特低渗五点井网长缝压裂渗流规律研究

Experimental Study on the Seepage Law of Ultra-low Permeability Reservoir of the Five-spot Long Fracturing Technique

本文以相似理论为基础,通过水电模拟实验模型模拟了五点井网直井压裂,测定了电压分布和电流密度,研究了裂缝各参数对渗流场的影响。实验结果表明,压力等势线以裂缝为轴呈椭圆分布,随着裂缝旋转而旋转;裂缝穿透比越大,对渗流场的影响范围就越大,压裂井附近渗流由径向流向线性流转变的趋势就越大。

Based on the process-oriented simulation principles of diagenesis,the water-electricity imitation was built to simulate the five-spot vertical hydraulic pattern.The voltage and current intensity were measured to analyze how the infiltrating fluid be affected by different parameters of the exploding fractures.By analyzing and comparing experimental data,the Equipotential Line distributed and rotated taking the fracture as axis.The influencing scope of the infiltrating fluid had a positive correlation with the fracture penetration ratio,as well as the transforming tendency from radial flow to linear flow.