What this is:

LAD001, the gas half: S.LDF900GS, a 160-byte EBCDIC tape of the Commission's Historical Ledger database.

How it is laid out:

The Railroad Commission publishes this as EBCDIC (IBM cp037). IBM mainframe encoding (cp037). Opening it as text gives you nonsense; it has to be transcoded first. We decode it into a table you can open anywhere. It has 63 columns and about 219.4K rows.

The columns you will most likely want:

  • district RRC district as an INTERNAL district number, 01 to 14 -- not the designation the industry prints.
  • gas_rrc_id The well's RRC gas identifier as a whole number.
  • og_code The tape's record marker, 'G' for a gas well, on all 219,384 rows.
  • gas_oldest_eom_balance Cumulative gas overage, or underage where it is negative, as of the beginning of the oldest cycle on the LIVE database -- so this describes the live ledger at the tape cut, not 1993.
  • cond_oldest_eom_balance Condensate on hand at the end of the oldest live cycle, in barrels.
  • liquid_oldest_eom_balance The same for plant liquids, and only meaningful for wells in liquid-limit fields.

…and 57 more, all documented on the full page.

What we add:

Take a gas well's whole allowable-and-production history in one query -- 378 months for the wells that have been on the schedule since 1993 -- and put the reason beside the number: 5,530,195 well-months whose allowable was the word '14B2 EXT', 752,293 that read '14B DENY', 330,843 delinquent on the G-10.

There is more on the full page, including what this joins to.

  • Decoded out of the Commission's original format into something Excel opens.
  • Filterable before you download, so you can take one county instead of the whole state.
  • The Commission's single-letter codes translated into words.

Worth knowing before use:

THE DISTRICT IS THE INTERNAL NUMBER, 01-14, not the designation RRC prints: 08 here is District 7B, 10 is District 08, 11 is 8A, 13 is 09 and 14 is District 10. There is no 07 on the gas tape (6E is an oil-only district) and no 12 (8B is not used).

The full page lists every trap in this dataset.

Get it:

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