Exhibit 99.1

PRELIMINARY COPY SUBJECT TO COMPLETION

             PDC ENERGY, INC.         C/O BROADRIDGE CORPORATE ISSUER SOLUTIONS, INC.         P O BOX 1342         BRENTWOOD, NY 11717        VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above   Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. Eastern Time on [TBD]. Have your proxy card in hand when you access the website and follow the instructions to obtain your records and to create an electronic voting instruction form.   During The Meeting - Go to www.virtualshareholdermeeting.com/PDCE2023SM   You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions.   VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 P.M. Eastern Time on [TBD]. Have your proxy card in hand when you call and then follow the instructions.   VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:

V19783-TBD                                     KEEP THIS PORTION FOR YOUR RECORDS    

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DETACH AND RETURN THIS PORTION ONLY    

THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

PDC ENERGY, INC.
	The Board of Directors recommends you vote FOR proposals 1 through 3.	For	Against	Abstain
	1.  To adopt the Agreement and Plan of Merger, dated as of May 21, 2023 (as may be amended from time to time, the “merger agreement”), by and among Chevron Corporation, Bronco Merger Sub Inc. and PDC Energy, Inc. (“PDC”).	☐	☐	☐
	2.  To approve, on an advisory (non-binding) basis, the compensation that may be paid or become payable to PDC’s named executive officers that is based on or otherwise related to the merger.	☐	☐	☐
	3.  To approve the adjournment of the special meeting, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes to adopt the merger agreement.	☐	☐	☐
	NOTE: To transact any other business that may properly come before the meeting and at any and all adjournments or postponements thereof.

Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.

Signature [PLEASE SIGN WITHIN BOX] Date             Signature (Joint Owners) Date            

PRELIMINARY COPY SUBJECT TO COMPLETION

Important Notice Regarding the Availability of Proxy Materials for the Special Meeting:

The Notice and Proxy Statement is available at www.proxyvote.com.

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V19784-TBD    

PDC ENERGY, INC.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

SPECIAL MEETING OF STOCKHOLDERS

The stockholder(s) hereby appoint(s) Barton R. Brookman, R. Scott Meyers and Nicole L. Martinet, or any of them, as proxies, each with the power to appoint his or her substitute, and hereby authorize(s) him or her to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of PDC ENERGY, INC. that the stockholder(s) is/are entitled to vote at the Virtual Special Meeting of Stockholders to be held at [TBD], MDT on [TBD], at www.virtualshareholdermeeting.com/PDCE2023SM, and any adjournment or postponement thereof.

THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED AS DIRECTED BY THE UNDERSIGNED. IF NO SUCH DIRECTIONS ARE MADE, THIS PROXY WILL BE VOTED “FOR” EACH OF THE PROPOSALS AS RECOMMENDED BY THE BOARD OF DIRECTORS. BY EXECUTING THIS PROXY, THE UNDERSIGNED STOCKHOLDER(S) AUTHORIZE(S) THE PROXIES TO VOTE IN THEIR DISCRETION ON ANY OTHER MATTERS AS MAY PROPERLY COME BEFORE THE SPECIAL MEETING AND ANY ADJOURNMENT OR POSTPONEMENT THEREOF.

PLEASE MARK, SIGN, DATE AND RETURN THE PROXY CARD PROMPTLY USING THE ENCLOSED REPLY ENVELOPE.

Continued and to be signed on reverse side