Research uncovers surfactants' effects on drilling fluid performance in oil and gas, suggesting enhancements for low-pressure wells.
Drilling fluid design is becoming one of the primary focal topics and is a crucial part of the drilling operation. Drilling fluids serve many primary purposes, including as moving cuttings from the wellbore to the surface, supplying the weight required to regulate the formation pressure, cooling and lubricating drill bits and casings, and bearing the weight of the drill bit and drill pipe. Optimizing the physical characteristics of the drilling fluid to fit the various locations needed is crucial for achieving the greatest performance. Drilling fluids are separated into two categories based on the primary substance: water-based mud and oil-based mud. Since water-based drilling fluid is less expensive and generally more ecologically benign than oil-based drilling fluid, it is without a doubt the most widely used drilling fluid in oil and gas exploration. But in high temperatures and other extreme situations, water-based mud is also infamous for having poor rheological and filtration qualities. Because it effectively lowers rheology, the chance of water clogging, and the amount of filtrate lost to the formations, surfactant has been utilized as an addition. Certain surfactants can also be employed as lubricants and stop an in situ oil/water emulsion from forming. The necessity to lessen the impact on abnormally low-pressure gas deposits through the use of hydrocarbon-based foam solutions and enhanced balanced pressure drilling technologies makes the study relevant. In order to optimize the technology used in the construction of wells in gas fields with anomalously low formation pressure, the article will examine local and international experience in the application of balanced pressure drilling technology, analyze research methods, and create foams for well construction. It will also examine the possibility of creating stable gaseous hydrocarbon-based solutions, analyze the impact of different surfactants on the process of creating anhydrous foams on different bases, and identify the most effective combinations of amphiphilic chemical reagents and bases for the preparation of gaseous hydrocarbon-based solutions. The paper employs techniques for evaluating the experience of balanced pressure drilling technology, refining the technology by substituting foamed drilling fluids for liquid solutions, and examining industrial and scientific literature on the production of gaseous solutions on an anhydrous foundation. It was discovered that there are instances of balanced pressure drilling technique being successfully used in well building under very low reservoir pressures in the real world. The best laboratory tests for producing foam were determined. It is suggested that balanced pressure drilling technique be improved for low-pressure gas field well building. To reduce the effect on the filtering capabilities of gas reservoirs, anhydrous foams must be prepared and used. The capacity of several surfactants to stabilize the formation of aeration solutions based on hydrocarbons was examined.
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Talib et al. (2025) studied this question.
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