<PAGE>
EXHIBIT 24.1
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints J. Larry Nichols, H. Allen Turner and
Marian J. Moon, and each or any one of them, his true and lawful
attorney-in-fact and agent, each acting alone, with full powers of substitution
and re-substitution, for him and in his name, place, and stead, in any and all
capacities, to sign any or all amendments (including post-effective amendments)
and supplements to this Registration Statement, and to file the same, with all
exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorney-in-fact and
agents, each acting alone, full power and authority to do and perform each and
every act and thing requisite or necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that said attorneys-in-fact and agents, each acting
alone or his substitute or substitutes, may lawfully do or cause to be done by
virtue hereof.
Dated this 14th day of June, 2000.
<TABLE>
<CAPTION>
SIGNATURE TITLE
--------- -----
<S> <C>
/s/ James L. Pate Chairman of the Board and Director
------------------------------
James L. Pate
/s/ J. Larry Nichols President, Chief Executive Officer and Director
------------------------------
J. Larry Nichols
/s/ William T. Vaughn Senior Vice President - Finance
------------------------------
William T. Vaughn
/s/ Danny J. Heatly Vice President - Accounting
------------------------------
Danny J. Heatly
/s/ Thomas F. Ferguson Director
------------------------------
Thomas F. Ferguson
/s/ David M. Gavrin Director
------------------------------
David M. Gavrin
/s/ Michael E. Gellert Director
------------------------------
Michael E. Gellert
/s/ Moulton Goodrum, Jr. Director
------------------------------
Moulton Goodrum, Jr.
/s/ John A. Hagg Director
------------------------------
John A. Hagg
/s/ Henry R. Hamman Director
------------------------------
Henry R. Hamman
/s/ William J. Johnson Director
------------------------------
William J. Johnson
/s/ Michael M. Kanovsky Director
------------------------------
Michael M. Kanovsky
<PAGE>
/s/ Robert Mosbacher, Jr. Director
------------------------------
Robert Mosbacher, Jr.
/s/ H. R. Sanders, Jr. Director
------------------------------
H.R. Sanders, Jr.
/s/ Brent Scowcroft Director
------------------------------
Brent Scowcroft
/s/ Robert B. Weaver Director
------------------------------
Robert B. Weaver
</TABLE>
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