高压水射流深穿透射孔增产机理研究

高压水射流技术是切割破岩、清洗除锈、油田增产的新技术。在分析钻井侵入带和常规聚能射孔压实带对油井产量影响的基础上 ,探讨了高压水射流定向深穿透射孔的油井增产机理。研究结果表明 ,采用高压高速射流技术 ,可以切割破岩、减轻近井地带应力集中和穿透近井污染带 ,其结果可以使油井获得增产增注。讨论了该技术用于定向射孔压裂进行油藏改造的可行性

Stimulation mechanism of oil well using high-pressure water jet deep-penetrating perforation technique

High-pressure water jet deep-penetrating perforation technique is an emerging advanced technology for oil well stimulation and has the highly rock-cutting, breaking and cleaning capabilities. The effects of drilling invaded zone and conventional jet perforation compacted zone on production rate of oil well were analyzed. The stimulation mechanisms of oil well oriented from the deep-penetrating perforation with high-pressure water jet were comprehensively investigated. Three main aspects of this technique benefit to enhance the production of oil well, including rock cutting with high-pressure and high-velocity water jet, releasing the stress concentration of the immediate vicinity of well-bore, penetrating contaminated zone near oil well. The applicability of this technique to formation fracturing and acid treatment for improving reservoir was discussed.