Technical research of fracturing tapping potential in old light oil reservoirs of Henan oilfield

With the enhanced degree of oil recovery, the fracturing objective transformed from thick layers to thin interbedded layers with middle-low permeability, which are mainly distributed in VI-IX of Shuanghe oilfield, lower series of Xia'ermen, part of layers in B304 well, Wangji oilfield, Jinglou 8 area, etc. the remaining reserves of which is high up to 1 000×104t, with a good tapping potential of fracturing. However, the fracturing of interbedded layers at present have the problems of big fracturing height, near to water layers, limited oil supply capacity and low degree of transformed effect. In accordance with different characteristics of interbedded layers, the technical research of fracturing tapping potential in old light oil reservoirs has been studied and the special technology that suitable for it has been formed, which ensures the fracturing effect and therefore provides technical support for stable production of interbedded layers of Henan oilfield.