CLAYTON -C-

Operated by RIO PETROLEUM, INC. (P-5 712840) in the PANHANDLE GRAY COUNTY FIELD field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 521District 10Field 68873001OilCasinghead gasSave
Value, all time
$7.0 M
Jan 1993 – May 2026
Value, last 12 filed months
$291 k
at the published price for each month
Months reported
401
no gaps in the span
Streams
2
oil, casinghead gas

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
OilDisposition115,565 bbl$6,258,371
Casinghead gasProduction149,979 Mcf$711,723
Total$6,970,095

1,562 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 (4)

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 35.3713, -100.7051. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.1 miles.

35.37106, -100.70502 · 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
25.0%
1 of 4 wells
With a plug date
25.0%
1 of 4 wells
Median depth
2,856 ft
1 wells filed one
Completion to plug
13.6 years
median over 1 wells

What the state filed about each well

On the RRC proration schedule
125.0%
A plug date is filed
125.0%
BothOn the schedule and plugged. Neither fact cancels the other.
125.0%
NeitherNo plug date, and not on the schedule.
375.0%

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

The one well that filed a depth was drilled to 2,856 ft.

Completions filed
Jan 1983
1 of 4 wells; 3 filed none
Plug dates filed
Aug 1996
1 of 4 wells; 3 filed none

Last completion to plug: a median of 13.6 years across the 1 well that filed both dates, with the middle half between 13.6 years and 13.6 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

