with the surrounding wellbore; injecting a gravel slurry into the wellbore in order to form a gravel pack above and below the packer assembly after the at least one mechanically-set packer has been set; running a string of tubing into the wellbore with an elongated isolation string connected at a lower end of the string of tubing, the isolation string comprising:
a tubular body having an inner diameter defining a bore in fluid communication with a bore of the string of tubing, and an outer diameter configured to be received within the base pipe and the inner mandrel,a first valve providing fluid communication between the bore of tubular body and an annular region formed between the outer diameter of the tubular body and the surrounding base pipe, andone or more seals along the outer diameter of the tubular body; placing the elongated isolation string within the base pipe and across the packer assembly such that:
the first valve is above or below the packer assembly, andthe one or more seals is adjacent to the set packer assembly; and activating the one or more seals in order to seal an annular region formed between the outer diameter of the tubular body and the surrounding inner mandrel adjacent to a set packer.