US 12,454,885 B2
Bore plug analysis system
Terizhandur S. Ramakrishnan, Boxborough, MA (US); and Hua Zhang, Cambridge, MA (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 18/007,087
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Jul. 29, 2021, PCT No. PCT/US2021/043725
§ 371(c)(1), (2) Date Jan. 27, 2023,
PCT Pub. No. WO2022/026727, PCT Pub. Date Feb. 3, 2022.
Claims priority of provisional application 63/059,383, filed on Jul. 31, 2020.
Prior Publication US 2023/0287785 A1, Sep. 14, 2023
Int. Cl. E21B 47/06 (2012.01); E21B 33/12 (2006.01); E21B 47/10 (2012.01)
CPC E21B 47/06 (2013.01) [E21B 33/12 (2013.01); E21B 47/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving pressure data with respect to time acquired via a pressure sensor disposed in an uphole region of a bore of a well, a plug being disposed in the bore to define the uphole region to one side of the plug and a corresponding downhole region to another side of the plug opposite to the one side of the plug;
using at least physical properties of a liquid in the uphole region and thermal information:
computing a temperature induced density variation of the liquid in the uphole region; and
computing a gravitational head induced density variation of the liquid in the uphole region;
based at least in part on at least a portion of the pressure data, the temperature induced density variation of the liquid, and the gravitational head induced density variation of the liquid, determining a state of the plug and the bore from a plurality of states; and
in response to the determined state of the plug indicating that a leak is occurring, performing a plugging operation on the plug to control the leak,
wherein a variation of the gravitational head induced density variation of the liquid in the uphole region due to gravitational head exceeds a variation of the temperature induced density variation of the liquid in the uphole region due to temperature.