UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. )*

Rio Vista Energy Partners L.P.
(Name of Issuer)

Common Units
(Title of Class of Securities)

767271109
(CUSIP Number)

November 29, 2007
(Date of Event which Requires Filing
of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[ ] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


--------------------------------- -------------------
CUSIP No. 767271109 13G Page 2 of 10 Pages
--------------------------------- -------------------

---------- ---------------------------------------------------------------------
 1 NAME OF REPORTING PERSON
 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

 Standard General L.P.
---------- ---------------------------------------------------------------------
 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 (a) [ ]
 (b) [X]
---------- ---------------------------------------------------------------------
 3 SEC USE ONLY
---------- ---------------------------------------------------------------------
 4 CITIZENSHIP OR PLACE OF ORGANIZATION

 Delaware
--------------------- ----- ----------------------------------------------------
 5 SOLE VOTING POWER

 0
 ----- ----------------------------------------------------
 6 SHARED VOTING POWER
NUMBER OF UNITS
BENEFICIALLY OWNED 200,375
BY EACH REPORTING ----- ----------------------------------------------------
PERSON WITH 7 SOLE DISPOSITIVE POWER

 0
 ----- ----------------------------------------------------
 8 SHARED DISPOSITIVE POWER

 200,375
---------- ---------------------------------------------------------------------
 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 200,375
---------- ---------------------------------------------------------------------
 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN UNITS

 [ ]

---------- ---------------------------------------------------------------------
 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 8.25%
---------- ---------------------------------------------------------------------
 12 TYPE OF REPORTING PERSON*

 PN
---------- ---------------------------------------------------------------------

 *SEE INSTRUCTION BEFORE FILLING OUT

 Page 2 of 10


---------------------------------- -------------------
CUSIP No. 767271109 13G Page 3 of 10 Pages
--------------------------------- -------------------

---------- ---------------------------------------------------------------------
 1 NAME OF REPORTING PERSON
 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

 Standard General Fund L.P.
---------- ---------------------------------------------------------------------
 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 (a) [ ]
 (b) [X]
---------- ---------------------------------------------------------------------
 3 SEC USE ONLY
---------- ---------------------------------------------------------------------
 4 CITIZENSHIP OR PLACE OF ORGANIZATION

 Delaware
--------------------- ----- ----------------------------------------------------
 5 SOLE VOTING POWER

 0
 ----- ----------------------------------------------------
 6 SHARED VOTING POWER
NUMBER OF UNITS
BENEFICIALLY OWNED 200,375
BY EACH REPORTING ----- ----------------------------------------------------
PERSON WITH 7 SOLE DISPOSITIVE POWER

 0
 ----- ----------------------------------------------------
 8 SHARED DISPOSITIVE POWER

 200,375
---------- ---------------------------------------------------------------------
 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 200,375
---------- ---------------------------------------------------------------------
 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN UNITS

 [ ]

---------- ---------------------------------------------------------------------
 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 8.25%
---------- ---------------------------------------------------------------------
 12 TYPE OF REPORTING PERSON*

 PN
---------- ---------------------------------------------------------------------

 *SEE INSTRUCTION BEFORE FILLING OUT

 Page 3 of 10


---------------------------------- -------------------
CUSIP No. 767271109 13G Page 4 of 10 Pages
--------------------------------- -------------------

---------- ---------------------------------------------------------------------
 1 NAME OF REPORTING PERSON
 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

 Soohyung Kim
---------- ---------------------------------------------------------------------
 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 (a) [ ]
 (b) [X]
---------- ---------------------------------------------------------------------
 3 SEC USE ONLY
---------- ---------------------------------------------------------------------
 4 CITIZENSHIP OR PLACE OF ORGANIZATION

 United States
--------------------- ----- ----------------------------------------------------
 5 SOLE VOTING POWER

 0
 ----- ----------------------------------------------------
 6 SHARED VOTING POWER
NUMBER OF UNITS
BENEFICIALLY OWNED 200,375
BY EACH REPORTING ----- ----------------------------------------------------
PERSON WITH 7 SOLE DISPOSITIVE POWER

