i i i i i i

MEMORANDUM OPINION

No. 04-07-00778-CV

TEXAS INDEPENDENT EXPLORATION, LTD.,

Appellant

v.

PEOPLES ENERGY PRODUCTION–TEXAS L.P. 

n/k/a Coronado Energy E&P Company, L.L.C.,

Appellee

From the 381st Judicial District Court, Starr County, Texas

Trial Court No. DC-03-385

Honorable Jose Luis Garza, Judge Presiding

Opinion by: Steven C. Hilbig, Justice

Sitting: Sandee Bryan Marion, Justice

Steven C. Hilbig, Justice

Marialyn Barnard, Justice

Delivered and Filed: August 31, 2009

AFFIRMED

Peoples Energy Production–Texas L.P. n/k/a Coronado Energy E&P Company, L.L.C.

(“Peoples Energy”) sued Texas Independent Exploration, Ltd. (“Texas Independent”) for declaratory

judgment seeking a favorable construction of an assignment in an oil and gas lease. Texas

Independent counterclaimed seeking its own declaratory judgment. Both parties moved for summary

judgment based on their interpretations of the assignment. The trial court granted Peoples Energy’s
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1... A “farmout agreement” is an assignment by a lease owner of all or part of the lease to another operator who

wants to drill on the lease. Mengden v. Peninsula Prod. Co., 544 S.W.2d 643, 645 n.1 (Tex. 1976); ExxonMobil Corp.

v. Valence Operating Co., 174 S.W.3d 303, 313 (Tex. App.—Houston [1st Dist.] 2005, pet. denied). The primary

characteristic of a farmout agreement is the assignee’s obligation to drill one or more wells on the assigned land as a

prerequisite to the completion of the transfer. Id. 

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motion and denied Texas Independent’s motion. On appeal, Texas Independent contends the trial

court erred in granting Peoples Energy’s motion and denying its motion, arguing the trial court

misconstrued the assignment. We affirm the trial court’s judgment. 

BACKGROUND

In 1937, the First National Bank of Mission conveyed a 346.67 acre lease (“the Lease”) to

Tom Vessels Jr. Vessels later assigned the entire Lease to Sun Oil Company. By 1995, Union

Pacific Oil & Gas Company owned an 80-acre portion of the Lease, which became known as the

Farmout Lease. In 1995, Union Pacific assigned the Farmout Lease to Texas Independent pursuant

to a document entitled “Farmout Agreement.”1 Texas Independent’s interest was limited to the

“Farmout Land,” which was defined in section 1.12 of the Farmout Agreement as:

. . . those depths below 6,600 feet below the surface and one hundred feet (100')

below the total depth drilled in the Earning Well . . . but excepts depths below eight

thousand two hundred and forty four (8,244') feet TVD. 

Texas Independent, therefore, was permitted to drill only below 6,660' and above 8,224' (“the

interval”). 

The Farmout Agreement also contained an option agreement, section 1.10.A, that required

Texas Independent to offer Union Pacific, at cost, up to forty percent (40%) of any interest Texas

Independent might subsequently acquire in any portion of the Lease, proportionately reduced to

Union Pacific’s current working interest. (1CR69): 

Should Farmee [Texas Independent] purchase any royalty, overriding royalty, net

profit or production payment covering any portion of the First Bank of Mission lease,
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2... An “overriding royalty interest” is a non-participating interest in an oil and gas lease. Ridge Oil Co. v.

Guinn Invs., Inc., 148 S.W.3d 143, 155 (Tex. 2004). An owner of an overriding royalty “has no right and thus no ability

to go onto the underlying property and drill or otherwise take action to perpetuate a lease.” Id. Rather, such an owner

is dependent on the lessee to preserve the lease. Id. 

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whether or not part of the Farmout lease . . . then Farmee shall offer to Farmor

[Union Pacific] the opportunity to purchase, at cost, up to 40.0% of the acquired

interest, proportionately reduced to Farmor’s current working interest. 

Texas Independent subsequently learned Sun Oil had a reserved interest in the Lease, a 12.5%

overriding royalty interest2in all the oil, gas, and hydrocarbons produced from all depths on the

entire 346.67-acre Lease (“the Sun ORRI”). On July 20, 1995, Texas Independent purchased the Sun

ORRI for $100,000. In accordance with section 1.10.A of the Farmout Agreement, Texas

Independent offered Union Pacific the opportunity to purchase forty percent of the Sun ORRI,

proportionately reduced to its current working interest. Union Pacific accepted. It is undisputed that

at the time of the offer, Union Pacific held a “current working interest” of 39.543%. Accordingly,

Union Pacific purchased a 1.97715% share of the Sun ORRI (40% x 12.5% x 39.543%), resulting

in a purchase price of $15,817.20. 

