摘要
南海西部某油田L2地层低孔低渗、井控储量较小、井间距较大,采用超短半径水平井打开目的层可最大限度地增加泄油面积、大幅度增加单井控制储量。WZ-X1井采用柔性钻杆,配合相应尺寸的钻头进行造斜及水平钻进,仅用2.4 m造斜,钻进井斜从37°增斜至87°,随后沿储层稳斜钻进60~62 m,井眼轨迹控制精度可达±2°左右。文章重点介绍了短半径侧钻水平井轨迹控制技术,通过设计相匹配的钻具组合,专利设计的造斜、钻进钻头,精确轨迹计算,现场实施中,根据地层变化实时调整钻进参数,取得了良好的轨迹控制效果,形成一套超短半径水平钻井轨迹控制技术。该技术解决超短半径轨迹控制难题,使水平钻井轨迹沿储层延伸,对于提高单井泄油面积和控制储量具有积极意义,对后续类似作业有一定参考借鉴作用。
L2 formation of X Oilfield in western South China Sea is of characteristic of low porosity,low permeability and well controlled reserves,and long well interval,drainage area and controlled reserves can be significantly increased by adopting ultra-short radial radius drilling technology.Flexible drill pipe and drill bit were used in Well WZ-X1 to perform kick-off operation with only 2.4m footage to increase inclination from 37°to 87°,and hold its inclination by drilling 60-62m alongside reservoir with trajectory control margin of±2°.This paper highlights the trajectory control technology with research of BHA,build-up and hold drill bit,and accurate calculation.During the field operation,drilling parameter was adjusted on the basis of formation variation and outstanding trajectory effect was accomplished and ultra-short radial radius trajectory control technology was achieved.This technology can solve the problem of trajectory control and extend horizontal section of reservoir.It can increase wellbore drainage area and well control reserves,providing technical reference for future operation.
作者
管申
郭浩
程林
张铖
刘智勤
艾常明
GUAN Shen;GUO Hao;CHENG Lin;ZHANG Cheng;LIU Zhiqing;AI Changming(Zhanjiang Branch of CNOOC(China)LTD,Zhanjiang,Guangdong 524057,China;Directional well Service Co.of CNPC Bohai Drilling Co.;Engineering Technology Zhanjiang Branch of CNOOC Energy Development Co.LTD,Zhanjiang,Guangdong 524057,China)
出处
《钻采工艺》
CAS
北大核心
2020年第6期21-23,27,I0002,共5页
Drilling & Production Technology
基金
2019年中海油集团公司综合科研项目“北部湾油田经济开发钻完井技术研究”(编号:YXKY-2019-ZJ-04)。
关键词
钻井
超短半径
柔性钻具
造斜钻头
轨迹控制
well drilling
ultra-short radius
flexible drill pipe
deviation bit
well trajectory control
