DUFFER "A"

Operated by BYRNE OIL COMPANY (P-5 119795) in the ADAMS (DUFFER, LOWER) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 20849District 7BField 00622400Hydrogen sulphide fieldNGPA filingOilCasinghead gasSaveExport
Value, all time
$7.0 M
Jan 1993 – May 2026
Value, last 12 filed months
$337 k
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

The Railroad Commission's own record for the field this lease produces from, including the spacing rule that governs how close together its wells may be drilled.

These are facts about the field, not about this lease. The field holds 17 leases and 30 wells, and the rule below applies to all of them.

Discovered
1982-07-10
as the register files it
Field class
Oil and gas
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.

Severance-tax incentive filings

Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.

ProgrammeFilingsWith an approval dateDatedDocket
NGPA7none

This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.

What this lease produced, and what it was worth

Oil and condensate are valued on the volume the state records as disposed of; gas and casinghead gas on the volume produced. They are different columns of different files, and the difference is not cosmetic.

StreamBasisVolumeValue
OilDisposition116,117 bbl$6,322,679
Casinghead gasProduction217,896 Mcf$682,113
Total$7,004,792

64,453 Mcf of this lease's gas, across 48 months, carries no value here. No free Texas wellhead gas price exists before 1997, so those months are left out of the total rather than valued at zero. The total above is therefore a floor, not an estimate.

Wells on this lease (9)

Every wellbore the Railroad Commission records against this lease key, with the depth, the last completion and the plug date exactly as filed. A well with no plug date is not stated to be producing — the state files no such flag.

These wells centre on 32.4062, -98.6444. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

32.40610, -98.64756 · centre of the wells drawn, derived

What these wells add up to

Every figure below is counted over all of this lease's wells, not over the rows listed above. The Railroad Commission files two facts about a well's state — a plug date and a proration-schedule flag — and a well can carry both, so they are published as separate counts and never merged into a status.

On the schedule
22.2%
2 of 9 wells
With a plug date
22.2%
2 of 9 wells
Median depth
3,553 ft
9 wells filed one
Completion to plug
22.5 years
median over 2 wells

What the state filed about each well

On the RRC proration schedule
222.2%
A plug date is filed
222.2%
BothOn the schedule and plugged. Neither fact cancels the other.
222.2%
NeitherNo plug date, and not on the schedule.
777.8%

A plug date is the date the Commission recorded the wellbore as sealed with cement and abandoned. It is the only end-of-life fact Texas files. There is no "active" flag on a well, so this page does not print one — a well with no plug date is not stated to be producing.

How deep they were drilled

Total depth in feet, 9 of 9 wells. Median 3,553 ft, with the middle half between 3,550 and 3,634 ft; the shallowest is 3,550 ft and the deepest 3,659 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.

When they were last completed

Last completion by decade, 9 of 9 wells, Feb 1984 – Jun 2000. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed
Feb 1984 – Jun 2000
9 of 9 wells
Plug dates filed
Jan 2004 – Mar 2011
2 of 9 wells; 7 filed none

Last completion to plug: a median of 22.5 years across the 2 wells that filed both dates, with the middle half between 20.3 years and 24.8 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

9 wells

42-1333779993,553 ftJun 2000
42-1333747983,634 ftSep 1990
42-1333675173,659 ftFeb 1986Jan 2004Yes
42-1333658963,653 ftSep 1985
42-1333658853,550 ftAug 1985
42-1333650043,550 ftJun 1985
42-1333623133,550 ftDec 1984
42-1333559423,550 ftMar 1984
42-1333549113,560 ftFeb 1984Mar 2011Yes

The API number is the state's, prefixed 42 for Texas. A well is matched to this lease by the lease key the Commission files on the wellbore record, so a well that has moved between leases appears under each one it was filed against.

Every month this lease reported (401)

Volume × price = value, one row per cycle. The price columns are the same series published on the prices page — nothing here is modelled.

