Document:

Second Amendment to Change in Control Plan

 Exhibit 10.1 
  
 PATINA OIL & GAS CORPORATION 
  
 SECOND AMENDMENT TO 
 AMENDED AND RESTATED

 CHANGE IN CONTROL PLAN 
  
 This Second Amendment to the Amended and Restated Change in Control Plan (the “Plan”) is adopted effective as of May 3, 2005 (the
“Effective Date”) by Patina Oil & Gas Corporation, a Delaware corporation (the “Company”). Capitalized terms used but not defined herein shall have the meanings ascribed thereto in the Plan. 
  
 WHEREAS, the Company has previously entered into the Agreement and
Plan of Merger dated as of December 15, 2004, as amended (the “Merger Agreement”), by and among the Company, Noble Energy, Inc. and Noble Energy Production, Inc., which provides for the merger of the Company with and into Noble Energy
Production, Inc. (the “Merger”), as further described therein; and 
  
 WHEREAS, in the event the Merger is consummated, the Company desires to enhance the benefits payable to the participants in the Plan; 
  
 NOW THEREFORE, the Company hereby adopts this Second Amendment to the Plan. 
  
 1. Effectiveness. 
  
 (a) This Second Amendment shall be effective as of the Effective Date,
provided, however, that in the event the Merger is not consummated and the Merger Agreement is terminated in accordance with its terms, this Second Amendment shall be null and void ab initio and of no further force or
effect. 
  
 (b) Subject to Section 1(a) and except as provided in
Section 2, the terms and conditions of the Plan as in effect immediately prior to the Effective Date shall continue to be in effect on and after the Effective Date. 
  
 2. Amendment. Section 3 of the Plan is hereby amended by inserting the following new paragraphs (f), (g), (h) and (i)
immediately after paragraph (e) thereof: 
  
 (f) On the Closing
Date (as defined in the Agreement and Plan of Merger dated as of December 15, 2004, as amended, by and among the Company, Noble Energy, Inc. and Noble Energy Production, Inc.), the Company shall pay to each Employee set forth on a schedule approved
by the Compensation Committee of the Board at a meeting on May 3, 2005 a lump-sum amount in cash equal to the amount set forth opposite such Employee’s name on such schedule. 

 (g) In the event that any Employee who continues to be employed by the Company or its subsidiaries after
the Closing Date is terminated without cause on or prior to the third anniversary of the Closing Date, or resigns on or prior to the third anniversary of the Closing Date and within 30 days of a Material Change (in the case of an Executive) or
reduction in such Employee’s Base Compensation (in the case of a Key Manager or Regular Employee), then such Employee will receive a lump-sum payment in cash equal to (i) if such termination or resignation occurs on or prior to the first
anniversary of the Closing Date, three months of such Employee’s base salary as of the Closing Date and as reflected on the schedule described in paragraph (f) above, (ii) if such termination or resignation occurs after the first, and on or
before the second, anniversary of the Closing Date, two months of such Employee’s base salary as of the Closing Date and as reflected on the schedule described in paragraph (f) above and (iii) if such termination or resignation occurs after the
second, and on or before the third, anniversary of the Closing Date, one month of such Employee’s base salary as of the Closing Date and as reflected on the schedule described in paragraph (f) above. The Company agrees to pay such amount to
such Employee within five (5) calendar days of such termination or resignation. 
  
 (h) The Company shall pay to each person who, immediately prior to the Closing Date, was a member of the Board (other than any person who was at such time an employee of the Company or who thereafter becomes a member
of the board of directors of Noble Energy, Inc.) six consecutive monthly cash payments in the amount of $12,500, commencing on the fifteenth day of the first month following the Closing Date. 
  
 (i) The payments provided for under the Plan shall be subject to all tax
withholdings and deductions required by applicable law. 
  
 3. Governing
Law. This Second Amendment shall be governed by and subject to the laws of the State of Delaware. 
  

 2Amendment No. 2 to the Patina Oil & Gas Corporation 1996 Stock Plan

 Exhibit 10.2 
  
 AMENDMENT NO. 2 TO THE 
 PATINA OIL & GAS CORPORATION 
 1996 STOCK PLAN FOR NON-EMPLOYEE DIRECTORS 
  
 THIS AMENDMENT NO. 2 (this “Amendment”) to the Patina Oil
& Gas Corporation 1996 Stock Plan for Non-Employee Directors (the “Plan”), is hereby adopted as of May 3, 2005 by Patina Oil & Gas Corporation (the “Company”), pursuant to authority granted to it in Section
6 of the Plan. 
  
