耐高温树脂粉对热采井水泥浆性能的影响

Effects of High-temperature Resistant Resin Powder on the Performance of Cement Slurry in Thermal Recovery Wells

刘卫红 王晓亮 胡千红 许明标

LIU Weihong WANG Xiaoliang HU Qianhong XU Mingbiao

稠油油藏在开采过程中由于高温蒸汽的注入，产生的热应力往往会导致固井水泥石的破坏。针对这一问题，优选了一种聚芳醚酮类耐高温树脂粉作为弹性材料加入水泥浆体系中，研究了树脂粉对水泥浆常规性能、力学性能及耐高温性能的影响。研究结果表明，在水泥浆中加入4%的树脂粉时，水泥浆的稠度系数为0.71 Pa·sn、滤失量为34 mL、稠化时间为225 min、抗压强度为17.69 MPa，水泥浆的常规性能均满足现场作业要求；而水泥石的弹性模量则可以降低至 4 GPa 以下，树脂粉的加入可以明显提高水泥石的弹性。加有树脂粉的水泥石在320 ℃高温养护28 d后，抗压强度为18.68 MPa，抗冲击强度为1.97 kJ/m2，弹性模量为3.67 GPa，显示了较好的抗高温强度和弹性。与未加树脂粉的水泥石相比，水泥石的渗透率降低了 61.3%，弹性模量下降了 39.1%，峰值应变增加了119.0%。树脂粉的加入改善了水泥石的脆性，增加了水泥石的弹性以及抗形变的能力，能够有效地提高热采井水泥石在注蒸汽作业过程中抵抗热应力破坏的能力。

During the exploitation process of heavy oil reservoirs，the thermal stress generated by the injection of high-temperature steam often leads to the failure of cement. Aiming at this problem，a type of polyaryl ether ketone high-temperature resistant resin powder was selected as elastic material and added to the cement slurry，and the influence of resin powder on the conventional properties，mechanical properties，and high-temperature resistance of the cement was studied. The results showed that when 4%resin powder was added to the cement slurry，the consistency coefficient of the cement slurry was 0.80 Pa · sn，the filtration loss was 34 mL，the thickening time was 225 minutes，and the compressive strength was 17.69 MPa. The conventional performance of the cement slurry met the requirements of in-site operations. The elastic modulus of cement stone could be reduced to below 4 GPa， indicating that the addition of resin powder could improve the elasticity of cement stone. After curing for 28 days at the high-temperature of 320 ℃，the compressive strength of cement stone was 18.68 MPa，the impact strength was 1.97 kJ/m2，and the elastic modulus was 3.67 GPa，which exhibited good high-temperature resistant strength and elasticity. Compared with the cement stone without resin powder，the permeability of the cement stone decreased by 61.3%，the elastic modulus decreased by 39.1%， and the peak strain increased by 119.0% . The addition of resin powder reduced the brittleness of cement stone，increased its elasticity and capability of anti-deformation，and could effectively enhance the ability of cement stone to resist thermal stress damage during steam injection operations in thermal recovery wells.

10.19346/j.cnki.1000-4092.2024.04.004