后效体复合射孔增产增注技术研究与应用

Research and Application of Aftereffect-Based Compound Perforation Technique

针对常规射孔及爆燃复合射孔对油气储层的污染解除不彻底和地层改造较弱的状况,本文探讨了后效体复合射孔技术机理及其现场试验效果。后效体复合射孔是利用常规射孔所形成的高温高压环境引起反应器中的后效粒子发生化学反应,形成二次高压冲击环境,达到解除地层污染,提高近井地带渗透性目的。实验表明,在实施集成复合射孔作业时,后效体对地层改造还有协同增效作用。该技术可以应用于油井及注水井的增产增注措施,以及致密油气层或页岩油气层降低破裂压力的前置处理措施。

In view of the incomplete discharge of the oil and gas reservoirs by the conventional perforation and deflagration perforation, this paper discusses the mechanism of aftereffect-based composite perforation, and analyzes the effect of the field test. Aftereffect-based composite perforation is a high temperature and high pressure environment formed by conventional perforation, which causes the reaction of the aftereffect particles in the reactor. The two times the high pressure impact environment is formed to remove the formation pollution and improve the permeability in the near well zone. The experiment shows that when the integrated perforating operation is carried out, the aftereffect has synergistic effect on the formation transformation. The technology can be applied to increase production and increase injection, and pre treatment measures for reducing fracturing pressure in tight reservoir or shale reservoir.