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[RUSSIAN TRANSLATION AND DUPLICATE SIGNATURES REMOVED]

CLARIFICATION TO  THE  CONTRACT  OF  PURCHASE  AND SALE OF THE SHARE IN CHARTER
CAPITAL OF LLC "ZAURALNEFTEGAZ"  DATED  25  MAY  2004

Kurgan                                                           2  August  2005

     LIMITED  LIABILITY  COMPANY  "REGION",  OGRN  No.1024500514598  hereinafter
referred  to  as  the  "Seller",  in  the  person  of  director  Shkodskih  Oleg
Anatolievich, and the Company SIBERIAN ENERGY GROUP INC. hereinafter referred to
as  the  "Buyer", in the person of the Chairman of the Board David Zaikin agreed
on the following:

                          MAKE CLARIFICATION TO THE ITEM
                           1. SUBJECT OF THE CONTRACT

     The  original intention of the parties on the matters reflected in item 1.3
of  the Agreement was as follows: LLC Region has agreed to sell its share of 49%
in  LLC "Zauralneftegaz" for a price of 172 US Dollars and a right of the Seller
to instruct the Buyer to transfer 6,900,000 shares of SIBERIAN ENERGY GROUP INC.
to  another  person  (persons)  at  the Seller's discretion. The above-mentioned
shares  have  to be transferred directly to the persons whose names are given in
the instructions of the Seller, without the Seller's acquiring the title to such
shares.

Buyer:
SIBERIAN  ENERGY  GROUP  INC.
275  Madison  Avenue,  6th  Floor,  New  York,  NY  100016

/S/  DAVID  ZAIKIN
----------------------------------------------------------
David  Zaikin,  Chairman  of  the  Board

Seller:  LLC  "REGION"
Russia, 640006, Kurgan Region, Kurgan, 27/X Lenina Street.

/S/  OLEG  ANATOLIEVICH  SHKODSKIH
----------------------------------------------------------
Oleg  Anatolievich  Shkodskih,  Director

August  2,  2005

<PAGE>Exhibit 10.12

                                AGREEMENT NO. 001
                      FOR MARKETING AND CONSULTING SERVICES

KURGAN CITY                                                       APRIL 16, 2005

     Limited  liability company "Zauralneftegaz", hereinafter referred to as the
"Client",  in  the  person  of  general  director  Oleg  V. Zhuravlev, acting in
compliance  with  the by-laws, on one side, and LLC "Consulting firm "Business -
Standard", hereinafter referred to as the "Consultant", in the person of general
director  I.S.  Ryabokon,  acting  in  compliance with the by-laws, on the other
side,  together  referred  to  as  the  "parties", have entered this contract as
follows:

                            1. SUBJECT OF AGREEMENT

     1.1  By  order  from  the  client,  the  Consultant is obliged to study the
licensed  fields  market  on  the  territory  of  Kurgan  oblast,  available for
geological  survey,  study  and  exploration  of hydrocarbon resources, with the
purpose of their subsequent extraction.

     1.2  The  goal  of  marketing  exploration is: to identify the potential of
detecting hydrocarbons on the following licensed fields offered:

     -    Lebyazhevsky, located in Lebyazhevsky region of Kurgan oblast;

     -    Yuzhno-Voskresensky,  located  on  the  territory  of  Mokrousovsky,
          Makushinsky, and Chastoozersky regions;

     -    Zapadno-Petuhovsky,  located  on  the  territory  of  Petuhovsk region
          of Kurgan oblast (chart attached).

                    2. RIGHTS AND OBLIGATIONS OF THE PARTIES

     2.1  During the period that this agreement remains in effect, the Client is
obliged  to inform the Consultant about all known licensed fields, offered or to
be  offered  at  action/tender on the territory of Kurgan oblast, for geological
study,  survey  and  exploration  of hydrocarbon resources with their subsequent
extraction.

     2.2  The  Consultant is obliged to supply marketing and consulting services
for  a  period  of  three  (3) months from the moment of signing this agreement,
while the Client is obliged to accept and compensate for the services provided.

     2.3  For the purposes of performing marketing services, the Consultant must
perform the following tasks during the term of this agreement:

     -    collect  and  study  geological  information  pertaining  to  previous
          exploratory activities on the territory of Kurgan oblast;

     -    conduct  interpretation  of  geological  materials  and  profile
          correlation  within  the boundaries of Vagay-Ishimskaya Basin, as well
          as identify prospective horizons for exploring hydrocarbon resources;

     -    perform  the  construction  of  structural-lithologic  maps within the
          range of licensed fields offered at auction/tender;

     -    if  the  Client  is  required  to  participate  in  a  tender  for  a
          license or an open auction, the Consultant must provide legal guidance
          and  consultations  throughout the entire process, up until the Client
          receives title to the license.

<PAGE>

     2.4  On  the  basis of information, received in the process of exploration,
the Consultant provides the following into the Client's ownership:

     -    all  and  entire  geological  information,  collected  while executing
          the  terms  of  this agreement, including but not limited to: reports,
          supplementary notes, maps, explanations/descriptions, and memoranda;

     -    investment program for geological exploration activities;

     -    project  of  license  agreement  terms  and  conditions  for
          Yuzhno-Voskresensky,  Lebyazhevsky and Zapadno-Petuhovsky fields, with
          the "per object" plan of executing geological exploration;

The parties must sign a transfer-receipt act with every transfer and receipt of
report materials.

