摘要
大直径旋转壁心相较小直径壁心体积更大,更有利于对地层的岩电参数及地质特点进行真实的评价,因此受到各油田青睐。模块式大直径岩心旋转井壁取心仪(MRCT)是中海油服新推出的电驱型大直径旋转井壁取心设备,技术先进,创新点多。仪器的模块化结构设计、隔片放置、岩心长度测量、钻头钻速控制等方面均有技术创新和突破。MRCT在渤海油田经过现场作业取得了良好的效果,从声波140 us/ft的软地层到声波50 us/ft的硬地层均能取到岩心,满足了渤海油田对大直径壁心的需求,提高了取心的收获率。但是电驱型大直径旋转井壁取心仪在作业中也暴露出了一些缺点,需要在后续研发中进行改进。
Compared with the small diameter wall core,the large diameter rotating wall core has a larger volume,which is more conducive to the real evaluation of the formation's petroelectric parameters and geological characteristics,so it is favored by various oilfields.Maximum Rotary Sidewall Coring Tool(MRCT)is a new generation of electrically driven large diameter rotary wellbore coring device launched by COSL with advanced technology and many innovative points.The instrument has made technological innovations and breakthroughs in modular structure design,spacer placement,core length measurement,and drilling speed control of drill bit.Through field operation,MRCT has achieved good results in Bohai Oilfield.Cores can be obtained from soft formations of 140 us/ft to hard formations of 50 us/ft,which meets the demand of large diameter wall cores in Bohai Oilfield and improves the harvest rate of coring.However,there are also some disadvantages in the operation of the electrically driven large diameter rotary wellbore drawing,which need to be improved in the subsequent research and development.
作者
苏鹤成
信召玲
张国强
朱文森
李金宜
SU Hecheng;XIN Zhaoling;ZHANG Guoqiang;ZHU Wensen;LI Jinyi(CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300459,China;Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)
出处
《海洋石油》
CAS
2022年第2期73-76,共4页
Offshore Oil
基金
国家重大专项“超低渗地层测试技术与装备”(项目编号:2017ZX05019-004)。
关键词
电驱型
大直径
壁心
收获率
electrically driven
large diameter
core
harvest rate
