CHILSON, LILYAN

Operated by SWANNER PROPERTIES (P-5 831660) in the K-M-A field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 6241District 09Field 47902001OilCasinghead gasSaveExport
Value, all time
$6.1 M
Jan 1993 – May 2026
Value, last 12 filed months
$126 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 347 leases and 2,190 wells, and the rule below applies to all of them.

Discovered
1931-12-31
as the register files it
Field class
Oil
the register's own label
Between wells
660 ft
minimum
From a lease line
330 ft
minimum

A drilling unit in this field needs at least 20 acres.

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
OilDisposition148,729 bbl$6,138,817
Casinghead gasProduction21 Mcf$0
Total$6,138,817

21 Mcf of this lease's gas, across 21 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 (19)

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 33.8597, -98.6860. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.2 miles.

33.85917, -98.68599 · 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
57.9%
11 of 19 wells
With a plug date
57.9%
11 of 19 wells
Median depth
4,146 ft
12 wells filed one
Completion to plug
17.6 years
median over 4 wells

What the state filed about each well

On the RRC proration schedule
1157.9%
A plug date is filed
1157.9%
BothOn the schedule and plugged. Neither fact cancels the other.
1157.9%
NeitherNo plug date, and not on the schedule.
842.1%

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, 12 of 19 wells. Median 4,146 ft, with the middle half between 4,062 and 4,169 ft; the shallowest is 3,956 ft and the deepest 4,207 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, 5 of 19 wells, Feb 1958 – Dec 2013. 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 1958 – Dec 2013
5 of 19 wells; 14 filed none
Plug dates filed
Jun 1985 – Nov 2025
11 of 19 wells; 8 filed none

Last completion to plug: a median of 17.6 years across the 4 wells that filed both dates, with the middle half between 14.0 years and 28.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

19 wells

42-4850151863,956 ftJul 1993Yes
42-4850505254,060 ftFeb 2002Yes
42-4858697334,062 ftMar 1986Yes
42-48586980104,136 ftNov 2025Yes
42-48586981114,152 ftOct 1987Yes
42-48586986184,194 ftJun 1985Yes
42-48586987194,140 ftJun 2009Yes
42-485869711
42-485869744
42-485869799
42-4858698212
42-4858698315
42-4858698416
42-4858698921
42-4850150674,155 ftDec 2013Nov 2025Yes
42-4858697224,022 ftJan 2008Sep 2022Yes
42-48586985174,197 ftSep 1981Feb 2002Yes
42-4858697884,207 ftSep 1981
42-48505055204,160 ftFeb 1958Jun 2010Yes

