MARY ANN

Operated by DIAMONDBACK E&P LLC (P-5 217012) in the RK (DEVONIAN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 23870District 08Field 74041100Hydrogen sulphide fieldOilCasinghead gasSaveExport
Value, all time
$63.6 M
Jan 1993 – Jul 2022
Value, last 12 filed months
$0
at the published price for each month
Months reported
355
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 52 leases and 86 wells, and the rule below applies to all of them.

Discovered
1975-05-17
as the register files it
Field class
Oil
the register's own label
Between wells
600 ft
minimum
From a lease line
300 ft
minimum

A drilling unit in this field needs at least 40 acres.

The register flags this field for hydrogen sulphide. That is a poisonous gas that occurs naturally in some formations. The flag is a property of the field as the Commission records it. It is not a measurement taken at this lease, and it is not a statement that gas is escaping anywhere.

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
OilDisposition1,453,663 bbl$63,627,987
Casinghead gasProduction222 Mcf$593
Total$63,628,580

23 Mcf of this lease's gas, across 23 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 (3)

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 32.3483, -101.9652. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.2 miles.

32.34834, -101.96522 · 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%
3 of 3 wells
With a plug date
100.0%
3 of 3 wells
Median depth
11,885 ft
3 wells filed one
Completion to plug
8.0 years
median over 3 wells

What the state filed about each well

On the RRC proration schedule
3100.0%
A plug date is filed
3100.0%
BothOn the schedule and plugged. Neither fact cancels the other.
3100.0%
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

Between 11,820 and 12,132 ft, median 11,885 ft, over the 3 wells that filed a depth.

Completions filed
Nov 1981 – Dec 2017
3 of 3 wells
Plug dates filed
Aug 2021 – Mar 2025
3 of 3 wells

Last completion to plug: a median of 8.0 years across the 3 wells that filed both dates, with the middle half between 6.3 years and 23.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

3 wells

42-31731450112,132 ftDec 2017Jun 2022Yes
42-31735027311,885 ftMar 2017Mar 2025Yes
42-31732422211,820 ftNov 1981Aug 2021Yes

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 (355)

