Advancements and Prospects of Monitoring and Intelligent PerceptionTechnology for Wellbore Sealing Integrity
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摘要:
油气井生产过程中的井筒密封完整性演化信息是保障油气资源安全效益开发的基础，传统测井技术难以满足井筒全生命周期完整性的监测需求，实现井筒、地层信息感知与数字技术的高效融合势在必行。为此，国内外以井筒完整性原位感知技术为主要突破口，在声波监测、光纤传感、自感知水泥浆和永久井下测试装置等方面进行了探索。在总结国内外井筒密封完整性监测与智能感知技术进展的基础上，分析了存在的不足与难题，从声波监测技术、分布式光纤传感监测技术、智能水泥浆体系和井下永久测试装置等4方面进行了发展展望，并提出了发展建议，以推动构建智能井筒，实时精准掌握油气井井筒健康状况，促进油气工程技术安全、高效、智能化升级。
Abstract:A comprehensive knowledge of wellbore sealing integrity evolution information during the oil and gas well production is the foundation to ensure the safe and efficient development of oil and gas resources. Traditional logging technology can not meet the needs of monitoring the integrity of the wellbore throughout the whole life cycle, and it is imperative to realize the efficient integration of the wellbore, formation information perception, and digital technology. Therefore, with the in-situ perception technology of wellbore integrity as the main breakthrough, the investigation has been carried out in China and overseas in terms of acoustic monitoring, optical fiber sensing, self-sensing cement slurry, and permanent downhole testing equipment. Based on summarizing the advancements of wellbore sealing integrity monitoring and intelligent perception technology in China and abroad, the existing disadvangates and problems were analyzed. In addition, the development prospect was also made from four aspects: acoustic monitoring technology, distributed optical fiber sensing monitoring technology, intelligent cement slurry system, and permanent downhole testing equipment, so as to build a digital wellbore, accurately understand the dynamic information of the wellbore condition of oil and gas wells in real time, and promote the safe, efficient, and intelligent upgrading of oil and gas engineering .
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Keywords:
- well integrity /
- full life cycle /
- intellisense /
- smart wellbore /
- technological progress /
- development proposal
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图 1 井下水泥环密封性光纤传感室内测试装置
Figure 1. Indoor test device for sealing property of downhole cement sheath on optical fiber sensor
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图 2 大尺寸水泥浆液−电性能测试装置示意
Figure 2. Large-size “liquid-electric” performance test device of cement slurry
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图 3 窜流前后的自感知水泥浆电阻率试验结果
Figure 3. Test results of electrical resistivity on self-perception cement slurry before and after channeling
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