SWILLEY SAND /COCKFIELD/ UNIT

Operated by MBX OPERATING LLC (P-5 101199) in the MOSS HILL, NORTH (COCKFIELD) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 6366District 03Field 63192500OilCasinghead gasSaveExport
Value, all time
$11.2 M
Jan 1993 – May 2026
Value, last 12 filed months
$374 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 4 leases and 8 wells, and the rule below applies to all of them.

Discovered
1956-12-17
as the register files it
Field class
Oil and gas
the register's own label
Between wells
933 ft
minimum
From a lease line
467 ft
minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 1958-08-18.

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
OilDisposition202,372 bbl$11,168,654
Casinghead gasProduction40,291 Mcf$61,267
Total$11,229,921

27,171 Mcf of this lease's gas, across 41 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 (5)

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 30.3374, -94.7447. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.4 miles.

30.33769, -94.74460 · 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
40.0%
2 of 5 wells
With a plug date
20.0%
1 of 5 wells
Median depth
6,947 ft
4 wells filed one
Completion to plug
37.6 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
240.0%
A plug date is filed
120.0%
BothOn the schedule and plugged. Neither fact cancels the other.
120.0%
NeitherNo plug date, and not on the schedule.
360.0%

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 6,848 and 8,003 ft, median 6,947 ft, over the 4 wells that filed a depth.

Completions filed
Jun 1957 – Sep 2005
3 of 5 wells; 2 filed none
Plug dates filed
Jan 1995
1 of 5 wells; 4 filed none

Last completion to plug: a median of 37.6 years across the 1 well that filed both dates, with the middle half between 37.6 years and 37.6 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

5 wells

42-2910030518,003 ft
42-291003072
42-2910031146,924 ftSep 2005
42-2910030936,848 ftSep 1957Yes
42-2918172856,969 ftJun 1957Jan 1995Yes

