KNOLLE, OLGA

Operated by SAHARA OPERATING COMPANY (P-5 743279) 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 14133District 7CField 85279200OilCasinghead gasSaveExport
Value, all time
$2.4 M
Nov 1995 – May 2026
Value, last 12 filed months
$0
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
OilDisposition37,810 bbl$1,692,587
Casinghead gasProduction169,335 Mcf$722,272
Total$2,414,859

20,083 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 31.6134, -101.6308. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.8 miles.

31.61375, -101.63114 · 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
75.0%
3 of 4 wells
With a plug date
75.0%
3 of 4 wells
Median depth
8,142 ft
4 wells filed one
Completion to plug
39.1 years
median over 3 wells

What the state filed about each well

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

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 8,081 and 8,310 ft, median 8,142 ft, over the 4 wells that filed a depth.

Completions filed
Jan 1972 – Sep 1982
4 of 4 wells
Plug dates filed
Mar 2011 – Apr 2026
3 of 4 wells; 1 filed none

Last completion to plug: a median of 39.1 years across the 3 wells that filed both dates, with the middle half between 34.5 years and 46.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

4 wells

42-3833200158,310 ftSep 1982Jul 2012Yes
42-3830075148,081 ftJul 1972Apr 2026Yes
42-3830085318,150 ftFeb 1972Mar 2011Yes
42-3830075238,134 ftJan 1972

