A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| TAPLI | Tape Listing |
| TAPVE | Tape Verification |
| TD | Target Depth |
| TP | Tarpon Springs Gulf of Mexico leasing area |
| TFM | TaskForceMajella Research Project |
| TDTCP | TDT CPI Log |
| TDT GR | TDT Gamma Ray Casing Collar Locator Log |
| TDT | TDT Log |
| TLOG | Technical Log |
| THERP | Technique for human error rate prediction |
| TAML | Technology Advancement for Multilaterals |
| TELER | Teledrift Report |
| TEMP | Temperature Log |
| TSE | Temperature safety element |
| TSH | Temperature safety high (sensor) |
| TA | Temporarily Abandoned well |
| TSI | Temporarily Shut In |
| TCF | Temporary Construction Facilities |
| TGB | Temporary Guide Base |
| TR | Temporary refuge |
| TBM | Tendon buoyancy module |
| TCO | Tengizchevroil |
| TLP | Tension leg platform |
| TJ | Terajoule |
| TREP | Test Report |
| PR2 | Testing regime to API6A Annex F |
| TX | Texas |
| TABS | Texas Automated Buoy System |
| TIW | Texas Iron Works (valve) |
| EL | The Elbow Gulf of Mexico leasing area |
| MMS-131 | The former name of the BSEE-0131 form, which must be submitted annually |
| Henry Hub | The Henry hub is the pricing point for natural gas futures contracts traded on NYMEX. It is a point on the natural gas pipeline system in Erath, Louisiana. |
| Sweetening | The removal of hydrogen sulfide from gases |
| GPRA | The US Government Performance and Results Act |
| TCU | Thermal Combustion Unit |
| TEG | Thermal Electric Generator |
| TNDT | Thermal Neutron Decay Time |
| TNDTG | Thermal Neutron Decay Time/Gamma Ray Log |
| TAGOGR | Thermally Assisted Gas/Oil Gravity Drainage |
| TSA | Thermally Sprayed Aluminium |
| THERM | Thermometer Log |
| TPI | Third-party inspector |
| Mbd | thousand barrels (of oil) per day |
| Mboe | thousand barrels of oil equivalent |
| Mboed | thousand barrels of oil equivalent per day |
| Mbod | thousand barrels of oil per day |
| Mbpd | thousand barrels of oil per day |
| Mcf | thousand cubic feet of natural gas |
| Mcfe | thousand cubic feet of natural gas equivalent |
| kpsi | Thousand pounds per square inch |
| Mscf | Thousand standard cubic feet |
| TPI | Threads per inch |
| 3C | Three-component (seismic survey) |
| 3D | Three-dimensional |
| TLV | Threshold limit value |
| TBT | Through Bore Tree |
| TFL | Through Flow Line |
| TTRD | Through Tubing Rotary Drilling |
| TTP | Through-tubing perforating |
| TIE | Tie In Log |
| TIEBK | Tieback Report |
| TS | Tiger Shoal Gulf of Mexico leasing area |
| t | Time |
| TVELD | Time and Velocity to Depth |
| TOFD | Time of first data sample (on seismic trace) |
| TOFS | Time of first surface sample (on seismic trace) |
| 4D seismic | Time-lapse seismic survey |
| TWA | Time-weighted average |
| THAI | Toe-to-heel air injection (method) |
| TPERF | Tool Performance |
| TA | Top Assembly |
| TDS | Top Drive System |
| TOC | Top of cement |
| TOL | Top Of Liner |
| TLI | Top of Logging Interval |
| TRA | Top Riser Assembly |
| TUTB | Topside Umbilical Termination Box |
| TUTA | Topsides umbilical termination assembly |
| TORAN | Torque and Drag Analysis |
| TT | Torque Tool |
| TAN | Total Acid Number |
| TCA | Total Corrosion Allowance |
| TCO | Total cost of ownership |
| TD | Total Depth (depth of the end of the well; also a verb, to reach the final depth, used as an acronym in this case) |
| TDD | Total Depth (Driller) |
| TDL | Total Depth (Logger) |
| TDS | Total Dissolved Solids |
| TDH | Total dynamic head |
| TGOR | Total Gas Oil Ratio (GOR uncorrected for gas lift gas present in the production fluid) |
| TMD | Total measured depth |
| TOC | Total Organic Content/Carbon |
| TQM | Total Quality Management |
| TRCFR | Total Recordable Case Frequency Rate |
| TRIR | Total recordable incident rate |
| TRD | Total Report Data |
| TFE | TotalFinaElf (obsolete; Now Total S.A.) major French multinational oil company |
| TEFC | Totally Enclosed Fan Cooled |
| TEMPSC | Totally enclosed motor-propelled survival craft |
| TDM | Touch Down Monitoring |
| TDP | Touch Down Point |
| Tfx | Toxic effects |
| TRA | Tracer Log |
| TUM | Tracked Umbilical Machine |
| TRACL | Tractor Log |
| bbl | Traditional oilfield abbreviation for barrels of oil (42 galUS) |
| TQ | Training qualifications |
| TAPS | Trans-Alaska Pipeline System (also called Alyeska Pipeline) |
| TT | Transit Time Log |
| TZ | Transition zone |
| TSI | Transportation security incidents |
| TMCM | Tranverse Mercator Central Meridian |
| TT | Travel time |
| TREAT | Treatment Report |
| TRT | Tree Running Tool |
| TEG | Tri-Ethylene Glycol |
| Tcf | Trillion cubic feet |
| TCF | Trillion Cubic Feet(of gas) |
| TRIP | Trip Condition Log |
| TIH | Trip Into Hole |
| TOH | Trip Out of Hole |
| TOOH | Trip Out Of Hole |
| TAR | True Amplitude Recovery |
| TVD | True vertical depth |
| TVBDF | True Vertical Depth Below Derrick Floor |
| TVDPB | True Vertical Depth Playback Log |
| TVDSS | True vertical depth subsea |
| TVRF | True Vertical Depth versus Repeat Formation Tester |
| TAC | Tubing Anchor |
| TH | Tubing Hanger |
| THP | Tubing Hanger Pressure (pressure in the production tubing as measured at the tubing hanger) |
| THRRT | Tubing hanger running and retrieval tool |
| THRT | Tubing Hanger Running Tool |
| TB | Tubing Puncher Log |
| TRSV | Tubing Retrievable Safety Valve |
| TRSCSSSV | Tubing Retrievable Surface Controlled Sub-Surface Safety Valve |
| TRSCSSV | Tubing Retrievable Surface Controlled Sub-Surface Valve |
| TCP | Tubing-conveyed perforating |
| TCPD | Tubing-Conveyed Perforating Depth |
| TCI | Tunsgten Carbide Insert (a type of rollercone drillbit) |
| WAV4 | Two Way Travel Time (in Seismics) |
| 2D | Two-dimensional |
| TWT | Two-Way Time (seismic) |
| TWTT | Two-way travel Time |
| TWTTL | Two-Way Travel Time Log |