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热化学复合酸化是在酸化施工中分段注入亚硝酸钠与氯化铵的水溶液,让其在地层中接触并发生热化学反应。利用该反应体系产生N2气体并放出大量的热,从而保持、甚至提高地层温度,降低稠油粘度,防止有机沉淀和酸液冷伤害的产生,有效解除有机物堵塞、沟通裂缝,同时生成的N2也利于残酸的顺利返排。
Thermochemical complex acidification is the acidification of the sub-injection of sodium nitrite and ammonium chloride aqueous solution, let it contact in the formation and thermochemical reactions. N 2 gas is generated by the reaction system and a large amount of heat is released so as to maintain or even increase the temperature of the formation and reduce the viscous viscosity of the heavy oil so as to prevent organic precipitation and cold damage of the acid liquid and effectively eliminate the clogging of the organic matter and the communication of the cracks. Conducive to the smooth return of residual acid.