同轴随进式射孔在靖边后山村区域应用效果评价

Application Effect of Coaxial Following Perforation Technology in a Reservoir in Jingbian Houshancun Area

鄂尔多斯盆地是中国大型的沉积盆地之一,针对其储层的物性差、孔隙度低、渗透率小、非均质性严重等特点,延长油田引进了同轴随进式射孔技术。同轴随进式增效射孔器可以形成高速侵彻射流,以微秒级速度依次穿透射孔枪管、套管、水泥环进入地层形成射孔孔道。在延长油田靖边采油厂后山村区域应用中可以有效破除压实带,形成放射状裂缝,提高岩层渗透率,从而达到降低破裂压力和增产、增注的功能。

Erdos basin is one of large sedimentary basins in China. Aimed at the poor physical-property, low permeability and obvious anisotropism, the coaxial perforation technology has been introduced. The coaxial perforation gun perforator can form high speed jet penetration and penetrate gun-barrel, casing, cement mantle one by one at microsecond speed, and then the perforation hole is formed. The perforation can get rid of compaction zone effectively to form radial cracks and improve the permeability, so then it reduces the fracture pressure and increase the production.