     2.5 The Consultant holds the right to attract/involve third parties for the
execution of this agreement.

                    3. THE COST OF SERVICES AND COMPENSATION

     3.1  The  cost of services under this agreement equals a sum, equivalent to
500,000  (five  hundred  thousand) US dollars. Costs, incurred by the Consultant
that pertain to this agreement, are included in the cost of services and are NOT
separately reimbursed.

     3.2  The  Consultant's  services are subject to payment under the following
time periods and conditions: a sum, equivalent to 250,000 (two hundred and fifty
thousand)  US  dollars  are  paid  as  a  down-payment within five (5) after the
signing of this agreement, and the outstanding amount is paid within thirty (30)
days after the receipt and transfer of report materials.

                    4. TERM OF AGREEMENT AND OTHER CONDITIONS

     4.1  This  agreement  becomes effective as of the day of its signing by the
parties and subjects both parties to its provisions. The terms of this agreement
are  applicable  to  only those relations between the parties, which arise after
the signing of this agreement.

     4.2  Termination of this agreement entails the termination of all pertinent
parties'  obligations,  but  does  not  release  the  parties  from  their
responsibilities  for  the  violation  of  this agreement, if such have occurred
while executing the terms of this agreement.

     4.3  The  parties  express mutual understanding that in case of engaging an
additional  license  (fourth),  this  agreement  will be augmented with terms of
obtaining  this  additional  license.  With  this,  the  cost of services by the
Consultant  relating  to  acquiring  this  additional  license will equal a sum,
equivalent  to  170,000  (one  hundred and seventy thousand) US dollars, whereas
other terms and conditions will be analogous to this agreement.

     4.4. All amendments and additions to this agreement will carry legal affect
only when written and signed by both parties.

     4.5  Disputes  related  to the amendment, termination and execution of this
agreement,  are  to  be  resolved  in  compliance  with  the laws of the Russian
Federation.  All  other  matters,  not  stipulated  by  this  agreement, will be
governed  by the laws of the Russian Federation.

     4.6  This  agreement  is  published  in two copies, each having equal legal
rights.

     4.7 The terms of this agreement and stipulated obligations are confidential
and  cannot  be  publicized.  All  information,  obtained  in  relation  to this
agreement  is  the  Client's property and cannot be publicized or transferred to
third parties, except "Baltic Petroleum Limited", which is presently a technical
partner  of  Zauralneftegaz  in  the  project  of  geological  survey, study and
exploration  of  hydrocarbon  resources  on  the  territory of Kurgan oblast. As
technical  partner,  Baltic  Petroleum  Limited  has  access to all information,
obtained from the Consultant in the course of executing this agreement.

<PAGE>

                 5. THE PARTIES' LEGAL ADDRESSES AND SIGNATURES

     The Client:                          The Consultant:
LLC "Zauralneftegaz"                    LLC "Consulting firm "Business-Standard"
Tax Payer ID: 4501094906                Tax Payer ID: 7709370935

/s/ Oleg V. Zhuravlev                   /s/ I.S. Ryabokon
---------------------                   ------------------
   (signature)                             (signature)

<PAGE>Exhibit 10.13

                        SUPPLEMENTARY AGREEMENT NO.1
     TO M-1 AGREEMENT DATED APRIL 16, 2005 FOR THE PROVISION OF MARKETING AND
                              CONSULTING SERVICES.

Kurgan city                                                      April 25, 2005

     Limited  liability company "ZAURALNEFTEGAZ", hereinafter referred to as the
"Client",  in  the  person  of  general  director  Oleg  V. Zhuravlev, acting in
compliance  with  the  by-laws,  on  one  side,  and  LLC  "CONSULTING  FIRM
BUSINESS-STANDARD",  hereinafter  referred to as the "Consultant", in the person
of general director I.S. Ryabokon, acting in compliance with the by-laws, on the
other  side,  together  referred  to  as  the  "parties",  have  entered  this
supplementary  agreement  to  the  M-1  agreement  dated  April 16, 2005 for the
provision of marketing and consulting services, as follows:

     1. Clause 3.2 of the abovementioned agreement shall read as follows:

"3.2 The Consultant's services are subject to payment under the following time
periods and conditions: a sum, equivalent to 250,000 (two hundred and fifty
thousand) US dollars are paid as a down-payment within five (5) after the
signing of this agreement, and the outstanding amount is paid upon receiving a
notary certified copy of a letter from the Ministry of Natural Resources of the
Russian Federation, confirming the Client's title to the licenses, mentioned in
clause 1.2 of this agreement."

SIGNATURES OF THE PARTIES:

     The Client:                      The Consultant:
LLC "Zauralneftegaz"                  LLC "Consulting firm "Business-Standard"
Tax Payer ID: 4501094906              Tax Payer ID: 7709370935

/s/ Oleg V. Zhuravlev                 /s/ I.S. Ryabokon
---------------------------           --------------------------
     (signature)                            (signature)

<PAGE>

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