Document:

EX-10.2

 Exhibit 10.2 

ASSIGNMENT OF EQUITY INTERESTS 

THIS ASSIGNMENT OF EQUITY INTERESTS (the “Assignment”) is made and entered into as of the      day
of                     , 2017 (the “Effective Date”), by and between Atlas Resources, LLC, a Pennsylvania limited liability
company, (“Assignor”) and Diversified Energy LLC, an Alabama limited liability company (the “Assignee”). 

W I T N E S S E T H : 

WHEREAS, the Assignor is the owner of 100% of the Equity Interests (the “Interests”) in DGOC Partnership Holdings II,
LLC (the “Company”), in each case as set forth on Exhibit A; 
 WHEREAS, Assignor and Assignee and the other
signatories thereto have entered into that certain Purchase and Sale Agreement dated May 4, 2017 (the “Purchase Agreement”), and capitalized terms used but not defined herein shall have the meanings given to them in the
Purchase Agreement; 
 WHEREAS, the Assignor desires to assign all of its right, title and interest in and to the Interests to
Assignee, and Assignee desires to accept such assignment from Assignors, pursuant to the Purchase Agreement and the terms herein and subject to Delaware Law currently in effect with respect to the Company; and 

WHEREAS, following the assignment of the Interests to the Assignee, the Assignor will no longer own any Equity Interests in the Company
and the Assignee will be the owner of the Interests. 
 NOW, THEREFORE, in consideration of the promises and the mutual covenants
hereinafter set forth, and intending to be legally bound, the parties hereto hereby agree as follows: 

1.    Assignment. In accordance with the terms and conditions of the Purchase Agreement,
Assignor hereby assigns and delivers to Assignee, as of the Effective Date, all of Assignor’s right, title and interest in and to the Interests, including but not limited to all voting and financial rights, earnings, profits, capital accounts
and any distributions arising from or attributable to the Interests or fees and income payable to the Assignor by the Company on account of the Interests. 

2.    Purchase Agreement. This Assignment is in all respects subject to the provisions of the
Purchase Agreement and is not intended in any way to supersede, limit or qualify any provision thereof. To the extent any conflict or inconsistency exists between the provisions of this Assignment and the Purchase Agreement, the provisions of the
Purchase Agreement shall be controlling to the extent of such conflict or inconsistency. 
 3.    Binding
Effect. This Assignment shall inure to the benefit of, and shall be binding upon, the respective parties hereto, their heirs, personal representatives, successors and assigns. 

 4.    Governing Law. THIS ASSIGNMENT, THE OBLIGATIONS OF
THE PARTIES UNDER THIS ASSIGNMENT AND ALL OTHER MATTERS ARISING OUT OF OR RELATING TO THIS ASSIGNMENT AND THE TRANSACTIONS IT CONTEMPLATES, WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, WITHOUT GIVING EFFECT TO
ANY CONFLICTS OF LAW PRINCIPLES THAT WOULD CAUSE THE LAWS OF ANOTHER JURISDICTION TO APPLY. ANY DISPUTE ARISING OUT OF OR RELATING TO THIS ASSIGNMENT WHICH CANNOT BE AMICABLY RESOLVED BY THE PARTIES, SHALL BE BROUGHT IN A FEDERAL OR STATE COURT OF
COMPETENT JURISDICTION SITTING IN HARRIS COUNTY OF THE STATE OF TEXAS, AND THE PARTIES IRREVOCABLY SUBMIT TO THE JURISDICTION OF ANY SUCH COURT SOLELY FOR THE PURPOSE OF ANY SUCH SUIT, ACTION OR PROCEEDING. 

5.    Counterparts. This Assignment may be executed in two (2) or more counterparts, each of
which the parties will treat as an original but all of which together will constitute one and the same instrument. The signatures of all the parties need not appear on the same counterpart and delivery of an executed counterpart signature page of
this Assignment (including by means of facsimile or email attaching a copy in portable document format (.pdf)) will be equally as effective as delivery of an original executed counterpart of this Assignment in the presence of the other party. This
Assignment is effective on the delivery of one (1) executed counterpart from each party to the other party. 
 [Signature page
follows] 

 IN WITNESS WHEREOF, the parties hereto have caused this Assignment to be executed on the
day and year first above written. 
  

