MAYFIELD, R. P. "B"

Operated by COASTAL PLAINS ENERGY, INC. (P-5 161671) in the ACKERLY (DEAN SAND) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 18198District 8AField 00448200OilCasinghead gasSaveExport
Value, all time
$2.5 M
Jan 1993 – May 2026
Value, last 12 filed months
$138 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 350 leases and 843 wells, and the rule below applies to all of them.

Discovered
1954-06-29
as the register files it
Field class
Oil and gas
the register's own label
Between wells
900 ft
minimum
From a lease line
550 ft
minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 2017-01-24.

The Commission's schedule remark for this field reads: RULES.

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
OilDisposition40,473 bbl$2,183,409
Casinghead gasProduction93,437 Mcf$327,047
Total$2,510,455

16,270 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.

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 2026144358106.413.05$16,413
Apr 202614031298.932.87$14,746
Mar 202617520689.753.15$16,355
Feb 202610326063.503.75$7,516
Jan 202612338659.138.00$10,360
Dec 202516243156.664.41$11,081
Nov 202516242358.593.93$11,152
Oct 202518424959.383.30$11,749
Sep 202512037162.743.08$8,670
Aug 202517838463.933.01$12,537
Jul 20251003266.743.32$6,780
Jun 202514531566.483.13$10,625
May 202518627860.553.23$12,161
Apr 20251225462.363.54$7,799
Mar 202512529867.704.27$9,734
Feb 202516937670.884.34$13,611
Jan 202516325974.324.28$13,222
Dec 202420532168.993.12$15,145
Nov 202414436469.052.20$10,743
Oct 202420735171.372.28$15,574
Sep 202416032369.612.36$11,901
Aug 202418430075.632.06$14,535
Jul 202418126479.932.15$15,034
Jun 202419439378.082.63$16,183
May 202420941078.812.20$17,373
Apr 2024194084.451.66$16,383
Mar 202421240580.301.55$17,649
Feb 202419547776.091.78$15,688
Jan 202420214373.023.30$15,222
Dec 202321418771.262.61$15,738
Nov 202317839177.892.81$14,962
Oct 202323450285.443.09$21,543
Sep 202321056389.042.74$20,238
Aug 202321852680.522.67$18,959
Jul 202324854274.852.64$19,995
Jun 202323449768.962.26$17,259
May 202323652570.622.23$17,836
Apr 202327246478.122.24$22,287
Mar 202328537672.852.39$21,662
Feb 202331032175.112.47$24,076
Jan 202328322776.533.39$22,427
Dec 202231920976.415.73$25,572
Nov 202227730885.005.65$25,284
Oct 202236031587.185.86$33,232
Sep 202234521284.888.16$31,014
Aug 202242818694.529.13$42,152
Jul 2022340150101.587.54$35,669
Jun 20225715115.097.98$6,680
May 202209109.378.43$76
Apr 202202104.226.84$14
Mar 202200108.885.08$0
Feb 202202391.054.86$112
Jan 20226210781.844.54$5,560
Dec 20217614971.323.90$6,001
Nov 20219515977.435.24$8,189
Oct 20219316179.795.71$8,340
Sep 20217713169.865.35$6,080
Aug 20219513666.024.22$6,846
Jul 20219314470.783.98$7,156
Jun 20217713069.493.38$5,790
May 202113613463.483.02$9,038
Apr 20213813460.362.76$2,663
Mar 202113614161.302.72$8,720
Feb 20213811557.805.55$2,834
Jan 2021774650.412.81$4,011
Dec 2020776144.642.68$3,600
Nov 20207812838.772.71$3,371
Oct 202011414036.972.48$4,562
Sep 20205814437.091.99$2,438
Aug 20208015539.982.39$3,568
Jul 202031715638.371.83$12,448
Jun 20206115234.901.69$2,386
May 2020015816.921.81$287
Apr 2020015814.751.80$285
Mar 20204315630.341.86$1,594
Feb 20207713249.881.98$4,102
