Document:

EX-10.18

 EXHIBIT 10.18 

FIRST AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT 

THIS FIRST AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT (this “First Amendment”) is made by and between SWEPI LP
(“Shipper”) and CENTERPOINT ENERGY FIELD SERVICES, INC. (“Gatherer”) effective this 21st day of September, 2010. 

Gatherer and Shipper are parties to that certain Gas Gathering and Treating Agreement dated April 29, 2010 (the “Agreement”);

 The table entitled “Initial Build Schedule” on Exhibit “D” to the Agreement provides that Gatherer will complete
construction and make operational the “Compression at Chatman” on or before September 30, 2010; and The parties have agreed to suspend Gatherer’s obligation to construct and make operational the Compression at Chatman by
September 30, 2010 until a date that the parties may mutually determine in the future. 
 NOW, THEREFORE, for adequate consideration
received and acknowledged, the parties hereto agree as follows: 
  

	1.	The parties hereby replace “September 30, 2010” with “to be mutually agreed” in the Initial Build Schedule on Exhibit D of the Agreement as the “Estimated Operational Date” for the
Compression at Chatman. 

  

	2.	Except as expressly amended hereby, the Agreement remains in effect as originally written. 

 IN
WITNESS WHEREOF, this First Amendment to Gas Gathering and Treating Agreement is executed as of the 21st day of September, 2010. 

 

									
	 Shipper:
 SWEPI LP
	 		 	 Gatherer:
 Centerpoint Energy Field
Services, Inc.

					
	By:	 	 /s/ Stephen Friedman
	 		 	By:	 	 /s/ William H. May, Jr.

	Name:	 	Stephen Friedman	 		 	Name:	 	William H. May, Jr.
	Title:	 	Attorney-In-Fact	 		 	Title:	 	Sr. V.P.EX-10.19

 EXHIBIT 10.19 

SECOND AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT 

THIS SECOND AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT (this “Second Amendment”) is made by and between SWEPI LP
(“Shipper”) and CENTERPOINT ENERGY FIELD SERVICES, LLC, successor by conversion to Centerpoint Energy Field Services, Inc. (“Gatherer”) effective the 29th day of November,
2010. 
 Gatherer and Shipper are parties to that certain Gas Gathering and Treating Agreement dated April 29, 2010, as amended by the
First Amendment dated September 1, 2010 (as so amended, the “Agreement”); 
 The table entitled “Initial Build
Schedule” on Exhibit “D” to the Agreement provides that Gatherer will complete construction of a “Gulf South Legacy Tap” on or before November 30, 2010; and The parties have agreed to suspend Gatherer’s obligation
to construct the Gulf South Legacy Tap (also referred to as “Robeline Interconnect into Gulf South Pipeline” in Section 5.7 of the Agreement) by November 30, 2010 until a date that the parties may mutually determine in the
future. 
 NOW, THEREFORE, for adequate consideration received and acknowledged, the parties hereto agree as follows: 

 

	1.	The parties hereby replace “November 30, 2010” with “to be mutually agreed” in the Initial Build Schedule on Exhibit D of the Agreement as the “Estimated Operational Date” for the Gulf
South Legacy Tap. 

  

	2.	Except as expressly amended hereby, the Agreement and First Amendment remain in effect as originally written. 

IN WITNESS WHEREOF.., this Second Amendment to Gas Gathering and Treating Agreement is
executed as of the 29th day of March, 2011. 
  

									
	 Shipper:
 SWEPI LP
	 		 	 Gatherer:
 Centerpoint Energy Field
Services, LLC

					
	By:	 	 /s/ Stephen Friedman
	 		 	By:	 	 /s/ William H. May, Jr.

	Name:	 	Stephen Friedman	 		 	Name:	 	William H. May, Jr.
	Title:	 	Attorney-In-Fact	 		 	Title:	 	Sr. V.P. & Chief Commercial OfficerEX-10.20

 EXHIBIT 10.20 

THIRD AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT 

THIS THIRD AMENDMENT TO GAS GATHERING AND TREATING AGREEMENT (this “Third Amendment”) is made by and between SWEPI LP
(“Shipper”) and CENTERPOINT ENERGY FIELD SERVICES, LLC, successor by conversion to CenterPoint Energy Field Services, Inc. (“Gatherer”) effective this 10th day of March, 2011
(the “Effective Date”). 
 Gatherer and Shipper are parties to that certain Gas Gathering and Treating Agreement dated May 1,
2010, as previously amended by the Parties on September 1, 2010 and March 9, 2011 (as so amended, the “Agreement”). Unless defined herein, all capitalized terms herein will have the same meaning as stated in the GGA; 

Prior to the Effective Date, Shipper installed and maintained metering equipment (“Shipper Check Meters”) upstream of
Gatherer’s Measurement Facilities at the Receipt Points. Based upon the information from Shipper Check Meters, Shipper dispatches personnel to physically increase or decrease the flow of Gas on Shipper’s Wells; 

Shipper desires to remove the Shipper Check Meters and install programmable logic controllers (“PLCs”) upstream of Gatherer’s
Measurement Facilities and on Shipper’s flow lines that will incrementally increase or decrease the flow of Gas on Shipper’s Wells. The PLCs will require Gatherer to transmit certain volumetric information from its Measurement Facilities
to the PLCs from which the PLCs will control Gas flow; and Gatherer is willing to provide the volumetric information to Shipper’s PLCs, provided Shipper indemnifies and releases Gatherer from all liability from Shipper’s installation,
operation, repair, replacement, maintenance and removal of the PLCs, and for the accuracy, completeness, or consistency of the information provided by Gatherer, as further provided herein. 

The parties now desire to amend the GGA as set forth herein. 

