What drilling and operational records must I maintain for each well?

You must keep the following information for each well, and make it available for BLM to inspect, upon request: (a) A complete and accurate drilling log, in chronological order; (b) All other logs; (c) Water or steam analyses; (d) Hydrologic or heat flow tests; (e) Directional surveys; (f) A complete log of all subsequent well operations, such as cementing, perforating, acidizing, and well cleanouts; and (g) Any other information regarding the well that could affect its status.