The Director shall hold confidential all logs, surveys, and reports relating to the drilling, completion, and testing of a well that are filed by a gas or oil operator under this chapter for a period of 90 days after the completion of the well or 18 months after the total depth of the well has been reached, whichever occurs first. Upon receipt of a gas, oil, or geophysical operator’s written request, the Director shall hold confidential such information concerning an exploratory well or corehole for a period of two years after completion of the well or four years from the date such well or hole reaches total depth, whichever occurs first. The Director, for good cause shown by the gas, oil, or geophysical operator, may annually extend the period of time for which information regarding exploratory drilling is held confidential. However, the Director shall upon request provide a copy of any survey or log for strata through the lowest coal seam to the coal owner.