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 20261820106.413.05$19,367
Apr 2026161098.932.87$15,928
Mar 2026347089.753.15$31,143
Feb 2026355063.503.75$22,543
Jan 2026669059.138.00$39,558
Dec 2025171056.664.41$9,689
Nov 2025665058.593.93$38,962
Oct 2025495059.383.30$29,393
Sep 2025814062.743.08$51,070
Aug 2025707063.933.01$45,199
Jul 2025537066.743.32$35,839
Jun 2025532066.483.13$35,367
May 2025692060.553.23$41,901
Apr 2025704062.363.54$43,901
Mar 2025498067.704.27$33,715
Feb 2025882070.884.34$62,516
Jan 20250074.324.28$0
Dec 20240068.993.12$0
Nov 2024832069.052.20$57,450
Oct 2024535071.372.28$38,183
Sep 2024721069.612.36$50,189
Aug 2024865075.632.06$65,420
Jul 20241,058079.932.15$84,566
Jun 20241,015078.082.63$79,251
May 2024683078.812.20$53,827
Apr 2024848084.451.66$71,614
Mar 2024994080.301.55$79,818
Feb 2024673076.091.78$51,209
Jan 20241,057073.023.30$77,182
Dec 2023910071.262.61$64,847
Nov 2023672077.892.81$52,342
Oct 20231,165085.443.09$99,538
Sep 2023825089.042.74$73,458
Aug 20231,182080.522.67$95,175
Jul 20231,163074.852.64$87,051
Jun 2023853068.962.26$58,823
May 2023502070.622.23$35,451
Apr 20230078.122.24$0
Mar 2023700072.852.39$50,995
Feb 2023697075.112.47$52,352
Jan 2023515076.533.39$39,413
Dec 2022865076.415.73$66,095
Nov 2022659085.005.65$56,015
Oct 2022687087.185.86$59,893
Sep 2022856084.888.16$72,657
Aug 2022184094.529.13$17,392
Jul 20223260101.587.54$33,115
Jun 20227940115.097.98$91,381
May 20228290109.378.43$90,668
Apr 20225350104.226.84$55,758
Mar 20228020108.885.08$87,322
Feb 2022636091.054.86$57,908
Jan 2022692081.844.54$56,633
Dec 2021678071.323.90$48,355
Nov 2021511077.435.24$39,567
Oct 2021509079.795.71$40,613
Sep 2021685069.865.35$47,854
Aug 2021691066.024.22$45,620
Jul 2021706070.783.98$49,971
Jun 2021729069.493.38$50,658
May 2021855063.483.02$54,275
Apr 2021861060.362.76$51,970
Mar 2021682061.302.72$41,807
Feb 2021638057.805.55$36,876
Jan 2021661050.412.81$33,321
Dec 2020493044.642.68$22,008
Nov 2020832038.772.71$32,257
Oct 2020840036.972.48$31,055
Sep 2020672037.091.99$24,924
Aug 2020492039.982.39$19,670
Jul 2020492038.371.83$18,878
Jun 2020810034.901.69$28,269
May 2020838016.921.81$14,179
Apr 2020815014.751.80$12,021
Mar 20201,000030.341.86$30,340
Feb 2020474049.881.98$23,643
Jan 2020612057.252.09$35,037
Dec 2019839059.012.30$49,509
Nov 2019829055.302.75$45,844
Oct 2019821053.472.42$43,899
Sep 2019667055.052.66$36,718
Aug 2019865053.112.30$45,940
Jul 2019782056.272.46$44,003
Jun 2019354052.782.49$18,684
May 20193156258.482.74$18,591
Apr 20197036062.632.75$44,194
Mar 201906256.803.06$190
Feb 20195065650.852.79$25,886
Jan 20196956246.033.23$32,191
Dec 20183583446.594.19$16,822
Nov 201801852.934.24$76
Oct 20181782261.443.40$11,011
Sep 20181786059.543.11$10,785
Aug 20181836259.403.07$11,060
Jul 20181826265.142.93$12,037
Jun 2018339060.183.08$20,401
May 20183536265.382.90$23,259
Apr 20185206063.842.90$33,371
Mar 20185176261.222.79$31,824
Feb 20185435661.782.77$33,701
Jan 20183576262.874.01$22,693
Dec 20177146257.272.92$41,072
Nov 201706055.423.12$187
Oct 20175016249.292.98$24,879
Sep 20176416047.523.09$30,646
Aug 20176946245.373.00$31,673
Jul 20173376243.873.09$14,976
Jun 20178696042.493.09$37,109
May 20173676245.373.26$16,853
Apr 20176726047.933.21$32,402
Mar 20176406246.772.98$30,118
Feb 20173065650.452.95$15,603
Jan 20176206249.413.42$30,846
Dec 201606248.763.72$231
Nov 20166606042.492.64$28,202
Oct 20166106246.193.09$28,368
Sep 20163356041.553.10$14,105
Aug 20163173241.442.92$13,230
Jul 20160041.622.92$0
Jun 20160045.352.69$0
May 20161846242.521.99$7,947
Apr 20161,4116036.561.99$51,706
Mar 201601833.011.79$32
Feb 20160026.472.06$0
Jan 20160027.352.36$0
Dec 20151946232.362.00$6,402
Nov 20155246038.792.17$20,456
Oct 20158946243.552.43$39,084
Sep 20157046042.992.76$30,430
Aug 20157566240.162.87$30,539
Jul 20153386248.152.95$16,457
Jun 20157736056.152.88$43,577
May 20153736255.212.96$20,777
Apr 20155526049.822.71$27,663
Mar 20157386242.892.93$31,835
