NALLEY, COY D. "B"

Operated by DIAMONDBACK E&P LLC (P-5 217012) in the SPRABERRY (TREND AREA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 13931District 7CField 85279200OilCasinghead gasSaveExport
Value, all time
$11.5 M
Nov 1995 – May 2026
Value, last 12 filed months
$329 k
at the published price for each month
Months reported
367
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 7,461 leases and 22,481 wells, and the rule below applies to all of them.

Discovered
1904-12-31
as the register files it
Field class
Oil and gas
the register's own label
Between wells
0 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 2016-03-08.

The Commission's schedule remark for this field reads: AREA) 85279200.

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
OilDisposition110,138 bbl$8,083,266
Casinghead gasProduction991,981 Mcf$3,393,199
Total$11,476,465

24,744 Mcf of this lease's gas, across 14 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 31.5332, -101.4664. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.3 miles.

31.53312, -101.46648 · 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
9,142 ft
4 wells filed one
Completion to plug
no well filed both dates

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

Between 7,700 and 10,100 ft, median 9,142 ft, over the 4 wells that filed a depth.

Completions filed
Apr 1981 – Aug 2010
3 of 4 wells; 1 filed none
Plug dates filed
Jul 2009
1 of 4 wells; 3 filed none

4 wells

42-3831070718,200 ftJul 2009Yes
42-38336763410,100 ftAug 2010
42-38336699310,083 ftJul 2010
42-3833170527,700 ftApr 1981

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 (367)

