WESTERN HAYNESVILLE
The "Western Haynesville" is a quickly evolving play based on the deep Haynesville and Bossier geological formations. Comstock Resources was the early mover and Aethon has followed suit. Both companies have built large leasehold positions and drilled impressive wells. Other major unconventional O&G companies are joining them as the play area expands. Mitsui E&P USA has built a large position and Expand (Chesapeake) is heavily rumored to be leasing. There may be more major operators chasing this trend via the multiple brokerage firms that are active in the eastern expansion of the trend. The play area originally was comprised of Leon, Roberston and Freestone counties as the focus for early drilling. Leasing operations and "trend subsurface work" has seen the play expand to include Houston, Anderson, Cherokee and Nacogdoches counties. The eastward expansion to Nacogdoches County now almost connects the western trend to the original Haynesville Shale fairway. The prospective section in this trend ranges from 2000' to over 4000' thick, and the opportunity for multiple target intervals is highly probable based on some stacked lateral efforts by Comstock. The play is deep, hot and over pressured making it an expensive and challenging trend to drill, fracture stimulate and produce.
Adamas Energy LLC...Mitsubishi's Replacement For Aethon
I noticed today that two Aethon drilling permits in Texas had been amended to change the operator to Adamas Energy LLC. I checked around for more info, and grok gave me the most complete answer:
Adamas Energy LLC appears to be a relatively new entity in the energy sector, established as a wholly owned subsidiary of Mitsubishi Corporation (a major Japanese trading house).
It was created following Mitsubishi's acquisition of natural gas and pipeline assets from Aethon Energy Management LLC (a Dallas-based company active in the Haynesville shale basin). The deal was announced in mid-January 2026, with Mitsubishi paying approximately $5.2 billion in cash and assuming about $2.33 billion in debt, for a total enterprise value around $7.5 billion. This marks one of the largest investments by a Japanese company in the U.S. shale gas sector.
Key details:
- The assets are primarily in the Haynesville Shale formation, spanning eastern Texas and northern Louisiana.
- They produce roughly 2.1 billion cubic feet per day (Bcf/d) of natural gas — equivalent to about 15 million tons per year of LNG potential.
- The location is strategic due to proximity to U.S. Gulf Coast LNG export facilities, strengthening Mitsubishi's position in global liquefied natural gas markets (where it already has stakes, like in Cameron LNG).
- Gordon Huddleston (son of Aethon founder Albert Huddleston) is set to serve as CEO of Adamas Energy.
- Aethon retained an option to buy back up to 25% of certain upstream and midstream assets.
- The transaction gives Mitsubishi full involvement in the U.S. shale gas value chain, from production to domestic sales and exports.
Rock Man
Great post - interesting to see the 25% buy back option.
This goes hand in hand with earlier rumors that some Aethon people were going to form their own company.
Feb 19