| Hailar Basin is located in Hulunbeier of Inner Mongolia Autonomous Region. The complexity shows not only in special structure, also in the reservoir lithology, physical properties, fluid properties in vertical and horizontal on the big changes. Studies of stress distribution in complex lithology reservoirs which represented by Xing'anling Group tuff optimize the construction scale, determine the method of construction control, improve strength and construction of reservoirs success rate of transformation. Studies were carried out targeted by Xing'anling Group reservoir rocks and tuffaceous containing the characteristics of strong water sensitivity, Strong hydration of rock, Dispersed easily lead to fracturing and early sand plug. As well as Micro-fractures of group reservoir. Fracturing prone to large fracturing fluid filtration, Low-sand ratio sand plug. Transformation of low intensity, Fracturing of low success rate. This paper aims to the basis of study of lithology, physical properties, rock mechanics and stress and other characteristics of complex lithology reservoirs in Hailar Basin. The development of matching technology of fracture stimulation provide technical support for exploration and development of the Hailar Basin. |
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