水力深穿透射孔井产能计算方法及开发效果分析

水力深穿透射孔技术的成孔结构、渗流条件与多分支水平井比较接近,因此可以通过多分支水平井产能公式来研究水力深穿透射孔井的产能.从多分支水平井产能公式导出了水力深穿透射孔井的产能公式和表皮系数公式,射孔孔径、孔深、孔数、表皮系数对水力深穿透射孔井产能的影响分析结果表明,增加水力深穿透射孔的孔深和增大孔密,可提高水力深透射孔井的产能,且水力深穿透射孔技术能穿透近井污染带,有效连通地层和井筒,提高产能;水力深穿透射孔技术在薄油层的效果好于厚油层,它更适合对薄油层进行改造和作业.

The Productivity Formula and Effective Factors in Water-Jet Deep Perforation Well

The perforation structure and percolation flow condition of hydra deep perforation technology are similar to that of the multilateral horizontal wells, so the productivity of hydra deep perforation wells can be studied using the productivity formula that fits for multilateral horizontal wells, from which this paper leads out the productivity formula and skin factor formula for hydra deep perforation wells. The analyses on effects of the perforation diameter, perforation length, perforation density and skin factor on the productivity of hydra deep perforation wells show: 1) Perforation length and density greatly impact the production; 2) Hydra deep perforation technology can pierce through contaminated zones of wells, effectively connect the strata and well bore and greatly improve productivity: 3) Hydra deep perforation technology is more suitable for the thin oil reservoir than the thick oil reservoir, which makes it more suitable for carrying on well stimulation and job for the thin oil reservoirs.