letter of advice通知單
letter of authoyity授權書
lab house值班房
labour contract勞務合同
labour cost勞務費用
labour distribution chart工人出勤表
labour insurance勞動保險
ladder belt安全帶
landing depth下入深度
landing nipple定位短節，提升短節
landing string下井管柱
land operation陸上作業
large producer高產井
laser-beam plotter激光繪圖儀
laser printer激光打印機
last casing完井套管
lateral側面的
lateral axis橫坐標
lateral core 井壁取心
lateral drilling 水平鉆井，側向鉆井
lateral segment水平井段
lateral well水平井，側鉆井
laterolog側向測井
lead pig鉛罐
lay tongs管鉗
lost circulation洗井液漏失，井漏
LDL（litho-density log） leakage漏失
leak detection檢漏，查漏
lease rent租賃費
lease term租賃期
leasing of equipment設備出租
legal person法人
legal personality法人資格
legitimate right合法權利
length overall總長
less permeable layer低滲透層
less waxy crude低含蠟原油
letter of guarantee擔保書
letter of intent意向書
letter of introduction介紹信
level 1 maintenance一級維修保養
limestone石灰巖
liability責任，義務，債務
liability for breach of contract違約責任
liability of damage損壞賠償責任
license許可證，執照
lift sub（nipple）提升短節
limitation of liability責任范圍
liquid nitrogen液氮
lined-cavity charge聚能射孔彈
line the hole下套管
liquid damping液壓減震器
liquid level test液面測試
liquefied petroleum gas液化石油氣
lithic fragment 巖屑
lithologic hydrocarbon reservoir巖性油氣藏
laterolog deep深側向測井
laterolog shallow淺側向測井
LDL（litho-density log）巖性密度測井
litho-porosity log巖性孔隙度測井
little slam小滿貫測井法
LSS（long-spaced sonic log）長源距聲波測井
log measured from測井起始深度
log測井，測井儀，測井曲線，錄井
logging cabin測井房，錄井房
logging cable測井電纜
logging gauge測井儀
logging interval測井井段
logging-while-drilling tool隨鉆測井儀
logging interpretation測井解釋
long horizontal traverse well，high-angle deviated well大斜度井
look for bottom探井底
loosen a connection松扣
loss泥漿漏失，井漏
loss of gauge不合標準，不合規格
loss of well control井失控
lost item（井底）落物
lower sheave地滑輪
low-permeability低滲透率
low productivity well低產井
low-water-cut well低含水井
letter report書面報告
lump sum contract總包合同
lump sum fee 一攬子費用
lump work包干作業
logging while drilling隨鉆測井
multi-arm caliper多臂井徑儀
magnifier放大器
maiden field未開發的油氣田
main layer主力油層
main office總公司
main producing horizon主力生產層
maintenance center維修基地
maintenance cost維修費用
maintenance crew維修隊
maintenance gang維修班
maintenance man維修工
maintenance manual維修手冊
maintenance overhaul日常維修
maintenance report維修保養記錄
maintenance supply維修器材
major overhaul 大修
major reservoir主力油層
major terms常用術語
make a pull起鉆
make a trip起下鉆
male thread公扣
malfunction故障，性能不良
maloperation無操作
male and female joint公母扣接頭
man –made fracture人造裂縫
man-made recovery人工開采
manual of operations操作手冊
magnetic mark磁記號
maximum allowable operating pressure最大允許工作壓力
marginal field邊緣油田
marginal flood邊緣注水
marine drilling platform海上鉆井平臺
marine operation海上作業
marine petroleum exploitation海上石油開采
master map原始資料圖
master plan總體規劃
maturing field老油田
maximum deviation最大井斜
maximum design pressure最高設計壓力
maximum flow（rate）最大流量
maximum penetration最大穿透深度
maximum wellhead pressure最高井口壓力
mudstone泥巖
measurement depth實測井深
measured error測量誤差
measured signal被測信號
measured value實測值
measurement precision測量精度
measurement range 測量范圍
measurement well測試井
MWD（measurements while drilling）隨鉆測井
microlog微電極測井
MSFL（microspherically focused log）微球形聚焦測井
mechanical fault（failure）機械故障
mechanical performance機械性能
mechanical work機械作業
memorandum備忘錄
microlaterolog微側向測井
micro-resistivity log微電阻率測井
ministerial standard部頒標準
moving in pulling unit起油管作業機運進井場
moving in rig鉆機運進井場
miscalibration標定錯誤
miscible phase混相
misfire未引爆，未發射
mishap意外事故，機械事故
misinterpretation解釋錯誤
moving in service rig修井機運進井場
moving in tools儀器設備運進井場
magnetic mark depth磁記號深度
money order匯票
MOA（memorandum of agreement）協議備忘錄
mobile drilling rig車載鉆機
mobile house 活動房
mobile operation流動作業
mobilization and demobilization fees動復員費
mobilization charge動員費
model contract標準合同
model machine樣機
model number型號
moving out equipment設備運出井場
modern perforating practice現代射孔技術
monitor well監測井
monkey活動扳手，井架工
monocable，monoconductor，monoconductor cable，monoconductor line單芯電纜
monkey wrench管鉗，活動扳手
monophase單相
monthly report月報
morning shift早班
mothballed plant封存裝置
movable pulley動滑輪
maintenance prevention安全設施
master repair schedule大修日程安排
margin of safety安全系數
material specifications材料規格
maximum surface pressure最高井口壓力
minimum shooting interval最小射孔井段
mud cake泥餅
mud damage泥漿對地層的損害
mud filtrate泥漿濾液
mud fluid泥漿
mud logging泥漿錄井
mud lubrication泥漿壓井
mud pit泥漿池
mud socket撈砂筒
mud resistivity log 泥漿電阻率測井
mudstone泥巖
multi-cable，multi conductor ，multicore cable多芯電纜
multimeter萬用電表
multiple completion多層完井
multiple fracturing多次壓裂
multiple runs多次起下作業
multizone –flooding多層注水
multizone reservoir多層油氣藏
multi-finger caliper多臂井徑儀
XMAC（multipole array acoustic log）數字交叉偶極子陣列聲波
