US 12,442,296 B2
Intelligent well testing system
Per Erik Berger, Skien (NO)
Assigned to TESTALL AS, Skien (NO)
Appl. No. 18/723,434
Filed by TESTALL AS, Skien (NO)
PCT Filed Dec. 23, 2022, PCT No. PCT/EP2022/087765
§ 371(c)(1), (2) Date Jun. 23, 2024,
PCT Pub. No. WO2023/118580, PCT Pub. Date Jun. 29, 2023.
Claims priority of application No. 20211590 (NO), filed on Dec. 23, 2021.
Prior Publication US 2025/0059888 A1, Feb. 20, 2025
Int. Cl. E21B 49/08 (2006.01); E21B 47/11 (2012.01); E21B 47/12 (2012.01)
CPC E21B 49/088 (2013.01) [E21B 47/11 (2020.05); E21B 47/138 (2020.05)] 26 Claims
OG exemplary drawing
 
1. A method for characterizing reservoir properties when producing formation fluids from a subsurface formation comprising:
establishing a primary wellbore intersecting the subsurface formation,
establishing a secondary wellbore intersecting the same subsurface formation as the primary wellbore, where the secondary wellbore is sidetracked from, or drilled in proximity to, said primary wellbore,
installing one or more well test devices in a selected annular space in either the primary wellbore or the secondary wellbore, and isolating the selected annular space by means of an isolation packer arrangement,
installing a well test system in a selected annular space in the other either primary wellbore or secondary wellbore, and isolating the selected annular space by means of an isolation packer arrangement, the well test system is connected to a well test control system attached to a test string,
establishing a fluid communication path from said subsurface formation to the well test system, and letting formation fluids from the subsurface formation flow into the selected annular space and measuring and monitoring at least flow rate and pressure properties of produced formation fluids by means of the well test system, characterized in
activating the one or more well test devices and measuring and monitoring additional properties of the produced formation fluids of the subsurface formation located between the primary wellbore and the secondary wellbore, by means of the well test system, and collecting, in one or more sample chambers, at least one fluid sample from the subsurface formation fluids-flowing into the well test system and re-injecting fluids not required into the formation by means of a downhole pump.