Because Union Pacific never paid Texas Independent for the portion of the Sun ORRI it

purchased, Texas Independent did not immediately execute the assignment. However, Texas

Independent treated Union Pacific’s interest as if it had been assigned by crediting payments to

reduce Union Pacific’s unpaid share of the purchase price. Despite the absence of a written

assignment at the time of the offer and acceptance, Union Pacific conveyed its interest in the Sun

ORRI to Sierra by “Assignment, Bill of Conveyance” dated November 15, 1996, and by “Correction

Assignment, Bill of Sale and Conveyance” dated March 20, 1997, and effective July 1, 1996. By

the time Texas Independent had received full payment from Union Pacific by deducting money from

payments due Union Pacific pursuant to its interest in the Sun ORRI, Union Pacific had already
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assigned its interest to Sierra. Accordingly, on May 7, 2000, Texas Independent executed an

“Assignment of Overriding Royalty Interest” (“the Assignment”) directly to Sierra. The Assignment

is the primary document around which the current controversy is centered. Sierra subsequently

assigned its interest in the Sun ORRI to Peoples Energy via an assignment and bill of sale executed

on April 26, 2001. 

From 1995 to 2000, Texas Independent completed a number of producing wells in the

interval and paid the holder of the Sun ORRI – Union Pacific, Sierra, or Peoples Energy – the

1.97715% interest on all production. In 2001, production was obtained from wells drilled below the

interval. For two years, Peoples Energy was paid the 1.97715% interest on this production as well,

and Texas Independent executed division orders acknowledging this. However, in 2003, Texas

Independent “discovered” Peoples Energy had been paid the 1.97715% interest from depths below

the interval, and sent Peoples Energy a proposed “Amendment of Assignment of Overriding Royalty

Interest,” purporting to amend the Assignment between Texas Independent and Sierra by including

the following restriction: “INSOFAR AND ONLY INSOFAR as to all such production produced

from the subsurface depths of 6, 600 feet to 8, 224 feet.” In a letter enclosed with the proposed

amendment, Texas Independent claimed that when it sold the Sun ORRI to Union Pacific, the sale

included only an interest in minerals produced in the interval, and Peoples Energy had been

“overpaid” when it received payment from production from wells below the interval. Texas

Independent requested a retroactive redistribution of payment. Peoples Energy declined.

In October 2003, Peoples Energy filed a declaratory judgment action seeking a declaration

that it owned the 1.97715% interest in the Sun ORRI as to all production under the Lease without

any regard to a depth restriction. Texas Independent counterclaimed and then filed partial traditional
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and no evidence motions for summaryjudgment seeking a declaration that Peoples Energy’s interest

in the Sun ORRI was limited to the interval, Texas Independent owns the Sun ORRI below the

interval, and Texas Independent is entitled to recover monies wrongfully paid to Peoples Energy

from production below the interval. Peoples Energy filed a cross-motion for summary judgment,

arguing that as a matter of law the Assignment was unambiguous and gave Peoples Energy a

1.97715% interest in the Sun ORRI to all depths, and the statute of fraud precluded the Texas

Independent’s interpretation of the assignment. The trial court granted Peoples Energy’s motion for

summary judgment and denied those filed by Texas Independent. Texas Independent perfected this

appeal. 

STANDARD OF REVIEW

A no evidence motion for summary judgment should be granted if the non-movant fails to

present more than a scintilla of probative evidence to raise a genuine issue of material fact on the

challenged element. Timpte Indus. v. Gish, 286 S.W.3d 306, 310 (Tex. 2009); Ford Motor Co. v.

