An owner's guide to mineral rights on the Conroe Field Unit — operated by Highmark Energy Operating on the Conroe field in East Texas Gulf Coast.
Quick answer
Old wells: 50
Oldest spud: 1932 (94+ years of production)
Recent monthly oil production: 44,547 bbl (Feb 2026)
The Conroe Field Unit is one of the most active long-tenured oil units in East Texas Gulf Coast. With 50 historic wells, an oldest spud date of 1932, and recent monthly production of 44,547 barrels of oil (February 2026), the unit demonstrates the long-tail production profile that characterizes mature unitized oil operations in the Texas Gulf Coast salt-dome trend.
Highmark Energy Operating runs the Conroe Field Unit, the modern unitization of the historic Conroe Oilfield discovered by George Strake in 1931.
The Conroe field sits in the Texas Gulf Coast salt-dome trend. The field has been producing oil since 1932 — a continuous production history spanning 94+ years. Modern operating consolidation under the Conroe Field Unit framework has stabilized field-level production through pressure maintenance, waterflood, and (where applicable) CO2 enhanced oil recovery (EOR) operations.
For broader context on the Texas Gulf Coast salt-dome trend producing region, see our Texas Gulf Coast salt-dome trend mineral rights guide.
Mineral interests in the Conroe Field Unit typically take one of these forms:
Producing royalty interest — your tract's contribution to the unit's monthly revenue, paid by the operator
Non-producing mineral interest — fee mineral ownership in a tract currently outside active producing zones
Overriding royalty interest (ORRI) — a royalty carved out of a working interest
Non-participating royalty interest (NPRI) — a royalty interest with no leasing or development rights
Many Conroe Field Unit interests are inherited multiple generations deep, with original lease bonus paid in the 1930s-1960s era. Current Conroe Field Unit mineral owners frequently include heirs spread across multiple states.
Direct buyers value Conroe Field Unit mineral interests using a discounted cash flow approach with these key inputs:
Decline rate — slow, typical of long-life unitized waterflood / EOR wells
Remaining reserve life — long on actively-maintained units
Operator quality — well-maintained units (Highmark Energy Operating is established in East Texas Gulf Coast) typically deliver predictable production
EOR upside — many Texas Gulf Coast salt-dome trend units have CO2 EOR or other tertiary recovery upside not reflected in current production rates
Discount rate — market-based, reflecting stable unitized cash flows
Buckhead Energy buys mineral rights and royalty interests on the Conroe Field Unit. Out-of-state owners are common — many interests are inherited multiple generations deep. We handle the entire process remotely: free written offer by email, deed signed before a notary in your state, recorded with the Montgomery County clerk, and proceeds paid by check or wire once the deed is recorded.
Buckhead provides a free written offer. Our offer comes at no cost and no obligation.
Start Your Free Written OfferGet a fair offer from a direct buyer with 20 years in business.
Sell My Mineral RightsHighmark Energy Operating runs both the Conroe Field Unit (Montgomery Co., TX) and the Tinsley Field (Yazoo Co., MS) — making it one of the few operators with marquee mature-asset positions in both Texas and Mississippi:
Tinsley Field Unit (Yazoo Co., MS) — Highmark's Mississippi position
Highmark Energy Multi-State Operations — overview
Buckhead Energy buys mineral and royalty interests across all 50 states and has completed acquisitions in 33 states. Buckhead Energy is a direct buyer, not a broker — we purchase mineral and royalty interests with our own capital. Buckhead Energy has been buying mineral and royalty interests since 2006. Buckhead Energy holds an A+ rating with the Better Business Bureau.
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