阿姆河右岸B 区井身结构优化研究与应用

Research in and application of optimization of wellbore configuration in the Block B at the right bank of Amu Darya

李万军 张玮 王伟 王家禄 吴先忠

LI Wanjun ZHANG Wei WANG Wei WANG Jialu WU Xianzhong

中国石油集团钻井工程技术研究院，北京　100195 中国石油土库曼斯坦阿姆河天然气公司，北京　100010

CNPC Drilling Research Institute, Beijing 100195, China . CNPC Turkmenistan Amu Darya River Gas Company, Beijing 100010, China

阿姆河右岸天然气项目是中国石油和土库曼斯坦能源合作的重要项目。其中，阿姆河右岸B 区地质环境复杂，钻井难度高、风险大，给钻探工作带来诸多困难和挑战，同时对井身结构的设计和优化提出了较高的要求。在简要分析了该地区地质复杂情况及工程钻井技术难点的基础上，结合前期的钻井工程实践，综合考虑各种因素，对该地区的井身结构进行了优化和研究，提出了应根据地层浅部有无次生气藏和高压水而采用四开和三开的井身结构，优化设计后的井身结构方案在该地区进行了推广应用，均大幅缩短了钻井周期71.85 d~126 d，提高了钻井速度5%~42%，取得了较好的应用效果。

The natural gas project at the right bank of Amu Darya is a significant cooperation project between Petro China and Turkmenistan in the field of energy. In this Project, due to the complicated geological environment, high drilling difficulty and high risk in Block B, the drilling and exploration operations will face many difficulties and challenges, and high requirements are come up with for the design and optimization of wellbore configuration. In this study, based on brief analysis of the complicated geological environment and difficulties in drilling technologies, combined with the previous drilling experiences and taking into account various factors, we put forward the 4th-spud and 3rd-spud wellfore configuration based on whether there was secondary gas pool and high pressure water in shallow formations. The optimized wellbore configuration has been promoted and applied in this Block, which has greatly shortened drilling period by 71.85 days to 126 days, improved the drilling rate by 5% to 42%, achieving favorable application effectiveness.

10.13639/j.odpt.2014.02.010