Due to the characteristics of thin interbeded layer of the third member of Shahejie formation in Gaoshangpu Oilfield, fracture can easily propagate into water layer. This paper uses multi-factor orthogonal table to conduct a weight analysis about the fracture height impact factor in this area. The results show that the fracture height impact factor in this area follows the pecking order: geostress difference, fluid volume, rate and viscosity. Therefore, to control the fracture height, linear gel and cross-linked gel alternating injection, variable rate and plug sand injection technologies are used to alter the stress between sand and shale layers. Through the net pressure analysis and analysis of fracturing flowback fluid salinity, it is shown that fracture height has been well controlled and the fracture fails to channel the water layer.

interbeded layer  /  fracture  /  fracture height  /  influencing parameter  /  net pressure