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中文摘要：
龙岗构造是四川盆地北部深层天然气勘探开发的重要区域,针对该区域Φ244.5 mm技术套管固井井段长裸眼、含油气层多套、油气显示频繁强烈、钻井过程中涌漏同存问题,将井眼准备、套管选择、优选水泥浆体系与配方、地面施工工艺等提高固井质量的主要技术措施集成优化,并采用空井固井、预应力固井等特色技术,保证了龙岗构造技术套管的固井质量,应用效果良好。
英文摘要：
Longgang structure is an important region of deep gas exploration and development in northern Sichuan basin. Aiming at the problems of long open hole in intermediate casing interval and several clusters of oil and gas layer; and because oil gas showed frequently and strongly, well kick and lost circulation existed simultaneity, main technical measures such as borehole preparation, casing selecting, optimization of cement system and formula, construction technology of ground etc. are integrated and optimized to improve cementing quality in the process of 244.5mm intermediate casing cementing. Empty well cementing and pre-stress cementing technology were adopted to ensure the intermediate casing cementing quality of Longgang structure.
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