401 months

May 20264140106.413.05$44,054
Apr 2026332098.932.87$32,845
Mar 2026367089.753.15$32,938
Feb 2026527063.503.75$33,465
Jan 2026184059.138.00$10,880
Dec 2025682056.664.41$38,642
Nov 2025282058.593.93$16,522
Oct 2025319059.383.30$18,942
Sep 2025328062.743.08$20,579
Aug 2025505063.933.01$32,285
Jul 2025343066.743.32$22,892
Jun 2025503066.483.13$33,439
May 2025339060.553.23$20,526
Apr 2025434062.363.54$27,064
Mar 2025475067.704.27$32,158
Feb 2025353070.884.34$25,021
Jan 2025478074.324.28$35,525
Dec 2024626068.993.12$43,188
Nov 2024320069.052.20$22,096
Oct 2024567071.372.28$40,467
Sep 2024347069.612.36$24,155
Aug 2024518075.632.06$39,176
Jul 20243267679.932.15$26,220
Jun 20245002778.082.63$39,111
May 2024328078.812.20$25,850
Apr 2024438084.451.66$36,989
Mar 2024472080.301.55$37,902
Feb 2024176076.091.78$13,392
Jan 2024173073.023.30$12,632
Dec 20235166671.262.61$36,942
Nov 202361413477.892.81$48,201
Oct 202349916385.443.09$43,138
Sep 202350512689.042.74$45,310
Aug 202351016780.522.67$41,512
Jul 202333817374.852.64$25,756
Jun 202352415868.962.26$36,492
May 202366617270.622.23$47,416
Apr 202368814678.122.24$54,073
Mar 202351315172.852.39$37,733
Feb 20233429375.112.47$25,917
Jan 202351616876.533.39$40,059
Dec 202267822276.415.73$53,078
Nov 202251318385.005.65$44,638
Oct 202252946287.185.86$48,827
Sep 202250364684.888.16$47,968
Aug 202234324694.529.13$34,666
Jul 2022337228101.587.54$35,952
Jun 2022318183115.097.98$38,058
May 2022328210109.378.43$37,644
Apr 2022517138104.226.84$54,825
Mar 2022533118108.885.08$58,632
Feb 202217516091.054.86$16,711
Jan 202235918081.844.54$30,197
Dec 202152215171.323.90$37,818
Nov 202135411777.435.24$28,023
Oct 202154112979.795.71$43,903
Sep 202118215569.865.35$13,544
Aug 202152313566.024.22$35,098
Jul 202153017570.783.98$38,210
Jun 202116816269.493.38$12,222
May 20215319463.483.02$33,992
Apr 202135214560.362.76$21,647
Mar 202134518961.302.72$21,662
Feb 20213378257.805.55$19,934
Jan 202137114550.412.81$19,110
Dec 202052819944.642.68$24,102
Nov 202052035538.772.71$21,121
Oct 202032934936.972.48$13,028
Sep 202017913837.091.99$6,914
Aug 202017412739.982.39$7,259
Jul 202068416138.371.83$26,539
Jun 202036523534.901.69$13,136
May 202053823316.921.81$9,526
Apr 202085624314.751.80$13,064
Mar 2020017730.341.86$329
Feb 202052617149.881.98$26,576
Jan 202035624357.252.09$20,890
Dec 201970722459.012.30$42,236
Nov 201935811955.302.75$20,125
Oct 201933425553.472.42$18,476
Sep 201950830855.052.66$28,784
Aug 201951632253.112.30$28,147
Jul 201950131656.272.46$28,969
Jun 201952832952.782.49$28,687
May 201935031658.482.74$21,334
Apr 201917728662.632.75$11,872
Mar 201918335656.803.06$11,485
Feb 201917532550.852.79$9,806
Jan 201935632446.033.23$17,433
Dec 201853634446.594.19$26,412
Nov 201817329552.934.24$10,407
Oct 201835634261.443.40$23,035
Sep 201834235559.543.11$21,466
Aug 201851837559.403.07$31,919
Jul 201850836465.142.93$34,158
Jun 201833925660.183.08$21,189
May 201834732965.382.90$23,641
Apr 201834329763.842.90$22,759
Mar 201817533161.222.79$11,636
Feb 201835223361.782.77$22,391
Jan 201834728162.874.01$22,943
Dec 201735027257.272.92$20,839
Nov 201736220555.423.12$20,701
Oct 201734822149.292.98$17,812
Sep 201752522347.523.09$25,636
Aug 201735427545.373.00$16,887
Jul 201752132743.873.09$23,866
Jun 201735125642.493.09$15,704
May 201731926845.373.26$15,348