Jan 202010213857.252.09$6,129
Dec 20198213359.012.30$5,145
Nov 2019827655.302.75$4,744
Oct 20195910853.472.42$3,416
Sep 2019854355.052.66$4,794
Aug 2019994053.112.30$5,350
Jul 201910412256.272.46$6,152
Jun 20196110752.782.49$3,486
May 201910011458.482.74$6,160
Apr 2019805262.632.75$5,153
Mar 2019834456.803.06$4,849
Feb 20195914850.852.79$3,413
Jan 201910214846.033.23$5,173
Dec 20188311146.594.19$4,332
Nov 2018833352.934.24$4,533
Oct 20188316961.443.40$5,674
Sep 20188913659.543.11$5,722
Aug 20188312859.403.07$5,323
Jul 201810114065.142.93$6,990
Jun 2018798060.183.08$5,000
May 2018828765.382.90$5,614
Apr 20188111963.842.90$5,516
Mar 201810216361.222.79$6,699
Feb 20187614061.782.77$5,083
Jan 20188115462.874.01$5,710
Dec 20178215257.272.92$5,140
Nov 20177915555.423.12$4,862
Oct 201710017649.292.98$5,454
Sep 20179716747.523.09$5,125
Aug 20179817645.373.00$4,975
Jul 20178218843.873.09$4,178
Jun 20177816442.493.09$3,821
May 20179612145.373.26$4,750
Apr 201761447.933.21$2,937
Mar 20177713846.772.98$4,013
Feb 20176112050.452.95$3,432
Jan 20171018949.413.42$5,295
Dec 2016792848.763.72$3,956
Nov 201681442.492.64$3,452
Oct 2016968746.193.09$4,703
Sep 2016588441.553.10$2,670
Aug 20167811941.442.92$3,580
Jul 20167910541.622.92$3,595
Jun 20166114845.352.69$3,164
May 20167616242.521.99$3,554
Apr 20165615936.561.99$2,364
Mar 20169917033.011.79$3,573
Feb 20168114926.472.06$2,452
Jan 201611816027.352.36$3,606
Dec 20154117532.362.00$1,677
Nov 201512117738.792.17$5,077
Oct 20156017543.552.43$3,038
Sep 201510118142.992.76$4,841
Aug 20152020040.162.87$1,378
Jul 20159418748.152.95$5,077
Jun 20154118256.152.88$2,827
May 201510018655.212.96$6,071
Apr 201510318649.822.71$5,635
Mar 20158422142.892.93$4,251
Feb 20156217244.662.98$3,281
Jan 20158418243.433.10$4,212
Dec 20148319054.693.59$5,222
Nov 20148320870.464.25$6,733
Oct 20148222978.303.90$7,314
Sep 20148314286.164.05$7,726
Aug 20143917889.394.04$4,204
Jul 201412124596.564.18$12,708
Jun 20148222298.164.74$9,101
May 20146118894.734.73$6,667
Apr 2014629795.944.81$6,415
Mar 201410414295.895.06$10,691
Feb 20148115297.406.19$8,831
Jan 201410014290.404.86$9,730
Dec 20138218391.824.35$8,326
Nov 201310313588.853.74$9,656
Oct 20138318197.423.78$8,770
Sep 201382108104.113.72$8,939
Aug 201397104104.253.52$10,479
Jul 201358175102.523.72$6,597
Jun 201310214594.403.93$10,199
May 20135914494.834.15$6,192
Apr 20137914993.964.28$8,061
Mar 20134114493.623.91$4,402
Feb 201310015091.233.42$9,636
Jan 20138217191.603.42$8,096
Dec 20126214686.773.42$5,879
Nov 2012831186.953.62$7,257
Oct 2012571289.383.40$5,135
Sep 20128114894.672.92$8,100
Aug 201210218592.662.91$9,989
Jul 20127919585.133.02$7,314
Jun 20126220479.822.52$5,463
May 201210422691.612.49$10,090
Apr 2012141199101.652.00$14,730
Mar 201242183105.052.22$4,819
Feb 201262175101.102.57$6,718
Jan 20128319098.092.73$8,661
Dec 201111620596.873.24$11,901
Nov 20119415895.723.31$9,521
Oct 20114714484.983.65$4,519
Sep 20119116483.623.99$8,263
Aug 20113819383.404.15$3,970
Jul 20119219094.144.52$9,519
Jun 20114718392.904.64$5,215
May 201111722598.134.40$12,472
Apr 201189202105.964.33$10,306
Mar 20119223496.364.06$9,815
Feb 201111719785.644.18$10,843
Jan 20119421486.504.59$9,113
Dec 20109421485.734.35$8,989
Nov 20109420980.843.80$8,392
