UNITED STATES DEPARTMENT OF THE INTERIOR
MINERALS MANAGEMENT SERVICE
PACIFIC OCS REGION

NOTICE TO LESSEES AND OPERATORS OF
FEDERAL OIL AND GAS LEASES
IN THE PACIFIC OUTER CONTINENTAL SHELF REGION

Submission of Digitized Well Log Data on Magnetic Tape

This NTL supersedes NTL 88-09.

The operating regulations provide in 30 CFR 250.416(c) that "Upon request by Regional or District Supervisor, the lessee shall furnish the following: (1) copies of the records of any of the well operations specified in paragraph (a) of this section; . . ." Paragraph (f) of 30 CFR 250.416 provides further that " . . . lessee shall submit any other reports and records of operations . . . in the manner and form prescribed by the Regional or District Supervisor."

Lessees (you) must provide to the appropriate District Supervisor, Camarillo or Santa Maria, Pacific OCS Region, a single digital copy of the final measured-depth composited logs obtained in the well (both wireline and logging-while-drilling) for the purpose of formation evaluation (i.e., determination of lithology, porosity, fluid type, saturation, producibility, and permeability). You must submit the data, within 30 days of completion of drilling and at no cost to the Government. These include at a minimum the following logging-tool types:

Open-hole - resistivity (induction and electrode devices), gamma ray (both natural and spectral), SP, dielectric, nuclear porosity, acoustic, NMR, borehole imaging, borehole gravity, dipmeter, mudlog, wireline formation testers.

Cased-hole - acoustic, density, gamma ray, neutron porosity and pulsed neutron, e.g., thermal decay, thermal capture, and inelastic (Carbon/Oxygen), devices.

You must submit digital well-log data for all wells in LAS (version 2.0 or greater) or RP66 (DLIS) (version 2.0 or greater) formats in depth-composited archival or library formats that at a minimum include all "optical" curves provided on the paper log presentations.

You should submit digital data in both measured depth (MD) and true vertical depth (TVD), and include, at a minimum, the following information:

Full header information (well name, location, API number).

Information for each and all tool runs (including borehole fluid, i.e., mud, and casing information, depth interval, mud and filtrate resistivity and temperatures, bottom-hole or maximum recorded temperature).

Logging tool parameters (matrix values), position of logging tool (i.e., centered or eccentered).

Logging engineer's comments.

Maintain tool-specific and service provider-specific curve and parameter mnemonics (names and abbreviations) as originally acquired. Provide separate digital files from each service provider.

We will accept either PC formatted 3 ½ inch diskettes, CD-ROM's, or tapes. Tapes are to be in either DAT (4 mm), 8 mm, or DLT format.

Paperwork Reduction Act of 1995 Statement: The collection of information referred to in this notice provides clarification, description, or interpretation of requirements in 30 CFR 250, subpart D. The Office of Management and Budget (OMB) approved the information collection requirement in these regulations and assigned OMB control number 1010-0053. This notice does not impose additional information collection requirements subject of the Paperwork Reduction Act of 1995.

If you have any questions on this NTL, please contact the Office of Resource Evaluation at (805) 389-7000.

Web Master: Nollie Gildow-Owens
Page content last updated 09/20/2006
Page last published 09/20/2006