Highmark Energy Operating — Texas & Mississippi Mature-Asset Operations

A Multi-State Mature-Asset Operator

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.

Highmark Texas Position

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.

Highmark Mississippi Position

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.

Why Highmark Matters to Mineral Owners

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

If Highmark Operates Your Acreage

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. Valuations use standard DCF with 8-12% discount rates and 15-30+ year reserve lives. If you've received a purchase offer from Highmark or any other operator, get a free written second opinion.

Get a Free Valuation in Either State

Buckhead Energy buys mineral rights and royalty interests across both Highmark-operated mature-field positions and the broader Texas / Mississippi mature-field landscapes.