准北区块钻井液体系的优化及应用

Optimization and application of drilling fluids in Zhunbei Block

邱春阳 李蕾 秦涛 姜春丽 陈二丁 王宝田

中国石化胜利石油工程有限公司钻井工程技术公司，山东 东营 257064

Drilling Engineer Technology Corporation, Shengli Petroleum Engineering Corporation Limited, SINOPEC, Dongying 257064, China

准北区块地质构造复杂，施工中对钻井液性能要求高。在对准北1井所用钻井液体系应用情况进行分析后，对其所使用的聚胺磺化封堵防塌钻井液体系进行优化，增强了钻井液体系的封堵性能，形成了聚胺纳米封堵钻井液体系。优化后的聚胺纳米封堵钻井液体系在准北2井进行了现场应用，平均井径扩大率低，达到了低密度下井壁稳定的良好效果。

The technology difficulty of drilling fluid is very great in Zhunbei Block because the geologic structure is very complex. Analyzing the application effect of drilling fluid applied to Zhunbei 1 Well, the poly-amine and sulfonation drilling fluid with formation sealing and anti-caving ability was optimized, and the formation sealing property was improved. The poly-amine nano-technology formation sealing drilling fluid was researched and developed. The optimized drilling fluid was applied to Zhunbei 2 Well, resulting in low rate of average hole diameter enlargement and good effect of wellbore stability under the condition of low density drilling fluids.

10.6056/dkyqt201805023