东海西湖凹陷探井井身结构设计方法研究

Research on the Design Method of Exploration Well Bore Structure in Xihu Sag of the East China Sea

姜韡 邱康 方华良

JIANG Wei QIU Kang FANG Hualiang

中国石油化工股份有限公司上海海洋油气分公司石油工程技术研究院, 上海 200120; 中国石油化工集团公司海洋石油工程有限公司上海钻井分公司, 上海 201206

Offshore Petroleum Engineering Institute of SINOPEC Shanghai Offshore Oil & Gas Company, Shanghai 200120, China; Shanghai Drilling Company of SINOPEC Offshore Oilfield Services Company, Shanghai 201206, China

东海西湖凹陷探井井身结构在使用的过程中，出现了很多由于井身结构设计不合适而导致的复杂情况，多是由于不能有效地分隔下部出现的异常压力地层，导致在下部井段作业时压漏上部地层。为了解决这一问题，针对东海西湖凹陷井身结构设计难点，从设计方式的角度进行了优化。采用新的设计方式能在封固好分布复杂的地层压力的同时，还最大限度地保证套管直径够大，以满足后续作业要求。

In the process of using the exploratory well bore structure in Xihu Sag of the East China Sea, there are many complex situations caused by the inappropriate design of the well bore structure. Most of them are due to the failure to effectively separate the abnormal pressure formation in the lower part, resulting in pressure leakage in the upper part of the lower well section. In order to solve this problem, the well structure design in Xihu Sag of the East China Sea is optimized from the view of design method. The new design method can not only seal the complicated formation pressure, but also ensure the casing diameter to be large enough to meet the requirements of follow-up operation.

中海石油（中国）东海西湖石油天然气作业公司科研项目"西湖探井深部井段井身结构优化设计"（编号：CCL2017XHPS007DMT）。

https://doi.org/10.3969/j.issn.1008-2336.2019.01.076