HALFMANN, DELBERT

Operated by XTO ENERGY INC. (P-5 945936) in the SAINT LAWRENCE (STRAWN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Gas lease lease 147951District 08Field 79689700CondensateGasSaveExport
Value, all time
$740 k
Dec 1993 – May 2026
Value, last 12 filed months
$4 k
at the published price for each month
Months reported
390
no gaps in the span
Streams
2
condensate, 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 55 leases and 65 wells, and the rule below applies to all of them.

Discovered
1983-08-10
as the register files it
Field class
Oil and gas
the register's own label
Between wells
1,320 ft
minimum
From a lease line
660 ft
minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 1991-03-01.

The Commission's schedule remark for this field reads: OPERATOR REQUEST (COSTILLA PETROLEUM CORP.)

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
CondensateDisposition3,209 bbl$108,680
GasProduction350,579 Mcf$631,231
Total$739,910

156,043 Mcf of this lease's gas, across 37 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 31.7476, -101.5512. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.74764, -101.55125 · 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
0.0%
0 of 1 wells
With a plug date
0.0%
0 of 1 wells
Median depth
12,100 ft
1 wells filed one
Completion to plug
no well filed both dates

What the state filed about each well

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

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 12,100 ft.

Completions filed
Feb 1996
1 of 1 wells

1 well

42-17331840212,100 ftFeb 1996

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 (390)

