HALFMAN, E. A.

Operated by LAVANCO ENERGY, LTD. (P-5 489783) in the HALFMAN (STRAWN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 10043District 7CField 38170500NGPA filingOilCasinghead gasSaveExport
Value, all time
$870 k
Jan 1993 – Jun 2023
Value, last 12 filed months
$18 k
at the published price for each month
Months reported
366
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 leases and 11 wells, and the rule below applies to all of them.

Discovered
1969-09-26
as the register files it
Field class
Oil
the register's own label
Between wells
no field rule filed
From a lease line
no field rule filed

Severance-tax incentive filings

Applications the operator filed to have this lease's gas taxed at a reduced state rate. A filing is an application, and this page never calls one a reduction that was granted.

ProgrammeFilingsWith an approval dateDatedDocket
NGPA1none

This says nothing about a royalty. A severance tax is charged to the operator. Whether a reduced rate reaches a royalty owner depends on the wording of the lease instrument, which is a private contract this site does not hold.

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
OilDisposition17,941 bbl$717,137
Casinghead gasProduction45,943 Mcf$152,521
Total$869,659

9,051 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 (1)

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 31.3009, -100.2524. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.30092, -100.25245 · 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
100.0%
1 of 1 wells
With a plug date
100.0%
1 of 1 wells
Median depth
5,280 ft
1 wells filed one
Completion to plug
40.1 years
median over 1 well

What the state filed about each well

On the RRC proration schedule
1100.0%
A plug date is filed
1100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
1100.0%
NeitherNo plug date, and not on the schedule.
00.0%

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 5,280 ft.

Completions filed
Mar 1983
1 of 1 wells
Plug dates filed
Apr 2023
1 of 1 wells

Last completion to plug: a median of 40.1 years across the 1 well that filed both dates, with the middle half between 40.1 years and 40.1 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

1 well

42-4513115015,280 ftMar 1983Apr 2023Yes

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 (366)

