unload排液，放空

uncased hole（well）未下套管井，裸眼井

undamaged perforation无污染射孔

underbalanced perforation负压射孔

underground work井下作业

unexpected pay（expenses）不可预见费用

unopened perforation堵塞的射孔孔眼           

unrecoverable bridge plug不可回收桥塞

unscheduled event意外事件                   

unscheduled shutdown计划外停工

unscrew松扣，卸扣 unset packer封隔器解封

validity of the contract合同的效力             

validity of treaty协议的效力

VDL（variable density log）变密度测井         

venture analysis风险分析

verbal agreement口头协定          

vernier caliper gauge游标卡尺

vertical oriented perforation垂直定向射孔 

vertical well直井

virgin formation 未射开的地层                

virgin reservoir未开采的油气藏

viscosity粘度 viscous crude 稠油

viscous crude oil production，viscous oil recovery稠油开采

void contract无效合同 VSP（vertical seismic profiling）垂直地震剖面

wall rock围岩

warning board警告牌

warning notice警告标志

washing fluid洗井液

wash over洗井

water-based mud水基泥浆

water-based drilling fluid水基钻井液     

water-bearing bed（formation，layer，zone）含水层

water cushion水垫，测试垫

water cut meter含水率测量仪

water detector for annular log环空测井找水仪，环空测试仪

water breakthrough（生产井）见水，出水

water drive水驱

watered-out zone，water flooded layer水淹层

waterflood注水

waterflood front水驱前缘

waterflood injection well，water injection well，water input well注水井

water flush水循环洗井

water injection profile注水剖面，吸水剖面

waterflood project注水方案

water injection well stimulation注水井增注措施

water injection well testing注水井测试       

water injection response注水效果

water-out reservoir水淹油层

water percentage含水率

water producer水淹井，油井出水

water tanker水罐车

wax-bearing crude含蜡原油

wax removal清蜡

weak bonding胶结不好

wireline entry guide喇叭口

weight bar，weight section加重杆

wellbore damage井筒污染

well bore configuration井身结构

wellbore effect井筒影响

wellbore gauging井径测量

wellbore quality井身质量

well-calipering apparatus井径仪

well-cased perforating套管射孔

well cementing operation固井作业

well clean up，well cleanout洗井

well completing test完井测试

well completion practice完井作业

well completion fluid完井液

well control device井控装置

well control fluid压井液

well control operating压井作业

well head，well head assembly，wellhead device井口，井口装置

well head duty house井口值班房

well head shut-in井口关井

well kick井涌

well killing job（operation）压井作业

well logging gauge测井仪

well measurement井下测量

well on the beam抽油井

well placement井位

well pulling machine（unit），well service hoist，well servicing rig（unit）修井机

well pumping unit抽油机

well service work修井作业

well repair修井

well sampling井下取样

well screen井下筛管

well site illumination井场照明

well site layout井场布置

well site surveillance井场监督

well testing operation测试作业

well testing service测试服务

well testing supervisor试油监督           

well testing truck测试车

well test planning试油计划

well thermometer井温仪

well-to-well tracer test井间示踪剂测试

well workover修井

wet connector湿接头

WFT（wireline formation test）电缆地层测试

wellhead platform井口平台

winch 绞车

winch barrel（drum）绞车滚筒

winch brake绞车刹车

winchman绞车司机

winchman control panel绞车控制面板

winch truck吊车

wireline blowout preventer钢丝绳防喷器

wireline clamp电缆绳卡

wireline hitch电缆绳套

wireline perforation gun电缆射孔枪

wireline plug电缆桥塞

wireline-set packer电缆坐封封隔器

wireline trip电缆起下作业

wireline truck，wireline winch unit电缆绞车

wireline telemetry cartridge电缆遥测短节

wire rope钢丝绳

wire-stripping pliers剥线钳

workover修井

workover rig修井机

work order工作定单

water oil contact油水界面

work accident操作事故

work flow工作流程

working cloths工作服

working drawing施工图

working index工作指标

working instruction（specification）操作规程

working operation工序

working quarter作业区

working rule操作规则

working site现场

working-yard施工现场

work injury工伤

workover job（operation修井作业）

work sheet施工单，明细表

workstation解释站

work the pipe free活动管柱使之解卡

wrecker急救车，急救船

written contract书面合同

written report书面报告

zero clearing清零

zero length零长

zonal injection分层注水

zonal testing分层测试

zone 1 hazardous area一级危险区

zones classification危险区域划分

Z-density log  Z—密度