Real-time monitoring, anomalies detection, and automatic correction of total gas measurements

A method for sending an alert when a drift of a total gas baseline exceeds a threshold, comprising:

• determining an offset between a total gas sensor and one or more gas chromatographs;
• supplying an operating gas containing hydrocarbons to the total gas sensor and the one or more gas chromatographs during a mud-logging operation;
• calculating a theoretical total gas baseline based on the offset and a measured gas chromatograph baseline;
• determining a drift of theoretical total gas baseline;
• and
• sending an alert when the drift exceeds a threshold.

A method for correcting a total gas baseline drift, comprising:

• determining an offset between a total gas sensor and one or more gas chromatographs, determining the offset comprising supplying a carrier gas to the total gas sensor and the one or more gas chromatographs, measuring an initial baseline of the total gas sensor and an initial baseline of the one or more gas chromatographs, and calculating the offset between the initial baseline of the total gas sensor and the initial baseline of the one or more gas chromatographs;
• supplying an operating gas containing hydrocarbons to the total gas sensor and the one or more gas chromatographs;
• supplying a carrier gas from a first carrier gas source to the total gas sensor and the one or more gas chromatographers with the operating gas;
• calculating a drift of a theoretical total gas baseline;
• determining the drift is due to contamination of the carrier gas by supplying the carrier gas to the total gas sensor and the one or more gas chromatographs without the operating gas;
• and
• switching from the first carrier gas source to a second carrier gas source.