Yeso Formation
Permian Basin Leonardian Producer - EIA-Recognized Production Surge Driver
Location
Key Reservoir Properties
Leonardian (Lower Permian, 272-279 Ma)
Interbedded dolostones, limestones, sandstones, shales, and anhydrites deposited on restricted shallow-marine shelf
5,000 - 7,500 ft
8-18%
35.0° API
Executive Summary
The Yeso Formation is one of six formations identified by the U.S. Energy Information Administration as responsible for the surge in Permian Basin crude oil production. This Leonardian-age carbonate and clastic sequence produces from the Drinkard, Tubb, and Blinebry members across the Central Basin Platform and Northwest Shelf of New Mexico and West Texas.
- EIA-Recognized Producer: One of six formations driving Permian Basin production growth alongside Wolfcamp, Spraberry, Bone Spring, Glorieta, and Delaware
- Multiple Productive Members: Drinkard and Blinebry dolostones plus Tubb sandstones provide stacked pay opportunities
- Favorable Depths: Production from 5,000-7,500 feet enables moderate drilling costs
- Light Oil Production: 35 API gravity crude with associated gas production
- Extensive Development: Over 15,000 wells drilled across the productive fairway
- Integration with Other Zones: Often developed alongside Glorieta and San Andres in multi-zone programs
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Historical Background
The Yeso Formation has been a consistent producer on the Permian Basin shelves for decades, with development activity increasing as operators recognized its role in overall basin production.
Early Development: Yeso production was established as operators explored the Northwest Shelf and Central Basin Platform for Permian-age carbonates. The formation's multiple productive members—Drinkard, Tubb, and Blinebry—provided multiple completion targets within individual wellbores.
EIA Recognition: The U.S. Energy Information Administration identified the Yeso as one of six low-permeability formations responsible for the surge in Permian Basin crude oil production, alongside the Spraberry, Wolfcamp, Bone Spring, Glorieta, and Delaware formations.
Modern Development: Today, operators typically develop Yeso alongside Glorieta in integrated shallow Permian programs, maximizing infrastructure utilization while accessing multiple productive intervals.
Geological Characteristics
The Yeso Formation comprises a Leonardian (Early Permian) sequence of interbedded carbonates, clastics, and evaporites deposited on a restricted shallow-marine shelf.
Depositional Environment
Yeso sediments accumulated in restricted shallow-marine and tidal flat environments characterized by episodic variations in water depth and salinity. The resulting deposits include dolostones, limestones, sandstones, and evaporites reflecting the complex depositional setting.
Productive Members
The formation produces from three primary members: Drinkard and Blinebry reservoirs are principally dolostones and limestones, while Tubb reservoirs are principally sandstones. This lithologic diversity creates multiple reservoir types within a single stratigraphic interval.
Trap Configuration
Most traps are formed by anticlines, but some are formed by pinchout of permeable zones on the flanks of structural noses. The dolostone, limestone, and sandstone reservoirs are interbedded with shale and anhydrite that provide sealing capacity.
Regional Distribution
Most Yeso reservoirs lie on the Central Basin Platform in the New Mexico portion of the Permian Basin, with additional production from the southeastern Northwest Shelf.
Reservoir Properties
Yeso reservoir properties vary by member and lithofacies. Carbonate reservoirs in the Drinkard and Blinebry exhibit porosities of 8-18% with permeabilities of 5-100 millidarcies in productive zones. The peritidal carbonate facies create heterogeneous reservoir quality that requires careful geological characterization.
The Tubb sandstone member provides more conventional reservoir properties where developed. Oil gravity averages 35 API with gas-oil ratios of 400-1,000 scf/bbl.
Production History
The Yeso Formation has contributed significantly to Permian Basin production, particularly from the New Mexico portion of the basin. Development peaked in the 1980s but continues today as part of integrated multi-zone programs. Approximately 4,500 active wells produce from Yeso targets.
Drilling & Completion Economics
Yeso development employs conventional drilling and completion techniques, with wells reaching depths of 5,000-7,500 feet. Well costs average approximately $4-5 million depending on completion requirements. The formation's favorable depth enables moderate drilling costs compared to deeper basin targets.
Production Decline Analysis
The Shale Decline Reality
While industry headlines tout record production, the underlying data reveals a critical truth: shale wells experience dramatic production declines that require constant drilling just to maintain output. This creates a "treadmill" effect where massive capital expenditure is needed simply to prevent production collapse.
