江汉油区油井负压清砂技术探讨

江汉油区历经四十多年开发，地层压力下降，低压油井出砂严重影响油井正常生产，针对低压油井活性水冲砂液无返排、储层污染严重等现场实际问题，通过国内外油井清砂技术调研，在射流泵技术原理基础上，开展油井负压清砂工艺研究与应用，解决了低压油井清砂技术难题，恢复砂埋油层油井正常生产，提高开发中后期油井开发效果。

Probe into Oil Well Negative Pressure Cleaning Technique in Jianghan Oilfield

Gone through over forty years of development, formation pressure in Jianghan Oilfield is decrea- sing and sand production of low--pressure oil wells has a strong impact on their regular production. Aiming at practical problems of no backflow of active water sand cleaning fluid from low--pressure wells and seri- ously polluted reservoir stratum, research and application of oil well negative pressure cleaning technique are carried out through the survey on domestic and overseas cleaning techniques and on the basis of the theory of jet pump technique. The research and application have solved the technical problem of low--pressure oil well cleaning, and helped resume regular production of wells of sand--covered reservoir and make oil--well de- velopment in the middle and later periods more efficient.