 0
 ----- ----------------------------------------------------
 8 SHARED DISPOSITIVE POWER

 200,375
---------- ---------------------------------------------------------------------
 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 200,375
---------- ---------------------------------------------------------------------
 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN UNITS

 [ ]

---------- ---------------------------------------------------------------------
 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 8.25%
---------- ---------------------------------------------------------------------
 12 TYPE OF REPORTING PERSON*

 IN
---------- ---------------------------------------------------------------------

 *SEE INSTRUCTION BEFORE FILLING OUT

 Page 4 of 10


---------------------------------- -------------------
CUSIP No. 767271109 13G Page 5 of 10 Pages
--------------------------------- -------------------

---------- ---------------------------------------------------------------------
 1 NAME OF REPORTING PERSON
 I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

 Nicholas J. Singer
---------- ---------------------------------------------------------------------
 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 (a) [ ]
 (b) [X]
---------- ---------------------------------------------------------------------
 3 SEC USE ONLY
---------- ---------------------------------------------------------------------
 4 CITIZENSHIP OR PLACE OF ORGANIZATION

 United States
--------------------- ----- ----------------------------------------------------
 5 SOLE VOTING POWER

 0
 ----- ----------------------------------------------------
 6 SHARED VOTING POWER
NUMBER OF UNITS
BENEFICIALLY OWNED 200,375
BY EACH REPORTING ----- ----------------------------------------------------
PERSON WITH 7 SOLE DISPOSITIVE POWER

 0
 ----- ----------------------------------------------------
 8 SHARED DISPOSITIVE POWER

 200,375
---------- ---------------------------------------------------------------------
 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 200,375
---------- ---------------------------------------------------------------------
 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN UNITS

 [ ]

---------- ---------------------------------------------------------------------
 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

 8.25%
---------- ---------------------------------------------------------------------
 12 TYPE OF REPORTING PERSON*

 IN
---------- ---------------------------------------------------------------------

 *SEE INSTRUCTION BEFORE FILLING OUT

 Page 5 of 10


Item 1(a) Name of Issuer:

Rio Vista Energy Partners L.P.

Item 1(b) Address of Issuer's Principal Executive Offices:

1313 Alton Gloor Blvd., Ste J, Brownsville, TX 78526

Items 2(a) Name of Person Filing:

This statement is filed by: (i) Standard General Fund L.P. ("Standard General Fund") with respect to the common units representing limited partner interests of the Issuer it directly owns (the "Units"); (ii) Standard General L.P. ("Standard General") with respect to the Units, which it may be deemed to beneficially own pursuant to its investment management agreement with Standard General Fund pursuant to which Standard General has all investment and voting power with respect to securities held by Standard General Fund;
(iii) Soohyung Kim ("Mr. Kim"), a co-managing member of Standard General Management LLC, a Delaware limited liability company ("Standard General Management"), which is the managing member of Standard General GP LLC, a Delaware limited liability company, which is in turn the general partner of Standard General Fund, with respect to the Units; and (iv) Nicholas J. Singer ("Mr. Singer"), a co-managing member of Standard General Management, with respect to the Units.

Mr. Kim and Mr. Singer may be deemed to have indirect beneficial ownership of the Units based on the foregoing relationships. In addition, Mr. Kim and Mr. Singer have controlling interests in Standard General S Corp., a Delaware corporation, which is the general partner of Standard General Holdings, L.P., a Delaware limited partnership. Standard General Holdings, L.P. is the general partner of Standard General.

Standard General, Standard General Fund, Mr. Kim and Mr. Singer have entered into a Joint Filing Agreement, a copy of which is filed with this Schedule 13G as Exhibit 99.1, pursuant to which they have agreed to file this Schedule 13G jointly in accordance with the provisions of Rule 13d-1(k) of the Securities Exchange Act of 1934, as amended.

Item 2(b) Address of Principal Business Office:

The address of the principal business office of Standard General, Standard General Fund, Mr. Kim and Mr. Singer is 650 Madison Avenue, 26th Floor, New York, NY 10022.

Page 6 of 10

Item 2(c) Citizenship:

Standard General and Standard General Fund are Delaware limited partnerships. Mr. Kim and Mr. Singer are United States citizens.

