native pressure原始地層壓力

natural completion 正常完井

natural decline（depletion）自然遞減

natural gamma ray log自然伽馬測井

NGS（natural gamma ray spectrometry log） 自然伽馬能譜測井

natural potential自然電位 natural production decline 產量自然遞減

neutron –gamma spectrum logging 中子伽馬能譜測井

NLL（neutron-lifetime logging）中子壽命測井

neutron tub中子管

NML（nuclear magnetism log）核磁測井 

NMRI（nuclear magnetic resonance imaging）核磁共振成象

nuclear magnetic resonance log核磁共振測井

numerical control數控

no cost item無價值項目

non-conventional well非常規井

nipple-down tree拆卸井口裝置

near-surface layer表層

negative pressure perforation負壓射孔

near gauge hole井徑規則的井

near wellbore formation damage近井地層損害

negotiated bidding協商招標

negotiated price協商價格

negotiation of contract terms合同條款的協商

net cost成本價

net porosity有效孔隙度

night operation 夜間作業

night shift夜班

nipple接頭，短節

nitrogen cushion氮氣墊

nitrogen displacement替氮

nitrogen service液氮作業

notice of change更改通知單

no-go guide扶正套

nominal power額定功率

nominal voltage額定電壓

non-commercial pool無開采價值的油藏

non-conducting絕緣的

non-damaging drilling無損害鉆井

non-essential stipulation非主要條款

non-fractured reservoir非裂縫性油藏

nonoperator party非作業方

non-paraffinous oil不含蠟石油

nonpay zone非產油層

non-perforated interval非射孔井段

nonproducing reserves未動用儲量      

nonproductive petroleum reservoir無開采價值的油藏

non-recurring repair臨時修理

nonreservoir非儲集層

nonreusable gun一次性射孔槍

non-routine procedure非常規方法

non-routine sampling非常規取樣

nonupset tubing平式油管

normal inspection正常檢查

normal maintenance日常維修

normal production test常規生產測試            

none run未下井，未測

near surface completion表層測井

normal shutdown正常停產

no show oil and gas無油氣顯示

nipple up tree安裝采油樹

nipple up wellhead安裝井口

obligation責任，義務，契約，債務

occupational injury工傷

oil base mud油基泥漿

objective interval目的層段

overall development program總體開發方案

off-angle drilling鉆斜井

off-gas廢氣

office operation室內作業

official copy正本

off-job accident崗位外事故

offset data 鄰井資料                         

offset information對比資料

offsetting injector（與生產井）對應的注水井

offsetting well補償井，鄰井

offshore activities（operation）海上作業

offshore boring 近海鉆探

offshore completion海上完井

offshore drilling海上鉆井

offshore drilling platform海上鉆井平臺

offset log補測的測井曲線

offshore shelf近海大陸架

offshore oil exploration海上石油勘探

offsite surveillance現場外監督

off-take rate開采速度

off-take well 生產井

off-time停工時間，停機時間

oil and gas bearing basin含油盆地

oil-gas contact油氣界面

OH&S（Occupational Health and Safety）職業健康與安全

operation instructions操作說明書

oil initially in place原始石油地質儲量

oil gas accumulation油氣聚集

oil-base drilling fluid油基鉆井液

oil-bearing basin含油盆地

oil-bearing block含油區塊

oil-bearing horizon（zone）含油層

oil-bearing reservoir儲油層

oil-bearing sand含油砂巖

oil-bearing structure含油構造

oil column thickness含油層厚度

oil damper液壓減震器

oil detection石油勘查

oil-displacement mechanism驅油機理

oilfield experience現場經驗

oil field production capacity油田產能

oil-filled cable oil電纜絕緣油

oil finder石油勘探工作者

oil-gas-water three-phase separator油氣水三相分離器

oil recovery technique采油工藝

oil reservoir engineering油藏工程

oil potential潛在儲量

oil producing region采油區

oil property原油性質

oil productivity index采油指數

oil saturation含油飽和度

oil seepage油苗

oil shale油頁巖

oil ship油輪

oil source rock生油巖

oil truck油罐車

oil viscosity油的粘度

oil well casing油井套管

oil well paraffin removal equipment油井清蠟設備

oil well performance data 油井動態資料

oil well pump抽油泵

oil well testing油井測試

offshore installation manager平臺經理

old-well deeper drilling老井加深鉆井

old well worked over老井大修

one trip run起下一次管柱作業

on-site calibration現場調試

on-site interpretation現場解釋

on-site maintenance現場維修

on-site validation現場驗收

on-stream maintenance不停工維修

on-the-job training在職培訓

on-the-job accident操作事故

open bidding公開招標

open fire明火

open-flange flow cross法蘭四通

open-front tower  A形井架

open hole bridge plug裸眼橋塞

open hole caliper井徑儀

open hole completion裸眼完井

open hole DST，open hole test裸眼井地層測試

open hole fishing裸眼打撈

open hole formation（section）裸眼井段

opening of tender開標

open tender公開招標，公開投標

operating agreement作業協議

operating charges操作費用

operating company甲方，作業公司

operating cost作業費用

operating crew施工隊，作業班

operating efficiency作業效率

operating failure操作失誤

operating license操作許可證

operating personnel操作員

operating platform操作平臺

operating program作業程序

operating repair小修

operating risk作業風險

operating tool string施工管柱

operating well測試井，作業井

operational base工作基地

operational contract作業合同

operation license營業執照

operation room操作室

operation study操作培訓

operation through tubing過油管作業

operator party作業方

operator's license操作證

optimal field development program最佳油田開發方案

optimizing fracturing treatment design優化壓裂設計

optimum completion design完井優化設計

optimum feasible program最佳可行方案

oral agreement口頭協定                      

oral contract口頭協議

organic rock有機巖

orientation spool定位短節

orientation well定向井

orientation well survey定向井測量

original drawing原圖

original field recording現場原始記錄

O ring O形圈，密封圈

oriented perforating定向射孔

oscillometer示波器

over time加班

outbid落標

outer armour（電纜）外纜皮

out-of-round oversized hole大肚子井

out of order有故障

output well生產井

overall development plan（program）總體開發方案

overall injection-withdrawal ratio綜合注采比

overalls工作服

overbalanced perforation正壓射孔

overexploitation過度開采

overhaul charge 修理費

overhead charge 管理費，雜項開支

overtime pay加班費

overtonging上扣過緊

old well plugged back老井封堵

old well sidetracked老井側鉆

old well worked over老井大修