深水救援井动态压井设计方法及应用

Design method for dynamic well killing of deepwater relief well and its application

赵维青 刘正礼 宋吉明 黄小龙 姜清兆 庞东豪

ZHAO Weiqing LIU Zhengli SONG Jiming HUANG Xiaolong JIANG Qingzhao PANG Donghao

中海油能源发展股份有限公司工程技术公司 中国海洋石油有限公司深圳分公司

Engineering Company of CNOOC Energy Technology & Services Limited, Shenzhen, Guangdong 518606, China

通过救援井向井喷井高排量泵入不同密度的压井液进行压井的方法，已成为救援井压井方案的首选。简单阐述了动态压井技术原理，给出动态压井设计的关键点和设备选型的方法。通过1 口井实例给出了动态压井设计的流程，并根据最恶劣工况（WCD： Worst Case Discharge）进行了多层储层井喷时动态压井模拟，基于动态压井给出了压井液密度、平台设备选择等方法。认为深水动态压井设计应考虑井喷井流体类型、井喷流通通道、水深影响下的井筒流量等因素。与常规压井方法相比， 深水动态压井具有排量大（最大达到12 m3/min）、地面泵压高（最高达到26 MPa）、所需压井液体积大（最大达到2 100 m3）等特点，可以为救援井动态压井设计思路、平台钻井液泵、钻井液储存能力等设备选型提供参考。

The method of pumping killing fluid with different densities at high flow rate into blowout well through relief well is the first choice of well killing by relief well. This paper briefly sets forth the technical principle of dynamic well killing and provides the key points in dynamic well killing design and the method of equipment selection. The flow of dynamic well killing design was given in an example of one well, and the simulation of dynamic killing of multi-reservoir blowout was carried out under WCD (worst case discharge). The paper also gives the methods for selection of killing fluid density, platform equipment, etc. based on dynamic well killing. It is thought that the deepwater dynamic well killing design should take into account the fluid types of blowout well, blowout flow channels, wellbore flowrate under the effect of water depth, etc. Compared with conventional well killing method, deepwater dynamic well killing method is characterized by large displacement (max. up to 12 m3/min), high surface pump pressure (max. up to 26 MPa), large volume of required killing fluid (max. up to 2 100 m3), etc. All these can be used as a reference to the concept of design of dynamic well killing through relief well, drilling fluid pump on the platform, drilling fluid storage capacity, equipment selection, etc.

10.13639/j.odpt.2016.02.011