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

355 months

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 20190055.302.75$0
Oct 20190053.472.42$0
Sep 20190055.052.66$0
Aug 20190053.112.30$0
Jul 20190056.272.46$0
Jun 20190052.782.49$0
May 20190058.482.74$0
Apr 20190062.632.75$0
Mar 201927056.803.06$1,534
Feb 201919050.852.79$966
Jan 2019148046.033.23$6,812
Dec 201874046.594.19$3,448
Nov 201833052.934.24$1,747
Oct 2018115061.443.40$7,066
Sep 2018118059.543.11$7,026
Aug 2018285059.403.07$16,929
Jul 20180065.142.93$0
Jun 20180060.183.08$0
May 2018235065.382.90$15,364
Apr 2018429063.842.90$27,387
Mar 2018461061.222.79$28,222
Feb 2018683061.782.77$42,196
Jan 2018203062.874.01$12,763
Dec 2017885057.272.92$50,684
Nov 2017158055.423.12$8,756
Oct 2017539049.292.98$26,567
Sep 2017730047.523.09$34,690
Aug 20171,015045.373.00$46,051
Jul 2017762043.873.09$33,429
Jun 2017906042.493.09$38,496
May 2017485045.373.26$22,004
Apr 2017322047.933.21$15,433
Mar 2017301046.772.98$14,078
Feb 2017494050.452.95$24,922
Jan 20172,777049.413.42$137,212
Dec 20162,2866248.763.72$111,696
Nov 20161,69913742.492.64$72,553
Oct 20163,001046.193.09$138,616
Sep 20163,369041.553.10$139,982
Aug 20163,147041.442.92$130,412
Jul 20163,273041.622.92$136,222
Jun 20163,287045.352.69$149,065
May 20163,300042.521.99$140,316
Apr 20163,396036.561.99$124,158
Mar 20163,568033.011.79$117,780
Feb 20163,288026.472.06$87,033
Jan 20163,404027.352.36$93,099
Dec 20153,068032.362.00$99,280
Nov 20153,106038.792.17$120,482
Oct 20153,478043.552.43$151,467
Sep 20153,725042.992.76$160,138
Aug 20152,778040.162.87$111,564
Jul 20153,677048.152.95$177,048
Jun 20153,733056.152.88$209,608
May 20153,489055.212.96$192,628
Apr 20153,513049.822.71$175,018
Mar 20153,882042.892.93$166,499
Feb 20152,934044.662.98$131,032
Jan 20151,360043.433.10$59,065
Dec 20143,748054.693.59$204,978
Nov 20143,445070.464.25$242,735
Oct 20144,201078.303.90$328,938
Sep 20144,269086.164.05$367,817
Aug 20144,200089.394.04$375,438
Jul 20143,767096.564.18$363,742
Jun 20143,587098.164.74$352,100
May 20143,690094.734.73$349,554
Apr 20142,787095.944.81$267,385
Mar 20142,813095.895.06$269,739
Feb 20142,570097.406.19$250,318
Jan 20144,159090.404.86$375,974
Dec 20133,907091.824.35$358,741
Nov 20133,603088.853.74$320,127
Oct 20134,435097.423.78$432,058
Sep 20134,2320104.113.72$440,594
Aug 20134,2370104.253.52$441,707
Jul 20134,3950102.523.72$450,575
Jun 20134,056094.403.93$382,886
May 20134,060094.834.15$385,010
Apr 20133,899093.964.28$366,350
Mar 20134,718093.623.91$441,699
Feb 20134,269091.233.42$389,461
Jan 20135,029091.603.42$460,656
Dec 20124,440086.773.42$385,259
Nov 20123,648086.953.62$317,194
Oct 20125,246089.383.40$468,887
Sep 20124,085094.672.92$386,727
Aug 20124,611092.662.91$427,255
Jul 20123,920085.133.02$333,710
Jun 20123,738079.822.52$298,367
May 20125,095091.612.49$466,753
Apr 20125,0480101.652.00$513,129
Mar 20124,6230105.052.22$485,646
Feb 20123,8230101.102.57$386,505
Jan 20125,442098.092.73$533,806
Dec 20114,993096.873.24$483,672
Nov 20115,205095.723.31$498,223
Oct 20115,848084.983.65$496,963
Sep 20115,379083.623.99$449,792
Aug 20113,717083.404.15$309,998
Jul 20115,447094.144.52$512,781
Jun 20115,495092.904.64$510,486
May 20115,909098.134.40$579,850
Apr 20115,9940105.964.33$635,124
Mar 20116,075096.364.06$585,387
Feb 20115,873085.644.18$502,964
Jan 20116,558086.504.59$567,267
Dec 20107,258085.734.35$622,228
Nov 20106,635080.843.80$536,373
Oct 20106,469078.103.51$505,229
Sep 20106,780072.633.98$492,431
