SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* FIRST RESERVE CORP (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 12/08/2005	3. Issuer Name and Ticker or Trading Symbol BASIC ENERGY SERVICES INC [ BAS ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	3,371,175(1)	I	See FN(2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* FIRST RESERVE CORP (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* FIRST RESERVE FUND VIII L P (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* FIRST RESERVE GP VIII L P (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. Consists of 3,371,175 shares of Common Stock held directly by First Reserve Fund VIII, L.P. ("Fund VIII").

2. This Form 3 is being filed on behalf of First Reserve Corporation ("FRC"), First Reserve GP VIII, L.P. ("GP VIII"), and Fund VIII, each as 10% beneficial owners. GP VIII is the general partner of Fund VIII and may be deemed to share beneficial ownership of the shares of Common Stock owned by Fund VIII. FRC, as the general partner of GP VIII, may be deemed to share beneficial ownership of Common Stock owned by Fund VIII.

Remarks:

First Reserve Corporation by Anne E. Gold, General Counsel, is signing for itself as the designated filer, as well as in the capacity of general partner of First Reserve GP VIII, L.P. First Reserve GP VIII, L.P., by Anne E. Gold, is signing in its capacity as the general partner of First Reserve Fund VIII, L.P.

	/s/ Anne E. Gold	12/08/2005
	/s/ Anne E. Gold	12/08/2005
	/s/ Anne E. Gold	12/08/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.