The Wolfcamp D doesn’t get the headline treatment its shallower siblings do, but the development footprint tells a different story. Across WDB header records, 16,598 wells now penetrate the Wolfcamp D, drilled by 553 operators and totaling 21,121,856 feet of lateral — roughly 4,000 miles. That installed base sits almost entirely in the Midland Basin core, and the operator concentration at the top is sharper than most outside observers assume. This post maps who is drilling the Wolfcamp D, where the permit pace is now, and what the structure of the operator list signals about how this bench gets developed from here.
A Midland Basin Bench, Concentrated in Five Counties
The Wolfcamp D is a Texas story. The five counties carrying the bulk of the 16,598-well count — Martin, Glasscock, Midland, Andrews, and Howard — sit inside RRC District 8 and form the geographic spine of Midland Basin development. Operators chasing the D are doing so where the full Wolfcamp section is thickest and where existing pad infrastructure, takeaway, and water handling are already built out for stacked-pay programs.
The 21.1 million feet of cumulative lateral implies an average drilled length around 1,273 feet per well across the dataset — a number weighted down by older verticals and short laterals that pre-date the modern long-lateral era. Recent activity is almost exclusively long-lateral, but the legacy footprint is part of why the Wolfcamp D well count looks larger than the public-facing rig narrative suggests. For operators benchmarking entry points, the Wolfcamp D formation page tracks the county-level distribution in detail.
Top Ten Operators Hold the Majority of the Wellbore Count
The Wolfcamp D operator list has 553 names on it, but the top ten do most of the work. Diamondback Energy leads with 2,972 wells, followed by Pioneer Natural Resources at 1,448, COG Operating at 1,057, Apache at 1,045, and Ovintiv USA at 993. Diamondback and Pioneer alone account for 4,420 wells — about 27% of every Wolfcamp D wellbore on record.
Extending to the top ten — Diamondback, Pioneer, COG, Apache, Ovintiv, Fasken Oil and Ranch (833), OxyRock Operating (711), New Height Energy (664), Crescent Energy Operating (649), and Oxy (487) — the cumulative count reaches 10,859 wells, or roughly 65% of the formation’s installed base. The remaining 543 operators split the other 5,739 wells, which is the long tail you would expect in a mature, post-consolidation Permian bench.
Two structural points worth flagging:
- The Diamondback–Pioneer combined position reflects the post-merger reality of the Midland Basin — these two names increasingly represent overlapping inventory.
- Fasken Oil and Ranch at 833 wells is a private operator running a deep Wolfcamp D program inside its legacy ranch position, and is one of the larger non-public holders on the list.
Permit Pace: 388 Filings in 24 Months Against a 16,598-Well Base
The forward-looking number is the one that should get attention. Only 388 Wolfcamp D permits have been filed in the last 24 months, against an installed base of 16,598 wells. That is a permit-to-existing-well ratio of roughly 2.3% over two years — a measured pace relative to how aggressively this bench was developed in prior cycles.
A few interpretations are consistent with that number:
- The Wolfcamp D is being treated as a co-development target rather than a standalone primary target on most pads, meaning permits often surface under Wolfcamp A or B designations even when the D is part of the program.
- The largest holders — Diamondback, Pioneer, COG, Apache, Ovintiv — are pacing capital across multiple Wolfcamp benches and the Spraberry, not maximizing D-specific filings.
- Inventory in the top-tier Martin/Midland/Glasscock fairway is being managed for longevity, not throughput.
For operators tracking competitor activity at the bench level, the Texas formations directory aggregates permit and well-count data across the full Permian stack so the D can be read in context with its neighbors rather than in isolation.
What the Operator Structure Signals for Capital Allocation
The shape of the Wolfcamp D operator list — five operators above 1,000 wells, a cluster of mid-size privates between 480 and 850 wells, and a long tail of 543 smaller names — mirrors the broader Permian post-2024 consolidation pattern. The publicly traded majors at the top are running disciplined, return-focused programs. The mid-tier privates (Fasken, OxyRock, New Height, Crescent) are positioned to either continue running standalone development or become acquisition targets as the next wave of Permian M&A plays out.
For capital allocators and industry watchers, the takeaway is that Wolfcamp D inventory is increasingly held by operators with the balance sheet to drill it slowly. The 388-permit pace is not a sign of declining interest — it’s a sign of who owns the rock now. When a bench’s top two holders control 27% of the wellbore count and the top ten control 65%, the development cadence is set in a handful of capital-budget meetings, not at the basin level.
Valor builds operator-level intelligence across every major Texas and Oklahoma bench, including formation-by-formation permit, well-count, and lateral-length data. For teams modeling Permian inventory, M&A targets, or competitor pace, our Texas formations directory is the right place to start.
Key Takeaways
- Track Diamondback, Pioneer, COG, Apache, and Ovintiv as the bellwethers - they hold over 7,500 of the 16,598 Wolfcamp D wells.
- Model Wolfcamp D as a co-development bench, not a standalone program, given the 388-permit 24-month pace.
- Cross-reference Wolfcamp D permits against Wolfcamp A/B and Spraberry filings on the same pads to capture true bench-level activity.
- Read the 388-permit pace as a sign of who owns the rock, not declining interest - operators with the balance sheet to drill slowly are in control of this bench.
- Track mid-tier privates - Fasken, OxyRock, New Height, and Crescent, as the most likely sources of M&A flow as the next wave of Permian consolidation plays out.
