“井工厂”作业时直井段防碰设计与控制探讨

Anti-collision design and control of vertical section in ‘well plant’ mode

梁奇敏 何俊才 董文涛 张翼 刘新云 耿东士

LIANG Qimin HE Juncai DONG Wentao ZHANG Yi LIU Xinyun GENG Dongshi

中国石油勘探开发研究院 大庆钻探工程公司钻井二公司 中国石油集团钻井工程技术研究院 中国石油大学华东石油工程学院

Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China No.2 Drilling Company of CNPC Daqing Drilling & Exploration Engineering Corporation, Daqing, Heilongjiang 163413, China CNPC Drilling Research Institute, Beijing 102206, China

“井工厂”在石油开采中已得到广泛应用，特别是非常规油气资源的勘探和开发，能实现钻完井批量化和流水线施工，有效提高作业效率，降低作业成本。但由于井间距普遍较小，直井段轨迹受诸多因素影响不能完全钻直，与邻井的碰撞风险很大。指出了在应用“井工厂”技术时，为保证钻井绝对安全，直井段施工不仅要严格控制井斜角，同时还应控制水平位移；探讨了设计的最小井间距与纠斜点处的井斜角、水平位移以及允许的最大狗腿度等因素间的关系；提出了在直井段允许的最大狗腿度和水平位移的限制条件下对井斜的控制要求。以X 平台的丛式井为例，说明了如何限制丛式井直井段的井斜和水平位移，以及当碰撞风险出现时如何采取纠斜控制措施防碰。

The ‘well plant’ mode has been widely used in oil exploitation, especially in the exploration and development of unconventional oil and gas resources. With this mode, batch drilling and completion can be achieved in an operation line, so that operation efficiency is improved and operation cost is reduced. When this mode is applied, however, the well spacing is generally small, and the vertical section can not be maintained adequately due to many factors, leading to high risks of collision between wells. In this paper, it is proposed that vertical section should be drilled with both inclination and horizontal displacement strictly controlled in order to ensure the safety of well drilling in the ‘well plant’ mode. The relationships between the designed minimum well spacing and the inclination and horizontal displacement at the straightening point or the maximum allowable dogleg severity were discussed, and the control requirement on the inclination was proposed under the constraint of maximum allowable dogleg severity and horizontal displacement. The cluster well on X-Pad was taken as an example to illustrate how to control the inclination and horizontal displacement of vertical section of cluster well and what straightening measures to be taken when any collision may occur.

10.13639/j.odpt.2016.03.005