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 202600106.413.05$0
Apr 20260098.932.87$0
Mar 20260089.753.15$0
Feb 20260063.503.75$0
Jan 20260059.138.00$0
Dec 20250056.664.41$0
Nov 20250058.593.93$0
Oct 20250059.383.30$0
Sep 20250062.743.08$0
Aug 20250063.933.01$0
Jul 20250066.743.32$0
Jun 20250066.483.13$0
May 20250060.553.23$0
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 2025149074.324.28$11,074
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 20240069.612.36$0
Aug 20240075.632.06$0
Jul 20240079.932.15$0
Jun 20240078.082.63$0
May 20240078.812.20$0
Apr 20240084.451.66$0
Mar 2024179080.301.55$14,374
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230077.892.81$0
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 2023013080.522.67$347
Jul 2023016274.852.64$428
Jun 2023012968.962.26$291
May 2023014270.622.23$316
Apr 2023018278.122.24$407
Mar 202315518272.852.39$11,727
Feb 2023019875.112.47$488
Jan 20230076.533.39$0
Dec 20220076.415.73$0
Nov 2022018985.005.65$1,067
Oct 2022015887.185.86$926
Sep 2022020084.888.16$1,633
Aug 2022019694.529.13$1,789
Jul 20220227101.587.54$1,712
Jun 2022073115.097.98$582
May 20220172109.378.43$1,450
Apr 202200104.226.84$0
Mar 2022141215108.885.08$16,444
Feb 20220091.054.86$0
Jan 2022020481.844.54$926
Dec 2021015371.323.90$597
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 2021019666.024.22$827
Jul 2021019570.783.98$777
Jun 2021018269.493.38$615
May 2021018363.483.02$552
Apr 2021017460.362.76$480
Mar 202105461.302.72$147
Feb 202105457.805.55$300
Jan 2021020550.412.81$576
Dec 2020018144.642.68$484
Nov 2020038938.772.71$1,053
Oct 20200036.972.48$0
Sep 2020019837.091.99$394
Aug 202017730339.982.39$7,799
Jul 2020016038.371.83$292
Jun 202018026534.901.69$6,730
May 20200016.921.81$0
Apr 2020031814.751.80$574
Mar 202018734630.341.86$6,316
Feb 2020029249.881.98$578
Jan 2020033157.252.09$693
Dec 201917634259.012.30$11,174
Nov 2019032255.302.75$886
Oct 201916132053.472.42$9,383
Sep 2019028155.052.66$747
Aug 201916227353.112.30$9,233
Jul 2019034456.272.46$846
Jun 201916133352.782.49$9,327
May 2019034858.482.74$954
Apr 201918031762.632.75$12,145
Mar 20190056.803.06$0
Feb 2019031550.852.79$880
Jan 201915935246.033.23$8,455
Dec 201818335046.594.19$9,991
Nov 20180052.934.24$0
Oct 2018161061.443.40$9,892
Sep 2018032459.543.11$1,007
Aug 201817833559.403.07$11,601
Jul 2018034665.142.93$1,014
Jun 2018034060.183.08$1,046
May 201818136365.382.90$12,887
Apr 201817935563.842.90$12,457
Mar 2018035961.222.79$1,000
Feb 2018031161.782.77$860
Jan 201818433562.874.01$12,911
Dec 2017029357.272.92$856
Nov 2017018255.423.12$568
Oct 201718126249.292.98$9,703
Sep 2017028747.523.09$886
Aug 201717628845.373.00$8,850
Jul 2017033743.873.09$1,040
Jun 201717739742.493.09$8,746
May 2017050545.373.26$1,648
Apr 2017026947.933.21$864
Mar 2017015346.772.98$457
Feb 2017018750.452.95$552
Jan 201715721649.413.42$8,496
Dec 2016038048.763.72$1,415
Nov 201617338042.492.64$8,356
Oct 2016039146.193.09$1,208
Sep 201617837841.553.10$8,568
Aug 2016180041.442.92$7,459
Jul 2016039541.622.92$1,155
Jun 2016038445.352.69$1,031
May 201618239842.521.99$8,531
Apr 2016036036.561.99$717
Mar 201618026633.011.79$6,419
Feb 20160026.472.06$0
Jan 201617933427.352.36$5,685
Dec 2015026732.362.00$534
Nov 201517430638.792.17$7,413
Oct 201518030543.552.43$8,579
Sep 201517826442.992.76$8,380
Aug 2015515940.162.87$658
Jul 201517931848.152.95$9,555
Jun 2015031856.152.88$917
May 201517736655.212.96$10,854
Apr 20150049.822.71$0
Mar 20150042.892.93$0
Feb 20150044.662.98$0
Jan 2015183043.433.10$7,948
Dec 20140054.693.59$0
Nov 20140070.464.25$0
