Aerobic degradation of oil-based mud drilling fluid by in situ bacteria in the Hawizeh Marshes

Abstract The increasing global demand for hydrocarbon has brought new challenges in the petroleum reservoir's drilling process. Non-biodegradable chemical additives are used fluid and it leads to endangering environment personnel safety. Thus, there is a great need biodegradable that can protect personal safety while done well. This study with help of microbial analysis investigates effects situ bacteria degenerate gasoline inside oil-based mud, returned lubricant from one oil wells next Hawizeh Marshes. Four types mud were observed. According high growth degradation crude oil, strain was selected. Determination coagulase clumping test shows isolated belongs staphylococcus. We investigate performance staphylococcus bacterium on biological aspects, using gas chromatography technique. It observed exposure small amount against 10 mL indicates considerable degree degeneration, only few days. residual culture medium analyzed by (GC) SARA. results confirmed degrade produce lighter hydrocarbon. saturate fraction increased about 23%, Resin Asphaltene fractions decreased 11% 12%, respectively. research first report characterization oil-degrading at Marsh this field effect pollution be reduced marsh