Aug 20107,220073.684.42$531,970
Jul 20106,976072.554.74$506,109
Jun 20106,025070.364.91$423,919
May 20107,752071.124.24$551,322
Apr 20108,195081.694.12$669,450
Mar 20109,073078.394.39$711,232
Feb 20108,939073.585.44$657,732
Jan 20109,842074.365.96$731,851
Dec 20097,038071.445.48$502,795
Nov 20096,665074.593.75$497,142
Oct 20097,329072.544.11$531,646
Sep 20096,561065.543.06$430,008
Aug 20096,289067.423.22$424,004
Jul 20094,809061.133.46$293,974
Jun 20094,146066.163.90$274,299
May 20094,151054.743.93$227,226
Apr 20094,217046.773.59$197,229
Mar 20094,463042.144.06$188,071
Feb 20093,737032.814.63$122,611
Jan 20094,236035.865.37$151,903
Dec 20083,848037.105.98$142,761
Nov 20084,006055.496.86$222,293
Oct 20084,080075.246.92$306,979
Sep 20084,0040101.767.88$407,447
Aug 20083,9710114.228.48$453,568
Jul 20084,1410131.0811.39$542,802
Jun 20084,6510131.3313.03$610,816
May 20084,2010123.1711.57$517,437
Apr 20084,2740110.3110.45$471,465
Mar 20084,5660101.909.66$465,275
Feb 20084,241092.538.77$392,420
Jan 20084,646090.388.21$419,905
Dec 20075,383088.337.30$475,480
Nov 20075,847091.677.29$535,994
Oct 20074,377082.856.92$362,634
Sep 20073,994075.846.24$302,905
Aug 20072,603069.066.39$179,763
Jul 20072,734070.906.39$193,841
Jun 20072,680062.007.55$166,160
May 20073,019058.747.85$177,336
Apr 20072,673059.617.81$159,338
Mar 20073,557056.927.30$202,464
Feb 20072,819055.108.22$155,327
Jan 20072,816050.306.73$141,645
Dec 20062,783056.656.92$157,657
Nov 20061,926054.207.62$104,389
Oct 20063,105054.906.01$170,465
Sep 20063,354060.085.04$201,508
Aug 20063,512068.717.34$241,310
Jul 20062,892069.376.34$200,618
Jun 20063,449066.286.38$228,600
May 20063,423066.016.42$225,952
Apr 20063,299064.397.36$212,423
Mar 20063,462056.707.08$196,295
Feb 20063,152057.597.75$181,524
Jan 20063,423060.598.93$207,400
Dec 20052,901054.9413.42$159,381
Nov 20053,491054.6910.59$190,923
Oct 20053,711058.3413.80$216,500
Sep 20053,571061.4512.08$219,438
Aug 20053,516061.519.80$216,269
Jul 20053,792055.697.84$211,176
Jun 20053,270052.337.38$171,119
May 20053,347045.226.65$151,351
Apr 20053,662049.207.36$180,170
Mar 20054,077050.377.15$205,358
Feb 20053,345045.226.31$151,261
Jan 20053,553043.166.32$153,347
Dec 20043,951039.866.75$157,487
Nov 20043,764045.286.33$170,434
Oct 20043,801049.706.52$188,910
Sep 20043,701043.245.28$160,031
Aug 20043,726042.375.55$157,871
Jul 20043,835038.286.08$146,804
Jun 20043,734036.106.43$134,797
May 20043,952037.486.49$148,121
Apr 20043,734034.475.86$128,711
Mar 20043,648034.365.53$125,345
Feb 20043,223032.455.51$104,586
Jan 20043,688032.036.30$118,127
Dec 20033,940030.266.30$119,224
Nov 20033,934028.804.60$113,299
Oct 20034,014028.174.76$113,074
Sep 20033,122026.314.75$82,140
Aug 20033,968029.765.13$118,088
Jul 20033,536029.415.17$103,994
Jun 20033,824028.565.98$109,213
May 20033,983026.595.97$105,908
Apr 20033,763026.675.41$100,359
Mar 20034,125031.146.10$128,453
Feb 20033,228033.487.93$108,073
Jan 20034,274030.315.58$129,545
Dec 20023,157026.914.85$84,955
Nov 20024,636024.664.14$114,324
Oct 20024,741026.464.23$125,447
Sep 20024,028027.443.64$110,528
Aug 20024,267025.963.16$110,771
Jul 20024,094024.583.06$100,631
Jun 20024,201023.733.34$99,690
May 20024,471024.663.58$110,255
Apr 20023,926023.653.51$92,850
Mar 20023,916022.003.10$86,152
Feb 20024,214018.222.38$76,779
Jan 20024,691017.172.38$80,544
Dec 20014,925016.932.36$83,380
Nov 20014,316018.072.41$77,990
Oct 20014,822019.782.53$95,379
Sep 20013,796024.262.25$92,091
Aug 20014,480024.873.05$111,418
