PURPOSE: The objective of exploration is to locate reserves of oil and gas. To obtain this objective, the geologic history and the relationships of petroleum generation, migration and accumulation must be understood. Analyses of well cuttings and cores provide much information on the composition, age and original environment of deposition of the sediments and on fluid content and characteristics. Logging tools lowered into boreholes furnish information concerning the electrical, acoustical and radioactive properties of rock-fluid systems throughout drilled intervals. This rule provides for filing of these data with the Oil and Gas Council for the future use of industry and government scientists and is of paramount importance in achieving new energy resources and for protection of the environment.

1. (1) Sample cuttings shall be taken at ten foot (10') intervals from the surface to total depth in all wells drilled for oil or gas, for geological information, for the storage of dry natural gas, or casinghead gas and for the development of reservoirs for the storage of liquid petroleum gas. Each sample shall be carefully identified as to well name and depth of sample and all samples shall be shipped at the owner’s expense to the office of the state geologist. Samples shall be remitted to the state geologist at weekly intervals and shall be for his/her study and use and shall be considered confidential for a period of one (1) year when so requested by the owner in writing.
2. (2) During the drilling of, or immediately following the completion of, any well drilled as provided in section 10 CSR 50-2.050(1) of this rule the owner shall advise the state geologist of all intervals that are to be cored, or have been cored, and the cores as are taken shall be preserved, and if requested shall be forwarded to the state geologist at the owner’s expense. In the event that it is necessary for the owner to utilize all or any portion of the core to the extent that sufficiently large and representative samples are not available for the state, the owner shall furnish the state geologist with the results of identification or testing procedures. The data shall be considered confidential for a period of one (1) year when so requested by the owner in writing.
3. (3) Within thirty (30) days of the completion of a well drilled for oil or gas, for geologic information, for gas storage, for the development of reservoirs for storage of liquid petroleum gas or for any injection purposes the owner will file with the state geologist properly executed form OGC-5. As an integral part of form OGC-5, the owner shall include complete logs or records of the well, including drilling time logs, electric logs, radioactive logs or other logs that may have been obtained during mechanical integrity testing. When more than one (1) type has been made, all shall be required. The data shall be filed with the state geologist for his/her study and use and shall be considered confidential for a period of one (1) year when so requested by the owner in writing.
4. (4) The state geologist may waive the requirements of sampling as set forth in section (1) of this rule when a well(s) is/are drilled in an established field. The state geologist will advise the owners on the returned copy of the drilling application when samples will not be required.

AUTHORITY: section 259.070, RSMo 1986.* Original rule filed Oct. 11, 1966, effective Oct. 21, 1966. Amended: Filed Sept. 12, 1973, effective Sept. 22, 1973. Amended: Filed Oct. 14, 1981, effective Feb. 11, 1982. *Original authority: 259.070, RSMo 1965, amended 1972.