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 202600106.413.05$0
Apr 2026312098.932.87$30,866
Mar 2026160089.753.15$14,360
Feb 20260063.503.75$0
Jan 2026161059.138.00$9,520
Dec 20250056.664.41$0
Nov 2025160058.593.93$9,374
Oct 2025163059.383.30$9,679
Sep 2025159062.743.08$9,976
Aug 2025160063.933.01$10,229
Jul 2025319066.743.32$21,290
Jun 2025160066.483.13$10,637
May 2025158060.553.23$9,567
Apr 20250062.363.54$0
Mar 20250067.704.27$0
Feb 20250070.884.34$0
Jan 2025323074.324.28$24,005
Dec 20240068.993.12$0
Nov 20240069.052.20$0
Oct 20240071.372.28$0
Sep 2024306069.612.36$21,301
Aug 20240075.632.06$0
Jul 2024157079.932.15$12,549
Jun 2024154078.082.63$12,024
May 2024299078.812.20$23,564
Apr 20240084.451.66$0
Mar 20240080.301.55$0
Feb 2024304076.091.78$23,131
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 20230080.522.67$0
Jul 2023151074.852.64$11,302
Jun 2023149068.962.26$10,275
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 2023152072.852.39$11,073
Feb 2023146075.112.47$10,966
Jan 20230076.533.39$0
Dec 2022303076.415.73$23,152
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 2022291084.888.16$24,700
Aug 2022151094.529.13$14,273
Jul 202200101.587.54$0
Jun 20222910115.097.98$33,491
May 20223010109.378.43$32,920
Apr 20221490104.226.84$15,529
Mar 20221500108.885.08$16,332
Feb 20220091.054.86$0
Jan 2022305081.844.54$24,961
Dec 2021153071.323.90$10,912
Nov 20210077.435.24$0
Oct 2021304079.795.71$24,256
Sep 2021153069.865.35$10,689
Aug 2021298066.024.22$19,674
Jul 2021148070.783.98$10,475
Jun 2021303069.493.38$21,055
May 2021151063.483.02$9,585
Apr 2021304060.362.76$18,349
Mar 20210061.302.72$0
Feb 2021147057.805.55$8,497
Jan 2021229050.412.81$11,544
Dec 2020299044.642.68$13,347
Nov 2020148038.772.71$5,738
Oct 2020297036.972.48$10,980
Sep 2020149037.091.99$5,526
Aug 2020146039.982.39$5,837
Jul 2020440038.371.83$16,883
Jun 2020440034.901.69$15,356
May 20200016.921.81$0
Apr 2020148014.751.80$2,183
Mar 2020147030.341.86$4,460
Feb 2020296049.881.98$14,764
Jan 2020151057.252.09$8,645
Dec 2019152059.012.30$8,970
Nov 2019297055.302.75$16,424
Oct 2019144053.472.42$7,700
Sep 2019298055.052.66$16,405
Aug 2019294053.112.30$15,614
Jul 2019303056.272.46$17,050
Jun 2019455052.782.49$24,015
May 2019151058.482.74$8,830
Apr 2019318062.632.75$19,916
Mar 2019155056.803.06$8,804
Feb 2019461050.852.79$23,442
Jan 20190046.033.23$0
Dec 2018305046.594.19$14,210
Nov 20180052.934.24$0
Oct 20180061.443.40$0
Sep 2018302059.543.11$17,981
Aug 2018150059.403.07$8,910
Jul 2018302065.142.93$19,672
Jun 2018152060.183.08$9,147
May 2018306065.382.90$20,006
Apr 20180063.842.90$0
Mar 2018305061.222.79$18,672
Feb 2018303061.782.77$18,719
Jan 2018304062.874.01$19,112
Dec 2017158057.272.92$9,049
Nov 2017153055.423.12$8,479
Oct 2017309049.292.98$15,231
Sep 2017151047.523.09$7,176
Aug 2017300045.373.00$13,611
Jul 2017157043.873.09$6,888
Jun 2017307042.493.09$13,044
May 2017154045.373.26$6,987
Apr 2017301047.933.21$14,427
Mar 2017152046.772.98$7,109
Feb 2017300050.452.95$15,135
Jan 2017154049.413.42$7,609
Dec 2016152048.763.72$7,412
Nov 2016454042.492.64$19,290
Oct 2016302046.193.09$13,949
Sep 20160041.553.10$0
Aug 2016451041.442.92$18,689
Jul 20160041.622.92$0
Jun 2016449045.352.69$20,362
May 2016299042.521.99$12,713
Apr 20160036.561.99$0
Mar 2016296033.011.79$9,771
Feb 2016157026.472.06$4,156
Jan 2016602027.352.36$16,465
Dec 20150032.362.00$0
Nov 2015293038.792.17$11,365
Oct 2015149043.552.43$6,489
Sep 2015455042.992.76$19,560
Aug 2015460040.162.87$18,474
Jul 2015305048.152.95$14,686
Jun 2015146056.152.88$8,198
May 2015144055.212.96$7,950
Apr 2015618049.822.71$30,789
Mar 20151042.892.93$43
Feb 2015305044.662.98$13,621
Jan 2015153043.433.10$6,645
Dec 2014337054.693.59$18,431
Nov 20140070.464.25$0
Oct 2014299078.303.90$23,412
Sep 2014318086.164.05$27,399
Aug 2014436089.394.04$38,974
Jul 20140096.564.18$0