4 wells

42-179826081
42-179826092
42-179826114
42-1790809132,856 ftJan 1983Aug 1996Yes

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 202634760106.413.05$37,107
Apr 202635211598.932.87$35,153
Mar 202634711589.753.15$31,505
Feb 20261736563.503.75$11,229
Jan 20263502859.138.00$20,919
Dec 202534411156.664.41$19,981
Nov 202535516758.593.93$21,455
Oct 202534514859.383.30$20,975
Sep 202535813262.743.08$22,867
Aug 202534813763.933.01$22,661
Jul 202534912066.743.32$23,690
Jun 202534515166.483.13$23,408
May 202534815160.553.23$21,559
Apr 20253615962.363.54$22,721
Mar 2025340067.704.27$23,018
Feb 202504570.884.34$195
Jan 202534817874.324.28$26,625
Dec 20243503768.993.12$24,262
Nov 202434519069.052.20$24,240
Oct 20245342771.372.28$38,173
Sep 2024349069.612.36$24,294
Aug 2024170075.632.06$12,857
Jul 2024329079.932.15$26,297
Jun 2024175078.082.63$13,664
May 2024349078.812.20$27,505
Apr 2024354084.451.66$29,895
Mar 2024169080.301.55$13,571
Feb 2024345076.091.78$26,251
Jan 2024347073.023.30$25,338
Dec 2023176071.262.61$12,542
Nov 202335112777.892.81$27,696
Oct 202335411985.443.09$30,613
Sep 2023343089.042.74$30,541
Aug 202317215680.522.67$14,266
Jul 202352219274.852.64$39,579
Jun 202317522168.962.26$12,567
May 202334830970.622.23$25,264
Apr 202335118378.122.24$27,830
Mar 202334712372.852.39$25,573
Feb 2023344075.112.47$25,838
Jan 2023347076.533.39$26,556
Dec 202233715576.415.73$26,638
Nov 202233825485.005.65$30,164
Oct 20223639987.185.86$32,227
Sep 202235937084.888.16$33,492
Aug 202235240894.529.13$36,995
Jul 2022350320101.587.54$37,966
Jun 2022355263115.097.98$42,955
May 2022359251109.378.43$41,381
Apr 2022182129104.226.84$19,850
Mar 2022353267108.885.08$39,790
Feb 20225381591.054.86$49,058
Jan 202217818481.844.54$15,402
Dec 202135629871.323.90$26,552
Nov 202115821877.435.24$13,376
Oct 202117816979.795.71$15,168
Sep 2021036569.865.35$1,953
Aug 202116838866.024.22$12,729
Jul 202135639070.783.98$26,751
Jun 202117737869.493.38$13,578
May 202135526163.483.02$23,323
Apr 202135818160.362.76$22,108
Mar 202118534561.302.72$12,278
Feb 202117119257.805.55$10,949
Jan 20213597750.412.81$18,314
Dec 202017918644.642.68$8,488
Nov 20203528038.772.71$13,864
Oct 202017424636.972.48$7,042
Sep 202036022737.091.99$13,804
Aug 202017724639.982.39$7,663
Jul 20203584038.371.83$13,809
Jun 20201805034.901.69$6,367
May 202035642116.921.81$6,788
Apr 202036333614.751.80$5,961
Mar 202017745930.341.86$6,222
Feb 202034411349.881.98$17,383
Jan 202036449457.252.09$21,874
Dec 201935440759.012.30$21,827
Nov 201935320155.302.75$20,074
Oct 201918350753.472.42$11,011
Sep 201933958155.052.66$20,206
Aug 201934673553.112.30$20,070
Jul 201935587156.272.46$22,119
Jun 201917591652.782.49$11,518
May 201935180558.482.74$22,732
Apr 201934580962.632.75$23,833
Mar 201936079656.803.06$22,885
Feb 201917039150.852.79$9,736
Jan 201935951546.033.23$18,187
Dec 201836042246.594.19$18,539
Nov 201817429452.934.24$10,456
Oct 201835448261.443.40$23,388
Sep 201835543359.543.11$22,482
Aug 201835439359.403.07$22,233
Jul 201834340665.142.93$23,533
Jun 201835748860.183.08$22,986
May 201836063365.382.90$25,373
Apr 201817844363.842.90$12,649
Mar 201853666161.222.79$34,656
Feb 201836781361.782.77$24,922
Jan 2018363062.874.01$22,822
Dec 2017363057.272.92$20,789
Nov 2017362055.423.12$20,062
Oct 2017323049.292.98$15,921
Sep 2017361047.523.09$17,155
Aug 2017348045.373.00$15,789
Jul 201735112743.873.09$15,790
Jun 201734414142.493.09$15,052
May 20171831645.373.26$8,355
Apr 20173387347.933.21$16,435
Mar 201736214746.772.98$17,369
Feb 201734754350.452.95$19,109
Jan 201736034949.413.42$18,981
Dec 201635723548.763.72$18,282
Nov 201635952142.492.64$16,632
Oct 201618036746.193.09$9,448
Sep 201635968041.553.10$17,025
Aug 201654149841.442.92$23,875
Jul 201617738741.622.92$8,498
Jun 201636134045.352.69$17,285
May 201635910242.521.99$15,468
Apr 20163655536.561.99$13,454
Mar 201636939233.011.79$12,884
Feb 201635950626.472.06$10,547
Jan 201636922527.352.36$10,624
Dec 20153437732.362.00$11,254
Nov 201536560638.792.17$15,472
Oct 201536360643.552.43$17,279
Sep 201536023542.992.76$16,125
Aug 201534566040.162.87$15,751
Jul 201534975348.152.95$19,022