NOW, THEREFORE, for adequate consideration received and acknowledged, the parties hereto agree as follows: 

 

	1.	Section 4.4 is added to the GGA: 

 “4.4 Programmable Logic Controllers. 

(a) During the Term, Shipper may install and operate programmable logic controllers (each a “PLC” and collectively
the “PLCs”) upstream of Gatherer’s Measurement Facilities at the Receipt Points: (i) at Shipper’s sole risk and expense; (ii) in a manner that does not interfere with Gatherer’s operations or measurement on each
Well site; and (iii) in compliance with all industry requirements. 

 (b) Gatherer agrees that Shipper may connect the PLCs to the Gatherer’s
Measurement Facilities in order to receive Gatherer’s measurement data from each Well to which the Measurement Facilities are attached. At each Receipt Point where Shipper decides to install a PLC, Shipper will place its PLC at a mutually
agreed location upstream of Gatherer’s Measurement Facilities at the Receipt Point and on Shipper’s flow line. Shipper will connect its PLCs at a time that is mutually convenient for both Parties with a Gatherer representative present.

 (c) Notwithstanding any other provision in this Agreement, Shipper assumes sole responsibility for the condition,
installation, operation, service, repair, construction, replacement and maintenance of the PLCs and for compliance with all local, state and federal laws and regulations applicable to the acquisition, ownership, operation and maintenance thereof.
Shipper agrees to pay, compensate, reimburse, indemnify, and hold harmless Gatherer (and its directors, officers, shareholders, members, employees, agents and representatives) from and against any and all loss of or damage to the extent caused by
Shipper’s PLCs or by Shipper, Shipper’s employees, contractors, or agents in the installation, operation, maintenance, repair, replacement or removal of any and all PLCs. 

(d) Notwithstanding any other provision in this Agreement, Gatherer makes no warranty or representation whatsoever, express,
implied, statutory or otherwise including but not limited to any representation, warranty or covenant with respect to condition quality, or any other representation, warranty or covenant or any kind or character expressed or implied with respect
thereto as to its Measurement Facilities or volumetric information. 
 (e) Notwithstanding any other provision in this
Agreement, Shipper waives and releases Gatherer from, and covenants and agrees to indemnify, defend and hold harmless Gatherer (and its directors, officers, shareholders, members, employees, agents and representatives) from and against any and all
actions, suits, assessments, levies, proceedings, hearings, investigations, charges, complaints, claims, demands, injunctions, judgments, orders, decrees, rulings, damages, injury to or death of any person whomsoever, or loss of or damage to any
property in any way, dues, penalties, fines, costs, amounts paid in settlement, liabilities, environmental damage, regulatory penalty, pollution or contamination, obligations, taxes, liens, losses, expenses, and fees, including court costs and
attorneys’ fees and expenses, and any and all other liability, whether known or unknown, foreseen or unforeseen, existing or future, directly or indirectly resulting from, arising out of, or related to arising out of the ownership, operation,
installation, service, repair, construction, replacement and maintenance of the PLCs, and/or from any release, spill or contamination to air, land, or water arising from or caused by the PLCs. 

(f) Shipper’s responsibility for release, contamination or spill to air, land, or water from the PLCs includes
investigations, monitoring, clean-up, remediation, removal or restoration work that is required by any federal, state or local governmental agency or political subdivision with applicable jurisdiction because
of the presence, suspected presence, release or suspected release to air, soil, surface water, or groundwater on or emanating from a PLC. The performance of any such investigations, monitoring, clean-up,
remediation, removal or restoration work on Gatherer’s property or facilities will be by Gatherer, and in the name of Gatherer, subject to Shipper’s indemnity obligations. For all such work on Gatherer’s property or facilities,
Gatherer will obtain all necessary licenses, manifests, permits and approvals to perform such work. All investigations, monitoring, clean-up, remediation, removal or restoration work and the disposal of all
waste generated by such work by either Party will be in accordance with all applicable Laws. 

  
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 (g) Gatherer is not obligated to produce any daily raw volumetric information
from its Measurement Facilities to the PLCs. However, nothing in this Subsection 4.4 amends Gatherer’s obligations stated elsewhere in this Agreement to provide information, including those obligations under Subsections 8.5 and 9.3. In the
event that Gatherer chooses to produce measurement information to the PLCs, this Agreement does not create a continuing obligation to produce any other information to the PLCs or to update any such information that has been previously produced. All
Gatherer’s measurement information shall belong to and remain the sole property of the Gatherer. Shipper shall acquire no proprietary interest in or right to any of the measurement information received from Gatherer. Shipper acknowledges that
neither Gatherer nor any of its Representatives makes any express or implied representation or warranty as to the condition, quality, accuracy or completeness of any measurement information, and Shipper agrees that none of such persons shall have
any liability to Shipper or any of its Representatives relating to or arising from its or their use of any measurement information or for any errors therein or omissions therefrom. Shipper also agrees that it is not entitled to rely on the accuracy
or completeness of any measurement information. Shipper acknowledges and agrees that the measurement information is being provided solely for the purpose of assisting its PLCs.” 

 

	2.	The GGA, as amended previously and herein remains in full force and effect. 

  
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 IN WITNESS WHEREOF, this Third Amendment to Gas Gathering and Treating Agreement is executed as
of the 10th day of March, 2011. 
  

									
	Shipper:
SWEPI LP	 		 	Gatherer:
Centerpoint Energy Field Services, LLC
					
	By:	 	 /s/ Stephen Friedman
	 		 	By:	 	 /s/ William H. May, Jr.

	 Name:
 Title:
	 	 Stephen Friedman

Attorney-In-Fact
	 		 		 	 William H. May, Jr.

 Senior Vice President
and
 Chief Commercial Officer

  
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