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

366 months

Jun 20230068.962.26$0
May 20230070.622.23$0
Apr 202348078.122.24$3,750
Mar 20230072.852.39$0
Feb 202335075.112.47$2,629
Jan 202334076.533.39$2,602
Dec 20220076.415.73$0
Nov 202235085.005.65$2,975
Oct 20220087.185.86$0
Sep 202236084.888.16$3,056
Aug 202236094.529.13$3,403
Jul 202200101.587.54$0
Jun 2022360115.097.98$4,143
May 2022350109.378.43$3,828
Apr 202200104.226.84$0
Mar 2022380108.885.08$4,137
Feb 202235091.054.86$3,187
Jan 202237081.844.54$3,028
Dec 20210071.323.90$0
Nov 202137077.435.24$2,865
Oct 202136079.795.71$2,872
Sep 202135069.865.35$2,445
Aug 20210066.024.22$0
Jul 202134070.783.98$2,407
Jun 202134069.493.38$2,363
May 202135063.483.02$2,222
Apr 202134060.362.76$2,052
Mar 202136061.302.72$2,207
Feb 20210057.805.55$0
Jan 202137050.412.81$1,865
Dec 202051044.642.68$2,277
Nov 202035038.772.71$1,357
Oct 202036036.972.48$1,331
Sep 202035037.091.99$1,298
Aug 202010039.982.39$400
Jul 202072038.371.83$2,763
Jun 202073034.901.69$2,548
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 202037049.881.98$1,846
Jan 202002157.252.09$44
Dec 2019383259.012.30$2,316
Nov 2019384755.302.75$2,231
Oct 2019395753.472.42$2,223
Sep 201905155.052.66$136
Aug 2019385553.112.30$2,145
Jul 20193615356.272.46$2,402
Jun 20193813452.782.49$2,339
May 20193815058.482.74$2,633
Apr 2019013562.632.75$371
Mar 2019559056.803.06$3,400
Feb 2019735350.852.79$3,860
Jan 2019013146.033.23$423
Dec 20183813346.594.19$2,327
Nov 2018011652.934.24$492
Oct 20185512061.443.40$3,787
Sep 20187413959.543.11$4,838
Aug 2018014459.403.07$442
Jul 20183413365.142.93$2,605
Jun 2018013760.183.08$422
May 20183714165.382.90$2,828
Apr 20187112463.842.90$4,892
Mar 2018013461.222.79$373
Feb 20183812561.782.77$2,693
Jan 20183811362.874.01$2,842
Dec 2017012257.272.92$356
Nov 20173811455.423.12$2,461
Oct 20173712949.292.98$2,209
Sep 2017379347.523.09$2,045
Aug 201737045.373.00$1,679
Jul 201701643.873.09$49
Jun 2017374442.493.09$1,708
May 20173813045.373.26$2,148
Apr 20173614747.933.21$2,198
Mar 20174515746.772.98$2,573
Feb 2017014650.452.95$431
Jan 20173415749.413.42$2,217
Dec 20163714948.763.72$2,359
Nov 2016014642.492.64$386
Oct 20163715846.193.09$2,197
Sep 20163715041.553.10$2,002
Aug 20163815941.442.92$2,040
Jul 2016017641.622.92$515
Jun 20163717045.352.69$2,135
May 20163917842.521.99$2,013
Apr 20163816536.561.99$1,718
Mar 20163618133.011.79$1,513
Feb 20163716726.472.06$1,324
Jan 20163816727.352.36$1,434
Dec 20153917132.362.00$1,604
Nov 2015016638.792.17$360
Oct 20153913743.552.43$2,031
Sep 20153614442.992.76$1,945
Aug 2015377040.162.87$1,687
Jul 2015375448.152.95$1,941
Jun 2015386756.152.88$2,327
May 2015377655.212.96$2,267
Apr 2015376849.822.71$2,027
Mar 2015386842.892.93$1,829
Feb 2015010144.662.98$301
Jan 20157711543.433.10$3,701
Dec 2014011654.693.59$417
Nov 20143811470.464.25$3,162
Oct 20143910878.303.90$3,475
Sep 20143813986.164.05$3,836
Aug 20143911389.394.04$3,942
Jul 20143812696.564.18$4,196
Jun 20143912298.164.74$4,406
May 20143712194.734.73$4,077
Apr 20143911695.944.81$4,300
Mar 201408095.895.06$405
Feb 20143811097.406.19$4,382
Jan 20147711490.404.86$7,515
Dec 2013013191.824.35$570
Nov 20133914488.853.74$4,003
Oct 20133918097.423.78$4,480
Sep 2013045104.113.72$167
Aug 201334174104.253.52$4,157
Jul 201338327102.523.72$5,111
Jun 20133815394.403.93$4,189
May 2013389394.834.15$3,989
Apr 20133814993.964.28$4,209
Mar 20133910493.623.91$4,058
Feb 20136614891.233.42$6,527
Jan 2013014291.603.42$486
Dec 20123913086.773.42$3,829
Nov 20123716086.953.62$3,797
