METHOD FOR DETERMINING THE INTEGRITY OF AN OIL WELL PLUG

A method for determining the integrity of a plug plugging an oil well includes the following steps: numerically modelling at least one structural characteristic of the plug as the plug solidifies under depth conditions; detection of the formation of a micro-ring fracture and/or of the deterioration...

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Bibliographic Details
Main Author BOIS, Axel-Pierre
Format Patent
LanguageEnglish
French
German
Published 05.06.2019
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A method for determining the integrity of a plug plugging an oil well includes the following steps: numerically modelling at least one structural characteristic of the plug as the plug solidifies under depth conditions; detection of the formation of a micro-ring fracture and/or of the deterioration of the plug as a function of the at least one structural characteristic of the plug with respect to a criterion for the formation of a micro-ring fracture and/or rupture; when the formation of a micro-ring fracture is detected, numerically modelling at least one structural characteristic of the plug as the plug solidifies under depth conditions on the basis of the dimensional evolution of the micro-ring fracture over the course of time; and, if the micro-ring fracture extends between two critical points of the well and/or if the plug is damaged, detecting a fault with the plug.
Bibliography:Application Number: EP20170758229