酸化预处理有效降低破裂压力机理分析

MECHANISM ANALYSIS OF ACIDIZING PRETREATMENT TO REDUCE EFFECTIVELY BREAKDOWN PRESSURE

破裂压力是水力压裂设计的关键参数,破裂压力参数的正确与否直接影响着水力压裂施工的成败。随着石油工业的发展,高温深井也是越来越多的投入生产,它一般具有异常地层破裂压力,这给水力压裂提出了更高的要求,如何降低破裂压力成为人们关注的焦点。文中通过分析酸化过程中的酸和矿物反应,从微观上说明了酸化预处理降低破裂压力的机理。

In hydraulic fracturing design,whether the breakdown pressure is accurate or not will influence directly on the success of hydraulic fracturing since this pressure is the key parameter.As the development of oil industry,more and more high-temperature and deep wells with abnormal formation breakdown pressure,are put onto operation.So,how to reduce this pressure in hydraulic fracturing becomes a big concern.This paper illustrates the mechanism of acidzing pretreatment to reduce breakdown pressure by analyzing the reaction of both acid and mineral during acidizing treatment.