Alaska Administrative Code › Title 20 - Miscellaneous Boards and Commissions › Chapter 25 - Alaska Oil and Gas Conservation Commission › Article 1 - Drilling › 20 AAC 25.071 - Logs and geologic data

Current through May 31, 2024
(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.