论文部分内容阅读
转向压裂是一项新兴的水力压裂技术,在平面渗透率各向异性储层中转向垂直裂缝具有更好的增产效果.基于渗流力学之汇源叠加理论,建立了平面渗透率各向异性储层中转向垂直裂缝的增产评价解析模型,并给出了计算对比和应用算例.分析结果表明:裂缝与渗透率主轴间的夹角(裂缝斜角)微弱影响均匀各向同性储层中井的产能,但明显影响均匀各向异性储层中井的产能;裂缝斜角变化导致沿优势渗透率方向有效流入面积变化,有效流入面积越大,无量纲生产指数越大,产能亦高.因此建议选择平面方向渗透率差异较大的储层进行转向压裂,以期获得更好的经济效益.
Steering fracturing is a new hydraulic fracturing technology, which has a better stimulation effect on vertical fractures in planar permeability anisotropic reservoirs.Based on the Huiyuan superposition theory of seepage mechanics, a set of permeability permeability anisotropy reservoir The analysis results show that the angle between fractures and the main axis of permeability (crack bevel) weakly affects the well of homogeneous isotropic reservoir Productivity, but obviously affects well productivity in homogeneous anisotropic reservoir. The change of crack bevel angle leads to effective inflow area change along the direction of dominant permeability. The larger the effective inflow area is, the larger the dimensionless production index and the higher productivity are. The reservoirs with large differences in permeability in the plane direction will be diverted to fracturing in order to obtain better economic benefits.