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

390 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 202556063.933.01$3,580
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 20250074.324.28$0
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 20240184.451.66$2
Mar 20240080.301.55$0
Feb 20240076.091.78$0
Jan 20240073.023.30$0
Dec 20230071.262.61$0
Nov 20230877.892.81$22
Oct 20230085.443.09$0
Sep 20230089.042.74$0
Aug 20230080.522.67$0
Jul 20230074.852.64$0
Jun 20230668.962.26$14
May 20230070.622.23$0
Apr 20230078.122.24$0
Mar 202309072.852.39$215
Feb 20231075.112.47$75
Jan 202301976.533.39$64
Dec 20220076.415.73$0
Nov 20220085.005.65$0
Oct 20220087.185.86$0
Sep 20220084.888.16$0
Aug 20220094.529.13$0
Jul 202200101.587.54$0
Jun 202200115.097.98$0
May 202200109.378.43$0
Apr 202200104.226.84$0
Mar 202200108.885.08$0
Feb 20220091.054.86$0
Jan 20220081.844.54$0
Dec 20210071.323.90$0
Nov 20210077.435.24$0
Oct 20210079.795.71$0
Sep 20210069.865.35$0
Aug 20210066.024.22$0
Jul 20210070.783.98$0
Jun 20210069.493.38$0
May 20210063.483.02$0
Apr 20210060.362.76$0
Mar 20210061.302.72$0
Feb 20210057.805.55$0
Jan 20210050.412.81$0
Dec 20200044.642.68$0
Nov 20200038.772.71$0
Oct 20200036.972.48$0
Sep 20200037.091.99$0
Aug 20200039.982.39$0
Jul 20200038.371.83$0
Jun 20200034.901.69$0
May 20200016.921.81$0
Apr 20200014.751.80$0
Mar 20200030.341.86$0
Feb 20200049.881.98$0
Jan 20200057.252.09$0
Dec 20190059.012.30$0
Nov 201979455.302.75$4,380
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190752.782.49$17
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 20190056.803.06$0
Feb 20190050.852.79$0
Jan 2019110746.033.23$5,086
Dec 201806046.594.19$251
Nov 2018010552.934.24$445
Oct 201804061.443.40$136
Sep 2018011059.543.11$342
Aug 2018011559.403.07$353
Jul 2018011665.142.93$340
Jun 201801060.183.08$31
May 201802765.382.90$78
Apr 2018023263.842.90$673
Mar 201803861.222.79$106
Feb 201807761.782.77$213
Jan 2018011162.874.01$445
Dec 201702457.272.92$70
Nov 2017019555.423.12$608
Oct 2017036249.292.98$1,080
Sep 2017011647.523.09$358
Aug 201701645.373.00$48
Jul 2017031143.873.09$960
Jun 2017012342.493.09$380
May 2017035745.373.26$1,165
Apr 2017061447.933.21$1,972
Mar 2017044646.772.98$1,331
Feb 2017012250.452.95$360
Jan 2017014149.413.42$482
Dec 2016018448.763.72$685
Nov 2016016342.492.64$431
Oct 201609546.193.09$294
Sep 2016010241.553.10$316
Aug 2016011441.442.92$333
Jul 2016010541.622.92$307
Jun 2016013645.352.69$365
May 2016011342.521.99$225
Apr 2016011036.561.99$219
Mar 2016013433.011.79$240
Feb 2016013526.472.06$279
Jan 2016013127.352.36$310
Dec 2015018532.362.00$370
Nov 2015018138.792.17$392
Oct 201507543.552.43$182
Sep 2015025942.992.76$714
Aug 2015033740.162.87$968
Jul 2015060248.152.95$1,773
Jun 2015052556.152.88$1,514
May 2015074155.212.96$2,190
Apr 2015074849.822.71$2,025
Mar 2015054742.892.93$1,605
Feb 2015063544.662.98$1,890
Jan 201501,04043.433.10$3,225
Dec 20141701,13854.693.59$13,384
Nov 201401,11970.464.25$4,758
Oct 201401,14778.303.90$4,474
Sep 201401,11586.164.05$4,511
Aug 201401,20189.394.04$4,846
Jul 2014090296.564.18$3,770
Jun 201401,22598.164.74$5,803
May 201401,35094.734.73$6,381
Apr 201401,10995.944.81$5,333
Mar 201401,37795.895.06$6,963
Feb 201401,23897.406.19$7,666
Jan 201401,17590.404.86$5,711
Dec 201308991.824.35$388
Nov 20131621,17788.853.74$18,794
Oct 201301,28897.423.78$4,868