Ridgway, 135 S.W.3d 598, 600 (Tex. 2004). A traditional motion for summary judgment is granted

only when the movant establishes there are no genuine issues of material fact and it is entitled to

judgment as a matter of law. Mann Frankfort Stein & Lipp Advisors, Inc. v. Fielding, No. 07-0490,

2009 WL 1028051, at *3 (Tex. Apr. 17, 2009). An appellate court reviews the grant or denial of a

motion for summary judgment de novo. Id.; Texas Mun. Power Agency v. Pub. Util. Comm’n of

Texas, 253 S.W.3d 184, 192 (Tex. 2007). The denial of a motion for summaryjudgment is generally

not appealable, but can be reviewed on appeal when both parties moved for summary judgment and

the trial court granted one motion and denied the other. Id. In such cases the appellate court reviews

each summary judgment, determines all questions presented, and renders the judgment the trial court
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should have rendered. Id. When the trial court’s order does not specify the grounds for summary

judgment, the appellate court must affirm the summary judgment if any of the theories presented to

the trial court and preserved for appellate review are meritorious. Provident Life and Accident Ins.

Co. v. Knott, 128 S.W.3d 211, 216 (Tex. 2003). 

Interpretation or construction of an unambiguous contract is amatter of law to be determined

by the court. Coats v. Farmers Ins. Exch., 230 S.W.3d 215, 217 (Tex. App.—Houston [14th Dist.]

2006, no pet.). When the controversy can be resolved by proper construction of an unambiguous

contract, summary judgment is appropriate. Id.; see also Hackberry Creek Country Club, Inc. v.

Hackberry Creek Home Owners Ass’n, 205 S.W.3d 46, 56 (Tex. App.—Dallas 2006, pet. denied)

(citing Reilly v. Rangers Mgmt., Inc., 727 S.W.2d 527, 529 (Tex. 1987)). However, if the contract

is ambiguous, summary judgment is improper because the intent of the parties is a fact issue.

Hackberry Creek, 205 S.W.3d at 56 (citing Coker v. Coker, 650 S.W.2d 391, 394 (Tex. 1983; Harris

v. Rowe, 593 S.W.2d 303, 306 (Tex. 1979)). 

ANALYSIS

In construing a written contract, we must ascertain and give effect to the parties’ intentions

as expressed in the four corners of the document. Frost Nat’l Bank v. L & F Distribs., Ltd., 165

S.W.3d 310, 311-12 (Tex. 2005) (per curiam). We consider the entire writing and attempt to

harmonize and give effect to all the provisions of the contract by analyzing the provisions with

reference to the whole agreement. Id. at 312. “No single provision taken alone will be given

controlling effect; rather, all the provisions must be considered with reference to the whole

instrument.” J.M. Davidson, Inc. v. Webster, 128 S.W.3d 223, 229 (Tex. 2003). If after the pertinent
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rules of construction are applied, a contract can be given a definite or certain legal meaning, it is

unambiguous, and is construed as a matter of law. Frost Nat’l Bank, 165 S.W.3d at 312. 

Texas Independent and Peoples Energy agree, as do we, that the Assignment is unambiguous.

Accordingly, we will construe it as a matter of law and render the summary judgment the trial court

should have rendered. See id. Texas Independent contends the Assignment gave Sierra, and

therefore Peoples Energy, a 1.97715% interest in the Sun ORRI, but only from production in the

interval. Peoples contends the Assignment was not restricted to the interval, claiming instead the

Assignment gave Sierra a 1.99715% interest in all production under the entire Lease without any

depth restriction. 

Pursuant to the Assignment, Texas Independent assigned Sierra a 1.97715% overriding

royalty interest in “100% of all the oil, gas, and other hydrocarbons produced under” the entire

346.67-acre Lease. This is an extremely broad and seemingly unambiguous granting clause.

Because a deed passes the greatest estate possible unless there are clear and unequivocal exceptions

or reservations, the Assignment would appear to convey to Sierra an interest in the Sun ORRI

without any depth restriction. See Templeton v. Dreiss, 961 S.W.2d 645, 657 (Tex. App.—San

Antonio 1998, pet. denied) (holding deed will be construed to confer upon grantee greatest estate that

terms of instrument will permit). This interpretation is supported by the fact that neither the original

346.67-acre Lease from First National Bank of Mission to Vessels nor the 80-acre Farmout Lease

acquired by Union Pacific contained a depth restriction relating to the Sun ORRI. Rather, the 6,600'-

8,244' depth restriction applied only to Texas Independent under the Farmout Agreement for the

Farmout Lease (the 80-acre lease from Union Pacific to Texas Independent). 
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Relying in part on Eland Energy, Inc. v. Rowden Oil & Gas, Inc., 914 S.W.2d 179 (Tex.

