Well Monitoring System Flashcards
the main instruments for monitoring the liquid level
float-level gauges and ultrasonic-level sensors
After invasion of formation fluids into the wellbore, the total volume of drilling fluid increases, and the level of the drilling fluid tank rises
Volume Detection Method for the Drilling Fluid
the main instruments for monitoring the liquid level are float-level gauges and ultrasonic-level sensors
Volume Detection Method for the Drilling Fluid
These sensors are installed in each drilling fluid tank to monitor its level, thus the cumulative volume changes of the drilling fluid can be obtained
Volume Detection Method for the Drilling Fluid
By measuring the time difference between the transmitting time of the acoustic wave and the receiving time, the drilling fluid in the wellbore (from surface/wellhead) can be calculated. This principle can be used to detect top level of mud if there is a total loss.
Acoustic Wave Method of Total Loss Detection
If there is a total loss and the mud level cannot be seen at wellhead
Acoustic Wave Method of Total Loss Detection
Acoustic wave signals can be sent downwards along the wellbore, this signal will be reflected on the gas-liquid interface in the wellbore, and the reflected wave will reach the receiving equipment upwards along the wellbore;
Acoustic Wave Method of Total Loss Detection
inspect rock cuttings from the shale shaker at regular intervals;
Mudlogging
This log is useful to the geologist in correlating this well with others in the vicinity. Mudloggers also monitor the gas present in the mud by using gas chromatography
Mudlogging
Calculations and cuttings descriptions can be matched with the depth, hence, a log of the formations being drilled can be drawn up;
Mudlogging
The commonly used means of detection is the
target-type flowmeter, but also electromagnetic flowmeter and mass flowmeter detection are used
