US 11,814,946 B2
Evaluating annular material in a wellbore using transient thermal response data
Siva Rama Krishna Jandhyala, Katy, TX (US); John Paul Bir Singh, Kingwood, TX (US); and Krishna Babu Yerubandi, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jan. 11, 2022, as Appl. No. 17/573,236.
Prior Publication US 2023/0220763 A1, Jul. 13, 2023
Int. Cl. E21B 47/005 (2012.01); E21B 33/138 (2006.01); E21B 47/07 (2012.01); G01N 25/72 (2006.01); G01N 33/38 (2006.01)
CPC E21B 47/005 (2020.05) [E21B 33/138 (2013.01); E21B 47/07 (2020.05); G01N 25/72 (2013.01); G01N 33/383 (2013.01); E21B 2200/20 (2020.05)] 20 Claims
OG exemplary drawing
 
14. A method comprising:
deploying a fiber optic cable in a downhole portion of a wellbore;
circulating a fluid in the wellbore for creating thermal gradients in a radial direction and an axial direction;
collecting, from the fiber optic cable, temperature data at a first location along the fiber optic cable over a period of time;
collecting, from the fiber optic cable, temperature data at a second location along the fiber optic cable over the period of time in which the fluid is left static in the wellbore and is returning to a thermal equilibrium; and
determining that the temperature data at the first location deviates from the temperature data at the second location over the period of time.