| Unknown |
| APD - Approved Permit |
| DRL - Spudded (Drilling Commenced) |
| GIW - Gas Injection Well |
| GSW - Gas Storage Well |
| LA - Location Abandoned |
| LOC - New Location |
| OPS - Drilling Operations Suspended |
| PA - Plugged Abandoned |
| PGW - Producing Gas Well |
| POW - Producing Oil Well |
| RET - Returned Approved Permit |
| SGW - Shut-in Gas Well |
| SOW - Shut-in Oil Well |
| TA - Temporarily Abandoned |
| TW - Test Well |
| WDW - Water Disposal Well |
| WIW - Water Injection Well |
| WSW - Water Supply Well |