METHOD OF DETERMINING THE CONTENT OF AT LEAST ONE COMPOUND CONTAINED IN A DRILLING MUD

Method of determining the content of at least one drilling compound in a drilling mud, comprising: - obtaining a first flow of said drilling mud exiting a wellbore, - performing a first gas extraction by injecting at least a first part of the first flow in a first extraction device (53A) and extracting gas from the first extraction device in order to obtain a first extracted gas and a second flow of drilling mud, and measuring at least a first parameter representative of a gas fraction of said drilling compound in the first extracted gas, and - using at least the first parameter and a correction factor in order to calculate said content; - performing a second gas extraction in a second extraction device (53B) distinct from the first extraction device in order to obtain at least a second extracted gas and a third flow of drilling mud, and measuring at least a second parameter representative of a composition of the second extracted gas, and - using at least the second parameter in order to calculate the correction factor.