Patent ID: 6543540
Filing Date: 2003-04-08
Classification: E21B

Abstract:
A test string for in-situ testing a production zone intersecting a wellbore traversing a formation, comprising:a fluid communication member adapted to allow fluid flow therethrough; at least one first sealing device for isolating at least one production zone intersecting said wellbore to allow a fluid to flow from said at least one production zone into said fluid communication member; at least one sealing device spaced apart from said at least one first sealing device for isolating at least one injection zone intersecting said wellbore; a pump for pumping said fluid from said at least one production zone to said at least one injection zone through said fluid communication member; one or more sensors for measuring one or more reservoir characteristics downhole; a flow control device for controlling flow of said fluid from said at least one production zone; and a control unit for controlling said flow control device, wherein substantially all of said fluid remains in said production zone and said injection zone.