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1. (WO2017178858) METHOD FOR DETERMINING A TIME WINDOW IN WHICH A CASING PRESSURE TEST CAN BE PERFORMED WITHOUT DAMAGING A CEMENT SHEATH

Pub. No.:    WO/2017/178858    International Application No.:    PCT/IB2016/000608
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Apr 16 01:59:59 CEST 2016
IPC: E21B 47/00
E21B 47/10
G01N 33/38
Applicants: TOTAL SA
Inventors: URBANCZYK, Christophe
GARNIER, André
SULEM, Jean
GHABEZLOO, Siavash
AGOFACK, Nicolaine
Title: METHOD FOR DETERMINING A TIME WINDOW IN WHICH A CASING PRESSURE TEST CAN BE PERFORMED WITHOUT DAMAGING A CEMENT SHEATH
Abstract:
The present invention relates to a method for determining a time window in which a casing pressure test can be performed without damaging a cement sheath, the method comprises: - determining the hydration degree of the cement at a given time for a considered pressure and temperature values in the well; - comparing the determined hydration degree and a predetermined value in the interval of [12%;30%]; - if the determined hydration degree is below the predetermined value, determining that the casing pressure test can be done without damaging the cement.