Directory Of Oil Company Name Changes. Digital Download

This publication is a cross-referenced list of oil and gas exploration and production companies that have
sold major assets or have changed their names due to a merger, acquisition or reorganization. The
purpose of this directory is to assist geologists in tracking down electric logs, paleo data, DST/well tests,
production histories and other well data, that may have been obscured by name changes.
The list is in ALPHABETICAL order irrespective of punctuation. There are two kinds of entries. Entries
printed in "UPPER-CASE" bold type are for "Successor'' companies presently operating. Entries printed
with "lower-case", not balded type, are for the "Predecessor" companies that are extinct or have had
major asset sales. Each company, whether successor or predecessor is listed in alphabetical order with
the next, indented line(s) showing the related company(s). Companies that are person's names should
be listed by last name (i.e. : Jay or J. Smith Petroleum should be found under the "S" listings). Please
note that many predecessor companies have continued to operate after an asset sale. A predecessor
entry followed by a date shows when that company ceased to operate or assets were sold. An asterisk
(*) following a company name indicates a property/asset sale rather than a merger or reorganization.
Also note that a company or property may have passed through multiple hands before its current
owner. The geographic location of a major property sale may be included in brackets (i.e. - Permian, GC,
Mid Con, Rkys).

There has been no attempt to track the numerous name changes, mergers and asset sales that are
common in the Canadian oil industry. Regulations in Canada are stringent and provide for public release
of well information and therefore seeking "Predecessor'' energy companies for their well data is not an
issue. Similarly, Gulf of Mexico asset sales are generally not tracked. Tracking the non-operators
(particularly in the numerous Joint Ventures that are pursuing resource plays) is also not included. The
intent of the Directory is to lay out a possible roadmap where one could follow the change in the
operators of the wells. This could potentially lead one to the location of the original well files and well
data.

Included at the end of the Directory is an alphabetical list of acronyms and abbreviations used for
operating groups, individual companies and asset locations. Some abbreviations, such as Texaco, have
become the legal name and are included for historical value.
Every attempt was made to make this directory as accurate as possible, but no warranty of accuracy or
completeness is intended or implied by the Houston Geological Society.