Jun 201554050056.152.88$31,762
May 201534947255.212.96$20,663
Apr 201554256849.822.71$28,540
Mar 201517159742.892.93$9,086
Feb 201535956244.662.98$17,706
Jan 201536747443.433.10$17,409
Dec 201455469654.693.59$32,798
Nov 201436574370.464.25$28,877
Oct 201435962578.303.90$30,548
Sep 201452378486.164.05$48,233
Aug 201435285289.394.04$34,903
Jul 201451531796.564.18$51,053
Jun 201436563198.164.74$38,817
May 201470168194.734.73$69,625
Apr 201418544495.944.81$19,884
Mar 201454256395.895.06$54,819
Feb 201436343497.406.19$38,044
Jan 201452721790.404.86$48,696
Dec 201318727691.824.35$18,372
Nov 201353867288.853.74$50,313
Oct 201354280797.423.78$55,852
Sep 2013355692104.113.72$39,532
Aug 2013527259104.253.52$55,852
Jul 20133530102.523.72$36,190
Jun 201336017994.403.93$34,688
May 201336047894.834.15$36,122
Apr 201353174993.964.28$53,100
Mar 201354051593.623.91$52,570
Feb 201316829591.233.42$16,336
Jan 201366651891.603.42$62,777
Dec 201233161386.773.42$30,817
Nov 201235168086.953.62$32,984
Oct 201234179489.383.40$33,178
Sep 201253768494.672.92$52,834
Aug 201234561792.662.91$33,762
Jul 201253982585.133.02$48,377
Jun 201250979179.822.52$42,621
May 201249663291.612.49$47,011
Apr 2012330812101.652.00$35,166
Mar 2012681700105.052.22$73,095
Feb 2012331729101.102.57$35,338
Jan 201249378498.092.73$50,502
Dec 201150441496.873.24$50,164
Nov 201134570495.723.31$35,355
Oct 201153286284.983.65$48,354
Sep 201135977083.623.99$33,089
Aug 201134869083.404.15$31,886
Jul 201150966594.144.52$50,921
Jun 201150838992.904.64$48,998
May 201134982898.134.40$37,895
Apr 2011339155105.964.33$36,592
Mar 2011086896.364.06$3,522
Feb 201118222385.644.18$16,519
Jan 201116917786.504.59$15,431
Dec 201016816685.734.35$15,124
Nov 20100080.843.80$0
Oct 2010072978.103.51$2,558
Sep 201017630572.633.98$13,997
Aug 2010056973.684.42$2,515
Jul 201035346672.554.74$27,817
Jun 2010071170.364.91$3,491
May 201017516671.124.24$13,149
Apr 201017846881.694.12$16,470
Mar 2010068178.394.39$2,989
Feb 201034064773.585.44$28,538
Jan 2010022374.365.96$1,330
Dec 200916855971.445.48$15,067
Nov 200917674774.593.75$15,930
Oct 200917778472.544.11$16,062
Sep 2009064865.543.06$1,986
Aug 200917577767.423.22$14,299
Jul 200917236161.133.46$11,765
Jun 200918057966.163.90$14,164
May 200917578954.743.93$12,677
Apr 200917146046.773.59$9,648
Mar 200917763342.144.06$10,028
Feb 200932938932.814.63$12,597
Jan 200918365235.865.37$10,064
Dec 2008068537.105.98$4,094
Nov 200817685555.496.86$15,632
Oct 200817879575.246.92$18,896
Sep 2008177359101.767.88$20,839
Aug 2008176304114.228.48$22,682
Jul 20080420131.0811.39$4,784
Jun 20080442131.3313.03$5,760
May 200883601123.1711.57$17,179
Apr 20080572110.3110.45$5,980
Mar 2008364681101.909.66$43,673
Feb 200817961992.538.77$21,992
Jan 200818168390.388.21$21,963
Dec 200735169988.337.30$36,108
Nov 200718167891.677.29$21,536
Oct 200736775082.856.92$35,597
Sep 200735771375.846.24$31,527
Aug 200736074669.066.39$29,627
Jul 200716478670.906.39$16,649
Jun 200736577362.007.55$28,465
May 200718183858.747.85$17,207
Apr 200736175559.617.81$27,412
Mar 200716881856.927.30$15,536
Feb 200715878255.108.22$15,131
Jan 200734475950.306.73$22,409
Dec 200618289056.656.92$16,468
Nov 200617975754.207.62$15,468
Oct 200617597154.906.01$15,447
Sep 200635393560.085.04$25,918
Aug 200618384568.717.34$18,776
Jul 200635782269.376.34$29,979
Jun 200635767066.286.38$27,939
May 200617783766.016.42$17,062
Apr 200636927764.397.36$25,799
Mar 200617844156.707.08$13,216
Feb 200633869757.597.75$24,868
Jan 200634885460.598.93$28,714
Dec 200517785854.9413.42$21,235
Nov 200536481854.6910.59$28,568
Oct 200517896958.3413.80$23,753
Sep 200536136761.4512.08$26,616
Aug 200517595561.519.80$20,120
Jul 200589396855.697.84$57,324
Jun 200517787252.337.38$15,699
May 200517792945.226.65$14,183
Apr 200517792149.207.36$15,487
Mar 200517295250.377.15$15,475
Feb 200516187245.226.31$12,784
Jan 2005084343.166.32$5,330
Dec 2004034439.866.75$2,322
Nov 200417538845.286.33$10,380
Oct 200418360449.706.52$13,030
Sep 200417092343.245.28$12,228
Aug 200417194442.375.55$12,485
Jul 200417785538.286.08$11,978
Jun 2004048136.106.43$3,094
May 200435296037.486.49$19,428
Apr 200417550834.475.86$9,008