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

367 months

May 20261763,935106.413.05$30,714
Apr 20261713,92598.932.87$28,181
Mar 20261843,94589.753.15$28,939
Feb 20261713,51863.503.75$24,052
Jan 20261843,74259.138.00$40,808
Dec 20253514,23556.664.41$38,578
Nov 20251773,94758.593.93$25,868
Oct 20251734,31759.383.30$24,540
Sep 20251763,71462.743.08$22,470
Aug 20251713,62863.933.01$21,870
Jul 20251792,34666.743.32$19,724
Jun 20251743,77466.483.13$23,375
May 20253453,91460.553.23$33,541
Apr 20251773,77862.363.54$24,424
Mar 20251853,73167.704.27$28,450
Feb 20251833,74970.884.34$29,245
Jan 20253924,10574.324.28$46,697
Dec 20241904,08768.993.12$25,865
Nov 20241793,89569.052.20$20,923
Oct 20241743,95771.372.28$21,446
Sep 20241742,80469.612.36$18,742
Aug 202434573575.632.06$27,609
Jul 2024060979.932.15$1,307
Jun 20241761,15078.082.63$16,771
May 20243463,55778.812.20$35,088
Apr 202403,73884.451.66$6,202
Mar 20243553,80280.301.55$34,381
Feb 20241754,11276.091.78$20,650
Jan 20243603,71273.023.30$38,528
Dec 20231814,22871.262.61$23,936
Nov 20231724,05277.892.81$24,773
Oct 20233524,18285.443.09$42,986
Sep 20231693,22089.042.74$23,855
Aug 20231723,63880.522.67$23,573
Jul 20231693,63074.852.64$22,239
Jun 20231692,56368.962.26$17,443
May 20233504,04370.622.23$33,722
Apr 20231704,22578.122.24$22,735
Mar 20231874,32372.852.39$23,969
Feb 20233483,89075.112.47$35,730
Jan 20231804,45376.533.39$28,861
Dec 20221713,55676.415.73$33,439
Nov 20223564,08285.005.65$53,308
Oct 20221713,51087.185.86$35,490
Sep 20221733,15284.888.16$40,416
Aug 20221693,25494.529.13$45,674
Jul 20221713,629101.587.54$44,740
Jun 20223513,229115.097.98$66,155
May 20221693,595109.378.43$48,800
Apr 20223533,041104.226.84$57,583
Mar 20221773,405108.885.08$36,557
Feb 20221813,75691.054.86$34,730
Jan 20223413,09781.844.54$41,961
Dec 20213473,21771.323.90$37,292
Nov 20211773,57277.435.24$32,411
Oct 20211723,87179.795.71$35,842
Sep 20213384,11769.865.35$45,642
Aug 20211694,63566.024.22$30,720
Jul 20213454,62970.783.98$42,852
Jun 20211804,43069.493.38$27,484
May 20213464,62463.483.02$35,918
Apr 20213514,37460.362.76$33,252
Mar 20213444,67161.302.72$33,778
Feb 20211732,69957.805.55$24,973
Jan 20211774,25050.412.81$20,866
Dec 20205184,47444.642.68$35,094
Nov 20201743,38638.772.71$15,910
Oct 20201733,85036.972.48$15,938
Sep 20203494,52137.091.99$21,946
Aug 20201754,82639.982.39$18,507
Jul 20203514,44338.371.83$21,577
Jun 20205264,52134.901.69$25,999
May 2020104,05416.921.81$7,526
Apr 20205394,56214.751.80$16,182
Mar 20203504,29830.341.86$18,597
Feb 202003,13449.881.98$6,207
Jan 20203624,09357.252.09$29,298
Dec 20193574,91059.012.30$32,381
Nov 20193584,51555.302.75$32,217
Oct 20193724,99153.472.42$31,962
Sep 20193574,93455.052.66$32,764
Aug 20191784,85053.112.30$20,630
Jul 20193624,91356.272.46$32,456
Jun 20193614,63352.782.49$30,595
May 20193504,82158.482.74$33,679
Apr 20195334,63862.632.75$46,140
Mar 20193634,95356.803.06$35,785
Feb 20195064,38350.852.79$37,968
Jan 20193315,04746.033.23$31,529
Dec 20185375,13146.594.19$46,494
Nov 20185315,20352.934.24$50,152
Oct 20183545,32061.443.40$39,828
Sep 20183594,12259.543.11$34,186
Aug 20183524,92559.403.07$36,012
Jul 20185285,33165.142.93$50,024
Jun 20185345,18360.183.08$48,084
May 20185295,77965.382.90$51,350
Apr 20185385,75863.842.90$51,049
Mar 20185405,68161.222.79$48,891
Feb 20183544,98261.782.77$35,651
Jan 20188765,76462.874.01$78,184
Dec 20175295,67757.272.92$46,881
Nov 20173533,87755.423.12$31,653
Oct 20177135,99449.292.98$53,028
Sep 20177035,74747.523.09$51,149
Aug 20171762,72845.373.00$16,181
Jul 20171753,29543.873.09$17,850
Jun 20173493,58742.493.09$25,903
May 20175264,59745.373.26$38,866
Apr 20173363,12447.933.21$26,138
Mar 20171622,98246.772.98$16,474
Feb 20171552,64550.452.95$15,629
Jan 20171793,07849.413.42$19,367
Dec 20163573,18848.763.72$29,276
Nov 20165214,09142.492.64$32,955
Oct 20161383,91846.193.09$18,482
Sep 20165974,02641.553.10$37,288
Aug 20163264,06441.442.92$25,394
