2[1]Song Zhenyun.The technique and application of temporary plugging Re-fracturing in changqing low permeable oil field[A].World Petroleum Congress 1st Youth Forum Proceedings[C].see:Published By Petroleum Industry& Beijing Kehai Electronic Press.
3[3]Li Peichao,Wu Zengzhi,Song Zhenyun.The effect of microfractures on hydraulic fracturing treatments in low permeability reservoirs[C]proceedings of the world engineers' convention 2004.Shanghai:china science and technology press,2004:357～360
