CAJ | 학술논문

为解决元坝气田开发井三开技术尾管安全下入和提高封固质量的技术难点，在分析总结元坝气田陆相地层固井技术难点的基础上，根据套管悬重与悬挂器坐挂后的过流面积选择合理的非标准尾管悬挂器，确定了尾管悬挂器的性能参数；根据固井防气窜与提高固井质量的要求，选择了合适的水泥浆与前置液体系；为保证套管安全下入和提高水泥环胶结质量，制定了针对性的通井、承压及循环洗井等井眼准备措施；为提高水泥浆顶替效率，设计了合理的入井管串结构与固井工艺措施，形成了可以提高陆相复杂地层固井质量的综合固井技术。该技术在元坝气田现场应用后，固井质量合格率达100％，优质率达54.5％。研究结果表明，大尺寸非标准尾管固井技术可以解决元坝气田陆相地层的固井技术难点。
위해결원패기전개발정삼개기술미관안전하입화제고봉고질량적기술난점，재분석총결원패기전륙상지층고정기술난점적기출상，근거투관현중여현괘기좌괘후적과류면적선택합리적비표준미관현괘기，학정료미관현괘기적성능삼수；근거고정방기찬여제고고정질량적요구，선택료합괄적수니장여전치액체계；위보증투관안전하입화제고수니배효결질량，제정료침대성적통정、승압급순배세정등정안준비조시；위제고수니장정체효솔，설계료합리적입정관천결구여고정공예조시，형성료가이제고륙상복잡지층고정질량적종합고정기술。해기술재원패기전현장응용후，고정질량합격솔체100％，우질솔체54.5％。연구결과표명，대척촌비표준미관고정기술가이해결원패기전륙상지층적고정기술난점。
In order to solve the difficulties of running casings safely and increasing the cement quality of liners in Yuanba Gas Field ,on the basis of analyzing the factors affecting the cementing quality ,the pa-rameters of hanger are confirmed by casing weight and flow area ;the performances of cement slurry and a-head fluid are optimized to satisfy the requirements of preventing gas breakthrough in cementing and in -crease the cementing quality .Besides ,the borehole preparation is strengthened ,including running gauge cutter ,pressuring and cleaning well .In order to improve the efficiency of displacing ,the specific string structure and the technologic measures for cementing are designed .Consequently ,the qualification rate ri-ses to 100% and the high quality rate reaches 54.5% .The technology has successfully solved the difficul-ties of cementing technology from continental facies in Yuanba Gas Field .