 WHEREAS, Section 1.8 of the Agreement and Plan
of Merger (the “Merger Agreement”), dated as of December 15, 2004, by and among Noble Energy, Inc. (“Parent”), the Company and Noble Energy Production, Inc. (“Purchaser”), as amended, provides that
at the Effective Time (as defined in the Merger Agreement) of the merger of the Company with and into Purchaser (the “Merger”), each Company Option (as defined in the Merger Agreement) that is outstanding and unexercised immediately
prior to the Effective Time shall cease to represent a right to acquire shares of Company Common Stock (as defined in the Merger Agreement) and shall be converted automatically into options to purchase shares of Parent Common Stock (as defined in
the Merger Agreement), subject to the other terms and conditions set forth in the Merger Agreement; 
  
 WHEREAS, Section 6 of the Plan provides that the Company may make certain adjustments to Stock Options in the event of certain corporate transactions,
including a merger involving the Company in which the Company is not the surviving corporation; and 
  
 WHEREAS, on December 15, 2004, the Board of Directors resolved that the Plan and each Stock Option issued thereunder was to be modified to provide that,
at the Effective Time, each Stock Option that is outstanding and unexercised immediately prior to the Effective Time shall cease to represent a right to acquire shares of Company capital stock and shall be converted automatically into options to
purchase shares of Parent common stock which shall have the other terms and conditions set forth in the Merger Agreement, and that each of the Chief Executive Officer, the President and the Executive Vice President and Chief Financial Officer was
authorized, empowered and directed in the name and on behalf of the Company to prepare, deliver, execute and adopt such amendments as are appropriate or necessary to effectuate the foregoing. 
  
 NOW, THEREFORE, the Plan is hereby amended as follows: 
  
 1. Amendment Relating to Treatment of Stock Options in the Merger.
There is hereby added a new Section 6A to the Plan, which provides: 
  
 “SECTION 6A. EFFECT OF THE MERGER. 
  
 Notwithstanding any provision of the Plan to the contrary, each Stock Option that is outstanding and unexercised immediately prior to the Effective Time (as defined in the Agreement and Plan of Merger (the “Merger
Agreement”), dated as of December 15, 2004, by and among Noble Energy, Inc. (“Parent”), the Company and Noble Energy Production, Inc.) 

 
shall cease to represent a right to acquire shares of Common Stock and shall be converted automatically into options to purchase shares of Parent Common
Stock (as defined in the Merger Agreement), and Parent shall assume each such Stock Option (hereinafter, “Assumed Option”) subject to the terms of the Plan and the agreement evidencing the grant hereunder of such Assumed Option
(other than the provisions hereof providing for termination of such Assumed Option at the Effective Time); provided, however, that (i) the number of shares of Parent Common Stock purchasable upon exercise of such Assumed Option shall
be equal to the number of shares of Common Stock that were purchasable under such Stock Option immediately prior to the Effective Time multiplied by the Exchange Ratio (as defined in the Merger Agreement) and rounded down to the nearest whole share
and (ii) the per share exercise price under such Assumed Option shall be adjusted by dividing the per share exercise price under such Stock Option by the Exchange Ratio, and rounding up to the nearest whole cent.” 
  
 2. Capitalized Terms; Choice of Law. Capitalized terms used but not
defined herein (or in the Merger Agreement) are used as defined in the Plan. This Amendment will be governed by and construed in accordance with the laws of the State of Delaware. 
  
 3. Effectiveness. This Amendment shall be effective as of the Effective Time of the Merger, provided, however, that
in the event the Merger is not consummated and the Merger Agreement is terminated in accordance with its terms, this Amendment shall be null and void ab initio and of no further force or effect. 
  
 * * * * * 

 IN WITNESS WHEREOF, this Amendment has been executed as of the date first written above. 
  