Industry Expert Analysis
"New wells drilled in 2023 may ultimately produce roughly half of what new wells from 2019 will ultimately produce. The industry is sacrificing future production to maximize short-term output."
— Art Berman, Petroleum Geologist (40+ years experience)The Lateral Length Paradox
Since 2014, the industry has nearly tripled average lateral lengths from 5,000 ft to 14,000+ ft. While this increases initial production rates, it also accelerates decline—effectively using "wider straws" to drain reservoirs faster.
Tier 1 Inventory Depletion
The Permian Basin has now developed nearly 60% of its Tier 1 acreage. Based on current drilling activity, the average publicly traded Permian company will run out of Tier 1 drilling locations within 3.7 years.
What This Means:
- 80% of remaining Tier 1 locations are held by companies with >$30B market cap
- Acquiring 500-1,000 Tier 1 locations costs $3-10 billion
- 85% of new wells are now "children" drilled near existing wells, producing 5-20% less than expected
- Pioneer CEO Scott Sheffield confirmed companies are now looking at Tier 2 and Tier 3 locations
Declining Well Productivity (EUR)
Estimated Ultimate Recovery (EUR) per well has been declining since 2019. According to petroleum geologist Art Berman, Bakken EUR dropped approximately 50% from 2020 to 2023.
Key Investment Considerations
Decline Risks
- Hyperbolic Decline: 65-75% production loss in year 1 (vs 5-6% for conventional)
- Child Well Problem: 85% of new wells produce less than expected
- Inventory Exhaustion: Tier 1 acreage running out within 3-5 years
- Treadmill Economics: Continuous drilling required just to maintain output
Counter-Perspectives
- Technology continues improving operational efficiency
- Infill drilling potential may extend productive life
- Multi-zone development can maximize recovery
- Higher commodity prices improve economics on marginal wells
Decline Analysis Data Sources
- IEA - International Energy Agency, "The Implications of Oil and Gas Field Decline Rates" (2024)
- EIA - U.S. Energy Information Administration, Production Decline Curve Analysis
- SPE/JPT - Society of Petroleum Engineers, "Shale Wells Producing More Early On, Then Declining Faster Than Ever"
- Art Berman - Petroleum Geologist, artberman.com - Shale decline analysis
- David Hughes - Geoscientist, Post Carbon Institute - Shale production studies
- Goehring & Rozencwajg - Natural Resource Investors, Permian Basin analysis
- Novi Labs - Delaware Basin and shale well performance data
Economic Analysis
Yeso economics benefit from moderate drilling depths and integration with other Permian zones. With breakeven prices around $38/bbl WTI, development remains attractive across typical commodity price ranges. Multi-zone completion programs improve full-cycle returns by spreading infrastructure costs.
Remaining Potential & Future Opportunities
The Yeso Formation retains development potential across the Permian Basin shelves. Integration with deeper Wolfcamp and shallower Glorieta/San Andres targets provides continued development opportunity for operators with established positions.
Conclusion
The Yeso Formation stands as an EIA-recognized driver of Permian Basin production growth, with its multiple productive members providing stacked pay opportunities across the Central Basin Platform and Northwest Shelf. For operators with established Permian positions, the Yeso offers proven conventional production with attractive economics.
Data Sources & References
- U.S. Energy Information Administration - "Six formations responsible for surge in Permian Basin crude oil production"
- Permian Basin Petroleum Association - Yeso Play overview and production data
- New Mexico Bureau of Geology - Yeso Formation geological descriptions
- Bureau of Economic Geology, University of Texas - Permian Basin reservoir studies
- Pruitt, Sean - Owner, Kingdom Exploration
Important Disclaimer
This geological review is provided for educational and informational purposes only. The author, Sean Pruitt, is not a licensed geologist. Information presented here has been compiled from publicly available sources including USGS reports, state geological surveys, academic publications, and industry data. Reservoir properties and production data represent ranges observed across productive areas and may vary significantly by location. Kingdom Exploration makes no representations or warranties regarding the accuracy, completeness, or reliability of this information for any specific purpose. This content does not constitute investment advice, geological consulting, or professional engineering recommendations. Investors and operators should conduct their own due diligence and consult qualified licensed professionals including petroleum geologists, reservoir engineers, and financial advisors before making any investment or operational decisions.
