METHOD FOR SOLVING WATER BLOCK EFFECT

摘要

Disclosed is a method for solving water block effect, the method comprising: adding functional powder to pores producing water block to eliminate the water block, the functional powder being amphiphilic powder, or mixed powder consisting of ultra-hydrophilic powder and hydrophobic powder, the particle density of the functional powder being greater than 1 g/cm3, and the average particle diameter of the functional powder being less than 100 microns. The method of the present invention is simple, easy, of low cost, and has wide sources of raw material. During the use of the method, the functional powder reduces liquid-phase interfacial tension, and has good durability for inhibiting water block damage because the functional powder is small solid particles easily held in tiny holes or cracks on rock surfaces. In addition, compared with an acidifying method, the present invention greatly improves the inverted discharge effect, better solving the water block effect, thus greatly improving the productivity of an oil well.