			
	 ASSIGNOR:
  

Atlas Resources, LLC, a Pennsylvania limited liability company

		
	By:  	 	 
		
	Name:  	 	  

		
	Title:  	 	  

  

			
	 ASSIGNOR:
  

DIVERSIFIED ENERGY LLC, an Alabama limited liability company

		
	By:  	 	 
		
	Name:  	 	  

		
	Title:  	 	  

 Acknowledged, agreed and accepted this      day of
                    , 2017: 
  

			
	  
 by:
                    , its managing general partner

		
	By:  	 	 
		
	Name:  	 	  

		
	Its:  	 	  

 Signature page — Assignment of Equity Interests (DGOC Partnership Holdings II, LLC) 

 EXHIBIT A 

Equity Interest 
 Atlas Resources, LLC: 100%
Equity Interests of DGOC Partnership Holdings II, LLC.EX-10.4

 Exhibit 10.4 

PARTIAL ASSIGNMENT AGREEMENT 

This PARTIAL ASSIGNMENT AGREEMENT (the “Assignment”) is made and entered into as of
                    , 2017, by and between Atlas Resources Series 28-2010 L.P., a Delaware limited partnership
(“Assignor”) and DGOC Series 28, L.P., a Delaware limited partnership (“Assignee”). 
 RECITALS

 WHEREAS, Assignor is party to that certain Drilling and Operating Agreement with Atlas Resources, LLC, a Pennsylvania limited
liability company (“Titan”), dated May 15, 2010 (the “Operating Agreement”); 
 WHEREAS,
pursuant to such Operating Agreement, Assignor acquired certain of Titan’s rights to develop certain wells in the United States; 

WHEREAS, pursuant to a Contribution Agreement by and between Assignor and Assignee, dated
                    , 2017 (the “Contribution Agreement”), Assignor contributed the Set I Wells (as defined in the
Contribution Agreement) subject to the Operating Agreement, while retaining all other wells subject to the Operating Agreement; and 

WHEREAS, Assignor desires to transfer and assign to Assignee all of Assignor’s rights, title and interest in and to the Operating
Agreement as it relates to the Set I Wells, and Assignee desires to accept such assignment. 
 AGREEMENT 

NOW, THEREFORE, the parties hereto, intending to be legally bound, do hereby agree as follows: 

1. Assignor hereby transfers and assigns to Assignee, and Assignee hereby acquires from Assignor all of Assignor’s rights, title, and
interest in and to the Operating Agreement as it relates to the Set I Wells set forth on Exhibit A attached hereto (the partial assignment of the Operating Agreement with respect to the Set I Wells is referred to as the “Set I
Assignment”), and Assignee hereby assumes and agrees to perform all of the obligations of the Assignor pursuant to the Set I Assignment, of whatever kind or nature, from and after the date of this Assignment. 

2. The parties shall each take such further actions and to execute, acknowledge and deliver all such further documents as are reasonably
requested by the other party for carrying out the purposes of this Assignment or of any document delivered pursuant to this Assignment. 

3. The effective date of this Assignment shall be
                    , 2017. 
 4.
All of the provisions hereof will inure to the benefit of, and be binding upon the respective successors and assigns of Assignor and Assignee. All references herein to either Assignor or Assignee will include their respective successors and assigns.

 5. This Assignment may be executed in one or more counterparts, each of which will be deemed an
original but all of which together will constitute one and the same agreement. 
 [Signature Page Follows] 

 IN WITNESS WHEREOF, the parties hereto have duly executed this Assignment on the date first
written above. 
  

			
	ASSIGNOR:
	
	ATLAS RESOURCES SERIES 28-2010 L.P.
	
	By: Atlas Resources, LLC,
	 a Pennsylvania limited liability company,

as general partner

		
	By:	 	 
	Name:
	Title:
	
	ASSIGNEE:
	
	DGOC SERIES 28, L.P.
	
