径向井压裂产能水电模拟实验研究

Experimental Research on Hydraulic Simulation of Radial Well Fracturing Productivity

径向井压裂拥有成本低,增产效果好的优势,在小规模油藏的运用越来越多。基于水电相似原理,利用水电模拟实验,研究了径向井压裂产能,分析了不同裂缝间距和不同裂缝长度对于径向井压裂产能的影响和不同裂缝间距下的等势线。通过对实验内容分析得出:裂缝间距越大,径向井的压裂效果越好,其控制的泄油面积也越大,有利于提高油藏采收率;随着裂缝间距的增加,产能的增加幅度逐渐变小;裂缝的长度越大,径向井压裂后的产能越大;对比裂缝长度和裂缝间距对于径向井压裂产能的影响,发现裂缝长度的增加更能提高压后产能。基于上述研究,可以为现场的径向井压裂产能研究提供一定的理论支撑。

The radial well fracturing has advantages of low cost and good stimulation effect, so it is widely used in small scale reservoirs. Based on the water-electricity similarity principle, radial well fracturing productivity was studied by simulation experiments, effect of different crack spacing and different crack length on radial well fracturing productivity was analyzed as well as the equipotential line under different crack spacing. The experimental results showed that, the greater the crack spacing, the better the fracturing stimulation effect of radial wells, the bigger the controlled drainage area, which were more conducive to enhancing oil recovery; With the increase of crack spacing, the increase rate of production capacity gradually decreased; When the crack length increased, the radial well fracturing productivity increased. The crack length had greater effect than the crack spacing on radial well fracturing productivity. Based on the above research, This paper can provide some theoretical support for the research of the radial well fracturing.