The Effect of Graphite on the Properties of Class G Oil Well Cement

Muhammad Andiva Pratama, A. Mahmoud, S. Elkatatny
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Abstract

Cementing process is one of the most crucial parts in drilling operation that could determine the durability and stability of the oil or gas well. Many additives had been introduced into the formula of the oil well cement to reach certain qualities to support the well. This study intends to analyze the effect of graphite on the properties of the hardened cement samples as a function of curing time, and compare the change in the properties with that for the samples prepared without graphite. The alteration in properties of the cement compressive strength, Poisson's ratio, Young's modulus, and permeability were studied with curing time. The results showed that the graphite successfully increased the compressive strength, and Poisson's ratio while Young's modulus was reduced which indicates an enhancement in cement strength and elasticity. The cement sheath permeability was also decreased indicating formation of more tight cement sheath with incorporation of graphite into the cement slurry.
石墨对G类油井水泥性能的影响
固井过程是钻井作业中最关键的环节之一,它决定着油气井的耐久性和稳定性。为了达到一定的固井质量,在油井水泥配方中加入了多种添加剂。本研究旨在分析石墨对硬化水泥样品性能的影响,并将其与未加石墨的水泥样品的性能变化进行比较。研究了水泥抗压强度、泊松比、杨氏模量、渗透性等性能随养护时间的变化规律。结果表明,石墨成功地提高了水泥的抗压强度,降低了泊松比,降低了杨氏模量,提高了水泥的强度和弹性。水泥浆中石墨的掺入也降低了水泥浆环的渗透率,表明水泥浆中石墨的掺入使水泥浆环更加致密。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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