	By: Atlas Resources, LLC,
	 a Pennsylvania limited liability company,

as general partner

		
	By:	 	 
	Name:
	Title:
	
	The following party joins this document solely for the purpose of consenting to this partial assignment of the Operating Agreement:
	
	ATLAS RESOURCES, LLC,
	a Pennsylvania limited liability company
		
	By:	 	 
	Name:
	Title:

 Exhibit A 

See the Drilling and Operating Agreement for Atlas Resources Series 28-2010 L.P. (incorporated by reference to Exhibit 10.1 to the Form 10-12G Registration
Statement of Atlas Resources Series 28-2010 L.P. dated April 29, 2011, as amended).EX-10.5

 Exhibit 10.5 

PARTIAL ASSIGNMENT AGREEMENT 

This PARTIAL ASSIGNMENT AGREEMENT (the “Assignment”) is made and entered into as of
                    , 2017, by and between Atlas Resources, LLC, a Pennsylvania limited liability company (“Assignor”)
and Diversified Oil & Gas, LLC, an Alabama limited liability company (“Assignee”). 
 RECITALS 

WHEREAS, Assignor is party to that certain Drilling and Operating Agreement with Atlas Resources Series 28-2010 L.P., a Delaware
limited partnership (“Atlas LP”), dated May 15, 2010 (the “Operating Agreement”); 
 WHEREAS,
pursuant to such Operating Agreement, Atlas LP acquired certain of Assignor’s rights to develop certain wells in the United States; 

WHEREAS, pursuant to that certain Contribution Agreement (the “Contribution Agreement”) by and between Atlas LP and
DGOC Series 28, L.P., a Delaware limited partnership (“DGOC LP”), dated                     , 2017, Atlas LP contributed the
Set I Wells (as defined in the Contribution Agreement) subject to the Operating Agreement to DGOC LP, while retaining those other wells subject to the Operating Agreement; 

WHEREAS, pursuant to that certain Partial Assignment Agreement by and between Atlas LP and DGOC LP dated
                    , 2017, Atlas LP assigned all its rights, title and interest in and to the Operating Agreement only as it pertains to the
Set I Wells to DGOC LP; 
 WHEREAS, Assignor desires to transfer and assign to Assignee all of Assignor’s rights, title and
interest in and to the Operating Agreement only as it pertains to the Set I Wells, and Assignee desires to accept such assignment. 

AGREEMENT 
 NOW,
THEREFORE, the parties hereto, intending to be legally bound, do hereby agree as follows: 
 1. Assignor hereby transfers and assigns to
Assignee, and Assignee hereby acquires from Assignor all of Assignor’s rights, title, and interest in and to the Operating Agreement attached hereto as Exhibit A, but only as it pertains to the Set I Wells, and Assignee hereby assumes
and agrees to perform all of the obligations of the Assignor under the Operating Agreement as it pertains to the Set I Wells, of whatever kind or nature, from and after the date of this Assignment. 

2. The parties shall each take such further actions and to execute, acknowledge and deliver all such further documents as are reasonably
requested by the other party for carrying out the purposes of this Assignment or of any document delivered pursuant to this Assignment. 

3. The effective date of this Assignment shall be
                    , 2017. 

 4. All of the provisions hereof will inure to the benefit of, and be binding upon the respective
successors and assigns of Assignor and Assignee. All references herein to either Assignor or Assignee will include their respective successors and assigns. 

5. This Assignment may be executed in one or more counterparts, each of which will be deemed an original but all of which together will
constitute one and the same agreement. 
 [Signature Page Follows] 

 IN WITNESS WHEREOF, the parties hereto have duly executed this Assignment on the date first
written above. 
  

			
	 ASSIGNOR:
  

ATLAS RESOURCES, LLC

		
	By:	 	 
	Name:
	Title:
	
	ASSIGNEE:
	
	DIVERSIFIED OIL & GAS, LLC
		
	By:	 	 
	Name:
	Title:
	
	The following parties join this document solely for the purpose of consenting to this partial assignment of the Operating Agreement:
	
	ATLAS RESOURCES SERIES 28-2010 L.P.
	
	 By: Atlas Resources, LLC,
 a
Pennsylvania limited liability company

		
	By:	 	 
	Name:
	Title:
	
	DGOC SERIES 28, L.P.
	
	 By: DGOC Partnership Holdings II, LLC,

a Delaware limited liability company

		
	By:	 	 
	Name:
	Title:

 Exhibit A 

See the Drilling and Operating Agreement for Atlas Resources Series 28-2010 L.P. (incorporated by reference to Exhibit 10.1 to the Form 10-12G Registration
Statement of Atlas Resources Series 28-2010 L.P. dated April 29, 2011, as amended).

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