Abstract: The main oil pool of Hailiute Structure possess some characters, such as smaller trap area, bits and pieces fault block, lower formation pressure factor, lower rock mature, stronger water sensitivity. Aim at these, many technologies were adopted for protecting formation in fracturing design, which included being canceled pad fluid, increasing sand fluid ratio, fracturing being closed compel, and expansion control in all fracturing process. There are 42.5 million tons proved reserve in Hailiute structure, which were found after six wells successful fracture. It is a worshipful experience for the resemble area.