化学固结堵漏剂的研制与应用

Study and Application of Chemical Cementing Composition for Lost Circulation

摘要: 针对川东北地区恶性漏失堵漏成功率低的难题，研制了广谱型化学固结堵漏剂，由流型调节剂、填充加固剂、密度调节剂和其他辅助组分组成。考察了主要组分用量对堵漏剂性能的影响，优化了堵漏剂配方。封堵实验表明，该堵漏剂封堵岩芯率达97%以上，将其与桥堵材料配伍使用可有效封堵3 mm宽的模拟裂缝，固结后堵漏浆体的承压能力较高。研究表明化学固结堵漏浆的流变模式符合幂律模式。

Abstract: A broad spectrum chemical cementing composition, consisting of rheology control agent, reinforcing filler, density-moderating agent and other constituents, was developed for use in northeast Sichuan area with regard to the problem of low plugging success rate of severe mud losses. The influence of quantity of main constituents on the performance of plugging agent was investigated and thereby the formulation was optimized. Results showed that the core plugging rate reached above 97%. The plugging agent was able to effectively seal the 3 mm simulated fracture when cooperated with bridging materials, and the pressure resistance of slurry was relatively high after cementing. According to the study, the slurry rheology of this chemical cementing composition is in accordance with power law mode.