Oct 201011623178.103.51$9,870
Sep 20109326672.633.98$7,813
Aug 201016027873.684.42$13,017
Jul 20109127172.554.74$7,886
Jun 20109325270.364.91$7,781
May 20109323971.124.24$7,626
Apr 20109524881.694.12$8,783
Mar 201011724878.394.39$10,260
Feb 20106921273.585.44$6,231
Jan 20109324774.365.96$8,389
Dec 200913925071.445.48$11,301
Nov 20096918774.593.75$5,848
Oct 2009163972.544.11$11,861
Sep 20094012065.543.06$2,989
Aug 20099117767.423.22$6,705
Jul 20099110361.133.46$5,920
Jun 20099119266.163.90$6,768
May 200911616654.743.93$7,002
Apr 20096921746.773.59$4,006
Mar 20099212142.144.06$4,368
Feb 20099222532.814.63$4,061
Jan 2009488235.865.37$2,162
Dec 20087115837.105.98$3,578
Nov 20087116755.496.86$5,085
Oct 200811616675.246.92$9,877
Sep 2008116141101.767.88$12,915
Aug 200895194114.228.48$12,497
Jul 200870215131.0811.39$11,624
Jun 200894236131.3313.03$15,421
May 200846224123.1711.57$8,258
Apr 200892225110.3110.45$12,501
Mar 2008139223101.909.66$16,319
Feb 20084721192.538.77$6,200
Jan 20089219890.388.21$9,940
Dec 200711726088.337.30$12,233
Nov 20079327191.677.29$10,501
Oct 200711531182.856.92$11,680
Sep 200711430775.846.24$10,563
Aug 20079329569.066.39$8,307
Jul 200713824770.906.39$11,362
Jun 200711327062.007.55$9,044
May 20077026258.747.85$6,168
Apr 20076723859.617.81$5,852
Mar 200711528756.927.30$8,641
Feb 20079424955.108.22$7,225
Jan 20074822650.306.73$3,935
Dec 20066225356.656.92$5,263
Nov 20067623454.207.62$5,902
Oct 20064018754.906.01$3,321
Sep 20067524760.085.04$5,750
Aug 20063828168.717.34$4,674
Jul 20065127469.376.34$5,276
Jun 20067725466.286.38$6,725
May 20065223866.016.42$4,962
Apr 20065023164.397.36$4,920
Mar 20065024656.707.08$4,577
Feb 20065223357.597.75$4,801
Jan 20067625560.598.93$6,883
Dec 20053825454.9413.42$5,495
Nov 20056622954.6910.59$6,034
Oct 20056326458.3413.80$7,318
Sep 20055126561.4512.08$6,335
Aug 20056227761.519.80$6,527
Jul 20057627655.697.84$6,397
Jun 20055127052.337.38$4,662
May 20058928045.226.65$5,887
Apr 20053626949.207.36$3,751
Mar 20058614050.377.15$5,334
Feb 20052610645.226.31$1,845
Jan 20056623743.166.32$4,347
Dec 20047824639.866.75$4,770
Nov 20046524045.286.33$4,463
Oct 20042624049.706.52$2,856
Sep 20046426343.245.28$4,157
Aug 20046427242.375.55$4,221
Jul 20046428438.286.08$4,178
Jun 20043920736.106.43$2,740
May 20046424437.486.49$3,983
Apr 20045225534.475.86$3,286
Mar 20046428534.365.53$3,775
Feb 20047727932.455.51$4,036
Jan 20046526032.036.30$3,720
Dec 20035327830.266.30$3,356
Nov 20035226528.804.60$2,715
Oct 20038830128.174.76$3,912
Sep 20035127226.314.75$2,634
Aug 20036430029.765.13$3,444
Jul 20035128929.415.17$2,994
Jun 20036228028.565.98$3,446
May 20035228926.595.97$3,109
Apr 20036428026.675.41$3,221
Mar 20037728231.146.10$4,117
Feb 20035024433.487.93$3,608
Jan 20037728630.315.58$3,930
Dec 20026627326.914.85$3,101
Nov 20028227224.664.14$3,147
Oct 20029828626.464.23$3,803
Sep 20028127927.443.64$3,237
Aug 20026528825.963.16$2,599
Jul 20028130424.583.06$2,922
Jun 20028029623.733.34$2,887
May 20028129624.663.58$3,058
Apr 20029728323.653.51$3,288
Mar 20024916022.003.10$1,574
Feb 20029516218.222.38$2,116
Jan 20028323617.172.38$1,986
Dec 20018223816.932.36$1,951
Nov 20018120718.072.41$1,962
Oct 20018125319.782.53$2,242
Sep 20016221924.262.25$1,997