Jun 2014298098.164.74$29,252
May 2014458094.734.73$43,386
Apr 2014146095.944.81$14,007
Mar 20140095.895.06$0
Feb 2014499097.406.19$48,603
Jan 2014414090.404.86$37,426
Dec 2013150091.824.35$13,773
Nov 2013301088.853.74$26,744
Oct 2013313097.423.78$30,492
Sep 20133060104.113.72$31,858
Aug 20131330104.253.52$13,865
Jul 201300102.523.72$0
Jun 2013452094.403.93$42,669
May 2013307094.834.15$29,113
Apr 2013301093.964.28$28,282
Mar 2013308093.623.91$28,835
Feb 2013154091.233.42$14,049
Jan 2013492091.603.42$45,067
Dec 2012153086.773.42$13,276
Nov 2012299086.953.62$25,998
Oct 2012312089.383.40$27,887
Sep 2012328094.672.92$31,052
Aug 2012143092.662.91$13,250
Jul 2012462085.133.02$39,330
Jun 2012116079.822.52$9,259
May 2012156091.612.49$14,291
Apr 20124650101.652.00$47,267
Mar 20121000105.052.22$10,505
Feb 20124390101.102.57$44,383
Jan 2012347098.092.73$34,037
Dec 2011250096.873.24$24,218
Nov 2011342095.723.31$32,736
Oct 2011286084.983.65$24,304
Sep 2011314083.623.99$26,257
Aug 2011149083.404.15$12,427
Jul 2011466094.144.52$43,869
Jun 2011469092.904.64$43,570
May 2011156098.134.40$15,308
Apr 20114680105.964.33$49,589
Mar 2011151096.364.06$14,550
Feb 2011342085.644.18$29,289
Jan 2011640086.504.59$55,360
Dec 2010157085.734.35$13,460
Nov 2010318080.843.80$25,707
Oct 2010162078.103.51$12,652
Sep 2010330072.633.98$23,968
Aug 2010313073.684.42$23,062
Jul 2010153072.554.74$11,100
Jun 2010504070.364.91$35,461
May 20100071.124.24$0
Apr 2010484081.694.12$39,538
Mar 2010157078.394.39$12,307
Feb 2010329073.585.44$24,208
Jan 2010330074.365.96$24,539
Dec 2009340071.445.48$24,290
Nov 2009338074.593.75$25,211
Oct 2009507072.544.11$36,778
Sep 2009297065.543.06$19,465
Aug 2009507067.423.22$34,182
Jul 2009129061.133.46$7,886
Jun 2009339066.163.90$22,428
May 2009650054.743.93$35,581
Apr 2009502046.773.59$23,479
Mar 2009149042.144.06$6,279
Feb 2009533032.814.63$17,488
Jan 2009500035.865.37$17,930
Dec 2008330037.105.98$12,243
Nov 2008508055.496.86$28,189
Oct 2008330075.246.92$24,829
Sep 20083360101.767.88$34,191
Aug 20083220114.228.48$36,779
Jul 20083320131.0811.39$43,519
Jun 20081440131.3313.03$18,912
May 20083270123.1711.57$40,277
Apr 20085190110.3110.45$57,251
Mar 20081630101.909.66$16,610
Feb 2008337092.538.77$31,183
Jan 2008511090.388.21$46,184
Dec 2007332088.337.30$29,326
Nov 2007329091.677.29$30,159
Oct 2007319082.856.92$26,429
Sep 2007174075.846.24$13,196
Aug 2007678069.066.39$46,823
Jul 2007496070.906.39$35,166
Jun 2007329062.007.55$20,398
May 2007508058.747.85$29,840
Apr 2007333059.617.81$19,850
Mar 2007157056.927.30$8,936
Feb 2007522055.108.22$28,762
Jan 2007504050.306.73$25,351
Dec 2006339056.656.92$19,204
Nov 2006319054.207.62$17,290
Oct 2006348054.906.01$19,105
Sep 2006471060.085.04$28,298
Aug 2006157068.717.34$10,787
Jul 2006468069.376.34$32,465
Jun 2006320066.286.38$21,210
May 2006163066.016.42$10,760
Apr 2006526064.397.36$33,869
Mar 2006314056.707.08$17,804
Feb 2006503057.597.75$28,968
Jan 2006330060.598.93$19,995
Dec 2005479054.9413.42$26,316
Nov 2005337054.6910.59$18,431
Oct 2005328058.3413.80$19,136
Sep 2005477061.4512.08$29,312
Aug 2005315061.519.80$19,376
Jul 2005486055.697.84$27,065
Jun 2005317052.337.38$16,589
May 2005326045.226.65$14,742
Apr 2005499049.207.36$24,551
Mar 2005322050.377.15$16,219
Feb 2005333045.226.31$15,058
Jan 2005332043.166.32$14,329
Dec 2004335039.866.75$13,353
Nov 2004504045.286.33$22,821
Oct 2004323049.706.52$16,053
Sep 2004493043.245.28$21,317
Aug 2004330042.375.55$13,982
Jul 2004494038.286.08$18,910
Jun 2004329036.106.43$11,877
May 2004326037.486.49$12,218
Apr 2004646034.475.86$22,268
Mar 2004167034.365.53$5,738
Feb 2004326032.455.51$10,579
Jan 2004491032.036.30$15,727
Dec 2003166030.266.30$5,023
Nov 2003786028.804.60$22,637
Oct 2003655028.174.76$18,451
Sep 2003336026.314.75$8,840
Aug 2003680029.765.13$20,237
Jul 2003305029.415.17$8,970