Oct 201416535578.303.90$14,304
Sep 2014019786.164.05$797
Aug 201417925689.394.04$17,034
Jul 2014031196.564.18$1,300
Jun 201418629098.164.74$19,631
May 201418429994.734.73$18,844
Apr 2014033895.944.81$1,625
Mar 201417736895.895.06$18,833
Feb 201418932397.406.19$20,409
Jan 2014024890.404.86$1,205
Dec 201318725191.824.35$18,263
Nov 2013025288.853.74$942
Oct 201318826397.423.78$19,309
Sep 20130282104.113.72$1,048
Aug 20130104104.253.52$366
Jul 20130259102.523.72$963
Jun 201318325194.403.93$18,262
May 2013026294.834.15$1,087
Apr 2013025793.964.28$1,101
Mar 201318625393.623.91$18,403
Feb 2013023491.233.42$800
Jan 20130091.603.42$0
Dec 201215924786.773.42$14,641
Nov 2012024286.953.62$877
Oct 201217927489.383.40$16,931
Sep 2012030694.672.92$893
Aug 2012038892.662.91$1,128
Jul 201207485.133.02$224
Jun 201217119479.822.52$14,138
May 2012030991.612.49$769
Apr 2012185307101.652.00$19,418
Mar 20121310105.052.22$794
Feb 20120283101.102.57$727
Jan 2012031398.092.73$856
Dec 201118532796.873.24$18,980
Nov 2011030995.723.31$1,023
Oct 201118332984.983.65$16,752
Sep 2011032683.623.99$1,299
Aug 201118434283.404.15$16,765
Jul 2011034494.144.52$1,554
Jun 2011132792.904.64$1,610
May 2011034498.134.40$1,515
Apr 2011139312105.964.33$16,080
Mar 2011133596.364.06$1,456
Feb 201117429585.644.18$16,134
Jan 2011033086.504.59$1,514
Dec 201018233985.734.35$17,077
Nov 2010034380.843.80$1,302
Oct 2010038978.103.51$1,365
Sep 201013716772.633.98$10,615
Aug 2010033173.684.42$1,463
Jul 201017810572.554.74$13,411
Jun 2010072370.364.91$3,550
May 2010080071.124.24$3,388
Apr 201018383581.694.12$18,392
Mar 201001,24378.394.39$5,455
Feb 201031877873.585.44$27,633
Jan 2010032374.365.96$1,926
Dec 200918631671.445.48$15,021
Nov 2009031974.593.75$1,197
Oct 2009035072.544.11$1,439
Sep 200914335065.543.06$10,445
Aug 200917636967.423.22$13,054
Jul 2009034661.133.46$1,199
Jun 2009034566.163.90$1,344
May 200918436154.743.93$11,489
Apr 2009035146.773.59$1,259
Mar 2009035942.144.06$1,457
Feb 200916032232.814.63$6,741
Jan 200918749235.865.37$9,348
Dec 2008074737.105.98$4,465
Nov 200818273155.496.86$15,114
Oct 200818172675.246.92$18,644
Sep 20080618101.767.88$4,868
Aug 2008176636114.228.48$25,498
Jul 2008187646131.0811.39$31,870
Jun 2008186653131.3313.03$32,938
May 2008180707123.1711.57$30,354
Apr 2008177700110.3110.45$26,843
Mar 20080688101.909.66$6,649
Feb 200835965592.538.77$38,963
Jan 200817074490.388.21$21,470
Dec 2007061988.337.30$4,520
Nov 200715263991.677.29$18,593
Oct 200717763682.856.92$19,067
Sep 2007071475.846.24$4,458
Aug 200716177569.066.39$16,069
Jul 200718361870.906.39$16,922
Jun 200718566362.007.55$16,475
May 2007072958.747.85$5,720
Apr 200718270159.617.81$16,320
Mar 200717972056.927.30$15,446
Feb 200718163255.108.22$15,166
Jan 200718169050.306.73$13,746
Dec 200618670656.656.92$15,421
Nov 200618370254.207.62$15,266
Oct 2006075854.906.01$4,558
Sep 200613071760.085.04$11,422
Aug 200613471468.717.34$14,448
Jul 200616178269.376.34$16,129
Jun 200618184166.286.38$17,366
May 200610764666.016.42$11,214
Apr 200618462264.397.36$16,426
Mar 200617974356.707.08$15,412
Feb 2006066557.597.75$5,154
Jan 200617674360.598.93$17,301
Dec 200518074954.9413.42$19,937
Nov 200518373654.6910.59$17,801
Oct 200517677658.3413.80$20,973
Sep 2005073361.4512.08$8,854
Aug 200535681261.519.80$29,853
Jul 2005081255.697.84$6,369
Jun 200518079052.337.38$15,250
May 200518381645.226.65$13,703
Apr 200517879049.207.36$14,572
Mar 200518172950.377.15$14,333
Feb 2005072045.226.31$4,545
Jan 200518373943.166.32$12,570
Dec 200418377439.866.75$12,520
Nov 200418275945.286.33$13,046
Oct 200418280249.706.52$14,271
