塔河油田碳酸盐岩漏失井先期裸眼完井配套技术研究及应用

Open hole completion technology for carbonate leaking wells, Tahe oil field

张佳 李晓胜 赵忠辉 杨坤

Zhang Jia Li Xiaosheng Zhao Zhonghui Yang Kun

中国石化 西北油田分公司 完井测试管理中心, 新疆 轮台 841600

Completion Test Management Center, SINOPEC Northwest Company, Luntai, Xinjiang 841600, China

塔河油田为古生界奥陶系碳酸盐岩缝洞型油藏，储层平均埋深5 300~5 720 m，最大埋深7 143 m，非均质性极强，钻遇放空漏失率高达30%，漏失量大，平均单井漏失钻井液560余方，漏失井完井方式主要为先期裸眼完井。传统的完井配套技术在组下完井管柱及穿换井口过程中存在较大井控安全隐患，通过对井口控制技术、完井管柱安全组下技术两方面的优化研究，从根本上消除了作业安全隐患，保证了高风险井完井井控安全，节约了作业成本。

The Tahe oil field is a carbonate fractured-and——vuggy reservoir in Ordovician. Reservoir depth averages 5 300-5 720 m, with a maximum of 7 143 m. It has a strong heterogeneity, and drilling leakage rate reached 30% with a large leaking volume, about 560 m3 of drilling fluid for each single well. Open hole completion technology was applied to leaking wells. The traditional well completion technology has some shortcomings when grouping completion pipe column and changing for wellhead. We optimized wellhead controlling technology and the safe deployment of well completion pipe string, which fundamentally eliminated hidden troubles to ensure the safety of high-risk operations, controlled well safety, and saved operation cost.

https://doi.org/10.11781/sysydz2016S1118