Sep 201301,307104.113.72$4,859
Aug 201301,151104.253.52$4,055
Jul 201300102.523.72$0
Jun 2013078394.403.93$3,080
May 201301,23494.834.15$5,120
Apr 201301,21693.964.28$5,208
Mar 201301,27293.623.91$4,977
Feb 201301,16691.233.42$3,988
Jan 201301,30291.603.42$4,453
Dec 201201,40486.773.42$4,802
Nov 201201,29186.953.62$4,680
Oct 201201,30889.383.40$4,447
Sep 201201,27594.672.92$3,721
Aug 201201,32892.662.91$3,862
Jul 201201,33785.133.02$4,039
Jun 201201,23679.822.52$3,114
May 201201,27191.612.49$3,163
Apr 201201,184101.652.00$2,364
Mar 201201,298105.052.22$2,884
Feb 201201,213101.102.57$3,118
Jan 201201,23598.092.73$3,377
Dec 201101,33496.873.24$4,322
Nov 20111621,31895.723.31$19,871
Oct 201101,40284.983.65$5,115
Sep 201101,36483.623.99$5,437
Aug 201101,43883.404.15$5,967
Jul 201101,45494.144.52$6,568
Jun 201101,42592.904.64$6,612
May 201101,49498.134.40$6,581
Apr 201101,241105.964.33$5,378
Mar 201101,52196.364.06$6,171
Feb 201101,16085.644.18$4,849
Jan 201101,48186.504.59$6,796
Dec 201001,50885.734.35$6,556
Nov 201001,50680.843.80$5,716
Oct 201001,56978.103.51$5,505
Sep 201001,44272.633.98$5,738
Aug 201001,44273.684.42$6,373
Jul 201001,71172.554.74$8,104
Jun 201001,49870.364.91$7,356
May 20101421,96771.124.24$18,430
Apr 201001,43781.694.12$5,924
Mar 201001,82378.394.39$8,001
Feb 201001,27673.585.44$6,944
Jan 201001,43074.365.96$8,529
Dec 200901,53871.445.48$8,434
Nov 200901,51274.593.75$5,672
Oct 200901,59572.544.11$6,556
Sep 200901,06765.543.06$3,270
Aug 20090067.423.22$0
Jul 20090061.133.46$0
Jun 20090066.163.90$0
May 20090054.743.93$0
Apr 20090046.773.59$0
Mar 20090042.144.06$0
Feb 20090032.814.63$0
Jan 20090035.865.37$0
Dec 20080037.105.98$0
Nov 200811055.496.86$610
Oct 20080075.246.92$0
Sep 200800101.767.88$0
Aug 200800114.228.48$0
Jul 200800131.0811.39$0
Jun 200800131.3313.03$0
May 200800123.1711.57$0
Apr 200800110.3110.45$0
Mar 200800101.909.66$0
Feb 20080092.538.77$0
Jan 20080090.388.21$0
Dec 20070088.337.30$0
Nov 200733091.677.29$3,025
Oct 20070082.856.92$0
Sep 20070075.846.24$0
Aug 20070069.066.39$0
Jul 20070070.906.39$0
Jun 20070062.007.55$0
May 20070058.747.85$0
Apr 20070059.617.81$0
Mar 200744056.927.30$2,504
Feb 20070055.108.22$0
Jan 20070050.306.73$0
Dec 20060056.656.92$0
Nov 20060054.207.62$0
Oct 20060054.906.01$0
Sep 20060060.085.04$0
Aug 200605268.717.34$382
Jul 200608269.376.34$520
Jun 2006011466.286.38$728
May 2006011166.016.42$713
Apr 200605364.397.36$390
Mar 200603556.707.08$248
Feb 200602057.597.75$155
Jan 200602260.598.93$197
Dec 200501954.9413.42$255
Nov 200502254.6910.59$233
Oct 200502758.3413.80$372
Sep 200503161.4512.08$374
Aug 200503961.519.80$382
Jul 200507055.697.84$549
Jun 200507552.337.38$554
May 2005013345.226.65$885
Apr 200505949.207.36$434
Mar 200508650.377.15$615
Feb 200509045.226.31$568
Jan 2005015643.166.32$986
Dec 2004012339.866.75$830
Nov 200403345.286.33$209
Oct 200404149.706.52$267
Sep 200407643.245.28$402
Aug 200409442.375.55$522
Jul 200409238.286.08$560
Jun 200408936.106.43$573
May 200409837.486.49$636
Apr 200409534.475.86$557
Mar 200409934.365.53$547
Feb 200409332.455.51$512
Jan 2004111232.036.30$738
Dec 2003011430.266.30$718
Nov 2003012528.804.60$574
Oct 2003015128.174.76$719
Sep 20033015726.314.75$1,535
Aug 2003014829.765.13$759
Jul 2003018529.415.17$957
Jun 2003019128.565.98$1,143
May 2003023026.595.97$1,374
Apr 2003034426.675.41$1,860
Mar 2003035131.146.10$2,140
Feb 2003037633.487.93$2,980
