The Dune Field in Crane County, Texas, discovered in 1938, is a Grayburg–San Andres giant developed with roughly 900 vertical wells on the eastern margin of the Central Basin Platform, much of it on University Lands acreage that funds Texas higher education. Dune sits in the middle of the famous McElroy–Dune–Waddell–Jordan–Penwell trend, where the USGS has estimated some 900 million barrels of mobile oil remain unrecovered. For mineral and royalty owners, Dune is quintessential flood country: dense wells, unitized operations, and a decline curve measured in decades.
Source: Texas Railroad Commission production filings, aggregated across RRC field designations 26538001. Reported volumes lag the calendar by several months.
Dune was discovered in 1938, a decade after the first Crane County giants, as development stepped outward across the shallow Grayburg trend between McElroy and Waddell. Drilling accelerated through the 1940s on close spacing, ultimately placing around 900 conventional vertical wells across the field. Because much of the acreage belongs to University Lands, Dune’s royalties have flowed for generations into the Permanent University Fund alongside the private interests in and around the field.
Pressure depletion pushed the field into secondary recovery in the post-war era, and Dune’s leases and units became part of the great wave of Grayburg–San Andres waterflooding that swept the eastern platform through the 1950s and 1960s. Injection restored reservoir energy and stabilized output, establishing the pattern-flood framework that has governed the field’s operations — and its royalty accounting — ever since.
In the modern era Dune has drawn sustained scientific attention: the Bureau of Economic Geology published a landmark characterization of the Grayburg reservoir at the University Lands Dune Field in the late 1980s, and federal resource assessments count the field within a trend still holding hundreds of millions of barrels of recoverable mobile oil. Operations have consolidated among mature-asset specialists, with the flood continuing to produce more than eighty-five years after discovery.
Dune produces from the Grayburg and San Andres dolomites at shallow depths along the eastern edge of the Central Basin Platform. The reservoir consists of cyclic, shallow-marine carbonate and siliciclastic layers whose permeability contrasts strand oil between wells — the Bureau of Economic Geology’s Dune studies became standard references on exactly this problem. The practical consequence is favorable for longevity: large original oil in place, modest recovery to date, and rock that continues to respond to disciplined pattern flooding and targeted infill work.
Dune’s story is the waterflood era in miniature: primary depletion through the 1940s, unitized injection from the post-war decades onward, and a long managed plateau since. Resource assessments of the McElroy–Dune–Waddell trend point to roughly 900 million barrels of unrecovered mobile oil, which is why this stretch of Crane County has remained a focus for recovery investment rather than abandonment. For royalty owners, an actively flooded field inside a proven EOR fairway offers the prospect of production — and royalty income — extending far beyond what raw well age would suggest.
A Dune-area interest is a stake in dense, unitized, flood-supported production with a documented base of remaining oil. Interests here often date to mid-century leases and have passed through multiple estates, leaving owners with fractional decimals and limited visibility into unit performance. Because flooded Grayburg production declines slowly, quick-sale pricing based on a handful of checks tends to undervalue these assets. We buy minerals and royalties in Crane County and provide free written offers.
County-level well data, production charts, and selling guides for the counties this field spans:
Yes. Dune has produced since 1938 and remains an active waterflooded field with hundreds of wells, situated in a trend the USGS credits with large volumes of remaining recoverable oil.
The field was developed under major-company leases, much of it on University Lands, and its mature units have consolidated over time among operators specializing in legacy Permian floods. Your check stub or division order identifies your current operator.
Value turns on your decimal, current unit production, and the shallow declines typical of Grayburg waterfloods — plus the field’s documented remaining-oil upside. Request a free written offer to see a valuation built on those fundamentals.