转向压裂增产评价方法

发布时间：2018-05-06 16:22

本文选题：转向垂直裂缝 + 增产评价　；参考：《地球科学》2017年08期

【摘要】：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.
[Abstract]:Steering fracturing is a new hydraulic fracturing technology. Turning to vertical fracture in anisotropic reservoir of plane permeability has better effect of increasing production. Based on the Huiyuan superposition theory of percolation mechanics, an analytical model for evaluating the yield of perpendicular fractures in anisotropic reservoirs with plane permeability is established, and the calculation comparison and application examples are given. The results show that the angle between fracture and permeability spindle (fracture angle) weakly affects the productivity of wells in homogeneous isotropic reservoirs, but obviously affects the productivity of wells in homogeneous anisotropic reservoirs. The change of fracture angle leads to the change of effective inflow area along the direction of dominant permeability. The larger the effective inflow area is, the larger the dimensionless production index is and the higher productivity is. Therefore, it is suggested that the reservoir with different permeability in plane direction should be converted to fracturing in order to obtain better economic benefit.
【作者单位】：中国地质大学能源学院;中国石化海相油气藏开发重点实验室;
【基金】：国家科技重大专项(No.2016ZX05060)
【分类号】：TE357.1

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