App.—San Antonio 1995, writ denied), Texas Independent contends the Assignment contains a

depth restriction because the “subject to” clause in the Assignment references the Farmout

Agreement, and when the documents are read together the interest in the Sun ORRI is limited to the

interval. The “subject to” clause in the Assignment states, in pertinent part: 

The interest herein conveyed to Assignee is subject to the terms and provisions

contained in the Lease and all prior contracts pertaining thereto, including but not

limited to, the following: 

1. That certain Farmout Agreement dated April 22, 1995, between Union

Pacific Oil and Gas Company, et al[.], as Farmors and Texas Independent

Exploration, Inc., as Farmee. 

The Assignment is also made “subject to” the assignment of the Sun ORRI to Texas Independent,

and the assignment of Union Pacific’s proportionate share in the Sun ORRI to Sierra. 

Texas Independent argues section 1.10A of the Farmout Agreement, to which the Assignment

is subject, limits Peoples Energy’s interest in the Sun ORRI to the “current working interest” held

by Union Pacific, which Texas Independent claims was limited to 1.97715% in the 6,600'-8,224'

interval. Texas Independent contends that to interpret the Assignment in any other way ignores the

“subject to” language, which applied section 1.10A of the Farmout Agreement to the Assignment.

According to Texas Independent, but for section 1.10A, neither Union Pacific nor its successors in

interest would have had any right to the Sun ORRI, and therefore by inserting the “subject to”

language in the Assignment, the parties inserted the “proportionate reduction” and “current working

interest” limitations into the Assignment. 

Countering Texas Independent’s argument, Peoples Energy contends reversal is not

warranted because: (1) Texas Independent incorrectly concludes the “subject to’ clause has only one
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possible construction, (2) Texas Independent’s reliance on this court’s opinion in Eland is misplaced,

(3) none of the following provides for a relevant depth restriction – section 1.10A of the Farmout

Agreement, the term “working interest,” orthe Sun ORRI chain of title, and (4) Texas Independent’s

interpretation of the Assignment conflicts with general rules of contract construction. Peoples

Energy concludes the trial court correctlygranted its motion for summary judgment because a proper

interpretation of the Assignment establishes it conveyed to Sierra a 1.97715% interest, i.e., the

“current working interest,” to the minerals under the 346.67-acre Lease without regard to depth. 

Construction of “Subject To” Clause

Texas Independent contends the trial court erred in granting summary judgment in favor of

Peoples Energy because to do so required the court to ignore the “subject to” clause, thereby

rendering it meaningless in violation of the rules of construction. See J.M. Davidson, 128 S.W.3d

at 229 (holding that in ascertaining true intent of parties as expressed in instrument, court must

consider entire writing in effort to harmonize and give effect to all provisions so that none will be

rendered meaningless). We disagree.

The phrase “subject to” is a limitation of a grant, defining the nature, extent, and character

of the estate conveyed. Cockrell v. Tex. Gulf Sulphur Co., 157 Tex. 10, 16, 299 S.W.2d 672, 676

(1956); Petro Pro, Ltd. v. Upland Res., Inc., 279 S.W.3d 743, 750 (Tex. App.—Amarillo 2007, pets.

denied). “It neither conveys an interest to the assignee, nor does it reserve or retain an interest in

favor of the assignor.” Petro Pro, 279 S.W.3d at 750; see Wright v. E.P. Operating Ltd. P’ship, 978

S.W.2d 684, 688 (Tex. App.—Eastland 1998, pet. denied)(holding conveyancemade no reservation

even where it was “subject to” prior recorded reservation). Rather, it simply limits the extent of the

interest granted. Petro Pro, 279 S.W.3d at 750. As such, it “is a term of qualification and not of
04-07-00778-CV

3... See EOG Res., Inc. v. Killam Oil Co., 239 S.W.3d 293, 298 (Tex. App.—San Antonio 2007, pet. denied)

(holding court may consider facts and circumstances surrounding execution of contract as construction aid). 

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contract[,]” and “[t]here is nothing in the use of the words ‘subject to,’ in their ordinary use, which

would even hint at the creation of affirmative rights.” Kokernot v. Caldwell, 231 S.W.2d 528, 531

(Tex. Civ. App.—Dallas 1950, writ ref’d). The principal function of a “subject to” clause is to

protect a grantor against a breach of warranty claim. Walker v. Foss, 930 S.W.2d 701, 706 (Tex.

App.—San Antonio 1996, no writ). Conveying land “subject to” defined interests is merely a means

of providing notice of outstanding interests that may affect a grantee’s title. PYR Energy Corp v.

