Part of #Water-based glycol drilling fluid as an environmentally friendly alternative to oil-based muds# :
Publishing year : 2011
Conference : Second National Conference on Waste and Waste Management in Oil and Energy Industries
Number of pages : 9
Abstract: Awareness of the importance of environmental issues has become more and more central to the thinking of the oil industry and regulators over the past decades. The oil and gas industry is focusing more and more on selecting alternatives to safe water based glycol drilling fluids as substitutes for environmentally hazardous oil-based mud, as regulations become more restrictive for offshore and land operations, especially in Iran's oil fields. The results obtained from the laboratory and field use indicate that the glycol type and concentration can be modified to suit a particular drilling application to effectively reduce HTHP fluid loss values, improve the slalom inhibition, increase the lubricity and reduce differential sticking potential. This paper completely compares water-based glycol muds properties, i.e., rheological, shale inhibition, and fluid loss properties along with environmental acceptance, biodegradability, and economic survey with OBMs. According to the composition of glycol mud and the percentage of glycol, the water-based glycol mud system is environmentally friendly and totally non toxic. In addition, glycol and its copolymers provide improved shale stabilization by minimizing dispersion of water-sensitive shale, improving HPHT and API fluid loss control, and improving filter-cake quality and lubricity. Base on studies done on water-based glycol muds are very economical options in comparison with oil-based mud.