L
- LACT – Lease Automatic Custody Transfer
- LAH – Lookahead
- LAOT – Linear Activation Override Tool
- LARS – Launch & Recovery System
- LAT – Lowest Astronomical Tide
- LCM – Lost Circulation Material
- LCNLG – LDT CNL Gamma Ray Log
- LD – Lay Down (tubing, rods, etc.)
- LDL – Litho Density Log
- LDTEP – LDT EPT Gamma Ray Log
- LEAKL – Leak Detection Log
- LEPRE – Litho-Elastic Property Report
- LGR – Liquid Gas Ratio
- LGS – Low (specific-)Gravity Solids
- LINCO – Liner and Completion Progress Report
- LIOG – Lithography Log
- LIT – Lead Impression Tool
- LITDE – Litho Density Quicklook Log
- LITHR – Lithological Description Report
- LITRE – Lithostratigraphy Report
- LITST – Lithostratigraphic Log
- LKO – Lowest Known Oil
- LL – Laterolog
- LMAP – Location Map
- LMRP – Lower Marine Riser Package
- LMV – Lower Master Valve (on a Xmas tree)
- LNG – Liquefied Natural Gas
- LOA – Letter of Authorisation/Agreement/Authority
- LOE – Lease Operating Expenses
- LOGGN – Logging Whilst Drilling
- LOGRS – Log Restoration Report
- LOGSM – Log Sample
- LOLER – Lifting Operations and Lifting Equipment Regulations
- LOT – Leak-Off Test
- LOT – Linear Override Tool
- LOT – Lock Open Tool
- LOTO – Lock Out / Tag Out
- LP – Low Pressure
- LPG – Liquefied Petroleum Gas
- LPH – Litres Per Hour
- LPWHH – Low Pressure Well Head Housing
- LRP – Lower Riser Package
- LSD – Land Surface Datum
- LSBGR – Long Spacing BHC GR Log
- LSSON – Long Spacing Sonic Log
- LT – Linear Time or Lag Time
- LTI(FR) – Lost Time Incident (Frequency Rate)
- LUMI – Luminescence Log
- LVEL – Linear Velocity Log
- LVOT – Linear Valve Override Tool
- LWD – Logging While Drilling
- LWOP – Logging Well on Paper
Read more about this topic: List Of Oil Field Acronyms