US 11,655,702 B2
Space mapping optimization to characterize multiple concentric pipes
Reza Khalaj Amineh, Houston, TX (US); Burkay Donderici, Pittsford, NY (US); and Luis Emilio San Martin, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Appl. No. 16/66,276
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
PCT Filed Mar. 2, 2016, PCT No. PCT/US2016/020378
§ 371(c)(1), (2) Date Jun. 26, 2018,
PCT Pub. No. WO2017/151123, PCT Pub. Date Sep. 8, 2017.
Prior Publication US 2020/0284137 A1, Sep. 10, 2020
Int. Cl. E21B 47/00 (2012.01); G01B 7/06 (2006.01); G01V 3/38 (2006.01); E21B 47/26 (2012.01); E21B 47/12 (2012.01)
CPC E21B 47/00 (2013.01) [G01B 7/10 (2013.01); G01V 3/38 (2013.01); E21B 47/12 (2013.01); E21B 47/26 (2020.05)] 13 Claims
OG exemplary drawing
 
1. One or more non-transitory machine-readable media comprising program code, the program code to:
receive responses comprising a series of measurements at multiple depths in a plurality of concentric pipes by generating a set of probe signals from a transmitter, the transmitter and at least one receiver disposed in the plurality of concentric pipes;
determine pipe thickness for each of the concentric pipes at the multiple depths based on the series of measurements;
determine defective sections and defect-free sections of each of the concentric pipes based on the series of measurements;
process a space mapping optimization procedure including a fine model and a coarse model to solve magnetic permeability and/or conductivity in the defect-free sections;
compute mapping coefficients in the defect-free sections using the magnetic permeability and/or conductivity;
compute, using the mapping coefficients associated with the defect-free sections, a thickness for each of the defective sections; and
compute simultaneously mapping coefficients and thickness of each defective section using the magnetic permeability and/or conductivity.