Jul 20163484,10241.622.92$26,479
Jun 20161573,06445.352.69$15,349
May 20163613,81242.521.99$22,940
Apr 20163574,23636.561.99$21,486
Mar 20163583,39833.011.79$17,914
Feb 20163563,90026.472.06$17,471
Jan 20165444,33027.352.36$25,116
Dec 20155394,80032.362.00$27,049
Nov 20151763,95038.792.17$15,388
Oct 20153483,79143.552.43$24,355
Sep 20151783,68442.992.76$17,814
Aug 20155333,98540.162.87$32,852
Jul 20151734,08648.152.95$20,364
Jun 20153554,27556.152.88$32,257
May 20155284,62555.212.96$42,820
Apr 20155374,52049.822.71$38,987
Mar 20155494,32842.892.93$36,248
Feb 20153494,08844.662.98$27,753
Jan 20153483,98443.433.10$27,467
Dec 20146865,01454.693.59$55,524
Nov 20145314,78670.464.25$57,764
Oct 20145305,02778.303.90$61,109
Sep 20143614,22786.164.05$48,204
Aug 20147024,85089.394.04$82,322
Jul 20145375,11196.564.18$73,215
Jun 20144974,36898.164.74$69,476
May 20146904,95194.734.73$88,765
Apr 20145424,51895.944.81$73,727
Mar 20145365,04695.895.06$76,914
Feb 20147104,41797.406.19$96,504
Jan 20147244,75290.404.86$88,548
Dec 20137084,80391.824.35$85,923
Nov 20137084,82788.853.74$80,950
Oct 20137095,14897.423.78$88,527
Sep 20138915,325104.113.72$112,559
Aug 20135144,208104.253.52$68,408
Jul 20137005,074102.523.72$90,628
Jun 20137244,94094.403.93$87,777
May 20137065,96894.834.15$91,712
Apr 20135274,70993.964.28$69,684
Mar 20138985,45093.623.91$105,396
Feb 20137354,90191.233.42$83,815
Jan 20139145,82191.603.42$103,630
Dec 20121,0725,87586.773.42$113,111
Nov 20121,0675,21586.953.62$111,680
Oct 20128833,77489.383.40$91,753
Sep 20128404,67994.672.92$93,178
Aug 20128735,54492.662.91$97,015
Jul 20128325,50285.133.02$87,449
Jun 20128705,36179.822.52$82,948
May 20121,0525,57791.612.49$110,251
Apr 20121,0305,513101.652.00$115,708
Mar 20121,2545,478105.052.22$143,905
Feb 20121,0755,215101.102.57$122,086
Jan 20121,2295,82898.092.73$136,487
Dec 20111,2465,75196.873.24$139,332
Nov 20111,5865,85295.723.31$171,190
Oct 20111,0505,32884.983.65$108,668
Sep 20111,3654,69983.623.99$132,871
Aug 20111,3645,30483.404.15$135,766
Jul 20111,5466,31994.144.52$174,085
Jun 20111,5486,90792.904.64$175,857
May 20111,6987,41098.134.40$199,264
Apr 20112,0667,433105.964.33$251,123
Mar 20112,1948,04696.364.06$244,059
Feb 20112,2358,25085.644.18$225,890
Jan 20112,4328,12786.504.59$247,661
Dec 20102,2408,96785.734.35$231,021
Nov 20102,4398,88880.843.80$230,902
Oct 20102,7599,95978.103.51$250,423
Sep 20102,4228,99272.633.98$211,693
Aug 20102,5648,53673.684.42$226,639
Jul 2010061272.554.74$2,899
Jun 20100070.364.91$0
May 20100071.124.24$0
Apr 20102081.694.12$163
Mar 201034078.394.39$2,665
Feb 201015073.585.44$1,104
Jan 201030074.365.96$2,231
Dec 200930071.445.48$2,143
Nov 200924074.593.75$1,790
Oct 200935072.544.11$2,539
Sep 200930065.543.06$1,966
Aug 200927067.423.22$1,820
Jul 200930061.133.46$1,834
Jun 200922066.163.90$1,456
May 200937054.743.93$2,025
Apr 200928046.773.59$1,310
Mar 200936042.144.06$1,517
Feb 200931032.814.63$1,017
Jan 200920035.865.37$717
Dec 200816037.105.98$594
Nov 20086055.496.86$333
Oct 20085075.246.92$376
Sep 2008170101.767.88$1,730
Aug 20082788114.228.48$3,830
Jul 200823207131.0811.39$5,372
Jun 20081035131.3313.03$1,769
May 200810123.1711.57$123
Apr 200833185110.3110.45$5,574
Mar 200816179101.909.66$3,360
Feb 20089092.538.77$833
Jan 200813090.388.21$1,175
Dec 200713088.337.30$1,148
Nov 200713091.677.29$1,192
Oct 20072015182.856.92$2,702
Sep 2007157275.846.24$1,587
Aug 20072515969.066.39$2,742
Jul 20071725070.906.39$2,802
Jun 2007129062.007.55$1,423
May 20070058.747.85$0
Apr 20070059.617.81$0
Mar 20070056.927.30$0
Feb 20070055.108.22$0
Jan 200703150.306.73$209
Dec 2006017656.656.92$1,218
Nov 2006038754.207.62$2,948
Oct 2006035854.906.01$2,153
Sep 2006231660.085.04$1,712
Aug 200684968.717.34$909
Jul 20069169.376.34$631
Jun 20061515866.286.38$2,003
May 20061833266.016.42$3,321
Apr 20062128164.397.36$3,420
Mar 200682656.707.08$638
Feb 20060057.597.75$0
Jan 200603960.598.93$348
Dec 2005013054.9413.42$1,744
