文75X1井长裸眼长封固段小间隙小尾管固井实践

Practices of Small Liner Cementing of Wen75X1 Well in Small Clearance of Long Cementing Segment in Long Openhole

摘要:

小井眼开窗侧钻技术很好地解决了油水井无法继续进行生产的问题，起到“死井复活”、提高采收率、降低成本的目的。文75X1井是部署在文安斜坡史各庄构造带文75断块上位置的一口小井眼开窗侧钻井，完钻井深3376 m，井斜34.64°，裸眼段长达1164 m，下入φ95.3 mm小尾管固井，存在环空间隙小、封固段长、套管居中度难以保证以及套管安全下入井底难度大等一系列难题，通过采取有效通井措施、扶正器安放提高套管居中度、弹性低密度高强度水泥浆体系技术等固井工艺技术，经质量检测，固井合格率100%，优质率高达92%，为类似的长裸眼长封固段小间隙井小尾管固井质量的技术措施提供参考。

Abstract:

The continue production of oil and water wells is well settled by slimhole sidetracking technology, the recovery efficiency improvement with lowr cost and restoration of the “dead wells” are realized. Wen 75X1 well is a sidetracked slimhole located at Wen75 fault block of Shigezhuang structural belt of Wen'an slope, its terminal depth is 3376m with inclination of 34.64 degrees and openhole segment of 1164m. φ95.3mm small liner was put down for cementing, there were unfavourable conditions of small annular clearance and long cementing segment and it was difficult to keep casing in center position and ensure casing running down to the bottom. By adopting effective drifting methods, centralizer placing, elastic low density high strength cement slurry system and other cementing technologies, the quality detection results are 100% and 92% for cementing qualification rate and high quality rate respectively.