Application and experimental study on deep water plugging and fracturing technology for high-water well in low-permeability oilfield

In order to improve the production and reduce water content of high-water well,a kind of deep water plugging and fracturing technology was developed for such wells,to meet the high water cut stage stable reservoir and enhancing oil recovery.A highly capable selective plugging was developed by lab experiment,and its water plugging rate is 85%,with rate 4-5 times that of the oil plugging rate.For fracture-breakthrough well,the technology of plugging highwater well was proposed.Oil field test shows that the deep water plugging and fracturing technology increases oil 2.3 t/ d and reduces water 20%,has good effect of increasing oil.