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姬嫄油田是典型的超低渗油田,渗透率主要分布在0.1-1.5mD范围内,目前仅有的普通重复压裂形成单一裂缝的措施改造技术已经不能适应超低渗透油田的改造,因此必须采用有效的增产措施方式有效的改善油层渗透率、扩大渗流面积、增加油流通道来改造油层达到增长的目的。而体积压裂改造技术是在水力压裂过程中,使天然裂缝不断扩张和脆性岩石产生剪切滑移,形成天然裂缝与人工裂缝相互交错的裂缝网络[1],从而增加改造体积,提高初始产量和最终采收率,满足了目前增产措施技术需要并在姬嫄油田实施。
The Jiulong oilfield is a typical ultra-low permeability oilfield with permeability mainly distributed in the range of 0.1-1.5mD. At present, only the technical measures to form a single fracture by ordinary repeated fracturing can not adapt to the transformation of ultra-low permeability oilfields, Effective measures to increase production measures to effectively improve the permeability of the reservoir, expanding the seepage area, increase the oil flow channel to transform the reservoir to achieve the purpose of growth. The volumetric fracturing technology is in the hydraulic fracturing process, so that the natural expansion of fractures and brittle rocks produce shear slip, the formation of natural cracks and artificial cracks staggered cracks network [1], so as to increase the transformation of the volume and improve the initial Yield and ultimate recovery, to meet the technical needs of the current stimulation and implemented in the Ji’e Oilfield.