Nov 20051010854.6910.59$1,690
Oct 20059413558.3413.80$7,346
Sep 20059030061.4512.08$9,154
Aug 20053546661.519.80$6,718
Jul 20053549155.697.84$5,800
Jun 20054346252.337.38$5,660
May 20052741745.226.65$3,994
Apr 20056167149.207.36$7,940
Mar 20057073350.377.15$8,770
Feb 20055568245.226.31$6,792
Jan 20056474043.166.32$7,441
Dec 20046385639.866.75$8,290
Nov 20046587545.286.33$8,482
Oct 20045688649.706.52$8,556
Sep 20046883943.245.28$7,374
Aug 20045888842.375.55$7,386
Jul 20046688638.286.08$7,917
Jun 20046084136.106.43$7,576
May 20046689737.486.49$8,299
Apr 20047667634.475.86$6,580
Mar 20045292134.365.53$6,880
Feb 20044265032.455.51$4,944
Jan 20042990232.036.30$6,611
Dec 20031371930.266.30$4,924
Nov 20031370828.804.60$3,628
Oct 20031585428.174.76$4,487
Sep 20031385426.314.75$4,398
Aug 20031582029.765.13$4,653
Jul 20031290629.415.17$5,038
Jun 20031490428.565.98$5,808
May 20031284326.595.97$5,354
Apr 20031582726.675.41$4,872
Mar 20031584231.146.10$5,600
Feb 20031674633.487.93$6,448
Jan 20032769130.315.58$4,676
Dec 20025783326.914.85$5,577
Nov 20024385824.664.14$4,610
Oct 20026097226.464.23$5,698
Sep 20024593427.443.64$4,630
Aug 20026694525.963.16$4,703
Jul 20026384724.583.06$4,142
Jun 20026394923.733.34$4,663
May 2002611,04424.663.58$5,246
Apr 20026497823.653.51$4,949
Mar 20025292622.003.10$4,017
Feb 20026295618.222.38$3,401
Jan 2002711,05817.172.38$3,733
Dec 2001981,06216.932.36$4,170
Nov 20016193818.072.41$3,359
Oct 2001971,08219.782.53$4,655
Sep 20016292224.262.25$3,580
Aug 2001781,07524.873.05$5,222
Jul 2001811,12523.933.20$5,535
Jun 20016299624.563.82$5,332
May 2001821,08525.524.31$6,766
Apr 2001701,11324.685.34$7,666
Mar 20019794224.545.38$7,445
Feb 20017059027.755.77$5,345
Jan 2001521,08227.478.40$10,516
Dec 20007098626.889.12$10,876
Nov 20008093632.215.66$7,873
Oct 20004293831.235.15$6,138
Sep 2000411,07831.875.19$6,898
Aug 2000501,27329.644.54$7,262
Jul 20004260228.534.09$3,660
Jun 20003148929.304.40$3,059
May 20005190427.263.68$4,717
Apr 20005791924.513.12$4,261
Mar 2000561,02728.422.86$4,528
Feb 20005380927.622.73$3,670
Jan 20006483125.272.48$3,679
Dec 1999621,03224.282.42$4,007
Nov 1999591,16923.192.43$4,214
Oct 1999501920.982.80$1,102
Sep 19996448921.752.62$2,673
Aug 19994859319.262.88$2,630
Jul 19996192717.892.37$3,290
Jun 19996174215.942.36$2,725
May 19996799515.792.32$3,367
Apr 19995099615.102.21$2,954
Mar 1999721,15612.471.84$3,023
Feb 1999511,1129.981.82$2,530
Jan 1999821,21510.381.90$3,160
Dec 1998661,2809.201.77$2,877
Nov 1998611,23810.892.19$3,370
Oct 1998851,16612.421.97$3,352
Sep 1998831,16212.592.08$3,465
Aug 1998951,47111.301.91$3,879
Jul 19981001,75311.742.24$5,096
Jun 19981051,44711.242.24$4,418
May 1998841,60212.622.21$4,595
Apr 199835013.042.51$456
Mar 1998591,75212.802.31$4,801
Feb 1998591,54413.952.30$4,373
Jan 1998381,58014.702.15$3,963
Dec 1997601,68716.322.41$5,047
Nov 1997511,38018.193.09$5,189
Oct 1997431,26919.253.15$4,825
Sep 1997461,30217.742.95$4,663
Aug 1997451,53217.862.55$4,718
Jul 1997561,80317.582.25$5,036
Jun 1997261,64417.242.26$4,159
May 1997431,96918.972.31$5,361
Apr 1997611,43317.882.08$4,075
Mar 1997691,82018.951.94$4,837
Feb 1997661,53820.492.21$4,745
Jan 1997451,59023.483.54$6,685
Dec 1996481,40323.32$1,119
Nov 1996601,62421.97$1,318
Oct 1996541,78323.31$1,259
Sep 1996551,75222.22$1,222
Aug 1996601,75120.26$1,216
Jul 1996651,83519.55$1,271
Jun 1996601,83318.73$1,124
May 1996591,84219.43$1,146
Apr 1996661,76721.51$1,420
Mar 1996681,90319.38$1,318
Feb 1996611,78916.98$1,036
Jan 1996691,86117.07$1,178
Dec 1995691,87017.19$1,186
Nov 1995631,73116.00$1,008

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                  176 bbl  × $106.41 =    $18,728
Casinghead gas     3,935 Mcf  × $  3.05 =    $11,985

────────────────────────────────────────────────────
Month total                                  $30,714

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. 7C/O/13931 is the state's own key, not one this site invented.