水平分支井技术在东海的实践分析

Practical Analysis of Horizontal Branch Well Technology in the East China Sea

雷磊 李乾 张海山 黄召

LEI Lei LI Qian ZHANG Haishan HUANG Zhao

中海石油（中国）有限公司上海分公司，上海　200120 中国石油化工股份有限公司上海海洋油气分公司，上海　200120

Shanghai Branch of CNOOC Ltd., Shanghai 200120, China SINOPEC Shanghai Offshore Oil &Gas Company, Shanghai 200120, China

东海中低渗、特低渗油气藏资源占总资源量的90%以上，低渗、特低渗油气田的有效开发是东海目前主要攻关方向，应用水平分支井可有效提高常规低渗油气田单井产能，未来将规模应用水平分支井开发低渗油气田。因此，通过分析东海已实施水平分支井，深入总结研究水平分支井钻井技术既可以提高作业时效，又为东海油气田的大力开发提供可靠的技术保障。此文从侧钻工具、钻头、悬空侧钻工艺、隔墙等方面深入分析水平分支井钻井技术，结合东海XX气田水平分支井现场实钻情况，总结出水平分支井在东海油气田现场应用的关键技术，为以后水平分支井在东海的推广和应用提供了大量可借鉴的经验。

Low permeability and ultra-low permeability oil and gas reservoir resources account for more than 90% of the total resources in the East China Sea. The effective development of low permeability and ultra-low permeability oil and gas fields is the main research direction in the East China Sea at present. The application of horizontal branch wells can effectively improve the single well productivity of conventional low permeability oil and gas fields. In the future, horizontal branch wells will be used to develop low permeability oil and gas fields on a large scale. Therefore, by analyzing the implementation of horizontal branch wells in the East China Sea and deeply summarizing the drilling technology of horizontal branch wells, we can not only improve the operation efficiency, but also provide reliable technical support for the vigorous development of oil and gas fields in the East China Sea. In this paper, the drilling technology of horizontal branch wells is deeply analyzed from the aspects of sidetracking tools, drill bits, suspended sidetracking technology and partition walls, etc. Combined with the actual drilling situation of horizontal branch wells in XX gas field in the East China Sea, it summarizes the key technology of horizontal branch wells in oil and gas fields of the East China Sea, which provides a lot of experience for the promotion and application of horizontal branch wells in the East China Sea in the future.

https://doi.org/10.3969/j.issn.1008-2336.2021.02.093