Mar 200417847534.365.53$8,743
Feb 200417639932.455.51$7,910
Jan 200417444432.036.30$8,370
Dec 200318341430.266.30$8,146
Nov 200317950528.804.60$7,476
Oct 200317924328.174.76$6,199
Sep 200335138326.314.75$11,054
Aug 200317749229.765.13$7,791
Jul 200335241729.415.17$12,509
Jun 200318160028.565.98$8,759
May 200335462726.595.97$13,158
Apr 200317559526.675.41$7,885
Mar 200335965131.146.10$15,148
Feb 200335457933.487.93$16,441
Jan 200318463330.315.58$9,110
Dec 200235453026.914.85$12,099
Nov 200235452024.664.14$10,881
Oct 200235939426.464.23$11,165
Sep 200217926327.443.64$5,868
Aug 200235626325.963.16$10,074
Jul 200235231324.583.06$9,610
Jun 200217828423.733.34$5,172
May 200235030324.663.58$9,717
Apr 200217131023.653.51$5,133
Mar 200235731122.003.10$8,819
Feb 200217934018.222.38$4,069
Jan 200236335017.172.38$7,064
Dec 200118335616.932.36$3,940
Nov 200118333918.072.41$4,122
Oct 200137035519.782.53$8,216
Sep 200136636824.262.25$9,708
Aug 200118238724.873.05$5,708
Jul 200136638923.933.20$10,002
Jun 200118242724.563.82$6,103
May 200118548625.524.31$6,815
Apr 200136847124.685.34$11,595
Mar 200118231824.545.38$6,176
Feb 200137042727.755.77$12,730
Jan 200136231227.478.40$12,565
Dec 200018634526.889.12$8,147
Nov 200036956232.215.66$15,065
Oct 200036346031.235.15$13,703
Sep 200036439631.875.19$13,655
Aug 200035842729.644.54$12,550
Jul 200036360628.534.09$12,835
Jun 200034365029.304.40$12,908
May 200036559427.263.68$12,136
Apr 200035326324.513.12$9,472
Mar 200018039628.422.86$6,248
Feb 200036852027.622.73$11,582
Jan 200037341025.272.48$10,443
Dec 199918943524.282.42$5,643
Nov 199936962223.192.43$10,071
Oct 199937257720.982.80$9,422
Sep 199918563821.752.62$5,695
Aug 199937067319.262.88$9,061
Jul 199918767017.892.37$4,935
Jun 199936666715.942.36$7,410
May 199918360915.792.32$4,303
Apr 199918563015.102.21$4,185
Mar 199918156512.471.84$3,296
Feb 199903689.981.82$669
Jan 199918624310.381.90$2,392
Dec 19981851759.201.77$2,012
Nov 1998377010.892.19$4,106
Oct 1998187012.421.97$2,323
Sep 19983675112.592.08$4,727
Aug 19983506311.301.91$4,075
Jul 1998357011.742.24$4,191
Jun 1998364011.242.24$4,091
May 1998195012.622.21$2,461
Apr 1998148013.042.51$1,930
Mar 1998191012.802.31$2,445
Feb 1998160013.952.30$2,232
Jan 1998177014.702.15$2,602
Dec 19973635116.322.41$6,047
Nov 19973465118.193.09$6,451
Oct 19971805119.253.15$3,626
Sep 19973585117.742.95$6,502
Aug 19973504217.862.55$6,358
Jul 19973185117.582.25$5,705
Jun 19971675117.242.26$2,994
May 19973355118.972.31$6,473
Apr 19973655117.882.08$6,632
Mar 19973465118.951.94$6,656
Feb 19973454820.492.21$7,175
Jan 19973544123.483.54$8,457
Dec 19961875123.32$4,361
Nov 19965095121.97$11,183
Oct 19963645123.31$8,485
Sep 19963655122.22$8,110
Aug 19961833020.26$3,708
Jul 19961665119.55$3,245
Jun 19961845118.73$3,446
May 19965205119.43$10,104
Apr 19961885121.51$4,044
Mar 19961695119.38$3,275
Feb 19963754416.98$6,368
Jan 19961885117.07$3,209
Dec 19953665217.19$6,292
Nov 19953555016.00$5,680
Oct 19951675215.43$2,577
Sep 19953685016.18$5,954
Aug 19951795215.92$2,850
Jul 19951715215.24$2,606
Jun 19953725016.41$6,105
May 19953685217.56$6,462
Apr 19951825017.73$3,227
Mar 19953655216.44$6,001
Feb 19951834716.58$3,034
Jan 19953705215.92$5,890
Dec 19943595215.03$5,396
Nov 19941825015.90$2,894
Oct 1994355315.58$5,531
Sep 19941805115.29$2,752
Aug 1994367316.13$5,920
Jul 1994186317.56$3,266
Jun 1994184317.09$3,145
May 1994183115.88$2,906
Apr 19940114.14$0
Mar 1994356112.46$4,436
Feb 19940112.50$0
Jan 1994182112.66$2,304
Dec 1993183112.33$2,256
Nov 19930214.49$0
Oct 1993175215.85$2,774
Sep 1993177315.03$2,660
Aug 1993186315.66$2,913
Jul 19930315.46$0
Jun 1993368316.79$6,179
May 1993178317.68$3,147
Apr 1993363318.05$6,552
Mar 19933516018.14$6,367
Feb 19931765417.90$3,150
Jan 19933536016.93$5,976

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                  347 bbl  × $106.41 =    $36,924
Casinghead gas        60 Mcf  × $  3.05 =       $183

────────────────────────────────────────────────────
Month total                                  $37,107

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. 10/O/521 is the state's own key, not one this site invented.