Samson Res. Co., 470 F.Supp.2d 709, 717 (E.D. Tex. 2007) (citing Wright, 978 S.W.2d at 688). 

Here, the summary judgment evidence establishes Texas Independent offered and sold the

interest in the Sun ORRIto Union Pacific by way of letters that never mentioned a depth restriction.

Texas Independent subsequently assigned the Sun ORRI to Sierra without mentioning a depth

restriction. Sierra did not participate in the previous transaction between Union Pacific and Texas

Independent, and Texas Independent had nothing to do with the transaction between Union Pacific

and Sierra. Therefore, in interpreting the Assignment and its “subject to” clause, the trial court,

considering the facts and circumstances surrounding the execution of the Assignment3, could have

concluded the clause was intended merely to (1) document the chain of title, (2) insulate Texas

Independent from claims byUnion Pacific (or its successors) that Texas Independent had wrongfully

assigned the deed to Sierra, and/or (3) insulate Texas Independent from claims of breach of warranty

by Sierra. See Wright, 978 S.W.2d at 688; Walker, 930 S.W.2d at 706. Moreover, the trial court

could have concluded the “subject to” clause did not impose the depth restriction applicable to the

Farmout Land, i.e., the 80 acres assigned by Union Pacific to Texas Independent under the Farmout

Agreement, on other portions of the 346.67-acre Lease. Finally, the trial court knew the “subject to”
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clause could not be used to describe the land to which the Sun ORRI applied nor to restrict it, and

thus the parties must have intended it to have another meaning. See Averyt v. Grande Inc., 717

S.W.2d 891, 894-95 (Tex. 1986) (holding “subject to” clause does not limit land description). 

Accordingly, given that the meanings and effects of “subject to” clauses can vary given the

particular circumstances, Texas Independent’s contention that the trial court necessarily ignored the

“subject to” clause when it granted summary judgment in favor of Peoples Energy is incorrect. 

Eland Energy, Inc. v. Rowden Oil & Gas, Inc.

Texas Independent also contends the trial court erred in granting summary judgment in favor

of Peoples Energy because it failed to follow this court’s decision in Eland. According to Texas

Independent, Eland is directly on point and mandates that we interpret the “subject to” clause to limit

Peoples Energy’s interest in the Sun ORRI to the interval. We have carefully reviewed Eland and

must again disagree with Texas Independent. 

First, Eland is not a contract construction case. See 914 S.W.2d at 184-88. Rather, it deals

with issues relating to limitations, statute of frauds, laches, estoppel, and a non-assignability clause.

Id. Second, regarding the “subject to” clause, our discussion in Eland revolved around Eland

Energy’s limitations claim, and we merely held the clause could not “be ignored” and it had to “be

assumed that the parties intended that it have meaning.” Id. at 185. We agree with our statements

in Eland, but its holding does not mandate the interpretation of the “subject to” clause proposed by

Texas Independent. 

In Eland, the parties executed a farmout agreement covering what was known as the Perez

Lease. Id. at 182. Under the agreement, the farmor agreed to assign the farmee “40 acres in the form

of a square as nearly as possible” around each producing well completed by the farmee. Id. After
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the farmee completed the first well under the agreement, he suggested to the farmor that it would be

easier if the farmor assigned the entire Perez Lease to the farmee. Id. If the farmee failed to develop

any portion of the lease, he would later assign these portions back to the farmor. Id. This

conditional assignment stated it was “subject to” the terms and provisions of the farmout agreement,

which included a continuous drilling obligation and provided the manner in which ownership could

be acquired. Id. Subsequently, Eland Energy, a successor-in-interest to the farmee, attempted to

escape the reassignment provision, refusing to reassign the undeveloped portions of the lease back

to the farmor after drilling ceased. Id. at 183. When Eland Energy refused to reassign the

undeveloped land as required by the farmout agreement, the farmor and numerous successors-ininterest to the farmee filed suit to clear title, arguing that pursuant to the farmout agreement and the

conditional assignment,Eland Energywas required to reassign the undeveloped portions of the lease

back to the farmor. Id. Eland Energy claimed it did not have to reassign the land to the farmor and

was entitled ownership of the undeveloped portions of the lease because, among other things, the

farmor’s suit sought specific performance to convey real property and was barred by limitations. Id.

The trial court found in favor of the farmor and the successors-in-interest, and this court affirmed

the judgment. Id. at 181, 184. 

