STUDY OF SESAME OIL AS OIL BASED FLUID IN DRILLING OPERATION

Drilling fluid is a critical component in the drilling process, where it facilitates to efficiently lift cuttings, maintain stable wellbore and produce sufficient hydrostatic pressure that could prevent the influx of formation fluids into the wellbore. . If the mud properties (physical, chemical, rheology properties and elastomeric effect) are incorrect, safety and economics of the drilling operations may be severely compromised. The usage of diesel oil as the continuous phase of drilling fluid is harmful to the environment especially marine environment in offshore drilling operation. Therefore, various bio-diesel oils had been introduced to replace the diesel oil.
Types of drilling fluid used in this project are oil based mud and synthetic based mud. The biodiesel oils (sesame oil) are used as oil phase in oil based mud and mineral oil (saraline) is used as synthetic fluid in synthetic based mud. This project is mainly to identify whether Sesame oil can be used as an alternative for bare oil to replace the diesel oil in oil based mud by examining the rheological properties and elastomeric effect of the muds. Most studies such as yield point measurement, plastic viscosity measurement, electrical stability and filtration loss measurement are conducted in Mud Laboratory in Block 15.