Study On Hydraulic Fracturing Technology In Water Sensitive Reservoir Of Bei'er Region In Hailar Basin

With the exploration and development of the Hailar Basin, the exploitation contradictions of Bei'er region was become clear. From the water-sensitive experiment of K₁n₂ core in Bei 301 and 302 exploratory wells, it was indicated that the water sensitive indexes was between 0.96 to 0.99, so it belonged to strong water sensitivity reservoir. For this kind of reservoir, conventional fracturing fluid will destroy the reservoir, not only affect fracturing treatment effect but also impact the evaluation and exploitation to the reservoir. With the exploitation of the oilfield, the cost of fracturing treatment become important index of evaluating the technical feasibility. For the two points above, we studied the low damage complex fracturing fluid for strong water sensitive reservoir, the proppants used in fracturing and the technology of fracturing. Through experiments, HPG and JBX polymer were used as thickening agent, and DLYF-1 and DF919 were used as clay stabilizer and cleanup additive in complex fracturing fluid system. In addition, the technology of superadding quartz sand in the end (ceramisite - quartz sand - ceramisite) was determined, and the effect was very good by field construction.