Apr 201733931647.933.21$17,263
Mar 201733430046.772.98$16,516
Feb 201734925750.452.95$18,366
Jan 201733721349.413.42$17,379
Dec 201634321248.763.72$17,514
Nov 201651426742.492.64$22,546
Oct 201618631746.193.09$9,571
Sep 201634631441.553.10$15,350
Aug 201635034341.442.92$15,507
Jul 201634131841.622.92$15,122
Jun 201634829145.352.69$16,563
May 201617729042.521.99$8,103
Apr 201635329036.561.99$13,483
Mar 201617625533.011.79$6,267
Feb 201634928026.472.06$9,816
Jan 201635127927.352.36$10,260
Dec 201534528832.362.00$11,741
Nov 201517435938.792.17$7,528
Oct 201534037243.552.43$15,710
Sep 201530742642.992.76$14,373
Aug 201517428640.162.87$7,809
Jul 201534148448.152.95$17,845
Jun 201517245956.152.88$10,981
May 201534445255.212.96$20,328
Apr 201534842049.822.71$18,474
Mar 201535042042.892.93$16,244
Feb 201518336144.662.98$9,247
Jan 201534738843.433.10$16,273
Dec 201430336354.693.59$17,875
Nov 201417339470.464.25$13,865
Oct 201435142678.303.90$29,145
Sep 201416540586.164.05$15,855
Aug 201434437789.394.04$32,271
Jul 201434237696.564.18$34,595
Jun 201422334098.164.74$23,500
May 201417134794.734.73$17,839
Apr 201434635395.944.81$34,893
Mar 201435435795.895.06$35,750
Feb 201417132197.406.19$18,643
Jan 201435335690.404.86$33,642
Dec 201334532491.824.35$33,089
Nov 201317336188.853.74$16,721
Oct 201334241597.423.78$34,886
Sep 2013335381104.113.72$36,293
Aug 2013174385104.253.52$19,496
Jul 2013348397102.523.72$37,153
Jun 201317640894.403.93$18,219
May 201334147894.834.15$34,320
Apr 201334746693.964.28$34,600
Mar 201317846093.623.91$18,464
Feb 201334642491.233.42$33,016
Jan 201335547291.603.42$34,132
Dec 201217443186.773.42$16,572
Nov 201234446886.953.62$31,607
Oct 201235347189.383.40$33,152
Sep 201217646394.672.92$18,013
Aug 201234650692.662.91$33,532
Jul 201232551985.133.02$29,235
Jun 201216746079.822.52$14,489
May 201234548691.612.49$32,815
Apr 2012346475101.652.00$36,119
Mar 2012172459105.052.22$19,089
Feb 2012350432101.102.57$36,495
Jan 201217246198.092.73$18,132
Dec 201135346596.873.24$35,702
Nov 201135247295.723.31$35,256
Oct 201117248784.983.65$16,393
Sep 201117353383.623.99$16,591
Aug 201133761283.404.15$30,645
Jul 201116757094.144.52$18,296
Jun 201134557492.904.64$34,714
May 201134059598.134.40$35,985
Apr 2011168613105.964.33$20,458
Mar 201134854796.364.06$35,753
Feb 201117444685.644.18$16,766
Jan 201117449086.504.59$17,300
Dec 201035752285.734.35$32,875
Nov 201017349780.843.80$15,872
Oct 201035659678.103.51$29,895
Sep 201017659872.633.98$15,163
Aug 201017562973.684.42$15,674
Jul 201034660372.554.74$27,958
Jun 201017359970.364.91$15,114
May 201035059471.124.24$27,408
Apr 201017554881.694.12$16,555
Mar 201034545378.394.39$29,033
Feb 201016737273.585.44$14,312
Jan 201017139274.365.96$15,053
Dec 200917644871.445.48$15,030
Nov 200918043574.593.75$15,058
Oct 200934044872.544.11$26,505
Sep 200917148265.543.06$12,685
Aug 200917740267.423.22$13,227
Jul 200917450161.133.46$12,372
Jun 200916950266.163.90$13,136
May 200934849854.743.93$21,005
Apr 200917543646.773.59$9,749
Mar 200917845442.144.06$9,344
Feb 200917343532.814.63$7,691
Jan 200936047335.865.37$15,450
Dec 200817344737.105.98$9,090
Nov 200817752155.496.86$13,396
Oct 200817557375.246.92$17,133
Sep 2008172410101.767.88$20,732
Aug 2008178589114.228.48$25,328
Jul 2008161604131.0811.39$27,983
Jun 2008173574131.3313.03$30,201
May 2008341535123.1711.57$48,193