Feb 20156605644.662.98$29,642
Jan 20156696243.433.10$29,247
Dec 20145176254.693.59$28,497
Nov 20146886070.464.25$48,732
Oct 201406278.303.90$242
Sep 20147016086.164.05$60,641
Aug 201406289.394.04$250
Jul 20145086296.564.18$49,312
Jun 20145156098.164.74$50,837
May 20146306294.734.73$59,973
Apr 20143346095.944.81$32,333
Mar 20146466295.895.06$62,258
Feb 20147065697.406.19$69,111
Jan 20141,0066290.404.86$91,244
Dec 20135896291.824.35$54,352
Nov 20136926088.853.74$61,709
Oct 20135656297.423.78$55,277
Sep 201318960104.113.72$19,900
Aug 201353962104.253.52$56,409
Jul 20131,14360102.523.72$117,403
Jun 20135676094.403.93$53,761
May 20136966294.834.15$66,259
Apr 20136876093.964.28$64,807
Mar 20133786293.623.91$35,631
Feb 20136795691.233.42$62,137
Jan 201306291.603.42$212
Dec 20127606286.773.42$66,157
Nov 20125636086.953.62$49,170
Oct 20123776289.383.40$33,907
Sep 20126856094.672.92$65,024
Aug 20125676292.662.91$52,719
Jul 20125566285.133.02$47,520
Jun 201206079.822.52$151
May 20123486291.612.49$32,035
Apr 201272960101.652.00$74,223
Mar 201238662105.052.22$40,687
Feb 201218658101.102.57$18,954
Jan 201206298.092.73$170
Dec 20115556296.873.24$53,964
Nov 20115216095.723.31$50,069
Oct 20115446284.983.65$46,455
Sep 20117296083.623.99$61,198
Aug 20111796283.404.15$15,186
Jul 20117386294.144.52$69,755
Jun 20117666092.904.64$71,440
May 20110098.134.40$0
Apr 201177860105.964.33$82,697
Mar 20117786296.364.06$75,220
Feb 20115965685.644.18$51,276
Jan 20115876286.504.59$51,060
Dec 20103756285.734.35$32,418
Nov 20109546080.843.80$77,349
Oct 20104086278.103.51$32,082
Sep 20105776072.633.98$42,146
Aug 20105726273.684.42$42,419
Jul 20107096272.554.74$51,732
Jun 20103316070.364.91$23,584
May 20108886271.124.24$63,417
Apr 20103516081.694.12$28,921
Mar 20105286278.394.39$41,662
Feb 20107025673.585.44$51,958
Jan 20105546274.365.96$41,565
Dec 20091816271.445.48$13,271
Nov 20097406074.593.75$55,422
Oct 20097136272.544.11$51,976
Sep 20097296065.543.06$47,963
Aug 20097266267.423.22$49,146
Jul 20097026261.133.46$43,128
Jun 20097086066.163.90$47,075
May 20095126254.743.93$28,270
Apr 20093556046.773.59$16,819
Mar 20093536242.144.06$15,127
Feb 20093515632.814.63$11,776
Jan 20099006235.865.37$32,607
Dec 20083546037.105.98$13,492
Nov 20087236055.496.86$40,531
Oct 20087136275.246.92$54,075
Sep 200858260101.767.88$59,697
Aug 200819262114.228.48$22,456
Jul 200833262131.0811.39$44,225
Jun 200872160131.3313.03$95,471
May 200871162123.1711.57$88,291
Apr 200855060110.3110.45$61,298
Mar 200869662101.909.66$71,522
Feb 200805892.538.77$509
Jan 2008355490.388.21$32,118
Dec 20073562888.337.30$31,650
Nov 20073476091.677.29$32,247
Oct 20075284082.856.92$44,022
Sep 20071,0646075.846.24$81,068
Aug 20075466269.066.39$38,103
Jul 20076814470.906.39$48,564
Jun 20075155862.007.55$32,368
May 20077646258.747.85$45,364
Apr 200706059.617.81$468
Mar 20071886256.927.30$11,154
Feb 20075105655.108.22$28,561
Jan 20073386250.306.73$17,418
Dec 20067176256.656.92$41,047
Nov 20065476054.207.62$30,104
Oct 200605654.906.01$337
Sep 20065454660.085.04$32,975
Aug 20067066268.717.34$48,964
Jul 20067306269.376.34$51,033
Jun 200603066.286.38$192
May 20065476066.016.42$36,493
Apr 20067266064.397.36$47,189
Mar 20061756256.707.08$10,362
Feb 20063573857.597.75$20,854
Jan 20067136260.598.93$43,755
Dec 20053583854.9413.42$20,178
Nov 20051846054.6910.59$10,698
Oct 20053606258.3413.80$21,858
Sep 20055426061.4512.08$34,031
Aug 20055426261.519.80$33,946
Jul 20051882255.697.84$10,642
Jun 20055516052.337.38$29,277
May 20057386245.226.65$33,785
Apr 20051922449.207.36$9,623
Mar 20057114850.377.15$36,157
Feb 20053513645.226.31$16,099
Jan 200536243.166.32$521
Dec 20046756239.866.75$27,324
Nov 20041775645.286.33$8,369
Oct 20040049.706.52$0
Sep 20043556043.245.28$15,667
Aug 2004906042.375.55$38,387
Jul 20045263438.286.08$20,342
Jun 2004116036.106.43$783
May 20046766237.486.49$25,739
Apr 20047225634.475.86$25,215
Mar 20046366234.365.53$22,196
Feb 200405832.455.51$320
