California Code of Regulations
Title 14 - Natural Resources
Division 2 - Department of Conservation
Chapter 4 - Development, Regulation, and Conservation of Oil and Gas Resources
Subchapter 4 - State-Wide Geothermal Regulations
Article 3 - Drilling
Section 1937.1 - Records Required to be Filed with the Division

(a) Drilling Log and Core Record. The drilling log shall show the lithologic characteristics and depths of formations encountered, the depths and temperatures of water-bearing and steam-bearing strata, the temperatures, chemical compositions, and other chemical and physical characteristics of fluids encountered from time to time, so far as ascertained.

The core record shall show the depth, lithologic character and fluid content of cores obtained, so far as determined.

(b) Well History. The history shall describe in detail in chronological order on a daily basis all significant operations carried out and equipment used during all phases of drilling, testing, completion, recompletion and plugging and abandonment of the well.

(c) Well Summary Report. The well summary report shall accompany the core record and well history reports. It is designed to show data pertinent to the condition of a well at the time of completion of work done.

(d) Production Records. Monthly production records shall be filed with the Division on or before the 30th day of each month, for the last preceding calendar month.

(e) Injection Records. Monthly injection records shall be filed with the Division on or before the 30th day of each month, for the last preceding calendar month.

(f) Other Records. The following shall also be filed with the Division, if run: electric logs, physical or chemical logs, tests, water analyses, and surveys (including temperature surveys and directional surveys).