Exhibit 24

                           LIMITED POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS:

      That the undersigned hereby constitutes and appoints each of Daniel
Belhumeur, Meredith Mouer and Christopher Daniels, signing singly, the
undersigned's true and lawful attorney-in-fact to:

      (1)   execute for and on behalf of the undersigned a Form ID, and any
other forms or reports the undersigned may be required to file with the United
Stated Securities and Exchange Commission in connection with the undersigned's
ownership, acquisition, or disposition of securities of Magellan Petroleum
Corporation, a Delaware corporation (the "Company");

      (2)   do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such form or
report, and timely file such form or report with the United States Securities
and Exchange Commission and any stock exchange or similar authority; and

      (3)   take any other action of any type whatsoever in connection with the
foregoing, including any action in connection with obtaining filing codes for
the undersigned, which, in the opinion of such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the undersigned, it
being understood that the documents executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may approve in
such attorney-in-fact's discretion.

      The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in- fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Power of Attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with any requirement under the Securities Act of 1933 or the Securities Exchange
Act of 1934 or other law or regulation.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file forms or reports with the United
States Securities and Exchange Commission with respect to the undersigned's
holdings of and transactions in securities issued by the Company, unless earlier
revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 29th day of January 2017.


                                          /s/ Dillon J. Ferguson
                                          --------------------------------
                                          Signature

                                          Dillon J. Ferguson
                                          --------------------------------
                                          Print Name