摘要
依据水电相似原理,设计径向井远端压裂电模拟实验模型,研究在裂缝为横向裂缝且径向井筒内摩阻较高的条件下,裂缝条数、裂缝间距、裂缝长度不同时径向井远端压裂的渗流场分布规律。研究结果表明:等压线以裂缝为长轴呈椭圆分布,在径向井筒附近以径向井筒为长轴呈椭圆形状,在远井地带接近圆形;在裂缝端部和径向井筒端部等压线发生明显的弯曲,沿着径向井筒等压线变化平缓;相同电压差的等压线在裂缝附近比较集中,在径向井筒附近及远井地带比较平缓;径向井远端压裂时裂缝数量和裂缝长度存在一最优值,裂缝间距不宜过小,应尽量增加裂缝间的距离。
Based on the hydropower similar principle, the electrical simulation experiment models of distal fracturing for radial well were designed. Under the conditions of vertical fractures and high friction in radial wellbore, the seepage field distribution of different number of fractures, different fracture spacing and different fracture lengths was studied. The experimental resuhs show that the constant pressure line is distributed elliptieally with rotating by taking the fracture as axis, near the wellbore, the constant pressure line is distributed elliptically with rotating by taking the wellbore as axis and in the far wellbore it is close to circle. The constant pressure line produces a clearly bend at the end of fracture and wellbore, and changes smoothly along the wellbore. The constant pressure lines of the same differential voltage are concentrated near the fracture, but fiat near the wellbore. There is an optimal value for the fracture number and fracture length. The fracture spacing should not be too small and should increase the distance between fractures.
出处
《断块油气田》
CAS
2014年第3期386-389,共4页
Fault-Block Oil & Gas Field
基金
国家科技重大专项"大型油气田及煤层气开发"(2011ZX05051)
关键词
径向井
远端压裂
电模拟
裂缝
渗流场
radial well： distal fracturing： electrical simulation： fracture： seepage field
