Effect of sugarcane leaf ash on the compressive strength and shear bond strength of API class G well cement
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Abstract
Well cementing is an important stage in oil and gas drilling operations that aims to maintain well integrity by forming a strong bond between the casing and formation. One effort to improve the quality of well cement is to utilize pozzolanic materials from agricultural waste, such as sugarcane leaf ash. This study aims to analyze the effect of adding sugarcane leaf ash on the compressive strength and shear bond strength of API Class G well cement. The study used a laboratory experimental method with sugarcane leaf ash concentration variations of 0%, 1%, 2%, 3%, and 4% by weight of cement (BWOC). Specimens were prepared through mixing, molding, and curing processes, followed by testing using a hydraulic press. The test data were analyzed descriptively to evaluate changes in mechanical properties at each additive concentration. The results showed that adding sugarcane leaf ash affected the compressive strength and shear bond strength of API Class G well cement. The highest compressive strength of 629.86 psi was obtained at a concentration of 2% BWOC, while the highest shear bond strength of 1,102.13 psi was obtained at concentrations of 1% BWOC and 2% BWOC. Adding sugarcane leaf ash above the optimum concentration caused a decrease in the mechanical properties of the cement, indicating that increasing the additive concentration does not always result in increased strength. The results indicate that sugarcane leaf ash has potential as an alternative additive for API Class G well cement, with an optimum concentration of 2% BWOC based on the compressive strength and shear bond strength parameters.
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References
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