Fracturing Design and Field Application of Tight Sandstone Reservoir with Ripple Lamination and Natural Fractures

摘要

For the Ahe formation in the DZ area of Tarim Basin, the weak structural plane and natural fractures develop, and the hydraulic fractures are complex. The conventional fracturing model cannot accurately guide the field fracturing design. The guiding idea of this research is the integration of geological engineering. It carried out the core indoor experiment. Based on the imaging logging data, the properties of the weak structural plane were quantitatively characterized. The geomechanical model with the weak structural plane and the spatial distribution model of natural fractures were constructed. The propagation law of hydraulic fracture was studied. The simulation results compared the hydraulic fracture considering the property of weak discontinuity and without considering the property of weak discontinuity. The results showed that the weak structure significantly limited the longitudinal expansion of hydraulic cracks, and the cracks were easier to extend laterally. Based on the geomechanical and natural fracture model considering the property of weak structural plane, the hydraulic fracture morphology of different fracturing parameter combinations was simulated, and the fracturing parameters were optimized. The field application verified the longitudinal restriction of the weak laminar structure on the fracture and the rationality of the fracturing design.