Oct 20123815289.383.40$3,913
Sep 20123714094.672.92$3,911
Aug 20123714992.662.91$3,862
Jul 20123715185.133.02$3,606
Jun 20123710679.822.52$3,220
May 20123813491.612.49$3,815
Apr 2012093101.652.00$186
Mar 201277130105.052.22$8,378
Feb 201237121101.102.57$4,052
Jan 20123910698.092.73$4,115
Dec 20113612096.873.24$3,876
Nov 2011399895.723.31$4,058
Oct 20113912584.983.65$3,770
Sep 20113811483.623.99$3,632
Aug 20117714083.404.15$7,003
Jul 2011014694.144.52$660
Jun 20113813592.904.64$4,157
May 20113714398.134.40$4,261
Apr 20113596105.964.33$4,125
Mar 20113713596.364.06$4,113
Feb 2011388085.644.18$3,589
Jan 20113711686.504.59$3,733
Dec 20103711685.734.35$3,676
Nov 20103912680.843.80$3,631
Oct 20103913178.103.51$3,506
Sep 20103710372.633.98$3,097
Aug 20103713173.684.42$3,305
Jul 2010386472.554.74$3,060
Jun 20103811070.364.91$3,214
May 20103912571.124.24$3,303
Apr 20103811981.694.12$3,595
Mar 2010756678.394.39$6,169
Feb 2010394173.585.44$3,093
Jan 201001774.365.96$101
Dec 20093911171.445.48$3,395
Nov 20093512274.593.75$3,068
Oct 20093711472.544.11$3,153
Sep 20093713665.543.06$2,842
Aug 20093712667.423.22$2,900
Jul 2009373061.133.46$2,366
Jun 20093713366.163.90$2,966
May 20093813154.743.93$2,594
Apr 20093411846.773.59$2,014
Mar 20093811942.144.06$2,084
Feb 2009010532.814.63$486
Jan 20097810535.865.37$3,361
Dec 20083811837.105.98$2,115
Nov 2008010055.496.86$686
Oct 200867475.246.92$5,069
Sep 20083954101.767.88$4,394
Aug 200810114.228.48$114
Jul 20083843131.0811.39$5,471
Jun 200837133131.3313.03$6,593
May 200838139123.1711.57$6,289
Apr 20087785110.3110.45$9,383
Mar 20083914101.909.66$4,109
Feb 20083810292.538.77$4,411
Jan 20083910590.388.21$4,386
Dec 20073811288.337.30$4,174
Nov 2007010991.677.29$795
Oct 20073713482.856.92$3,993
Sep 20077713275.846.24$6,664
Aug 2007014269.066.39$907
Jul 20077510070.906.39$5,956
Jun 20070362.007.55$23
May 2007735758.747.85$4,735
Apr 2007013659.617.81$1,062
Mar 20077613556.927.30$5,312
Feb 20073712155.108.22$3,033
Jan 20073812850.306.73$2,772
Dec 20063813556.656.92$3,087
Nov 20063912854.207.62$3,089
Oct 20063713954.906.01$2,867
Sep 20063812460.085.04$2,908
Aug 2006013068.717.34$954
Jul 20063713369.376.34$3,410
Jun 20063817966.286.38$3,661
May 2006374766.016.42$2,744
Apr 20063812564.397.36$3,367
Mar 20063912856.707.08$3,118
Feb 20063712557.597.75$3,100
Jan 20067312560.598.93$5,540
Dec 2005398754.9413.42$3,310
Nov 2005388854.6910.59$3,010
Oct 20053813458.3413.80$4,066
Sep 20053611561.4512.08$3,601
Aug 20053813161.519.80$3,621
Jul 2005367755.697.84$2,609
Jun 2005384452.337.38$2,313
May 2005361545.226.65$1,728
Apr 20053715449.207.36$2,954
Mar 20057312750.377.15$4,586
Feb 20053714345.226.31$2,576
Jan 20053813943.166.32$2,519
Dec 20043714039.866.75$2,420
Nov 20043713445.286.33$2,524
Oct 20043816049.706.52$2,931
Sep 20047614243.245.28$4,037
Aug 20043716042.375.55$2,456
Jul 20043615938.286.08$2,345
Jun 20043813236.106.43$2,221
May 20047513337.486.49$3,675
Apr 20043713234.475.86$2,049
Mar 20043912934.365.53$2,053
Feb 20043811832.455.51$1,883
Jan 20047514032.036.30$3,284
Dec 20033911730.266.30$1,917
Nov 20033712728.804.60$1,649
Oct 20033712828.174.76$1,652
Sep 20037115026.314.75$2,580
Aug 20033615529.765.13$1,866
Jul 20037415629.415.17$2,983
Jun 20033615528.565.98$1,956
May 20033717026.595.97$1,999
Apr 20033415926.675.41$1,767
Mar 20037112631.146.10$2,979
Feb 2003376733.487.93$1,770
Jan 20033511030.315.58$1,675
Dec 20027415426.914.85$2,739
Nov 20023715624.664.14$1,558
Oct 20023817126.464.23$1,729
Sep 20023618027.443.64$1,642
Aug 20023424425.963.16$1,655
Jul 20023630724.583.06$1,825