Jan 20046906232.036.30$22,491
Dec 20035006230.266.30$15,521
Nov 20032076028.804.60$6,237
Oct 20036184628.174.76$17,628
Sep 20033836026.314.75$10,362
Aug 20034066229.765.13$12,401
Jul 20038886229.415.17$26,437
Jun 2003306028.565.98$1,216
May 20035304426.595.97$14,356
Apr 20035485026.675.41$14,886
Mar 20035106231.146.10$16,259
Feb 20033752233.487.93$12,729
Jan 2003862030.315.58$2,718
Dec 20025542626.914.85$15,034
Nov 200205224.664.14$215
Oct 20023426226.464.23$9,312
Sep 20021875827.443.64$5,342
Aug 20026922825.963.16$18,053
Jul 200205824.583.06$178
Jun 20025044223.733.34$12,100
May 20025315224.663.58$13,281
Apr 20025766023.653.51$13,833
Mar 20027725622.003.10$17,158
Feb 20029405018.222.38$17,246
Jan 200203817.172.38$90
Dec 20016356216.932.36$10,897
Nov 20013515218.072.41$6,468
Oct 20013564619.782.53$7,158
Sep 20016346024.262.25$15,516
Aug 20017056224.873.05$17,723
Jul 20015356223.933.20$13,001
Jun 20015274824.563.82$13,127
May 20011,0846225.524.31$27,931
Apr 20017695624.685.34$19,278
Mar 20016065824.545.38$15,183
Feb 20015305627.755.77$15,030
Jan 20015004027.478.40$14,071
Dec 20002365026.889.12$6,800
Nov 2000178232.215.66$5,745
Oct 20004394631.235.15$13,947
Sep 20007225631.875.19$23,301
Aug 20007056229.644.54$21,178
Jul 20008886228.534.09$25,588
Jun 20008755229.304.40$25,866
May 20008396027.263.68$23,092
Apr 20007195624.513.12$17,797
Mar 2000170028.422.86$4,831
Feb 20005505827.622.73$15,349
Jan 20007124025.272.48$18,091
Dec 19991695424.282.42$4,234
Nov 19999016023.192.43$21,040
Oct 19995435420.982.80$11,544
Sep 19991791821.752.62$3,940
Aug 19991871419.262.88$3,642
Jul 1999206217.892.37$505
Jun 19995435215.942.36$8,778
May 19995483415.792.32$8,732
Apr 19990815.102.21$18
Mar 19990212.471.84$4
Feb 1999069.981.82$11
Jan 199901210.381.90$23
Dec 19984109.201.77$55
Nov 199814410.892.19$161
Oct 19980012.421.97$0
Sep 19980012.592.08$0
Aug 19980011.301.91$0
Jul 19980011.742.24$0
Jun 19980011.242.24$0
May 19980012.622.21$0
Apr 19980013.042.51$0
Mar 19980012.802.31$0
Feb 1998176213.952.30$2,460
Jan 19980014.702.15$0
Dec 19970016.322.41$0
Nov 19970818.193.09$25
Oct 199701219.253.15$38
Sep 19973534217.742.95$6,386
Aug 199705617.862.55$143
Jul 19970017.582.25$0
Jun 1997187017.242.26$3,224
May 19970018.972.31$0
Apr 19971017.882.08$18
Mar 19970018.951.94$0
Feb 1997180020.492.21$3,688
Jan 19970023.483.54$0
Dec 1996187023.32$4,361
Nov 19960021.97$0
Oct 19960023.31$0
Sep 1996487022.22$10,821
Aug 19960020.26$0
Jul 19963621719.55$7,077
Jun 1996357018.73$6,687
May 199670235319.43$13,640
Apr 19967164121.51$15,401
Mar 1996740019.38$14,341
Feb 199671231716.98$12,090
Jan 19966876017.07$11,727
Dec 19955496017.19$9,437
Nov 19957136016.00$11,408
Oct 199516947615.43$2,608
Sep 199512236716.18$1,974
Aug 199518071915.92$2,866
Jul 199570623515.24$10,759
Jun 199570312016.41$11,536
May 199553912917.56$9,465
Apr 19953562,17017.73$6,312
Mar 19955481,17916.44$9,009
Feb 19957083,40016.58$11,739
Jan 199552152115.92$8,294
Dec 199453663115.03$8,056
Nov 199470835115.90$11,257
Oct 19941,0721,14415.58$16,702
Sep 19943277415.29$5,000
Aug 199470837116.13$11,420
Jul 199490079317.56$15,804
Jun 199489265717.09$15,244
May 199471631115.88$11,370
Apr 199435724314.14$5,048
Mar 199435627212.46$4,436
Feb 199435310312.50$4,413
Jan 199471726812.66$9,077
Dec 199371749412.33$8,841
Nov 19933583714.49$5,187
Oct 19931,04410415.85$16,547
Sep 19935577815.03$8,372
Aug 199370571415.66$11,040
Jul 19931,2451,08315.46$19,248
Jun 19935452,26316.79$9,151
May 19937234,26317.68$12,783
Apr 19937261,79118.05$13,104
Mar 19931,13742518.14$20,625
Feb 199393526117.90$16,737
Jan 199392621616.93$15,677

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                  182 bbl  × $106.41 =    $19,367
Casinghead gas         0 Mcf  × $  3.05 =         $0

────────────────────────────────────────────────────
Month total                                  $19,367

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. 03/O/6366 is the state's own key, not one this site invented.