Mahmoud Ahmed Abdulhamid, Elkatatny Salaheldin
College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum & Minerals, 31261 Dhahran, Saudi Arabia.
ACS Omega. 2024 Feb 15;9(8):8654-8665. doi: 10.1021/acsomega.3c07365. eCollection 2024 Feb 27.
The oil well cementing job is the operation in which a cement paste is pumped to fill the annulus behind the casing. Inclusion of nanomaterials in oil well cement results in improving the cement properties. This paper provides a comprehensive overview of incorporating nanosilica into oil well cement, addressing various aspects of the nanosilica manufacturing process, dispersion challenges, the impact on cement hydration and properties, as well as the operational challenges. The addition of nanosilica is found to enhance cement properties such as hydration rate, compressive strength at low temperatures, and resistance to deterioration at high temperatures. However, challenges arise, including increased viscosity and the need for higher water content. Dispersion of nanosilica into cement slurry remains a difficulty, compounded by the high manufacturing cost, limiting its practical application. The paper recommends further research to improve nanosilica dispersion, explore cost-effective raw materials, and overcome operational challenges for broader utilization in oil well cementing.
油井固井作业是将水泥浆泵入套管后环形空间进行填充的作业。在油井水泥中加入纳米材料可改善水泥性能。本文全面概述了将纳米二氧化硅掺入油井水泥的情况，涉及纳米二氧化硅制造工艺的各个方面、分散挑战、对水泥水化和性能的影响以及操作挑战。发现添加纳米二氧化硅可提高水泥性能，如水化速率、低温抗压强度和高温抗劣化性。然而，也出现了一些挑战，包括粘度增加和需要更高的含水量。将纳米二氧化硅分散到水泥浆中仍然是一个难题，再加上制造成本高，限制了其实际应用。本文建议进一步开展研究，以改善纳米二氧化硅的分散性，探索具有成本效益的原材料，并克服操作挑战，以便在油井固井中更广泛地应用。
