As filed with the Securities and Exchange Commission on September 19, 2002

                                                      Registration No. 333-67814
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                ---------------

                         POST-EFFECTIVE AMENDMENT NO. 4
                                       TO
                                    FORM S-1
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                                ---------------


                           CANARGO ENERGY CORPORATION
             (Exact name of registrant as specified in its charter)


                                                              
             DELAWARE                           1311                          91-0881481
(State or other jurisdiction of     (Primary Standard Industrial    (I.R.S. Employer Identification
         organization)               Classification Code Number)     incorporation or organization)


                        C/O CANARGO SERVICES (UK) LIMITED
              150 BUCKINGHAM PALACE ROAD, LONDON, ENGLAND SWIW 9TR
                                (44) 207 808-4700

   (Address, including zip code, and telephone number, including area code, of
                    registrant's principal executive offices)

                                 ---------------

                                 JEFFREY WILKINS
                          CANARGO SERVICES (UK) LIMITED
              150 BUCKINGHAM PALACE ROAD, LONDON, ENGLAND SWIW 9TR
                                (44) 207 808-4700
  (Name, address, including zip code, and telephone number, including area code
                              of agent for service)

                                 ---------------

                 Please forward a copy of all correspondence to:
                               PETER A. BASILEVSKY
                      SATTERLEE STEPHENS BURKE & BURKE LLP
                           230 PARK AVENUE, 11TH FLOOR
                               NEW YORK, NY 10169
                              PHONE: (212) 818-9200

Approximate date of commencement of proposed sale to the public: FROM TIME TO
TIME AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.


         If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

         If any of the securities being registered on this form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, check the following box. [ ]

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

         If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. [ ]

         If delivery of the prospectus is expected to be made pursuant to
Rule 434, please check the following box. [ ]

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                          DEREGISTRATION OF SECURITIES

This Post-Effective Amendment No. 4 to the Registration Statement on Form S-1
(Reg. No. 333-67814) filed with the Securities and Exchange Commission (the
"SEC") on August 17, 2001 (the "Original Form S-1") by CanArgo Energy
Corporation, a Delaware corporation (the "Company"), is being filed to amend
Post-Effective Amendment No. 3 to the Original Form S-1 filed with the SEC on
September 17, 2002 to deregister all remaining unsold securities previously
registered by the Company under the Securities Act of 1933, as amended, on the
Original Form S-1, as amended.






                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has
duly caused this registration statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in London, England on September 19,
2002.


                                             CANARGO ENERGY CORPORATION


                                             By: /s/ David Robson
                                                 -------------------------------
                                                 David Robson
                                                 Chief Executive Officer


Pursuant to the requirements of the Securities Act of 1933, this registration
statement has been signed below by the following persons on behalf of the
registrant and in the capacities and on the dates indicated.



                                                      
By:   /s/Vincent McDonnell
      --------------------------------------------------
      Vincent McDonnell, Chief Financial Officer
      Principal Financial and Accounting Officer            Date: September 19, 2002



By:   /s/Roger Brittain*                                    Date: September 19, 2002
      --------------------------------------------------
      Chairman of the Board


By:   /s/David Robson                                       Date: September 19, 2002
      --------------------------------------------------
      David Robson, Chief Executive Officer and Director
      Principal Executive Officer


By:   /s/Russell Hammond*                                   Date: September 19, 2002
      --------------------------------------------------
      Russell Hammond, Director


By:   /s/Nils N. Trulsvik*                                  Date: September 19, 2002
      --------------------------------------------------
      Nils N. Trulsvik, Director


*By:  /s/David Robson                                       Date: September 19, 2002
      --------------------------------------------------
      David Robson, Attorney-in-Fact







                                  EXHIBIT INDEX



  FILED
HEREWITH                                         EXHIBIT
--------                                         -------
                
  X         25(1)     Power of attorney of certain signatories (contained on signature page
                      included in Part II of the Registration Statement on Form S-1 filed with the
                      SEC on August 17, 2001 (File No. 333-67814))