蓬莱7-6构造探井钻井实践

Drilling Practice of Exploration Well in Block 7-6 of Penglai

张子程 杨保健 李亚亮 戴杰 王攀 汤柏松

Zhang Zicheng YANG Baojian LI Yaliang DAI Jie WANG Pan TANG Bosong

中海石油能源发展有限公司工程技术公司, 天津塘沽 300452; 中海石油(中国) 有限公司天津分公司, 天津塘沽 300452

CNOOC EnerTechn-Drilling & Production Co., Tianjin 300452, China; TianjinBranch of CNOOC Ltd., Tianjin 300452, China

蓬莱7-6构造位于渤东低凸起南段，紧邻渤东凹陷和渤中凹陷，该区块处于渤海边缘的走滑断层，地应力复杂，压扭异常易发生垮塌，这都严重影响了钻井作业时效和地质资料的录取。针对蓬莱7-6构造地层钻井作业难点，通过对井身结构进行了优选，并采用优化钻井液体系与性能等技术措施，最终在PL7-6-2井作业中取得了非常理想的效果，在本构造后续的评价井和开发井作业及其他不稳定地层中可以持续推广。

Block 7-6 of Penglai is located in the southern part of Bodong low uplift structure, near the Bodong depression and Bozhong depression.The block is in the strike slip fault at the edge of Bohai, where the crustal stress was complex, abnormal pressure torsion prone to collapse, which affect the drilling time and acquisition of geological data. In view of the difficulty inwell drilling operation, wellbore structure was optimized, and drilling fluid system as well as performance was adjusted to meet the formation.Finally an ideal effect was achieved in drilling operationof Well PL7-6-2. This technique can be wildly used in the follow-up test wells and development wells in this block.

https://doi.org/10.3969/j.issn.1008-2336.2017.04.063