低成本多元复合低密度水泥浆体系的试验研究  

Experimental study on low-cost multi-component composite low density cement slurry system

作　　者：杜静 张洋勇 曾雪玲 魏雪琦 古安林 DU Jing(Special Cement Research Institute of Jiahua Special Cement Co.LTD.,Leshan 614003,Sichuan,China)

机构地区：[1]嘉华特种水泥股份有限公司特种水泥研究院,四川乐山614003

出　　处：《水泥》2025年第3期14-20,共7页Cement

摘　　要：应用颗粒级配理论对提高水泥石的致密性、早期强度发育和长期稳定性具有关键作用,同时开发低成本体系对油气低成本开采具有重要战略意义。基于此,本文以分形级配理论为指导,开发了以五种胶凝材料为基材的1.50 g/cm^(3)复合低密度水泥浆体系,并与常规空心玻璃微珠低密度水泥浆体系进行性能对比。结果表明:多元复合体系水泥石在60℃养护1 d、7 d和28 d的抗压强度比常规体系提高了47.74%、19.18%和9.32%,其渗透率降低了19.44%、23.42%和24.91%;90℃时1 d、7 d和28 d抗压强度提高了0.9%、53.58%和104.23%,渗透率降低了23.23%、20.08%和37.17%。同时,该体系浆体的早期瞬时放热速率较大且明显加快,浆体水化诱导期缩短,加速反应放热峰提前,早期累积水化放热量明显提高。在保证优良工程性能前提下,该体系成本比常规体系显著降低,且浆体造浆率大,可进一步降低固井成本,具有良好的应用前景。The application of particle size distribution theory plays a key role in improving the density,early strength development and long-term stability of cement paste.At the same time,the development of low-cost systems has important strategic significance for low-cost oil and gas extraction.Based on this,this article used fractal grading theory as a guide to develop a 1.50 g/cm^(3) composite low-density cement system based on five types of cementitious materials as substrates,and compared its performance with conventional hollow glass microsphere low-density cement systems.The results showed that the compressive strength of the multicomponent composite system cement stone cured at 60℃for 1 d,7 d,and 28 d increased by 47.74%,19.18%,and 9.32%respectively compared with the conventional system,while its permeability decreased by 19.44%,23.42%,and 24.91%.At 90℃,the 1 d,7 d,and 28 d compressive strength increased by 0.9%,53.58%,and 104.23%respectively,while the permeability decreased by 23.23%,20.08%,and 37.17%.At the same time,the early instantaneous heat release rate of the system slurry was relatively high and significantly accelerated,the hydration induction period of the slurry was shortened,the heat release peak of the accelerated reaction was advanced,and the early accumulated hydration heat release was significantly increased.Under the premise of ensuring excellent engineering performance,the cost of this system is significantly reduced compared with conventional systems,and the slurry production rate is high,which can further reduce cementing costs and has good application prospects.

关 键 词：固井 低密度 低成本 分形级配理论 多元复合 

分 类 号：TQ172.753[化学工程—水泥工业]