【摘要】：針對石油鉆探上使用堿礦渣作為主要材料配制固井工作液進行固井,存在固化體脆裂和抗壓強度不夠高的問題,考察了硅藻土對其性能的影響。通過測試未加入硅藻土和加入硅藻土堿礦渣漿體的基本性能,以及不同溫度條件下,不同摻量下固化體的抗壓強度,研究硅藻土對堿礦渣固井工作液性能的影響;利用XRD和EDS,對硅藻土固化體和空白樣進行物性分析,同時通過SEM對固化體微觀形貌對比分析,研究硅藻土的作用機理。實驗結(jié)果表明:適量硅藻土對漿體的基本性能影響甚微,但其對固化體的抗壓強度影響較大。與未加入硅藻土的固化體相比,70℃條件下,硅藻土加量為20%時,固化體1 d抗壓強度提高103%;90℃條件下,硅藻土加量為20%時,固化體1 d抗壓強度提高86%;同時研究表明,硅藻土中含有的非晶SiO_2能在堿溶液中與堿礦渣反應(yīng)生成更多的凝膠物質(zhì),提高了固化體致密程度,有效解決了固化體脆裂問題。
[Abstract]:The effects of diatomite on cementing performance were investigated in view of the problems of solidified body embrittlement and low compressive strength when alkali slag was used as the main material in oil drilling to prepare cementing fluid for well cementing. The influence of diatomite on the cementing fluid of alkali slag was studied by testing the basic properties of the slurry without diatomite and adding diatomite and the compressive strength of the solidified body under different temperature and different dosage. The physical properties of diatomite solidified and blank samples were analyzed by XRD and EDS. The mechanism of diatomite was studied by comparing and analyzing the microstructure of solidified diatomite by SEM. The experimental results show that proper amount of diatomite has little effect on the basic properties of the slurry, but it has a great effect on the compressive strength of the solidified body. Compared with the solidified body without diatomite at 70 鈩，

本文編號：2150162