| Business | Phone |
| Intrex Data Svc 11152 Westheimer Rd, Houston 77042 | (832) 243-0400 |
| Sidney Schafer & Co 2200 Welch St, Houston 77019 | (713) 529-8789 |
| Western Geophysical 10310 Harwin Dr, Houston 77036 | (713) 781-4500 |
| Pgs Data Management Geo 10550 Richmond Ave, Houston 77042 | (713) 780-7818 |
| Quantum Geophysical Inc 1 Riverway 2100, Houston 77056 | (713) 850-9799 |
| Viking Intl Petroleum Llc 770 S Post Oak Ln, Houston 77056 | (713) 840-8480 |
| Staag Imaging 650 N Sam Houston Pkwy E, Houston 77060 | (832) 327-8224 |
| Seis Scan Geodata 2500 Tanglewilde St 277, Houston 77063 | (713) 782-1730 |
| Rock Solid Images 2600 S Gessner Rd 650, Houston 77063 | (713) 783-5593 |
| Reservoir Definition Inc 12000 Westheimer Rd 320, Houston 77077 | (281) 493-2255 |
| Lct Houston Inc 1155 Dairy Ashford St, Houston 77079 | (281) 558-8383 |
| John Green 9413 Crispin Ln, Houston 77080 | (713) 465-2115 |
| Photo Gravity Corp 10615 Shadow Wood Dr A, Houston 77043 | (713) 827-8812 |
| Veritas Dgc Land 10795 Rockley Rd, Houston 77099 | (281) 988-1000 |
| Petrophysics Inc 9219 Katy Fwy, Houston 77024 | (713) 468-2333 |
| Transylvania Geo Physical Corp 820 Gessner Rd 1455, Houston 77024 | (713) 722-8010 |
| Texseis Inc 10810 Old Katy Rd 201, Houston 77043 | (713) 465-3181 |
| Petro-Ventures International 525 N Sam Houston Pkwy E 418, Houston 77060 | (281) 591-6931 |
| Aoa Geophysics Inc 2500 Tanglewilde St 120, Houston 77063 | (713) 273-8320 |
| Premier Geophysical Svc 14515 Briarhills Pkwy 210, Houston 77077 | (281) 558-5770 |
| Pgs Diamond Geophysical 738 Highway 6 S 300, Houston 77079 | (281) 589-6725 |
| Spectrum Energy & Info Tech 16225 Park Ten Pl 300, Houston 77084 | (281) 647-0602 |
| Velocity Data Bank Inc 1304 Langham Creek Dr 498, Houston 77084 | (281) 578-6397 |
| W C Swart 17150 Butte Creek Rd, Houston 77090 | (281) 583-0120 |
| Tensor Geophysical Inc 10003 Leawood Blvd, Houston 77099 | (281) 564-2888 |