November 12, 2020 

HOUSTON--(BUSINESS WIRE)--Massif Oil & Gas II, LLC (“Massif II”) is pleased to announce it has partnered with NGP to form Massif II. Massif II will leverage its proprietary relationships and operational expertise to acquire and develop top-tier oil-weighted assets in the Powder River Basin. 

The Bozeman, Montana based team is led by Barrett Frizzell (CEO), Adam Gollofon, (COO), Scott Sheehan (CFO), Brian Burdette (EVP, Subsurface) and Dave Thornquist (EVP, Land). Massif II’s management team previously served in the same roles at Massif Oil & Gas I.

Barrett Frizzell, CEO, commented, “Following our success in the Powder River Basin, we are excited to partner with NGP to build a company focused on creating significant value for its partners. The Massif II team believes our acquisition and development expertise, along with strong equity backing, will enable us to create value in today’s dynamic environment. The financial commitment and investment experience of NGP will enable us to pursue, develop and optimize proven oil and gas assets with a returns-driven focus.”

“NGP is excited and grateful to partner with Massif II, and our equity commitment reflects the confidence we have in their business plan,” said Patrick McWilliams, Partner at NGP. “We are thrilled to work with such an energetic, disciplined and skilled company and welcome them to the NGP family. With the management team’s strong historical track record in the Powder River Basin, technical skillset and industry relationships, we believe the company is well positioned to capitalize on the current market environment.”

About NGP

Founded in 1988, NGP is a premier private equity firm in the natural resources industry with approximately $20 billion of cumulative equity commitments organized to make strategic investments in the energy and natural resources sectors. For more information about NGP, please visit

April 4, 2017 



December 15, 2016 

Massif Oil & Gas /MCL 1 Oil and Gas Wyoming completed its second horizontal Turner well, Castle 2-41 TH, in February 2017.  The well had a similar completion to the Chimney Cone 34-34 TH and produced a peak IP30 of 1,034 BOEPD (86% liquids) out of a 4,171’ horizontal lateral.  In March 2017, Massif kicked off a five-well spring drilling campaign to further delineate the Turner and test the Parkman in the Northeast Extension of both plays.  The first well of that campaign (Chimney Cone 22-41 TH) set a new company record of 11 days from spud to rig-release.  This drilling record is approximately 25% faster than the two horizontals drilled in 2016.

September 8, 2017 

April 26, 2017 

Effective May 31, 2020, Massif Oil & Gas II, LLC assets, and all associated NGP-backed subsidiaries (including Massif Operating LLC) have been merged into Rebellion Energy II.  The Massif team wishes both Rebellion Energy II and NGP continued success in the Powder River Basin with the inclusion of these assets.

With a successful track record of creating value for stakeholders via operational excellence, the Bozeman, Montana based Massif team is excited to pursue its next venture (Massif III) with a continued Rockies focus. 

October 6, 2015

Massif Oil & Gas /MCL 1 Oil and Gas Wyoming set a Powder River Basin operational record while drilling its Castle 3-31 PH Parkman Horizontal.  The Castle 3-31PH was the first single-trip Parkman monobore in the basin with a spud-to-rig-release of 6.4 days.   

November 8, 2018 

Massif Oil & Gas / MCL 1 Oil and Gas Wyoming recently acquired 3,300 net acres near the Hilight field in the Powder River Basin of Wyoming, increasing the Company’s net acreage position to 55,000 acres.  Additionally, the Company drilled and completed five horizontal wells in 2017.  Operational highlights include:

Massif Oil and Gas/MCL 1 Oil and Gas Wyoming drilled & completed the Chimney Cone 34-34 TH, its first Turner horizontal test in Campbell County Wyoming.  The peak IP30 (average peak month production) for the well was 992 BOEPD (89% liquids) out of a 4,023’ horizontal lateral. 

Massif Oil & Gas announces the formation of a joint venture with a private global institutional alternative investment firm.  The strategic focus of the venture is to acquire and exploit low-risk, proven, operated, oil and natural gas assets with economic drilling opportunities.  Massif’s founders have over 60 years of combined oil and gas experience and a track record of success across the E&P life cycle.  The cornerstone asset of the joint venture is the Hilight Field in the Powder River Basin (“PBR”).  In the  PBR Massif operates under the name of MCL 1 Oil & Gas Wyoming.  At acquisition, the Hilight field produced approximately 1,650 net BOEPD and consists of approximately 48,000 net acres that is 100% held by production.  Horizontal drilling opportunities have been identified in nine stacked reservoirs across the acreage block.  

  • Completed a five-well drilling campaign in 68 days, averaging 12.5 days from spud to rig-release and 79 days from spud to first-sales.
  • Zero lost time incidents among our employees and contractors.
  • First 160-acre Turner spacing test shows no apparent interwell communication and strong peak IP30s.  The Chimney Cone 35-41 TH has a completed lateral length of 4,411’ and produced 902 BOEPD (88% liquids) while the Chimney Cone 36-11 TH has a completed lateral length of 4,425’ and produced 943 BOEPD (89% liquids).
  • Completion of the Powder River Basin’s Easternmost Parkman test (Castle 3-31 PH) proving Parkman commerciality in the Hilight Field.
  • Company net daily production hit a daily record of approximately 4,000 BOEPD (63% Liquids).