Optimization of refracturing timing for horizontal wells in tight oil reservoirs: A case study of Cretaceous Qingshankou Formation, Songliao Basin, NE China

Jianchun GUO,Liang TAO,Fanhui ZENG

Table 2 Basic parameters of the reservoir model.

Parameter Value Parameter Value Reservoir depth 1 760 m Formation oil volume factor 1.12 Net pay thickness 3.5 m Length of horizontal section 1 480 m Formation pressure 19.5 MPa Number of stages 10 Average Porosity 9.5% Number of clusters 22 Average permeability 1.09× 10-3 μm2 Average cluster spacing 80 m Initial oil saturation 46% Designed fracture half-length 300 m Formation oil viscosity 7.02 mPa?s Designed fracture conductivity 30 μm2?cm