In affirming the trial court’s judgment, this court rejected Eland Energy’s statute of

limitations claim. In our analysis, we noted the “subject to” clause of the conditional assignment was

at the “crux” of Eland Energy’s limitations claim. Id. at 185. We then held the farmout agreement

and the conditional assignment had to be read together or the “subject to” clause would be rendered

meaningless. Id. We further held the clause could have but one meaning –that despite the

assignment of the entire Perez Lease to the farmee, the farmee could only acquire equitable title in
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the lease by earning it pursuant to the farmout agreement, i.e., by drilling producing wells. Id.

Because Eland Energy did not produce wells on the property at issue, it did not acquire any equitable

interest in that property. Accordingly, the farmor’s claim could not be characterized as a specific

performance action to convey real property, Eland Energy had nothing to convey, and the four-year

statute of limitation did not apply. Id. at 186. 

Our holding in Eland requires only that a “subject to” clause not be ignored or rendered

meaningless. There is no evidence the trial court ignored the clause simply because it failed to

accept Texas Independent’s interpretation of it. 

This case and Eland share commonalities only with regard to the documents involved: a

mineral lease, a farmout agreement, and an assignment that is “subject to” the farmout agreement.

In all other respects the cases are drastically different:

•Eland involved a conditional assignment of a lease made to modify the mechanics

of a farmout agreement. The present case involved an unconditional assignment of

an ORRI in “100% of the oil, gas and other hydrocarbons” under a lease in order to

satisfy an option agreement that happened to be contained in a farmout agreement.

•Eland concerned a conveyance of bare legal title and reservation of equitable title.

Here, there was no dispute that full title passed.

•It was undisputed in Eland that the original contracting parties intended to reassign

the undeveloped tracts back to the farmor. In the present case Texas Independent

disputed the intent evidenced in the Assignment to convey the Sun ORRI with no

depth restriction. 

•Most importantly, the farmout agreement in Eland involved the same interest in land

as the assignment made subject to it. In contrast, the Farmout Agreement involved

the 80-acre Farmout Lease, while the Assignment involved the Sun ORRI, which

covered the entire 346.67-acre Lease. Unlike Eland, even when the Farmout

Agreement and the Assignment are read together, it does not necessitate a finding of

a depth restriction related to the Sun ORRI. The depth restriction related only to the

Farmout Agreement between Texas Independent and Union Pacific, and limited

Texas Independent’s interest to the interval. No such limitation is applicable to the

Sun ORRI. 
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Accordingly, our holding in Eland does not mandate a finding that the “subject to” clause’s reference

to the Farmout Agreement and other assignments inserted a depth with regard to the Sun ORRI. 

Section 1.10A of the Farmout Agreement

Texas Independent places a great deal of reliance on section 1.10A of the Farmout Agreement

to challenge the summary judgment in favor of Peoples Energy. As noted above, section 1.10A

provides that if Texas Independent purchased anyroyalty or overriding royalty interest in any portion

of the 346.67-acre Lease (not just the 80-acre lease assigned to it by Union Pacific), Union Pacific

had an option to purchase up to forty percent of the purchased interest, proportionally reduced to its

current working interest. (2CR541) Texas Independent claims this is the source of the depth

restriction to which the Sun ORRI is subject. Texas Independent’s reliance is misplaced for two

reasons: (1) section 1.10A is nothing more than an option agreement, and (2) Texas Independent’s

interpretation of section 1.10A would render meaningless the part of section 1.10A that gives Union

Pacific the option to purchase any interest Texas Independent might purchase on “any portion” of

the 346.67-acre Lease. 

Section 1.10A is merely an option contract that happens to be in a farmout agreement. See

Probus Props. v. Kirby, 200 S.W.3d 258, 261 (Tex. App.—Dallas 2006, pet. denied) (stating that

in option to purchase property, optioner offers to sell property on stated terms for specific period of

time, and optionee has right to accept or decline);see also RESTATEMENT (SECOND) OF CONTRACTS

§ 25 (1981) (stating option contract is promise meeting requirement for formation of contract, but

that limits promisor’s power to revoke offer). Section 1.10A’s only function, based on its

unambiguous language, is to obligate Texas Independent to offer a part of any interest it might

purchase in the Lease to Union Pacific for purchase. Once the option was exercised, it no longer
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existed, unless and until Texas Independent purchased some other interest in the lease. Rather, a

binding, bilateral contract was formed and the previous relationship of Texas Independent as

optioner and Union Pacific as optionee ceased, and a new relationship of grantor and grantee arose,

requiring Texas Independent to execute an instrument to convey the interest purchased to Union