Aug 20019621324.873.05$3,038
Jul 20016523323.933.20$2,300
Jun 20019725624.563.82$3,361
May 20019727525.524.31$3,660
Apr 20018227624.685.34$3,496
Mar 200111324824.545.38$4,106
Feb 20016522427.755.77$3,096
Jan 20018023227.478.40$4,146
Dec 20009824026.889.12$4,824
Nov 20009725532.215.66$4,567
Oct 20006523931.235.15$3,260
Sep 20006525531.875.19$3,394
Aug 20009628129.644.54$4,121
Jul 20006530828.534.09$3,114
Jun 20009630729.304.40$4,163
May 20009729227.263.68$3,719
Apr 20009627724.513.12$3,216
Mar 20008328028.422.86$3,160
Feb 20008130327.622.73$3,063
Jan 20006432325.272.48$2,418
Dec 199911432224.282.42$3,548
Nov 19999831523.192.43$3,039
Oct 19999733620.982.80$2,977
Sep 19998021521.752.62$2,303
Aug 19999631619.262.88$2,758
Jul 19996231817.892.37$1,864
Jun 19999731915.942.36$2,300
May 19996528515.792.32$1,688
Apr 19996626615.102.21$1,584
Mar 19999829712.471.84$1,768
Feb 1999812369.981.82$1,237
Jan 19998124810.381.90$1,312
Dec 1998982619.201.77$1,364
Nov 19986423910.892.19$1,219
Oct 19986726012.421.97$1,344
Sep 19989929012.592.08$1,850
Aug 19989429011.301.91$1,615
Jul 199811329511.742.24$1,987
Jun 19988130211.242.24$1,586
May 19989730612.622.21$1,899
Apr 19986528513.042.51$1,562
Mar 19983326412.802.31$1,032
Feb 19989721413.952.30$1,845
Jan 19987826314.702.15$1,713
Dec 19975726616.322.41$1,572
Nov 19977028518.193.09$2,153
Oct 19978631319.253.15$2,641
Sep 19978533917.742.95$2,510
Aug 19978535517.862.55$2,425
Jul 19978435817.582.25$2,281
Jun 19977133717.242.26$1,985
May 199710135418.972.31$2,733
Apr 19977331117.882.08$1,953
Mar 19978430618.951.94$2,185
Feb 19975629920.492.21$1,807
Jan 19979833823.483.54$3,497
Dec 19967332623.32$1,702
Nov 19967032021.97$1,538
Oct 19968536123.31$1,981
Sep 19968533922.22$1,889
Aug 19969738120.26$1,965
Jul 199611339219.55$2,209
Jun 19969836618.73$1,836
May 19969438219.43$1,826
Apr 19969735321.51$2,086
Mar 19969237019.38$1,783
Feb 199611735116.98$1,987
Jan 19969135117.07$1,553
Dec 199510738017.19$1,839
Nov 199511837916.00$1,888
Oct 19958236915.43$1,265
Sep 19959637716.18$1,553
Aug 199511439915.92$1,815
Jul 199510239915.24$1,554
Jun 199510139116.41$1,657
May 199511539317.56$2,019
Apr 19959637317.73$1,702
Mar 199510238216.44$1,677
Feb 199510434916.58$1,724
Jan 199512339215.92$1,958
Dec 199411740415.03$1,759
Nov 199412538715.90$1,988
Oct 199411041215.58$1,714
Sep 199413038915.29$1,988
Aug 199416042116.13$2,581
Jul 199413138317.56$2,300
Jun 199413237317.09$2,256
May 199414036015.88$2,223
Apr 199421835714.14$3,083
Mar 199427722112.46$3,451
Feb 19947317012.50$913
Jan 199419227512.66$2,431
Dec 199320621612.33$2,540
Nov 199318122014.49$2,623
Oct 199320521815.85$3,249
Sep 199325020815.03$3,758
Aug 199313743515.66$2,145
Jul 199315121415.46$2,334
Jun 199314124816.79$2,367
May 199318231417.68$3,218
Apr 199318528818.05$3,339
Mar 199316427518.14$2,975
Feb 199318926717.90$3,383
Jan 199318434016.93$3,115

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                  144 bbl  × $106.41 =    $15,323
Casinghead gas       358 Mcf  × $  3.05 =     $1,090

────────────────────────────────────────────────────
Month total                                  $16,413

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. 8A/O/18198 is the state's own key, not one this site invented.