Apr 2008171532110.3110.45$24,425
Mar 2008171546101.909.66$22,701
Feb 200817549992.538.77$20,569
Jan 200817451190.388.21$19,919
Dec 200716949088.337.30$18,506
Nov 200716946991.677.29$18,912
Oct 200716755182.856.92$17,650
Sep 200733153975.846.24$28,469
Aug 200716956669.066.39$15,287
Jul 200716650870.906.39$15,014
Jun 200717250662.007.55$14,484
May 200717438858.747.85$13,265
Apr 200734042559.617.81$23,585
Mar 200717249856.927.30$13,427
Feb 200717240155.108.22$12,772
Jan 200717244150.306.73$11,618
Dec 200617949856.656.92$13,586
Nov 200621250754.207.62$15,352
Oct 200616777954.906.01$13,853
Sep 200616762960.085.04$13,202
Aug 200616969368.717.34$16,699
Jul 200633468669.376.34$27,521
Jun 200617062266.286.38$15,238
May 200616771166.016.42$15,592
Apr 200616767164.397.36$15,692
Mar 200616271056.707.08$14,214
Feb 200617859357.597.75$14,847
Jan 200634760860.598.93$26,456
Dec 200517254254.9413.42$16,721
Nov 200517361654.6910.59$15,984
Oct 200516859558.3413.80$18,010
Sep 200517050461.4512.08$16,534
Aug 200534158161.519.80$26,667
Jul 200516758055.697.84$13,850
Jun 200516856352.337.38$12,947
May 200516750045.226.65$10,877
Apr 200517552149.207.36$12,445
Mar 200534253750.377.15$21,069
Feb 200517150545.226.31$10,920
Jan 200517759843.166.32$11,420
Dec 200434558439.866.75$17,694
Nov 200416754245.286.33$10,993
Oct 200417456649.706.52$12,335
Sep 200434861143.245.28$18,276
Aug 200416863142.375.55$10,621
Jul 200434262338.286.08$16,882
Jun 200416961536.106.43$10,057
May 200434255337.486.49$16,410
Apr 200417855834.475.86$9,405
Mar 200434053634.365.53$14,647
Feb 200417446632.455.51$8,214
Jan 200434352632.036.30$14,300
Dec 200317056130.266.30$8,679
Nov 200335557028.804.60$12,843
Oct 200317461828.174.76$7,843
Sep 200334161026.314.75$11,869
Aug 200317562429.765.13$8,409
Jul 200335163229.415.17$13,591
Jun 200316757128.565.98$8,186
May 200333861726.595.97$12,673
Apr 200333959926.675.41$12,280
Mar 200317056631.146.10$8,744
Feb 200333949333.487.93$15,257
Jan 200334655230.315.58$13,569
Dec 200217156526.914.85$7,344
Nov 200217256124.664.14$6,562
Oct 200216957826.464.23$6,916
Sep 200234561327.443.64$11,695
Aug 200216961925.963.16$6,346
Jul 200217067224.583.06$6,236
Jun 200233464223.733.34$10,069
May 200216764524.663.58$6,430
Apr 200234263223.653.51$10,308
Mar 200216359522.003.10$5,432
Feb 200217650518.222.38$4,406
Jan 200217263017.172.38$4,450
Dec 200134061316.932.36$7,206
Nov 200116833118.072.41$3,832
Oct 200116776519.782.53$5,238
Sep 200135078724.262.25$10,263
Aug 200116974424.873.05$6,475
Jul 200116981823.933.20$6,659
Jun 200117173324.563.82$7,003
May 200117270925.524.31$7,443
Apr 200134367424.685.34$12,061
Mar 200117765124.545.38$7,844
Feb 200117562927.755.77$8,484
Jan 200116777727.478.40$11,113
Dec 200034377626.889.12$16,299
Nov 200016577832.215.66$9,717
Oct 200016989231.235.15$9,868
Sep 200016793731.875.19$10,182
Aug 200034087229.644.54$14,037
Jul 200016683428.534.09$8,147
Jun 200034087929.304.40$13,827
May 200034376527.263.68$12,165
Apr 200016972624.513.12$6,404
Mar 200016373128.422.86$6,723
Feb 200034365727.622.73$11,265
Jan 200017570925.272.48$6,181
Dec 199916974124.282.42$5,899
Nov 199916769723.192.43$5,569
Oct 199916674920.982.80$5,583
Sep 199933376921.752.62$9,257
Aug 199917080319.262.88$5,583
Jul 199917176617.892.37$4,876
Jun 199917175015.942.36$4,497
May 199917577115.792.32$4,553
