ABSTRACT
The low permeability reservoir in the BZ27 oilfield needs hydraulic fracturing stimulation. In this paper, the dynamic and static Young's modulus and Poisson's ratio are tested in the laboratory and the corresponding regression relationship is established. The cohesion force and internal friction angles of rock are obtained by empirical relation. Based on the logging information of BZ27 well, the in-situ stress characteristics were interpreted. Furthermore, it is found that hydraulic fractures can easily cross through the rock interface and lead to high fracture growth, which is favourable to stimulation treatment in multi-layers. Lastly, hydraulic fracture widths under different pumping rates are calculated according to the hydraulic fracturing volume (about 400 m3) of adjacent similar oilfields, and the maximum allowable fracture proppant particle size is selected as 20/40 mesh (0.425–0.85 mm) for BZ27 oilfield.
