Wellbore Assembly for Injecting a Fluid into a Subsurface Formation, and Method of Injecting Fluids into a Subsurface Formation

摘要

Wellbore assembly for injecting fluid into a subsurface formation having multiple intervals comprising a plurality of packers having bypass channels at desired locations between the respective intervals. The assembly allows fluid to be injected down a tubing string, back up an annular region, and through the series of packers to impart incremental pressure drops along the intervals. The assembly enhances pressure support by allowing the operator to optimize wellbore injection along intervals having different formation characteristics.

主权项

1. A wellbore assembly for injecting a fluid into a subsurface formation, comprising:
a string of casing traversing at least two subsurface intervals, the casing being perforated along each of the at least two intervals, and the at least two subsurface intervals defining a first interval and a second interval; a string of tubing extending into the string of casing, thereby forming an annulus between the string of tubing and the surrounding string of casing along the at least two subsurface intervals; a bypass packer placed along the string of tubing, the bypass packer having a defined flow-through area that is sized to impart a defined incremental pressure drop so as to optimize fluid injection into the at least two subsurface intervals; and a sealing packer set within the annulus above or proximate a top of an upper-most of the first and second intervals to seal the annulus.