Jul 20013,935023.933.20$94,165
Jun 20013,993024.563.82$98,068
May 20014,511025.524.31$115,121
Apr 20013,589024.685.34$88,577
Mar 20014,737024.545.38$116,246
Feb 20014,271027.755.77$118,520
Jan 20014,784027.478.40$131,416
Dec 20004,966026.889.12$133,486
Nov 20004,950032.215.66$159,440
Oct 20004,922031.235.15$153,714
Sep 20005,010031.875.19$159,669
Aug 20004,951029.644.54$146,748
Jul 20005,443028.534.09$155,289
Jun 20004,802029.304.40$140,699
May 20005,714027.263.68$155,764
Apr 20005,579024.513.12$136,741
Mar 20005,897028.422.86$167,593
Feb 20005,530027.622.73$152,739
Jan 20006,259025.272.48$158,165
Dec 19995,904024.282.42$143,349
Nov 19995,807023.192.43$134,664
Oct 19996,031020.982.80$126,530
Sep 19995,779021.752.62$125,693
Aug 19995,250019.262.88$101,115
Jul 19995,574017.892.37$99,719
Jun 19995,695015.942.36$90,778
May 19996,145015.792.32$97,030
Apr 19996,286015.102.21$94,919
Mar 19995,285012.471.84$65,904
Feb 19995,81109.981.82$57,994
Jan 19996,313010.381.90$65,529
Dec 19985,90809.201.77$54,354
Nov 19985,714010.892.19$62,225
Oct 19986,852012.421.97$85,102
Sep 19986,367012.592.08$80,161
Aug 19986,733011.301.91$76,083
Jul 19986,568011.742.24$77,108
Jun 19986,622011.242.24$74,431
May 19987,023012.622.21$88,630
Apr 19986,393013.042.51$83,365
Mar 19986,608012.802.31$84,582
Feb 19986,749013.952.30$94,149
Jan 19987,584014.702.15$111,485
Dec 19977,700016.322.41$125,664
Nov 19977,266018.193.09$132,169
Oct 19977,808019.253.15$150,304
Sep 19977,250017.742.95$128,615
Aug 19977,611017.862.55$135,932
Jul 19978,255017.582.25$145,123
Jun 19976,332017.242.26$109,164
May 19977,900018.972.31$149,863
Apr 19978,858017.882.08$158,381
Mar 19979,656018.951.94$182,981
Feb 19977,568020.492.21$155,068
Jan 19976,664023.483.54$156,471
Dec 19966,552023.32$152,793
Nov 19966,462021.97$141,970
Oct 19965,865023.31$136,713
Sep 19966,571022.22$146,008
Aug 19967,072020.26$143,279
Jul 19965,974019.55$116,792
Jun 19966,831018.73$127,945
May 19967,296019.43$141,761
Apr 19967,139021.51$153,560
Mar 19967,355019.38$142,540
Feb 19967,015016.98$119,115
Jan 19967,548017.07$128,844
Dec 19957,770017.19$133,566
Nov 19955,644016.00$90,304
Oct 19956,024015.43$92,950
Sep 19956,419016.18$103,859
Aug 19956,414015.92$102,111
Jul 19956,367015.24$97,033
Jun 19956,755016.41$110,850
May 19956,859017.56$120,444
Apr 19957,095017.73$125,794
Mar 19956,466016.44$106,301
Feb 19956,054016.58$100,375
Jan 19956,833015.92$108,781
Dec 19947,283015.03$109,463
Nov 19946,731115.90$107,023
Oct 19947,526115.58$117,255
Sep 19947,701115.29$117,748
Aug 19946,432116.13$103,748
Jul 19946,714117.56$117,898
Jun 19946,292117.09$107,530
May 19947,090115.88$112,589
Apr 19946,735114.14$95,233
Mar 19946,567112.46$81,825
Feb 19946,143112.50$76,788
Jan 19947,186112.66$90,975
Dec 19936,628112.33$81,723
Nov 19936,880114.49$99,691
Oct 19937,255115.85$114,992
Sep 19937,297115.03$109,674
Aug 19937,600115.66$119,016
Jul 19937,597115.46$117,450
Jun 19937,429116.79$124,733
May 19937,665117.68$135,517
Apr 19936,923118.05$124,960
Mar 19936,856118.14$124,368
Feb 19934,135117.90$74,017
Jan 19935,552116.93$93,995

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.

Mar 2019 — as filed, then multipliedworked
Oil                   27 bbl  × $ 56.80 =     $1,534
Casinghead gas         0 Mcf  × $  3.06 =         $0

────────────────────────────────────────────────────
Month total                                   $1,534

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/O/23870 is the state's own key, not one this site invented.