Gas-Lift Horizontal Well Completion Techniques for the Sarvak Reservoir of the YD Oilfield
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摘要: 为有效开发YD油田Sarvak油藏,在"一期工程"产能建设中,根据地层岩性、物性及流体性质,并结合气举开发特征,利用PIPESIM软件对气举生产要求的油管尺寸、气举气量、气举阀及生产管柱等进行了优化设计,设计出了与该油藏相匹配的气举、酸化和生产一体化完井生产管柱及配套的完井工具.根据"一期工程"现场实际完成井试油产量与预期产量的分析对比结果,从工程角度对目前Sarvak油藏水平段筛管完井管柱进行了进一步的优化,提出在割缝筛管内增加冲洗管,以便于循环驱替出筛管外环空中的残留完井液,为后续酸化作业提供良好的井筒条件.通过完井技术优化设计,为下一步高效开发Sarvak油藏提供了更为可行的技术支持.Abstract: In order to effectively develop the Sarvak reservoir of the YD Oilfield, PIPESIM software was used to optimize tubing size, gas volume, gas lift valve and the production string in the Phase I Production Capacity Building Plan. Analyses were made based on formation lithology, property and fluid properties, combined with the characteristics of the gas lift development.An integrated gas lift completion string comprising of gas lifting, acidizing and production and supporting completion tools were also developed. Based on the contrastinganalysis of production in well tests and the expected values for those wells in Phase I, screen completion string in horizontal section in Sarvak reservoir was further optimized froman engineering aspect. Adding flushing pipe to the slotted screen was suggested, so that the residual completion fluid in outer circular of the screen could be effectively displaced, providing a clean wellbore for subsequent acidizing treatment. This optimized technique would provide a more reliable support for efficient development of the Sarvak reservoir in the near future.
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Keywords:
- horizontal well /
- gas lift /
- well completion /
- optimizing design /
- Sarvak reservoir /
- YD Oilfield
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