0 Subcommittee On Recommended Format For Digital Well Data, Basic Schema 0 1 Operator 0 2 Driller 0 3 Mud Logger 0 9 Amerada Hess http://www.hess.com 0 10 Analysts, The 0 15 Baker Hughes Inteq 1 20 Baroid 0 30 Birdwell 0 40 Reeves (1 Jan 99; formerly BPB) http://www.reeves-wireline.com 0 50 Brett Exploration 0 60 Cardinal 0 65 Center Line Data 0 66 Subcommittee On Recommended Format 0 70 Century Geophysical 0 77 CGG Logging, Massey France 0 80 Charlene Well Surveying 0 90 Compagnie de Services Numerique 0 95 Comprobe 0 100 Computer Data Processors 0 110 Computrex 0 115 COPGO Wood Group 0 120 Core Laboratories 0 125 CRC Wireline, Inc. 0 126 Crocker Data Processing Pty Ltd http://www.crockerdata.com.au 0 127 Davis Great Guns Logging, Wichita, KS. 0 130 Digigraph 0 137 Digital Logging Inc., Tulsa, OK. 0 140 Digitech 0 145 Deines Perforating 0 148 Drillog Petro-Dynamics Limited http://www.drillogpdl.com/ 0 150 Baker Atlas (formerly Dresser Atlas) 1 160 Earthworm Drilling 0 170 Electronic Logging Company 0 180 Elgen 0 190 El Toro 0 200 Empire 0 205 Encom Technology, Ltd. 0 206 Ensigh Geophysics, Ltd. 0 210 Frontier 0 215 Geolog 0 217 Geoshare http://www.geoshare.org 0 218 GEO·X Systems Ltd. 0 220 G O International 0 230 Gravilog 0 240 Great Guns Servicing 0 250 Great Lakes Petroleum Services 0 260 GTS 0 268 Guardian Data Seismic Pty. Ltd. 0 270 Guns 0 280 Halliburton Logging 1 285 Horizon Production Logging 0 290 Husky 0 300 Jetwell 0 305 Landmark Graphics http://www.lgc.com/ 0 310 Lane Wells 0 315 Logicom Computer Services (UK) Ltd http://www.luk.net 0 320 Magnolia 0 330 McCullough Tool 0 332 Mitchell Energy Corporation 0 335 Paradigm Geophysical (formerly Mincom Pty Ltd) 0 337 MR-DPTS Limited 0 338 NRI On-Line Inc 0 339 Oilware, Inc. 0 340 Pan Geo Atlas 0 342 Pathfinder Energy Services http://www.pathfinderlwd.com 0 345 Perfco 0 350 Perfojet Services 0 360 Perforating Guns of Canada 0 361 Petcom, Inc. http://www.petcominc.com 0 362 Petroleum Exploration Computer Consultants, Ltd. 0 363 Petrologic Limited 0 366 Phillips Petroleum Company 0 370 Petroleum Information 0 380 Petrophysics 0 390 Pioneer 0 392 The Practical Well Log Standards Group http://www.posc.org/workprgm/wellloggingProj.html 0 395 IHS Energy Log Services (formerly Q. C. Data Collectors) http://www.IHSLogNet.com 0 400 Ram Guns 0 410 Riley's Datashare 0 418 RODE 0 420 Roke 0 430 Sand Surveys 0 440 Schlumberger 1 450 Scientific Software 0 460 Seismograph Service 0 462 SEGDEF 0 463 SEG Technical Standards High Density Media Format Subcommittee 0 464 Shell Services Company 0 465 Stratigraphic Systems, Inc. 0 467 Sperry-Sun Drilling Services 0 468 SEPTCO 0 469 Sercel, Inc. 0 470 Triangle 0 480 Welex 0 490 Well Reconnaissance 0 495 Wellsite Information Transfer Specification (WITS) 0 500 Well Surveys 0 510 Western 0 520 Westronics 0 525 Winters Wireline 0 530 Wireline Electronics 0 540 Worth Well 0 560 Z & S Consultants Limited 0 999 *** Reserved for local schemas *** 0 1000 POSC http://www.posc.org 1