Abstract: A method for controlling the influx of fluids into a multizone well in which each inflow zone is provided with an inflow control device, comprises: assessing the flux of oil, gas, water and other effluents from the well; monitoring production variables, including ICD position and/or fluid pressure in each inflow zone upstream of each ICD and/or downstream of each ICD; sequentially adjusting the position of each of the ICDs and assessing the flux of crude oil, natural gas and/or other well effluents; monitoring production variables; deriving a zonal production estimation model for each inflow zone of the well; and 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.

Abstract: A method for virtually metering flow rates in a cluster of injection wells comprises: closing each well in and performing a dynamically disturbed injection test (DDIT) on it, during which the injection rate to the well is varied while the flow rate in the header conduit assembly (HCA) and one or more injection well variables of the test well and the other wells are monitored, and the other wells are controlled so that their tubing head pressures or flow meter readings remain constant; for each tested well deriving a model providing a correlation between variations of the fluid flowrate attributable to the test well and variations of the well variables monitored during each DDIT; injecting fluid into each well while monitoring a flow pattern in the HCA and one or more well variables; calculating an estimated injection rate at each well basis on flow pattern, well variables and the model.

Abstract: A method for virtual metering of fluid flow rates in a cluster of fluid injection wells which are connected to a collective fluid supply header conduit assembly comprises: a) sequentially testing each of the injection wells of the cluster by closing in that well and then performing a dynamically disturbed injection well test (DDIT) on the tested well, during which test the injection rate to the tested well is varied over a range of flows whilst the fluid flowrate in the header conduit assembly and one or more injection well variables, including tubing head pressure, of the well under test and of the other wells in the cluster are monitored, and the other wells in the cluster are controlled such as to cause their tubing head pressures or flow meter readings to be approximately constant for the duration of the test; b) deriving from step a a well injection estimation model for each tested well, which model provides a correlation between variations of the fluid flowrate attributable to the well under considerati

Abstract: A method for controlling the influx of fluids into a multizone well in which each inflow zone is provided with an inflow control device, comprises: assessing the flux of oil, gas, water and other effluents from the well; monitoring production variables, including ICD position and/or fluid pressure in each inflow zone upstream of each ICD and/or downstream of each ICD; sequentially adjusting the position of each of the ICDs and assessing the flux of crude oil, natural gas and/or other well effluents; monitoring production variables; deriving a zonal production estimation model for each inflow zone of the well; and 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.