Jun 20023613123.733.34$1,292
May 20023715324.663.58$1,461
Apr 20023512823.653.51$1,277
Mar 20023714922.003.10$1,276
Feb 20023812918.222.38$999
Jan 20023813117.172.38$964
Dec 20013714616.932.36$972
Nov 20013714618.072.41$1,020
Oct 20013811519.782.53$1,042
Sep 20013713424.262.25$1,199
Aug 20013614524.873.05$1,338
Jul 20013812123.933.20$1,296
Jun 20013512324.563.82$1,330
May 20017513625.524.31$2,500
Apr 20013812624.685.34$1,610
Mar 20017516324.545.38$2,717
Feb 20013517027.755.77$1,952
Jan 20013716127.478.40$2,369
Dec 20003814626.889.12$2,353
Nov 20003812632.215.66$1,937
Oct 20003622031.235.15$2,256
Sep 20006916831.875.19$3,070
Aug 20003713329.644.54$1,701
Jul 20003615228.534.09$1,649
Jun 20003815629.304.40$1,799
May 20003725727.263.68$1,954
Apr 20007320224.513.12$2,419
Mar 20003714728.422.86$1,472
Feb 20003715327.622.73$1,439
Jan 20003621925.272.48$1,453
Dec 19997717524.282.42$2,294
Nov 19997620923.192.43$2,271
Oct 199911220820.982.80$2,933
Sep 19993714521.752.62$1,184
Aug 199910515619.262.88$2,471
Jul 199910915317.892.37$2,313
Jun 19997413715.942.36$1,503
May 199910913215.792.32$2,027
Apr 19997514815.102.21$1,459
Mar 19997415112.471.84$1,200
Feb 19991091349.981.82$1,331
Jan 199910813110.381.90$1,370
Dec 1998741209.201.77$894
Nov 19987511410.892.19$1,066
Oct 199811114512.421.97$1,664
Sep 19987514712.592.08$1,250
Aug 199814540211.301.91$2,405
Jul 19987044411.742.24$1,815
Jun 19983314511.242.24$695
May 19987224312.622.21$1,445
Apr 199810715813.042.51$1,791
Mar 199810616312.802.31$1,733
Feb 199810520713.952.30$1,941
Jan 199810121014.702.15$1,937
Dec 199713940016.322.41$3,233
Nov 19973541218.193.09$1,909
Oct 199711116419.253.15$2,653
Sep 19973716917.742.95$1,156
Aug 19977312817.862.55$1,631
Jul 199710947417.582.25$2,981
Jun 19976815717.242.26$1,527
May 19977614918.972.31$1,786
Apr 19977815917.882.08$1,726
Mar 19975215618.951.94$1,288
Feb 19977812220.492.21$1,867
Jan 19977613623.483.54$2,266
Dec 19967417023.32$1,726
Nov 199610016421.97$2,197
Oct 199614021623.31$3,263
Sep 199613415522.22$2,977
Aug 199611918020.26$2,411
Jul 199613817219.55$2,698
Jun 199613916318.73$2,603
May 19965017719.43$972
Apr 1996518321.51$1,097
Mar 19967510819.38$1,454
Feb 19967511416.98$1,274
Jan 199610216417.07$1,741
Dec 19957513617.19$1,289
Nov 199510316616.00$1,648
Oct 199510218015.43$1,574
Sep 19959521716.18$1,537
Aug 19959724015.92$1,544
Jul 199512925215.24$1,966
Jun 19959618516.41$1,575
May 19959721017.56$1,703
Apr 199513019717.73$2,305
Mar 19959219916.44$1,512
Feb 19959417116.58$1,559
Jan 199510718315.92$1,703
Dec 19949730715.03$1,458
Nov 19949720815.90$1,542
Oct 19949720715.58$1,511
Sep 199413020715.29$1,988
Aug 19949521616.13$1,532
Jul 1994708117.56$1,229
Jun 199410620117.09$1,812
May 199411019415.88$1,747
Apr 199411421614.14$1,612
Mar 19949726512.46$1,209
Feb 19949023512.50$1,125
Jan 19949528812.66$1,203
Dec 199311429712.33$1,406
Nov 199310028814.49$1,449
Oct 19939529315.85$1,506
Sep 199311020615.03$1,653
Aug 19939310115.66$1,456
Jul 199311817115.46$1,824
Jun 199311017316.79$1,847
May 199310617317.68$1,874
Apr 199310213018.05$1,841
Mar 199311815918.14$2,141
Feb 19938114017.90$1,450
Jan 1993859316.93$1,439

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 2023 — as filed, then multipliedworked
Oil                   48 bbl  × $ 78.12 =     $3,750
Casinghead gas         0 Mcf  × $  2.24 =         $0

────────────────────────────────────────────────────
Month total                                   $3,750

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/10043 is the state's own key, not one this site invented.