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
