Study and application of acidification in XSP 1 horizontal well

To be suitable to the reservoir characters and damage causes in XSP 1 well,the technique difficulty of acidification in horizontal well is analyzed.Through the study on the formulations of pickle and viscoelasticity acidifying fluid,the process program of firstly acid wash and then matrix acidification of high displacement is established,matched with thermochemical energization flowing and nitrogen gas lift flowing.The field performance shows that the damage to strata by soak for a long time is relieved,obtaining a field effect of yield increase.