Predicted bias correction for drilling fluids

A system comprising:

• a gas extraction and sampling system positionable to:
• displace a headspace of a container associated with a drilling fluid sample with a hydrocarbon blend with a first volume of at least one hydrocarbon gas;
• and
• extract the hydrocarbon blend from the headspace associated with the drilling fluid sample;
• a gas chromatograph connectable to the gas extraction and sampling system to determine a concentration over time of at least one hydrocarbon gas of the hydrocarbon blend;
• a processor;
• and
• a memory that includes instructions executable by the processor for causing the processor to:
• generate a gas decay curve of the concentration over time of the at least one hydrocarbon gas of the hydrocarbon blend;
• determine, based on the gas decay curve, a second volume of the at least one hydrocarbon gas;
• determine an extraction efficiency correction factor based on a ratio of the first volume to the second volume;
• and
• correct bias caused by the gas extraction and sampling system during subsequent gas extraction and system operations using the extraction efficiency correction factor.

A non-transitory computer-readable medium comprising instructions that are executable by a processor for causing the processor to perform operations comprising:

• determining a concentration over time of at least one hydrocarbon gas of a hydrocarbon blend with a first volume of the at least one hydrocarbon gas, wherein the hydrocarbon blend displaces a headspace of a container associated with a drilling fluid sample in a gas extraction and sampling system;
• generating a gas decay curve of the concentration over time of the at least one hydrocarbon gas of the hydrocarbon blend;
• determining, based on the gas decay curve, a second volume of the at least one hydrocarbon gas;
• determining an extraction efficiency correction factor based on a ratio of the first volume to the second volume;
• and
• correcting bias caused by the gas extraction and sampling system during subsequent gas extraction and system operations using the extraction efficiency correction factor.