Pacific. See, e.g., Pitman v. Sanditen, 626 S.W.2d 496, 498 (Tex. 1981); Luccia v. Ross, 274 S.W.3d

140, 148-49 (Tex. App.—Houston [1st Dist.] 2008, pet. denied). Once the conveying instrument

was executed, in this case the Assignment, all prior transactions between Texas Independent and

Union Pacific and its successors-in-interest to the Sun ORRI were merged into the Assignment, and

all of the parties’ rights rested solely in the Assignment. See Alvarado v. Bolton, 749 S.W.2d 47,

48 (Tex. 1988) (holding that where deed is delivered and accepted as performance of contract to

convey, contract merges into deed and deed alone determine parties’ rights); GXG, Inc. v. Texacal

Oil & Gas, 977 S.W.3d 403, 415 (Tex. App.—Corpus Christi 1998, pet. denied) (holding doctrine

of “merger by deed” operates to merge all prior transactions between parties into deed). 

Here, as a mere option contract, once the Assignment was executed, the parties’ rights in the

Sun ORRI was controlled by the Assignment, and no longer had a separate effect. Accordingly,

Section 1.10A cannot supply the depth restriction claimed by Texas Independent. 

Additionally, if we were to accept Texas Independent’s interpretation that section 1.10A

provided a depth restriction with regard to the Assignment of the Sun ORRI, it would render another

portion of section 1.10A meaningless and limit Union Pacific’s rights under the Farmout Agreement.

Section 1.10A gave Union Pacific an option to purchase if Texas Independent purchases “any

portion” of the 346.67-acre Lease. It is undisputed that but for the depth restriction placed on Texas

Independent with regard to the Farmout Land (the 80-acre lease from Union Pacific to Texas
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Independent), there is no depth restriction on the other portions of the Lease. If section 1.10A limits

the optionee to only the interval, the option to purchase royalties obtained by the optioner on “any

portion” of the Lease is rendered meaningless. Such an interpretation would be contrary to the rules

of construction. See J.M. Davidson, 128 S.W.3d at 229 (holding that in ascertaining true intent of

parties as expressed in instrument, court must consider entire writing in effort to harmonize and give

effect to all provisions so that none will be rendered meaningless). 

“Working Interest”

We also reject Texas Independent’s argument that the use of the term “working interest” in

section 1.10A imposed a depth restriction on the Sun ORRI obtained by Union Pacific. Texas

Independent attempts to ascribe a meaning to “working interest” that conflicts with definitions

espoused by other courts, as well as the parties’ use of it in this case. 

“[A] working interest is generally understood to mean a mineral interest created by a

leasehold.” Broesche v. Jacobson, 218 S.W.3d 267, 272 (Tex. App.—Houston [14th Dist.] 2007,

pet. denied); see also Geodyne Energy Income Prod. P’ship I-E v. Newton Corp., 161 S.W.3d 482,

486 n.10 (Tex. 2005) (describing “gross working interest” as “percentage share of all expenses and

revenues . . . plus any royalties attributable to the working interest.”). It may also be used to denote

an interest in mineral rights. Broesche, 218 S.W.3d at 273. Texas Independent cites no authority

for the proposition that the use of the term “working interest” in section 1.10A supplied a depth

restriction to the royalty interest purchased by Union Pacific. 

Moreover, the summary judgment evidence reflects the parties in this case used “working

interest” to refer to a percentage of ownership. In section 4.3.5 of the Farmout Agreement, the

parties agreed that if the Farmout Lease covered less than the entire mineral estate described therein,
04-07-00778-CV

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or if Union Pacific’s “working interest” was less than one hundred percent, then any retained or

reversionary interest of Union Pacific would be proportionately reduced. “Working interest” was

clearly used to refer to Union Pacific’s percentage of ownership. Additionally, when Texas

Independent offered Union Pacific the Sun ORRI, as required by section 1.10A, Texas Independent

described Union Pacific’s working interest as 39.543%, not as a depth restriction. Also, the

Assignment conveys a 1.97715% interest in the Sun ORRI, and this percentage could only have been

calculated using the working interest as a percentage of ownership: 12.5% (the Sun ORRI purchased

by Texas Independent) multiplied by 40% (the percentage of interest Union Pacific was entitled to

purchase) multiplied by 39.543% (Union Pacific’s working interest). Texas Independent used this

exact calculation in its offer letters to determine Union Pacific’s pro rata share of the purchase price,

confirming the parties use of “working” interest as a percentage of ownership, not a depth restriction.

