Reacted acid and secondary precipitate can not be eliminated on time, affecting the effectiveness of acidizing treatment. Repeated acidizings creat passageway in the formation.
河口低渗透油藏常规酸化后酸液返排困难,致使残酸和二次沉淀不能及时清除,影响了酸化效果;反复酸化形成了大的酸蚀通道,使得酸液沿大通道流走,酸化效果逐渐变差;有的井酸化后含水急剧上升。
参考来源 - 河口低渗油藏泡沫酸分流酸化技术研究与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
现场酸化试验后的返排残酸表面张力可控至对水降低56—67％。
Surface tension of the returned acidizing fluids after field tests can be reduced by 56-67% as compared to that of water.
不动管柱酸化采用平台支撑酸化作业，无需动用钻井船，残酸使用电潜泵返排并直接进入生产流程处理。
The operation can be done on platform without drilling ship, the acid flowback is also be treated by original ESP.
在超选微导管置入后，向撕裂血管的近端或损伤血管的残端轻缓注入N-羟丁基2-氰基丙烯酸酯（NBCA。
N-butyl 2- cyanoacrylate (NBCA) is gently deposited proximally to the arterial tear or at the level of the stump of the traumatized artery after superselective microcatheterization.
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