腐殖酸改性技术及其在钻井液中的应用研究

Research on Humic Acid Modification Technology and Its Application in Drilling Fluid

摘要: 腐殖酸作为一种天然有机高分子化合物，在钻井液添加剂领域展现出显著的应用价值。其分子结构中富含羧基、酚羟基等活性官能团，赋予了腐殖酸独特的化学性质，使其在钻井液中具有降粘、降滤失及页岩稳定等多重作用。腐殖酸作为钻井液添加剂，不仅能够有效改善钻井液的流变性、抑制性，还能显著降低滤失量，提高井壁稳定性，减少井下复杂事故的发生。此外，腐殖酸来源广泛、价格低廉，且具有良好的环保性能，符合绿色钻井的发展理念。但是腐殖酸来源不同、煤化程度不同，导致腐殖酸性能变差，通过化学改性、生物技术等手段，可进一步提高腐殖酸的纯度和性能稳定性，拓展其在钻井液添加剂领域的应用范围。未来，腐殖酸作为钻井液添加剂的研究将更加注重技术创新和产业升级，以满足石油与天然气勘探开发领域对高性能、环保型钻井液添加剂的需求。

Abstract: As a natural organic polymer compound, humic acid has shown significant application value in the field of drilling fluid additives. Its molecular structure is rich in active functional groups such as carboxyl and phenolic hydroxyl groups, which endows humic acid with unique chemical properties, so that it has multiple functions such as viscosity reduction, fluid loss reduction and shale stability in drilling fluid. As a drilling fluid additive, humic acid can not only effectively improve the rheology and inhibition of drilling fluid, but also significantly reduce the filtration loss, improve the wellbore stability and reduce the occurrence of complex downhole accidents. In addition, humic acid has a wide range of sources, low prices, and good environmental performance, which is in line with the development concept of green drilling. However, different sources of humic acid and different degrees of coalification lead to poor performance of humic acid. Through chemical modification, biotechnology and other means, the purity and performance stability of humic acid can be further improved, and its application range in the field of drilling fluid additives can be expanded. In the future, the research on humic acid as a drilling fluid additive will pay more attention to technological innovation and industrial upgrading to meet the needs of high-performance and environmentally friendly drilling fluid additives in the field of oil and gas exploration and development.