If Texas Independent is correct that “working interest” connotes a depth restriction, the

calculation set forth above would be different. Texas Independent paid $100,000 for a 12.5%

overriding royaltyinterest in all the mineral produced from all depths in the entire 346.67-acre Lease.

When Texas Independent offered the Sun ORRI to Union Pacific as required, it did not apportion

the purchase price to account for a depth restriction. As Peoples Energy points out, if Union Pacific

purchased the Sun ORRI with a depth restriction, the purchase price should have been reduced;

however, Texas Independent sought payment based on the $100,000 it paid for the non-restricted

interest. 

Finally, the summary judgment record includes a division order, dated 2001, which was after

Texas Independent executed the Assignment and two wells had been drilled to more than 8,244'. 

If Texas Independent’s interpretation of working interest were correct, the 2001 division order would
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show Texas Independent as the owner of a 12.5 overriding royalty interest in the two wells drilled

below 8,224'. However, the division order reflects Texas Independent owns a 10.522850%

overriding royalty interest (the original 12.5% purchased from Sun less the 1.97715% purchased by

Union Pacific and later assigned to Sierra). (2CR608) Texas Independent confirmed this division

order and signed it, signaling its recognition that “working interest” mean percentage of ownership

unrelated to depth. 

Accordingly, Texas Independent’s attempt to impose a depth restriction through the term

“working interest” is an improper interpretation of the term according to the law as well as the

summary judgment evidence. 

Rules of Construction

In addition to violating basic rules of construction by rendering meaningless a portion of

section 1.10A as discussed above, Texas Independent’s interpretation of the Assignment – the

“subject to” clause, section 1.10A, and the term “working interest” – violates the rule of construction

that grants are to be liberally construed in favor of the grantee, and exceptions strictly construed

against the grantor. Baker v. Henderson, 137 Tex. 266, 276, 153 S.W.2d 465, 470 (1941); Chambers

v. Huggins, 709 S.W.2d 219, 221 (Tex. App.—Houston [14th Dist.] 1986, no writ). It also ignores

the basic rule that reservations and exceptions in grants must be clear and specific; courts do not

favor reservations by implication. Sharp v. Fowler, 151 Tex. 490, 494, 252 S.W.2d 153, 154 (1952);

Derwen Res., LLC v. Carrizo Oil & Gas, Inc., No. 09-07-00597-CV, 2008 WL 6141597, at *6 (Tex.

App.—Beaumont May 21, 2009, pet. filed) (mem. op.). To properly make a reservation or

exception, it should be mentioned in the granting clause and fully set out thereafter. Derwen, 2008

WL 6141597, at *6 (citing 55 TEX.JUR.3D Oil and Gas § 65 (2004)). Here, Texas Independent was
04-07-00778-CV

4... Given our disposition, we need not address Peoples Energy’s alternate contention that the statute of fraud

precludes Texas Independent’s interpretation of the Assignment. 

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clearly capable of limiting Union Pacific’s interest in the Sun ORRI to the 6,600'-8,224' interval if

that had been its intention. Depth restrictions are not novel in the oil and gas industry. Finally, to

adopt Texas Independent’s interpretation would be to allow Texas Independent’s current, subjective

intent to control over the intent as expressed in the Assignment, which is impermissible. See Frost

Nat’l Bank, 165 S.W.3d at 311-12 (in construing a written contract courts must give effect to intent

as expressed in four corners of document). 

CONCLUSION

We hold the Assignment, even when considered with the Farmout Agreement, is capable of

but one interpretation: that Union Pacific, pursuant to section 1.10A, purchased a percentage of the

Sun ORRI, proportionately reduced, without regard to depth. Texas Independent’s attempt to

transfer the depth restriction imposed on it under the Farmout Agreement to the subsequent Sun

ORRI by way of the “subject to” clause, section 1.10A, or the term “working interest” is

incongruous. The only depth restriction in this case arose in the Farmout Agreement between Union

Pacific and Texas Independent. That depth restriction limited Texas Independent’s interest in the

Farmout Land to the 6,600'-8,224' interval. The Sun ORRI, on the other hand, entitled its owner to

an overriding royalty interest in all the minerals produced from all depths in the entire Lease.

Accordingly, we overrule Texas Independent’s issues and affirm the trial court’s judgment.4 

Steven C. Hilbig, Justice