Apr 199917072515.102.21$4,168
Mar 199934575012.471.84$5,681
Feb 19993406609.981.82$4,593
Jan 199917171810.381.90$3,139
Dec 19981717339.201.77$2,873
Nov 199816970810.892.19$3,388
Oct 199823476012.421.97$4,403
Sep 199816676412.592.08$3,681
Aug 199817780911.301.91$3,543
Jul 199834075511.742.24$5,681
Jun 199817271711.242.24$3,537
May 199817173312.622.21$3,775
Apr 199817170013.042.51$3,984
Mar 199817373212.802.31$3,905
Feb 199817564313.952.30$3,920
Jan 199816972114.702.15$4,038
Dec 199736174416.322.41$7,685
Nov 199718172918.193.09$5,544
Oct 199717581319.253.15$5,930
Sep 199717182417.742.95$5,468
Aug 199717084917.862.55$5,205
Jul 199731689117.582.25$7,557
Jun 199718080417.242.26$4,918
May 199717273818.972.31$4,967
Apr 199733072617.882.08$7,413
Mar 199717978718.951.94$4,918
Feb 199717668920.492.21$5,126
Jan 199718180523.483.54$7,099
Dec 199616287023.32$3,778
Nov 199633997221.97$7,448
Oct 19961681,14723.31$3,916
Sep 19963451,15422.22$7,666
Aug 19961761,18020.26$3,566
Jul 19961781,12719.55$3,480
Jun 19961691,14118.73$3,165
May 19963411,13919.43$6,626
Apr 19961741,03521.51$3,743
Mar 19963611,07719.38$6,996
Feb 199616495016.98$2,785
Jan 19963241,05717.07$5,531
Dec 19951871,16317.19$3,215
Nov 19953651,08816.00$5,840
Oct 19951831,19815.43$2,824
Sep 19953441,22016.18$5,566
Aug 19951811,31615.92$2,882
Jul 19951701,32615.24$2,591
Jun 19953511,26616.41$5,760
May 19951651,32417.56$2,897
Apr 19953711,20517.73$6,578
Mar 19951801,23416.44$2,959
Feb 19953481,11716.58$5,770
Jan 19951871,23015.92$2,977
Dec 19943651,24215.03$5,486
Nov 19941691,29215.90$2,687
Oct 19941851,39815.58$2,882
Sep 19943591,42615.29$5,489
Aug 19941781,53116.13$2,871
Jul 19943521,55817.56$6,181
Jun 19941841,52917.09$3,145
May 19943611,48215.88$5,733
Apr 19941851,48514.14$2,616
Mar 19943591,54112.46$4,473
Feb 19941811,33512.50$2,263
Jan 19943621,39912.66$4,583
Dec 19933751,53712.33$4,624
Nov 19931871,50214.49$2,710
Oct 19933601,63415.85$5,706
Sep 19933601,77815.03$5,411
Aug 19933501,55115.66$5,481
Jul 19931711,69615.46$2,644
Jun 19933491,61416.79$5,860
May 19931731,66617.68$3,059
Apr 19933531,59518.05$6,372
Mar 19933661,72418.14$6,639
Feb 19931861,52917.90$3,329
Jan 19931841,87316.93$3,115

How to read this page

The arithmetic is one multiplication per stream per month. Here it is, worked, on a real row from the table above.

May 2026 — as filed, then multipliedworked
Oil                  414 bbl  × $106.41 =    $44,054
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $44,054

The volumes are the state's, unchanged

Every barrel and every Mcf on this page is a number the Railroad Commission of Texas published in its monthly production query. Nothing is modelled, estimated or filled in.

The dollars are a multiplication, not a valuation

Volume × a published monthly price. It is not what the operator was paid: it takes no account of a contract, a differential, a transportation deduction, or the share any one owner holds.

Oil and gas are priced differently

Oil is a Texas realisation — the crude oil first purchase price. Gas is a benchmark, because no free Texas wellhead gas series exists at any date. The prices page publishes the difference rather than correcting it away.

A lease is not a well

The state reports oil on lease and gas on well, and this page is the lease grain. 7B/O/20849 is the state's own key, not one this site invented.