Optimization of process parameters for acid fracturing assisted herringbone well SAGD

Zhong18 wellblock of Fengcheng oilfield developed with low permeability interlayer and had strong heterogeneity, which caused steam chamber conventional assisted gravity drainage (SAGD) process cannot extend lengthwise continuously serious heat loss. To address this problem, a method acid fracturing SAGD is proposed to enhance the oil improve recovery. Based on herringbone well being used in wellblock, orthogonal experimental design reservoir numerical simulation are determine significance level fracture parameter optimization process. The priority sequence is: permeability, width, half-length, spacing. optimal parameters as: 3D 2.8 mm 80 m half-length A 10-year using optimized can recovery by 9.2 % compared result proved that effectively penetrate interlayer, expand sweep range chamber, degree reservoir.