Item 2(d) Title of Class of Securities:

Common Units

Item 2(e) CUSIP Number:

767271109

Item 3 Not Applicable

Item 4 Ownership:

The percentages used herein are based upon 2,429,206 Units issued and outstanding as of November 29, 2007, calculated as the sum of (i) 1,935,656 Units issued and outstanding as of November 9, 2007 according to the Issuer's Form 10-Q filed with the Securities and Exchange Commission on November 19, 2007, (ii) 137,994 Units issued by the Issuer on November 19, 2007 according to the Issuer's Form 8-K filed with the Securities and Exchange Commission on November 26, 2007, and (iii) 355,556 Units issued by the Issuer on December 3, 2007 according to the Issuer's Form 8-K filed with the Securities and Exchange Commission on December 4, 2007.

As of the close of business on December 6, 2007:

1. Standard General L.P.
(a) Amount beneficially owned: 200,375
(b) Percent of class: 8.25%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 200,375
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:


200,375

2. Standard General Fund L.P.
(a) Amount beneficially owned: 200,375
(b) Percent of class: 8.25%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 200,375
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:


200,375

Page 7 of 10

3. Soohyung Kim
(a) Amount beneficially owned: 200,375
(b) Percent of class: 8.25%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 200,375
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:


200,375

4. Nicholas J. Singer
(a) Amount beneficially owned: 200,375
(b) Percent of class: 8.25%
(c)(i) Sole power to vote or direct the vote: -0-
(ii) Shared power to vote or direct the vote: 200,375
(iii) Sole power to dispose or direct the disposition: -0-
(iv) Shared power to dispose or direct the disposition:


200,375

Standard General, Mr. Kim and Mr. Singer do not directly own any of the Units. By reason of the provisions of Rule 13d-3 of the Securities Exchange Act of 1934, each of Standard General, Mr. Kim and Mr. Singer may be deemed to own beneficially 200,375 Units (constituting approximately 8.25% of the Units outstanding). Each of Standard General, Mr. Kim and Mr. Singer disclaim direct beneficial ownership of any of the securities covered by this statement.

Item 5 Ownership of Five Percent or Less of a Class:

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following. [ ]

Item 6 Ownership of More than Five Percent on Behalf of Another

Person:

Other than as set forth herein, no other person has the right to receive or the power to direct the receipt of dividends from, or proceeds from the sale of, in excess of 5% of the total outstanding Units.

Page 8 of 10

Item 7 Identification and Classification of the

Subsidiary Which Acquired the Security Being
Reported on By the Parent Holding Company:

Not Applicable

Item 8 Identification and Classification of Members

of the Group:

Not Applicable

Item 9 Notice of Dissolution of Group:

Not Applicable

Item 10 Certification:

By signing below the signatory certifies that, to the best of his knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Page 9 of 10

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: December 7, 2007

STANDARD GENERAL L.P.

By: /s/ Scott Cohen
 ----------------------------
 Name: Scott Cohen
 Title: Attorney-in-Fact

STANDARD GENERAL FUND L.P.

By: /s/ Scott Cohen
 ----------------------------
 Name: Scott Cohen
 Title: Attorney-in-Fact

SOOHYUNG KIM

By: /s/ Scott Cohen
 ----------------------------
 Name: Scott Cohen
 Title: Attorney-in-Fact

NICHOLAS J. SINGER

By: /s/ Scott Cohen
 ----------------------------
 Name: Scott Cohen
 Title: Attorney-in-Fact


EXHIBIT INDEX

Exhibit 99.1: Joint Filing Agreement, dated December 7, 2007, by and between Standard General L.P., Standard General Fund L.P., Soohyung Kim and Nicholas J. Singer.

Exhibit 99.2: Power of Attorney granted by Standard General L.P. in favor of Scott Cohen, dated August 14, 2007.

Exhibit 99.3: Power of Attorney granted by Standard General Fund L.P. in favor of Scott Cohen, dated December 4, 2007.

Exhibit 99.4: Power of Attorney granted by Soohyung Kim in favor of Scott Cohen, dated August 14, 2007.

Exhibit 99.5: Power of Attorney granted by Nicholas J. Singer in favor of Scott Cohen, dated December 4, 2007.

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