Network Fracturing Techniques Research and its Application in Sandy Conglomerate Reservoir

The permeability of sandy conglomerate reservoir in Erlian Basin is low, and its heterogeneity is very strong, and that its connectivity is bad. The shape of hydraulic fracture in sandy conglomerate reservoir is not regular, and a lot of complicated fracture will be forming in the process of fracturing operation. The effect will not be good when applying common fracturing techniques. Aiming at the pay sand characteristic in BA101x reservoir of Baolige Oilfield, we use some technological means to evaluate brittle index and analyze stress profile; we establish fracture design method which suits sandy conglomerate of research area and develop low damage fracturing fluid which has energy storage function. The research achievement is apllyed in BA77-30x well, using fluid 2201m³ and proppant 112m³. The SRV is about 111×10⁴m3. The well produces 258 day and the cumulative production is about 2393t(4.8 times comparing with common fracturing techniques). It is observed that the effect of network fracturing techniques is better than common techniques. (paper)