			
	PATINA OIL & GAS CORPORATION
		
	By:	 	 /s/ David J. Kornder

	Name:	 	David J. Kornder
	Title:	 	Executive Vice President and Chief Financial OfficerAmendment No. 3 to the Patina Oil & Gas Corporation 1996 Enployee Stock Option

 Exhibit 10.3 
  
 AMENDMENT NO. 3 TO THE 
 PATINA OIL & GAS CORPORATION 
 1996 EMPLOYEE STOCK OPTION PLAN 
  
 THIS AMENDMENT NO. 3 (this “Amendment”) to the Patina Oil
& Gas Corporation 1996 Employee Stock Option Plan (the “Plan”), is hereby adopted as of May 3, 2005, by Patina Oil & Gas Corporation (the “Corporation”), pursuant to authority granted to it in Sections 6.6
and 6.8 of the Plan. 
  
 WHEREAS, Section 1.8 of the Agreement and
Plan of Merger (the “Merger Agreement”), dated as of December 15, 2004, by and among Noble Energy, Inc. (“Parent”), the Corporation and Noble Energy Production, Inc. (“Purchaser”), as amended,
provides that at the Effective Time (as defined in the Merger Agreement) of the merger of the Corporation with and into Purchaser (the “Merger”), each Company Option (as defined in the Merger Agreement) that is outstanding and
unexercised immediately prior to the Effective Time shall cease to represent a right to acquire shares of Company Common Stock (as defined in the Merger Agreement) and shall be converted automatically into options to purchase shares of Parent Common
Stock (as defined in the Merger Agreement), subject to the other terms and conditions set forth in the Merger Agreement; 
  
 WHEREAS, Sections 6.6 and 6.8 of the Plan provide that the Corporation may make certain adjustments to Options in the event of a merger involving the
Corporation; and 
  
 WHEREAS, on December 15, 2004, the Board of
Directors resolved that the Plan and each Option issued thereunder was to be modified to provide that, at the Effective Time, each Option that is outstanding and unexercised immediately prior to the Effective Time shall cease to represent a right to
acquire shares of Corporation capital stock and shall be converted automatically into options to purchase shares of Parent common stock which shall have the other terms and conditions set forth in the Merger Agreement, and that each of the Chief
Executive Officer, the President and the Executive Vice President and Chief Financial Officer was authorized, empowered and directed in the name and on behalf of the Corporation to prepare, deliver, execute and adopt such amendments as are
appropriate or necessary to effectuate the foregoing. 
  
 NOW,
THEREFORE, the Plan is hereby amended as follows: 
  
 1.
Amendment Relating to Treatment of Options in the Merger. There is hereby added a new Section 6.6A to the Plan, which provides: 
  
 “SECTION 6.6A. EFFECT OF THE MERGER. 
  
 Notwithstanding any provision of the Plan to the contrary, each Option that is outstanding and unexercised immediately prior to the Effective Time (as
defined in the Agreement and Plan of Merger (the “Merger Agreement”), dated as of December 15, 2004, by and among Noble Energy, Inc. (“Parent”), the Corporation and Noble Energy Production, Inc.) shall cease to
represent a right to acquire shares of Stock and shall be converted automatically into options to 

 
purchase shares of Parent Common Stock (as defined in the Merger Agreement), and Parent shall assume each such Option (hereinafter, “Assumed
Option”) subject to the terms of the Plan and the agreement evidencing the grant hereunder of such Assumed Option (other than the provisions hereof providing for termination of such Assumed Option at the Effective Time); provided,
however, that (i) the number of shares of Parent Common Stock purchasable upon exercise of such Assumed Option shall be equal to the number of shares of Stock that were purchasable under such Option immediately prior to the Effective Time
multiplied by the Exchange Ratio (as defined in the Merger Agreement) and rounded down to the nearest whole share and (ii) the per share exercise price under such Assumed Option shall be adjusted by dividing the per share exercise price under such
Option by the Exchange Ratio, and rounding up to the nearest whole cent.” 
  
 2. Capitalized Terms; Choice of Law. Capitalized terms used but not defined herein (or in the Merger Agreement) are used as defined in the Plan. This Amendment will be governed by and construed in accordance
with the laws of the State of Delaware. 
  
 3.
Effectiveness. This Amendment shall be effective as of the Effective Time of the Merger, provided, however, that in the event the Merger is not consummated and the Merger Agreement is terminated in accordance with its terms, this Amendment
shall be null and void ab initio and of no further force or effect. 
  
 * * * * * 

 IN WITNESS WHEREOF, this Amendment has been executed as of the date first written above. 
  

			
	PATINA OIL & GAS CORPORATION
		
	By:	 	 /s/ David J. Kornder

	Name:	 	David J. Kornder
	Title:	 	Executive Vice President and Chief Financial Officer

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