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The conventional method for achieving selective zonal production in horizontal wells is to case, cement, and perforate multiple zones to control flow and increase reservoir drainage.  This process is complicated, time-consuming and costly.  Cement also has the potential to damage wellbore permeability. 

 

Substantial process improvements can often be made by utilizing wellbore isolation packers.  Cement-inflatable packers were first utilized for zonal isolation in horizontal wells in the early ‘80’s.  That technique was used successfully for two decades.  For today’s wells with stricter environmental concerns, new generations of less complex non-inflatable hydraulic, hydrostatic and reactive-element swellable packers have joined the ranks of wellbore isolation options.  These new generation packers are significantly more efficient, particularly in harsh and remote environments as they do not require cementing or complicated running tools. 

 

This presentation will examine wellbore isolation packer completion systems involving inflow control devices which provide uniform flow across the entire length of the horizontal section, thus improving productivity, drainage and ultimate recovery.  Intelligent well designs that are run as an integral part of the liner will also be examined.  It will be demonstrated how the use of wellbore isolation packers and sleeves allows multiple zones to be fraced selectively in a continuous operation.

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