RESEARCH AND APPLICATION OF COMPLEX PLUGGING AND FRACTURING PRODUCTION TECHNIQUE

The complex plugging and fracturing production technique is a new one presented in recent years used for controlling water and increasing oil during high water cut stage. The fundamental principle is as follows:firstly use the high strength and high temperature resistance plugging agent to plug the existed fractures, then create new fractures in other orientations by use of hydraulic fracturing technology. Thus, the effect can be achieved of entirely stimulating the reservoir, reducing the water output and increasing the oil output of the producers, and enhancing the oil recovery. This paper puts forward the principles for selecting wells and layers, discusses the optimizing design of operation and introduces the field application status of the technology.