固井水泥石增韧材料的研究进展

固井水泥石这类脆性材料在井下复杂应力环境下易破坏,导致其封固能力下降.增韧材料可增韧降脆水泥石;水泥石完整性评价方法可用于指导增韧材料研发.本文全面介绍了晶须/纤维、纳米材料、胶乳和颗粒等固井水泥石增韧材料及内源增韧的国内外研究成果,分析了各类增韧材料的特点及发展趋势;本文阐述了增韧力学指标存在的问题,并综述了目前固井领域的水泥石完整性评价方法.通过全面总结固井水泥石增韧材料的研究进展,就增韧材料的发展方向提出建议.随着油气勘探向深部、低渗透、海洋和非常规领域的延伸,水泥石韧性要求越来越高,水泥石增韧材料及技术将会有更加广阔的应用前景.

Research Progress of Toughening-Enhancing Materials in Oil Well Cement

The cement-based materials belongs to brittle materials , under the complex downhole stressed easily to be fractured decrease the sealing integrity .Toughening materials can decrease cement sheath its inherent frangibility .The integrity evaluation of the cement can be used to guide the toughening materials research and development .The present paper provides an overview of the current progress of the toughening materials of whisker , fiber, nanomaterials, latex, particle and self-toughening;analysis its characteristic and development trend .This article expounded the problems existing in the toughening mechanics index and reviewed the current integrity evaluation of the cement in the cementing field . Through comprehensive summarized the research progress of the toughening materials , with respect to its development direction are proposed .With the exploitation of oil and gas gradually moving to deep , low permeabilityocean and unconventional , the demand for the properties of cement stone goes higher and higher, which material and technology will be more broad application prospects .