US 12,312,906 B2
Methods, apparatus and systems for creating bismuth alloy plugs for abandoned wells
Terizhandur S. Ramakrishnan, Boxborough, MA (US); Quincy K. Elias, Hyde Park, MA (US); Hua Zhang, Cambridge, MA (US); Youssef Magdy Abdou Mohamed Elkady, Stanford, CA (US); and Yixuan Feng, Duluth, GA (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Aug. 28, 2023, as Appl. No. 18/456,735.
Application 18/456,735 is a continuation of application No. 15/733,723, granted, now 11,739,609, previously published as PCT/US2019/017274, filed on Feb. 8, 2019.
Application 15/733,723 is a continuation in part of application No. PCT/US2018/034422, filed on May 24, 2018.
Application 15/733,723 is a continuation in part of application No. PCT/US2018/034418, filed on May 24, 2018.
Claims priority of provisional application 62/652,015, filed on Apr. 3, 2018.
Prior Publication US 2024/0093571 A1, Mar. 21, 2024
Int. Cl. E21B 33/13 (2006.01); C09K 8/42 (2006.01); C09K 8/46 (2006.01); C22C 12/00 (2006.01); E21B 29/12 (2006.01); E21B 33/12 (2006.01); E21B 33/134 (2006.01); E21B 33/138 (2006.01); E21B 33/14 (2006.01); G01N 33/2028 (2019.01)
CPC E21B 33/13 (2013.01) [C09K 8/426 (2013.01); C09K 8/46 (2013.01); C22C 12/00 (2013.01); E21B 29/12 (2013.01); E21B 33/12 (2013.01); E21B 33/1208 (2013.01); E21B 33/134 (2013.01); E21B 33/138 (2013.01); E21B 33/143 (2013.01); G01N 33/2028 (2019.01)] 9 Claims
OG exemplary drawing
 
1. A method for plugging a wellbore having a casing and cement surrounding the casing and traversing a formation, comprising:
a) determining a measured depth in the wellbore corresponding to a portion of the formation that will interface to a plug when formed in situ;
b) determining at least one property of the wellbore at the measured depth in the wellbore; and
c) using the at least one property of the wellbore as determined in b) to select or rule out an alloy of bismuth and tin or an alloy of bismuth and silver for use in forming a plug in situ at the measured depth; and
d) determining at least one additional parameter based on the at least one property of b), wherein the at least one additional parameter is used in c) to select or rule out the alloy of bismuth and tin or the alloy of bismuth and silver for use in forming the plug in situ at the measured depth, wherein the at least one additional parameter comprises a maximum allowed temperature at the measured depth in the wellbore, where the maximum allowed temperature is based on a boiling point of water at the pressure for the measured depth.