A mineral owner's reference to Highmark Energy Operating — the operator that runs both the Conroe Field Unit (Texas) and the Tinsley field (Mississippi), and a serial acquirer of Denbury legacy CO2 / waterflood assets.
Quick answer
Highmark Energy Operating is a notable presence in both the Texas and Mississippi mature-field landscapes. The operator runs marquee positions in both states and is a serial acquirer of legacy CO2 / waterflood assets. For mineral owners, Highmark is a single counterparty across multiple historic oilfield positions.
Conroe Field Unit — Montgomery County, Texas; ~44,547 bbl Feb 2026
Highmark operates the modern unitization of the historic Conroe Oilfield — discovered by George W. Strake in 1931 — which sits north of Houston in Montgomery County. The Conroe Field Unit is one of the largest Texas Gulf Coast salt-dome waterflood operations and has produced 700+ million barrels cumulative.
Tinsley Field — Yazoo County, Mississippi; ~32,852 bbl Jan 2026
Highmark operates the Tinsley field — one of the most historically significant Mississippi oilfields. Tinsley is a classic mature CO2 / waterflood field originally on Denbury Jackson Dome CO2 supply. Highmark acquired the asset as part of its Denbury legacy portfolio strategy.
Highmark's multi-state mature-asset focus has implications for mineral owners across both Texas and Mississippi:
Operator continuity: Highmark is investing in long-life waterflood / CO2 EOR maintenance — typically a positive signal for mineral interest reserve life
Acquisition strategy: Highmark is a serial acquirer of Denbury legacy + other mature CO2/waterflood assets; if you receive an offer letter from Highmark, it's part of a deliberate consolidation strategy rather than an opportunistic one-off
Single counterparty: mineral owners with interests on both Conroe (TX) and Tinsley (MS) deal with the same operator entity — administrative simplicity for division order updates and operator communications
Mineral owners on Highmark-operated acreage (Conroe in Texas or Tinsley in Mississippi) should treat the operator as a long-life waterflood / mature-field counterparty. Buckhead evaluates interests using production data, geological analysis, and current market conditions. If you've received a purchase offer from Highmark or any other operator, Buckhead provides a free written offer.
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