Jun 2003307028.565.98$8,768
May 2003474026.595.97$12,604
Apr 2003308026.675.41$8,214
Mar 2003472031.146.10$14,698
Feb 2003468033.487.93$15,669
Jan 2003641030.315.58$19,429
Dec 2002476026.914.85$12,809
Nov 2002307024.664.14$7,571
Oct 2002316026.464.23$8,361
Sep 2002451027.443.64$12,375
Aug 2002592025.963.16$15,368
Jul 2002622024.583.06$15,289
Jun 2002307023.733.34$7,285
May 2002672024.663.58$16,572
Apr 2002400023.653.51$9,460
Mar 2002653022.003.10$14,366
Feb 2002363018.222.38$6,614
Jan 2002805017.172.38$13,822
Dec 20010016.932.36$0
Nov 2001316018.072.41$5,710
Oct 2001352019.782.53$6,963
Sep 2001498024.262.25$12,081
Aug 2001292024.873.05$7,262
Jul 2001321023.933.20$7,682
Jun 2001333024.563.82$8,178
May 2001358025.524.31$9,136
Apr 2001532024.685.34$13,130
Mar 2001513024.545.38$12,589
Feb 2001503027.755.77$13,958
Jan 2001335027.478.40$9,202
Dec 2000167026.889.12$4,489
Nov 2000343032.215.66$11,048
Oct 2000343031.235.15$10,712
Sep 2000707031.875.19$22,532
Aug 2000348029.644.54$10,315
Jul 2000516028.534.09$14,721
Jun 2000532029.304.40$15,588
May 2000701027.263.68$19,109
Apr 2000518024.513.12$12,696
Mar 2000531028.422.86$15,091
Feb 2000724027.622.73$19,997
Jan 2000175025.272.48$4,422
Dec 1999522024.282.42$12,674
Nov 1999517023.192.43$11,989
Oct 1999511020.982.80$10,721
Sep 1999363021.752.62$7,895
Aug 1999517019.262.88$9,957
Jul 1999676017.892.37$12,094
Jun 1999338015.942.36$5,388
May 1999341015.792.32$5,384
Apr 1999508015.102.21$7,671
Mar 1999684012.471.84$8,529
Feb 199934609.981.82$3,453
Jan 1999346010.381.90$3,591
Dec 199868509.201.77$6,302
Nov 1998680010.892.19$7,405
Oct 1998509012.421.97$6,322
Sep 1998333012.592.08$4,192
Aug 1998337011.301.91$3,808
Jul 1998626011.742.24$7,349
Jun 1998378011.242.24$4,249
May 1998509012.622.21$6,424
Apr 1998682013.042.51$8,893
Mar 1998513012.802.31$6,566
Feb 1998515013.952.30$7,184
Jan 1998517014.702.15$7,600
Dec 1997521016.322.41$8,503
Nov 1997640018.193.09$11,642
Oct 1997686019.253.15$13,206
Sep 1997499017.742.95$8,852
Aug 1997831017.862.55$14,842
Jul 1997680017.582.25$11,954
Jun 1997504017.242.26$8,689
May 1997517018.972.31$9,807
Apr 1997507017.882.08$9,065
Mar 1997857018.951.94$16,240
Feb 1997707020.492.21$14,486
Jan 1997660023.483.54$15,497
Dec 1996882023.32$20,568
Nov 1996526021.97$11,556
Oct 1996870023.31$20,280
Sep 1996505022.22$11,221
Aug 1996681020.26$13,797
Jul 1996686019.55$13,411
Jun 1996680018.73$12,736
May 1996838019.43$16,282
Apr 1996667021.51$14,347
Mar 1996670019.38$12,985
Feb 1996703016.98$11,937
Jan 19961,070017.07$18,265
Dec 1995536017.19$9,214
Nov 1995881016.00$14,096
Oct 1995345015.43$5,323
Sep 1995694016.18$11,229
Aug 1995830015.92$13,214
Jul 1995802015.24$12,222
Jun 1995822016.41$13,489
May 1995834017.56$14,645
Apr 1995824017.73$14,610
Mar 1995658016.44$10,818
Feb 1995846016.58$14,027
Jan 1995998015.92$15,888
Dec 1994837015.03$12,580
Nov 1994964015.90$15,328
Oct 1994633015.58$9,862
Sep 1994823115.29$12,584
Aug 1994864116.13$13,936
Jul 1994860117.56$15,102
Jun 19941,048117.09$17,910
May 1994350115.88$5,558
Apr 1994880114.14$12,443
Mar 1994711112.46$8,859
Feb 19941,069112.50$13,363
Jan 1994889112.66$11,255
Dec 1993707112.33$8,717
Nov 1993887114.49$12,853
Oct 1993880115.85$13,948
Sep 1993869115.03$13,061
Aug 1993698115.66$10,931
Jul 19931,213115.46$18,753
Jun 1993702116.79$11,787
May 19931,058117.68$18,705
Apr 1993885118.05$15,974
Mar 19931,067118.14$19,355
Feb 1993710117.90$12,709
Jan 1993890116.93$15,068

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.

Apr 2026 — as filed, then multipliedworked
Oil                  312 bbl  × $ 98.93 =    $30,866
Casinghead gas         0 Mcf  × $  2.87 =         $0

────────────────────────────────────────────────────
Month total                                  $30,866

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. 09/O/6241 is the state's own key, not one this site invented.