Composite asphaltene precipitation inhibitor

The invention belongs to the technical field of oil field chemicals, and particularly relates to a composite asphaltene precipitation inhibitor which is composed of organic acid, alkylbenzene, phenol, ether and alcohol. The density of the prepared asphaltene precipitation inhibitor is 0.8-1.2 g/cm < 3 >, the closed-cup flash point is greater than 60 DEG C, the condensation point is-5.0 to-35 DEG C, the asphaltene precipitation inhibition rate is greater than 80%, sulfur and chlorine elements are not contained, the asphaltene precipitation inhibition rate is high, environmental protection and low toxicity are realized, and the balance problem of the inhibition rate, environmental protection and safety of an asphaltene precipitation inhibition product is well solved. 本发明属于油田化学品技术领域，具体涉及一种复合型沥青质析出抑制剂，由有机酸、烷基苯、酚、醚、醇组成。制成的沥青质析出抑制剂，其密度为0.8-1.2g/cm3，闭口闪点＞60℃，凝点为-5.0～-35℃，沥青质析出抑制率＞80％，不含硫、氯元素，沥青质析出抑制率高，环保低毒，很好的解决了沥青质析出抑制产品抑制率与环保、安全的平衡问题。