Common Contracts

Purchase and Sale Agreement Dated as of May 25, 2017 Among

Purchase and Sale Agreement • January 12th, 2018 • Carbon Natural Gas Co • Crude petroleum & natural gas • Texas

• Contract Type
  Purchase and Sale Agreement
• Filed
  January 12th, 2018
• Company
  Carbon Natural Gas Co
• Industry
  Crude petroleum & natural gas
• Jurisdiction
  Texas

This Purchase and Sale Agreement (this “Agreement”), dated May 25, 2017 (the “Execution Date”), is among ENERVEST ENERGY INSTITUTIONAL FUND XII-A, L.P., a Delaware limited partnership, whose mailing address is 1001 Fannin Street, Suite 800, Houston, Texas 77002, ENERVEST ENERGY INSTITUTIONAL FUND XII-WIB, L.P., a Delaware limited partnership, whose mailing address is 1001 Fannin Street, Suite 800, Houston, Texas 77002, and ENERVEST ENERGY INSTITUTIONAL FUND XII-WIC, L.P., a Delaware limited partnership, whose mailing address is 1001 Fannin Street, Suite 800, Houston, Texas 77002, and for the limited purposes as provided herein, ENERVEST OPERATING, L.L.C., a Delaware limited liability company (the “Operator”), whose mailing address is 1001 Fannin Street, Suite 800, Houston, Texas 77002 (collectively, “Seller” and each singly, a “Seller Party”); and Carbon West Virginia Company, LLC, a Delaware limited liability company, whose address is 1700 Broadway, Suite 1170, Denver, Colorado 80290

Portions of this document have been omitted as marked and filed separately with the Commission. Purchase and Sale Agreement Dated as of May 25, 2017 Among and as Seller and Carbon West Virginia Company, LLC as Buyer

Purchase and Sale Agreement • November 14th, 2017 • Carbon Natural Gas Co • Crude petroleum & natural gas • Texas

• Contract Type
  Purchase and Sale Agreement
• Filed
  November 14th, 2017
• Company
  Carbon Natural Gas Co
• Industry
  Crude petroleum & natural gas
• Jurisdiction
  Texas

This Purchase and Sale Agreement (this “Agreement”), dated May 25, 2017 (the “Execution Date”), is among (■) a Delaware limited partnership, whose mailing address is (■), (■), a Delaware limited partnership, whose mailing address is (■), and (■), a Delaware limited partnership, whose mailing address is (■), and for the limited purposes as provided herein, (■), a Delaware limited liability company (the “Operator”), whose mailing address is (■) (collectively, “Seller” and each singly, a “Seller Party”); and Carbon West Virginia Company, LLC, a Delaware limited liability company, whose address is 1700 Broadway, Suite 1170, Denver, Colorado 80290 (“Buyer”). Buyer and Seller are sometimes individually referred to herein as a “Party” and collectively referred to herein as the “Parties.”