Section 20 AAC 25.071 - Logs and geologic data(a) An operator shall log the well from total depth to the base of conductor pipe by either a complete electrical or gamma-ray log unless the commission specifies the type of each log to be run.(b) Not later than 90 days after completion, suspension, or plugging of a well or well branch, or not later than 90 days after the date of acquisition of the data, whichever occurs first, the operator shall file with the commission, unless previously filed, (1) an electronic image file in formats acceptable to the commission of a complete mud log or a lithology log consisting of a detailed record and description of the sequence of strata encountered, including the kind and character of the rock and all shows of hydrocarbons;(2) a complete set of washed and dried, legibly identified samples of all drill cuttings, as caught by the operator in accordance with good geological practices, consisting of a minimum of one-quarter cup in volume or three ounces in weight of cuttings for each sample interval;(3) a lithologic description and, if available, photographs of each conventional and sidewall core; conventional core descriptions must include apparent textural, fluid, and lithologic variations, including rock type, porosity, fractures, bedding plane attitudes, sedimentary structure, grain size, and presence of hydrocarbons;(4) chips from each foot of recovered conventional core, except that chips need not be submitted until 30 days after the conventional core is analyzed; the chips must be representative of the one-foot interval, and must be approximately either one cubic inch in volume, or two ounces in weight;(5) a list of the geologic markers and each formation top encountered and the measured and true vertical depths of each marker and formation top;(6) an electronic image file in formats acceptable to the commission of all open-hole logs and mud logs run, including common derivative formats such as tadpole plots of dipmeter data and borehole images produced from sonic or resistivity data, and including composite log formats; however, copies of velocity surveys and experimental logs need not be included; the operator shall provide the commission the opportunity to examine open-hole logs for exploration or stratigraphic test wells not later than 72 hours after the logs are run and before abandonment;(7) digital data and a verification listing for all open-hole logs, all mud logs, and all cased-hole formation evaluation and cement evaluation logs run, except velocity surveys and experimental logs; the logs shall be stored on electronic media and use file formats that are acceptable to the commission;(8) the following items, or a written request proposing a date for submitting those items, subject to commission approval of that date for timeliness, if those items are unavailable within the 90-day filing period set out in this subsection:(A) copies of all drill stem tests and production test data and charts;(B) a brief summary of production tests, drill stem tests, wireline formation tests, and other formation tests performed, including test date, time, depth, duration, method of operation, recovered fluid types, fluid amounts, gas-oil ratio, oil gravity, pressure, and choke size;(C) conventional and sidewall core analysis determinations, if any, of porosity, permeability, and fluid saturation;(D) geochemical and formation fluid analyses obtained, if any; and(9) an electronic image file in formats acceptable to the commission of all cased-hole formation evaluation logs and cement evaluation logs run, including common derivative formats.(c) The commission may waive or modify the requirements of this section for a well if those requirements would not significantly add to the geologic or engineering knowledge of the area in light of the information that is available from the well or other wells in the area.(d) In this section, (1) "experimental logs" means logs that are not commercially available from a well logging contractor;(2) "velocity survey" means a survey, a purpose of which is to determine velocity of seismic waves through formations penetrated by a well by measuring travel times of seismic pulses from or near the surface to geophones placed at various depths in the well.Eff. 4/2/86, Register 97; am 11/7/99, Register 152; am 2/10/2018, Register 225, April 2018Authority:AS 31.05.030
AS 31.05.035