unload排液，放空

uncased hole（well）未下套管井，裸眼井

undamaged perforation無污染射孔

underbalanced perforation負壓射孔

underground work井下作業

unexpected pay（expenses）不可預見費用

unopened perforation堵塞的射孔孔眼           

unrecoverable bridge plug不可回收橋塞

unscheduled event意外事件                   

unscheduled shutdown計劃外停工

unscrew松扣，卸扣 unset packer封隔器解封

validity of the contract合同的效力             

validity of treaty協議的效力

VDL（variable density log）變密度測井         

venture analysis風險分析

verbal agreement口頭協定          

vernier caliper gauge游標卡尺

vertical oriented perforation垂直定向射孔 

vertical well直井

virgin formation 未射開的地層                

virgin reservoir未開采的油氣藏

viscosity粘度 viscous crude 稠油

viscous crude oil production，viscous oil recovery稠油開采

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

wall rock圍巖

warning board警告牌

warning notice警告標志

washing fluid洗井液

wash over洗井

water-based mud水基泥漿

water-based drilling fluid水基鉆井液     

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

water cushion水墊，測試墊

water cut meter含水率測量儀

water detector for annular log環空測井找水儀，環空測試儀

water breakthrough（生產井）見水，出水

water drive水驅

watered-out zone，water flooded layer水淹層

waterflood注水

waterflood front水驅前緣

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

water flush水循環洗井

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注水井測試       

water injection response注水效果

water-out reservoir水淹油層

water percentage含水率

water producer水淹井，油井出水

water tanker水罐車

wax-bearing crude含蠟原油

wax removal清蠟

weak bonding膠結不好

wireline entry guide喇叭口

weight bar，weight section加重桿

wellbore damage井筒污染

well bore configuration井身結構

wellbore effect井筒影響

wellbore gauging井徑測量

wellbore quality井身質量

well-calipering apparatus井徑儀

well-cased perforating套管射孔

well cementing operation固井作業

well clean up，well cleanout洗井

well completing test完井測試

well completion practice完井作業

well completion fluid完井液

well control device井控裝置

well control fluid壓井液

well control operating壓井作業

well head，well head assembly，wellhead device井口，井口裝置

well head duty house井口值班房

well head shut-in井口關井

well kick井涌

well killing job（operation）壓井作業

well logging gauge測井儀

well measurement井下測量

well on the beam抽油井

well placement井位

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

well pumping unit抽油機

well service work修井作業

well repair修井

well sampling井下取樣

well screen井下篩管

well site illumination井場照明

well site layout井場布置

well site surveillance井場監督

well testing operation測試作業

well testing service測試服務

well testing supervisor試油監督           

well testing truck測試車

well test planning試油計劃

well thermometer井溫儀

well-to-well tracer test井間示蹤劑測試

well workover修井

wet connector濕接頭

WFT（wireline formation test）電纜地層測試

wellhead platform井口平臺

winch 絞車

winch barrel（drum）絞車滾筒

winch brake絞車剎車

winchman絞車司機

winchman control panel絞車控制面板

winch truck吊車

wireline blowout preventer鋼絲繩防噴器

wireline clamp電纜繩卡

wireline hitch電纜繩套

wireline perforation gun電纜射孔槍

wireline plug電纜橋塞

wireline-set packer電纜坐封封隔器

wireline trip電纜起下作業

wireline truck，wireline winch unit電纜絞車

wireline telemetry cartridge電纜遙測短節

wire rope鋼絲繩

wire-stripping pliers剝線鉗

workover修井

workover rig修井機

work order工作定單

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施工圖

working index工作指標

working instruction（specification）操作規程

working operation工序

working quarter作業區

working rule操作規則

working site現場

working-yard施工現場

work injury工傷

workover job（operation修井作業）

work sheet施工單，明細表

workstation解釋站

work the pipe free活動管柱使之解卡

wrecker急救車，急救船

written contract書面合同

written report書面報告

zero clearing清零

zero length零長

zonal injection分層注水

zonal testing分層測試

zone 1 hazardous area一級危險區

zones classification危險區域劃分

Z-density log  Z—密度