CAJ | 학술논문

华北油田部分油藏注水井注水压力高、出砂严重，导致注水井频繁出现砂埋、套变，严重制约了油田注水开发。为解决常规和带压冲砂作业风险高、效果差、周期长的难题，提出了在带压注水井中利用连续油管实施冲砂洗井；通过在京11、岔河集等油田58口井现场作业表明，该工艺冲砂工序简单，施工周期短；对长期砂埋停注待大修井的恢复作用较好，可减少作业队伍占用。该技术为砂埋停注待大修的注水井重新恢复正常注水提供了一种新途径，具有极为重要的推广价值。
화북유전부분유장주수정주수압력고、출사엄중，도치주수정빈번출현사매、투변，엄중제약료유전주수개발。위해결상규화대압충사작업풍험고、효과차、주기장적난제，제출료재대압주수정중이용련속유관실시충사세정；통과재경11、차하집등유전58구정현장작업표명，해공예충사공서간단，시공주기단；대장기사매정주대대수정적회복작용교호，가감소작업대오점용。해기술위사매정주대대수적주수정중신회복정상주수제공료일충신도경，구유겁위중요적추엄개치。
The injectors in part of Huabei oilifeld reservoirs have high injection pressure, and severe sanding problem, leading to frequent sand burying and casing deformation, which affects severely water injection development of the ifeld. To ifx the dififculties of high risk, poor effect, and long cycle about conventional and pressure sand washing operations, it was proposed to take use of coiled tub-ing to conduct the sand washing work. The applications on 58 wells in Jing 11 and Chaheji ifelds showed that the technology had simple procedure and short operation cycle. It had good recovery effect for long-term sand buried injectors and could decrease man power occu-pation. The technology supplies a novel method of recovering water injection for sand buried injectors, and it has great promotion value.