METHOD FOR CONTROLLING PRODUCTION AND DOWNHOLE PRESSURES OF A WELL WITH MULTIPLE SUBSURFACE ZONES AND/OR BRANCHES

摘要

A method for controlling the influx of crude oil, natural gas and/or other effluents into inflow zones of a multizone well with distinct inflow zones through which crude oil and/or natural gas and/or other effluents are produced, which zones are each provided with an inflow control device (ICD) for controlling the fluid influx through the zone into the well comprises: a) assessing the flux of crude oil, natural gas, water and/or other effluents from the well; b) monitoring production variables, including the position of each ICD and/or the fluid pressure in each inflow zone upstream of each ICD and/or the fluid pressure in a well tubular downstream and in the vicinity of each ICD; c) performing a well test during which production from the well is varied by sequentially adjusting the position of each of the ICD's and the flux of crude oil, natural gas and/or other well effluents is assessed in accordance with step a; d) monitoring during step c production variables in accordance with step b; e) deriving from steps c and d a zonal production estimation model for each inflow zone of the well; and f) adjusting each ICD to control the influx of crude oil, natural gas and/or other effluents into each inflow zone on the basis of data derived from the zonal production estimation model for each inflow zone of the well.