Sep 200417881343.245.28$11,993
Aug 200415860642.375.55$10,058
Jul 200417986138.286.08$12,091
Jun 200418080336.106.43$11,664
May 200409537.486.49$617
Apr 2004149034.475.86$5,136
Mar 20041792534.365.53$6,289
Feb 200418460832.455.51$9,321
Jan 200418389432.036.30$11,493
Dec 200318891030.266.30$11,423
Nov 200318091728.804.60$9,398
Oct 200318699328.174.76$9,966
Sep 200318192326.314.75$9,146
Aug 200318385729.765.13$9,842
Jul 20031811,01829.415.17$10,587
Jun 200318189528.565.98$10,524
May 2003063826.595.97$3,811
Apr 200318062926.675.41$8,202
Mar 2003061431.146.10$3,743
Feb 2003057233.487.93$4,534
Jan 200318490430.315.58$10,623
Dec 200218193126.914.85$9,390
Nov 200215990324.664.14$7,657
Oct 200218498026.464.23$9,013
Sep 200216195527.443.64$7,889
Aug 200216298925.963.16$7,335
Jul 20021831,01924.583.06$7,618
Jun 20021871,01023.733.34$7,809
May 20021831,01324.663.58$8,143
Apr 200215798523.653.51$7,173
Mar 200218196222.003.10$6,967
Feb 200218181118.222.38$5,225
Jan 200216589017.172.38$4,947
Dec 200134291416.932.36$7,951
Nov 2001092418.072.41$2,223
Oct 200115677119.782.53$5,035
Sep 20011751,00624.262.25$6,510
Aug 20011691,06024.873.05$7,439
Jul 20011811,05223.933.20$7,695
Jun 20011621,02624.563.82$7,902
May 200115373925.524.31$7,088
Apr 2001079524.685.34$4,242
Mar 200113289024.545.38$8,024
Feb 200118089027.755.77$10,128
Jan 20011781,14527.478.40$14,506
Dec 20003591,12626.889.12$19,922
Nov 20001871,14732.215.66$12,513
Oct 20001831,19231.235.15$11,849
Sep 20001741,24131.875.19$11,982
Aug 20003641,49629.644.54$17,582
Jul 20003591,43828.534.09$16,123
Jun 2000068629.304.40$3,017
May 200018172027.263.68$7,583
Apr 2000073624.513.12$2,293
Mar 200018171028.422.86$7,174
Feb 200018072927.622.73$6,959
Jan 200001,49025.272.48$3,696
Dec 199915856024.282.42$5,194
Nov 1999050923.192.43$1,239
Oct 199911226120.982.80$3,082
Sep 199910020221.752.62$2,704
Aug 199914517319.262.88$3,290
Jul 199910121917.892.37$2,326
Jun 199916920915.942.36$3,188
May 1999025715.792.32$597
Apr 199918130915.102.21$3,415
Mar 199916132012.471.84$2,596
Feb 199902309.981.82$418
Jan 199918231510.381.90$2,488
Dec 19981782759.201.77$2,125
Nov 1998031010.892.19$678
Oct 199813917912.421.97$2,079
Sep 199810115312.592.08$1,590
Aug 199817713711.301.91$2,261
Jul 1998012211.742.24$273
Jun 199812120111.242.24$1,810
May 199815123012.622.21$2,413
Apr 199818346413.042.51$3,549
Mar 199818454212.802.31$3,607
Feb 199818449413.952.30$3,703
Jan 199836163214.702.15$6,669
Dec 199718669416.322.41$4,709
Nov 199717860318.193.09$5,100
Oct 199717561419.253.15$5,303
Sep 199717655617.742.95$4,765
Aug 199728360017.862.55$6,587
Jul 199716565417.582.25$4,370
Jun 199717178017.242.26$4,709
May 19972241,01818.972.31$6,599
Apr 199717760717.882.08$4,429
Mar 199712593318.951.94$4,178
Feb 199726778520.492.21$7,202
Jan 199716487223.483.54$6,937
Dec 19962641,09023.32$6,156
Nov 19963281,34221.97$7,206
Oct 19965291,40423.31$12,331
Sep 19963411,23122.22$7,577
Aug 199601,28020.26$0
Jul 19965142,79219.55$10,049
Jun 19963411,52018.73$6,387
May 19963421,72219.43$6,645
Apr 19961811,31421.51$3,893
Mar 19961771,23519.38$3,430
Feb 19961581,30716.98$2,683
Jan 19963821,51617.07$6,521
Dec 19953561,45017.19$6,120
Nov 199556588016.00$9,040

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.

Jan 2025 — as filed, then multipliedworked
Oil                  149 bbl  × $ 74.32 =    $11,074
Casinghead gas         0 Mcf  × $  4.28 =         $0

────────────────────────────────────────────────────
Month total                                  $11,074

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/14133 is the state's own key, not one this site invented.