US 11,732,569 B2
Well tubing/casing corrosion deposits descaling model
Fuad A. AlSultan, Alahsa (SA); and Abdulrahman T. Mishkhes, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jul. 28, 2021, as Appl. No. 17/386,973.
Prior Publication US 2023/0036144 A1, Feb. 2, 2023
Int. Cl. E21B 37/06 (2006.01); E21B 47/06 (2012.01); E21B 47/00 (2012.01); E21B 41/02 (2006.01)
CPC E21B 47/006 (2020.05) [E21B 37/06 (2013.01); E21B 41/02 (2013.01); E21B 47/06 (2013.01); E21B 2200/20 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method for performing a maintenance operation of a well in an oil/gas field, the method comprising:
identifying, based on a measured sequence of internal diameters of a tubular in the well with respect to longitudinal distances along the well, an extent of corrosion deposit in the tubular;
predicting, using a descaling model of the oil/gas field and based on the extent of corrosion deposit, expected descaling metal loss in the tubular of the well, wherein the descaling model correlates measured descaling metal loss in a reference tubular in a reference well with respect to a difference between a measured sequence of internal diameters of the reference tubular and an original internal diameter of the reference tubular, wherein the reference well is separate from the well;
calculating, based on the expected descaling metal loss, a tubular burst/collapse pressure for a predicted thickness of the tubular;
comparing the tubular burst/collapse pressure against a well operating pressure to generate a comparison result; and
performing the maintenance operation of the well based on the comparison result.