US 11,655,705 B2
Pressure measurement mitigation
Christopher Michael Jones, Katy, TX (US); Anthony Herman Van Zuilekom, Houston, TX (US); and Mehdi Alipour Kallehbasti, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jun. 6, 2022, as Appl. No. 17/833,503.
Application 17/833,503 is a division of application No. 16/428,323, filed on May 31, 2019, granted, now 11,359,480.
Prior Publication US 2022/0298914 A1, Sep. 22, 2022
Int. Cl. E21B 47/06 (2012.01); E21B 49/10 (2006.01); E21B 49/08 (2006.01); E21B 49/00 (2006.01)
CPC E21B 47/06 (2013.01) [E21B 49/008 (2013.01); E21B 49/087 (2013.01); E21B 49/10 (2013.01)] 20 Claims
OG exemplary drawing
 
8. A method comprising:
positioning a formation tester tool into a borehole formed within a formation;
radially expanding a first inner radially extendable packer and a second inner radially extendable packer of the formation tester tool out from the formation tester tool to the formation to form an inner sealed volume between the first inner radially extendable packer and the second inner radially extendable packer;
radially expanding a first outer radially extendable packer and a second outer radially extendable packer of the formation tester tool out from the formation tester tool to the formation to form an outer sealed volume between the first outer radially extendable packer and the second outer radially extendable packer, wherein the first outer radially extendable packer is axially above the first inner radially extendable packer with respect to an axis of the formation tester tool and wherein the second outer radially extendable packer is axially below the second inner radially extendable packer with respect to the axis of the formation tester tool;
radially extending a pad of the formation tester tool that is positioned between the first inner radially extendable packer and the second inner radially extendable packer to form a sealed connection volume between the formation and a pressure sensor within the pad;
controlling iterative drawdown tests on the sealed volume to determine a formation pressure estimate, wherein the iterative drawdown tests include
lowering, in a first iteration, a pressure of the inner sealed volume to be within a first pressure range based on a borehole pressure and an initial pressure measurement of the sealed connection volume, and
lowering, in a one or more later iterations, the pressure of the sealed volume to be within a second pressure range based on the pressure of the sealed connection volume at a preceding iteration; and
in response to a determination that a pressure measurement pattern of the inner sealed volume during the iterative drawdown tests shows a trend in a formation pressure value, generating a formation property prediction based on the trend.