Research on improving remaining oil potential by using soluble chemical packer temporary plugging technology

The development of a thin differential reservoir in the XB oilfield has the characteristics of multiple oil layers, thin thickness, large longitudinal distribution span and scattered distribution of remaining oil, etc. The conventional refracturing technology is not targeted, the increase of production is small, and the effective use is difficult. In order to improve the production degree of the thin differential reservoir, the chemical packer is used to temporarily plug fracturing technology, and combined with mechanical packer, to realize the formation of several main fractures in the longitudinal section, and several branch fractures in the plane, to communicate the remaining oil area to the greatest extent. The chemical packer temporarily plugging and re-fracturing technology has been successfully applied in four Wells in XB development zone. Compared with conventional fracturing, this process greatly increases the degree of remaining oil utilization and has a significant production increase effect. It has a wide range of application values.