Mud Log Gas (background, drilled, swab, connection, trip)
The gas readings are obtained by the mud loggers from gas analysis equipment and are classified according to the operation that releases the gas into the borehole (background, drilled, connection, trip, etc.)
1. Definitions Drilled gas:
Gas that is produced from the volume of cutting drilled. It is usual to record peak drilled gas level on the mud log.
Back ground gas:
The gas that enters the bore hole during drilling or circulating (correspond to dynamic well bore conditions). It is the average gas level excluding . . .