Jan 2003013330.315.58$742
Dec 2002013226.914.85$641
Nov 2002044024.664.14$1,820
Oct 2002025026.464.23$1,057
Sep 2002020427.443.64$742
Aug 2002050825.963.16$1,607
Jul 2002029924.583.06$915
Jun 2002011023.733.34$367
May 20025912424.663.58$1,899
Apr 2002013123.653.51$460
Mar 2002010922.003.10$338
Feb 2002012218.222.38$290
Jan 2002014317.172.38$340
Dec 2001014616.932.36$345
Nov 2001014518.072.41$349
Oct 2001015019.782.53$379
Sep 2001014524.262.25$326
Aug 20018315324.873.05$2,531
Jul 2001015723.933.20$502
Jun 2001014824.563.82$566
May 2001016925.524.31$728
Apr 2001017424.685.34$928
Mar 2001019724.545.38$1,059
Feb 2001019927.755.77$1,148
Jan 2001022527.478.40$1,890
Dec 2000023926.889.12$2,180
Nov 2000023832.215.66$1,347
Oct 2000028831.235.15$1,482
Sep 2000024631.875.19$1,276
Aug 2000029329.644.54$1,330
Jul 2000030328.534.09$1,239
Jun 2000037529.304.40$1,649
May 2000093127.263.68$3,426
Apr 2000043324.513.12$1,349
Mar 2000076828.422.86$2,196
Feb 2000060727.622.73$1,655
Jan 2000069725.272.48$1,729
Dec 199901,29724.282.42$3,144
Nov 199901,29723.192.43$3,157
Oct 199901,34520.982.80$3,771
Sep 199901,36121.752.62$3,564
Aug 1999921,58119.262.88$6,318
Jul 199901,47817.892.37$3,506
Jun 199901,47615.942.36$3,486
May 199901,33115.792.32$3,089
Apr 199901,51815.102.21$3,352
Mar 199901,89312.471.84$3,480
Feb 199901,6769.981.82$3,047
Jan 199901,29110.381.90$2,453
Dec 199802,0819.201.77$3,690
Nov 19981762,30810.892.19$6,961
Oct 199802,72612.421.97$5,368
Sep 199803,20912.592.08$6,683
Aug 199803,23311.301.91$6,166
Jul 199803,24711.742.24$7,264
Jun 199803,04211.242.24$6,806
May 199801,49012.622.21$3,287
Apr 199801,55513.042.51$3,896
Mar 199801,65912.802.31$3,831
Feb 199801,63113.952.30$3,750
Jan 19981114,21014.702.15$10,703
Dec 199704,21016.322.41$10,151
Nov 199702,33018.193.09$7,196
Oct 199702,44119.253.15$7,689
Sep 199702,70117.742.95$7,981
Aug 199703,67017.862.55$9,376
Jul 199703,54917.582.25$7,974
Jun 199703,93017.242.26$8,871
May 19972284,12918.972.31$13,857
Apr 199703,99417.882.08$8,319
Mar 199702,49818.951.94$4,844
Feb 199702,28720.492.21$5,045
Jan 199702,19723.483.54$7,777
Dec 199602,83923.32$0
Nov 199602,44421.97$0
Oct 19964032,51123.31$9,394
Sep 199602,86422.22$0
Aug 199602,79420.26$0
Jul 199603,00219.55$0
Jun 199602,19618.73$0
May 199604,85719.43$0
Apr 199604,10421.51$0
Mar 199603,58919.38$0
Feb 199603,98316.98$0
Jan 19964424,20317.07$7,545
Dec 199504,20317.19$0
Nov 199504,41416.00$0
Oct 19953955,62915.43$6,095
Sep 199504,46016.18$0
Aug 199503,90115.92$0
Jul 199503,83015.24$0
Jun 199504,97116.41$0
May 199505,04017.56$0
Apr 199504,51517.73$0
Mar 199504,56316.44$0
Feb 199505,01116.58$0
Jan 199505,34815.92$0
Dec 199405,30315.03$0
Nov 199405,31415.90$0
Oct 199405,21215.58$0
Sep 199405,85515.29$0
Aug 19941115,88916.13$1,790
Jul 199406,19017.56$0
Jun 199405,29817.09$0
May 199404,22815.88$0
Apr 19940114.14$0
Mar 19941084,45812.46$1,346
Feb 199404,82512.50$0
Jan 199405,65112.66$0
Dec 199302,54812.33$0

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.

Aug 2025 — as filed, then multipliedworked
Condensate            56 bbl  × $ 63.93 =     $3,580
Gas                    0 Mcf  × $  3.01 =         $0

────────────────────────────────────────────────────
Month total                                   $3,580

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. 08/G/147951 is the state's own key, not one this site invented.