
| Talisman Energy | Talon Development Co. |
| Tambeyneftgas PC. | Tammany Oil & Gas LLC. |
| Tana Oil and Gas Corp. | Tanganyika Oil Co. Ltd. |
| Taqa North Ltd. | Tara Energy Services Ltd. |
| Tarpon Offshore LP. | Tatham Offshore Inc. |
| Tauber Exploration & Production | Tauren Exploration Inc. |
| Taurus Petroleum Inc. | Taylor Energy Co. |
| TDC Energy | Tebukneft |
| Tecnova SA. | Teco Energy Inc. |
| Tejas Energy LLC. | Tejas Gas Corp. |
| Tejas Gas Storage Co. | Tejas Power Corp. |
| Tellus Energy Group LLC. | Tema Oil and Gas Co. |
| Tengasco Inc. | Tenneco Gas |
| Tennessee Energy Acquisition Corp. | Tepco Inc. |
| Termotasajero | Terra Energy Ltd. |
| Terralliance Oil & Gas | Teton Petroleum Co. |
| Texaco Inc. | Texakota Oil Co. |
| Texas American Resources Co. | Texas Bar Cle |
| Texas Commerce Bank NA. | Texas Crude Energy Inc. |
| Texas Eastern Transmission Corp. | Texas Fuel Co. |
| Texas Gas Partners LP. | Texas Gulf Resources Corp. |
| Texas Meridian Resources Corp. | Texas Onshore Energy Inc. |
| Texas Pacific Group | Texas Petroleum Invetment Co. |
| Texas Standard Oil Co. | Texiana Gas Ltd. |
| Texneft Inc. | Texoil Co. |
| Texona Acquisition Co. | Texstar |
| Texstar North America Inc. | Texstar Petroleum LLC. |
| Textron Investment Management Co. Inc. | The Amdrill Co. |
| The Anschutz Corp. | The Anz Investment Bank |
| The Bahrain Petroleum Co. | The Bank of Cherry Creek |
| The Beacon Group | The Calypso Corp. |
| The Cullen Foundation | The Cymri Corp. |
| The Energy Group | The Farm Credit Bank of Columbia |
| The Hamill Co. | The Hillman Co. |
| The Hise Co. | The Kingston Co. |
| The Limited Liability Co. | The Lucky Number |
| The Mercer Group | The National Gas Co. of Trinidad & Tobago |
| The Offshore Group | The Royal Bank of Scotland |
| The Sakura Bank Ltd. | The Southern Co. |
| The Termo Co. | The Terry Cos. |
| The Vagas Group | The William G. Helis Co. |
| The Wiser Oil Co. | Theisen Co. |
| Thermo Cogeneration Partnership | Thetford Associates Inc. |
| Thompson/Cross Royalty Interest | Thrace Basin Natural Gas Turkey |
| Threshold Development Co. | Thums Long Beach |
| Thunder Road Resources | Tiger Petroleum |
| Titan Exploration Inc. | Titan Offshore Energy Development |
| TKM Resources LLC. | TMC Oil & Gas |
| Toco LLC. | TOEI 96 Ltd. |
| Tom Brown Inc. | Tom Brown Resources Ltd. |
| Torch Energy Advisors Inc. | Toronto Dominion Bank |
| Torpedo Petroleum Corp. | Total E&P USA Inc. |
| Tower Colombia Corp. | Towers Energy |
| Tpex Exploration Inc. | Tracer Petroleum |
| Trade and Development Corp. | Tradewinds Oil and Gas Inc. |
| Trafina Energy Ltd. | Trans Tex Resources |
| Transandean Partners Inc. | TransAtlantic Petroleum Corp. |
| TransFuel Operating Co. | TransMeridian Exploration Inc. |
| TransOK LLC. | TransPecto Transport Co. |
| TransTex Resources | TransWestern Pipeline |
| TransWorld Exploration and Production | Traveler's Exploration Co. |
| Travelers Oil Co. | Trax Petroleum Ltd. |
| TRC operating Co. | Trendwell Energy Corp. |
| Tri-C Resouces Inc. | Tri-Union Development Corp. |
| Triad Energy Corp. | Triad Resources Inc. |
| Triana Energy | Triangle Oil & Gas Inc. |
| TRIANGLE Petroleum Corp. | Tribo Petroleum Corp. |
| TRIDENT EXPLORATION Corp. | Trinity Offshore Corp. |
| Tripetrol Ecuador Inc. | Triple 8 Energy Ltd. |
| Tristan Oil Ltd. | Tristream Energy LLC. |
| Trust Company of the West | Tuskar Colombia Ltd. |
| Tyumen Oil Co. |
Historical List of Ryder Scott Clients