Abstract
This work investigates the efficacy of a biodegradable natural product, litchi leaves powder (LLP) as a filtration loss control agent in the water-based drilling fluid formulations. In order to evaluate the potential of litchi leaves powder (LLP), a strict protocol of experimentations according to API (American Petroleum Institute) standard has been followed. The experimental outcome showed that before hot rolling and after hot rolling of mud samples at 100 °C it was observed that 3–5% Concentration of LLP significantly increased the rheological parameters such as PV, YP and gelation of drilling fluid as compared to reference mud. Also, LLP reformed the filtration loss control characterization, suggesting a better biodegradable fluid loss reducing agent. After hot rolling at 100 °C for 18 h, the water-based drilling fluid with LLP as an additive showed a marked reduction in filtration control property as compared to reference Mud (RM). Experimental results concluded that 5% concentration of LLP significantly reduced the filtration loss of drilling fluid by 70.6% as compared to reference mud under the influence of 100 psi pressure. However, the conventional fluid loss additive CMC (LVG) reduced the filtration loss by maximum 67.5% as compared to reference mud. Therefore, LLP can be used as an alternative to CMC (LVG) in water-based drilling fluid with a maximum subsurface temperature of 100 °C.
Highlights
A drilling fluid is designed in order to cater various functions during drilling and its high efficiency is rated high, if the various chemical additives and polymers are mixed to the base fluid to fulfil the required parameters of the drilling fluid, such as density, shale stabilization, filtration loss control, alkalinity, lubricity, etc
The results of this study showed that when the concentration of sugarcane and corncob were increased from 6 to 10 parts per billion, there was an advancement in plastic viscosity (PV), but yield point (YP) and gel strength were reduced (Iranwan et al 2009). 20 parts per billion concentrations of rice husks reduced the filtration loss in water-based mud by 65%
These results indicate that 5% litchi leaves powder (LLP) and bentonite particles formed an effective seal as compared to CMC (LVG) during the filtration loss
Summary
A drilling fluid is designed in order to cater various functions during drilling and its high efficiency is rated high, if the various chemical additives and polymers are mixed to the base fluid to fulfil the required parameters of the drilling fluid, such as density, shale stabilization, filtration loss control, alkalinity, lubricity, etc. (Gray et al 1980; Okorie et al.2009). Oil-based drilling fluids are more toxic than water-based drilling fluids. Keeping in view these facts and the environmental compatibility, it has initiated an interest among users to use water-based drilling fluid as compared to the oil-based drilling fluid (Amanullah 2007). The results of this study showed that when the concentration of sugarcane and corncob were increased from 6 to 10 parts per billion (ppb), there was an. 20 parts per billion (ppb) concentrations of rice husks reduced the filtration loss in water-based mud by 65%. The banana peel ash (BPA) was used as a substitute for NaOH in water-based mud. The experimental results showed that banana peels ash (BPA) has a tendency to increase the pH of drilling mud and thereby mitigated the corrosion problem
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