Background

Robert Leon Oliver and other royalty owners sued Devon Energy Production Company, L.P. and BPX over royalty valuation disputes arising from oil and gas leases. The trial court entered a $15.8 million judgment in favor of the royalty owners after a jury valued royalties at a downstream point—the Houston Ship Channel—rather than at the wellhead. Devon and BPX appealed, challenging the trial court's interpretation of the lease's royalty valuation provisions.

The Lease Language and Legal Issue

The central dispute turned on interpreting lease language that valued royalties 'at the wells as of the day it is run to the pipe line or storage tanks.' The leases also contained post-production cost addenda that addressed deductions for transportation and processing expenses. The royalty owners argued that these addenda modified the at-the-well language and entitled them to valuation at the Houston Ship Channel point of sale. Devon and BPX contended that the at-the-well language established the valuation point under Texas Supreme Court precedent in Heritage Resources, making the addenda surplusage that could not override the express valuation point.

The Court's Analysis

The Corpus Christi Court of Appeals reversed, holding that the lease's explicit at-the-well valuation language controlled under Heritage Resources. The court determined that when a lease establishes a clear valuation point 'at the wells,' that language governs the royalty calculation and requires application of market value at the well. The court ruled that the post-production cost addenda were mere surplusage—they could not transform an at-the-well valuation into a downstream point-of-sale valuation. By allowing the jury to value royalties at the Houston Ship Channel, the trial court had committed reversible error by effectively rewriting the parties' bargain and ignoring the lease's express valuation point.

Implications for Royalty Valuation Disputes

This decision reinforces the primacy of express at-the-well valuation language in Texas oil and gas leases following Heritage Resources. Operators facing royalty litigation should scrutinize lease language for explicit valuation points, as courts will enforce 'at the wells' provisions even when the leases contain addenda addressing post-production costs. The ruling confirms that trial courts cannot allow juries to adopt downstream valuation points when lease language establishes wellhead valuation. For royalty owners, the decision demonstrates the difficulty of overcoming express at-the-well language through addenda that address post-production costs. The $15.8 million reversal illustrates the significant financial stakes involved in royalty valuation point disputes.