WILLERSON UNIT

Name: WILLERSON UNIT lease production and value, Dec 1997 onwards
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

Operated by SAGE ENERGY COMPANY (P-5 743215) in the PEARSALL (AUSTIN CHALK) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 14199District 01Field 69981125OilCasinghead gasSave Export

Value, all time

$2.2 M

Dec 1997 – Aug 2010

Value, last 12 filed months

$73

at the published price for each month

Months reported

153

no gaps in the span

Streams

oil, casinghead gas

The PEARSALL (AUSTIN CHALK) field

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 1,992 leases and 3,388 wells, and the rule below applies to all of them.

Discovered

1936-12-28

as the register files it

Field class

Oil and gas

the register's own label

Between wells

0 ft

minimum

From a lease line

330 ft

minimum

A drilling unit in this field needs at least 80 acres. The field rule took effect on 2025-06-17.

The Commission's schedule remark for this field reads: “LEASE PLAT. PRORATION PLAT IS NOT REQUIRED.”

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.

Stream	Basis	Volume	Value
Oil	Disposition	108,629 bbl	$2,003,187
Casinghead gas	Production	61,116 Mcf	$149,410
Total			$2,152,596

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 28.5795, -99.6307. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

28.57951, -99.63074 · centre of the wells drawn, derived⌘ or Ctrl + scroll to zoom

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

10,805 ft

1 wells filed one

Completion to plug

12.6 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 10,805 ft.

Completions filed

Dec 1997

1 of 1 wells

Plug dates filed

Jul 2010

1 of 1 wells

Last completion to plug: a median of 12.6 years across the 1 well that filed both dates, with the middle half between 12.6 years and 12.6 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

1 well


42-12733138	1H	10,805 ft	Dec 1997	Jul 2010	Yes

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 (153)

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

153 months


Aug 2010	0	0	73.68	4.42	$0
Jul 2010	1	0	72.55	4.74	$73
Jun 2010	0	0	70.36	4.91	$0
May 2010	0	0	71.12	4.24	$0
Apr 2010	0	0	81.69	4.12	$0
Mar 2010	0	0	78.39	4.39	$0
Feb 2010	0	0	73.58	5.44	$0
Jan 2010	0	0	74.36	5.96	$0
Dec 2009	0	0	71.44	5.48	$0
Nov 2009	0	0	74.59	3.75	$0
Oct 2009	0	0	72.54	4.11	$0
Sep 2009	0	0	65.54	3.06	$0
Aug 2009	0	0	67.42	3.22	$0
Jul 2009	0	0	61.13	3.46	$0
Jun 2009	0	0	66.16	3.90	$0
May 2009	0	0	54.74	3.93	$0
Apr 2009	0	0	46.77	3.59	$0
Mar 2009	0	0	42.14	4.06	$0
Feb 2009	0	0	32.81	4.63	$0
Jan 2009	0	0	35.86	5.37	$0
Dec 2008	0	0	37.10	5.98	$0
Nov 2008	0	0	55.49	6.86	$0
Oct 2008	0	0	75.24	6.92	$0
Sep 2008	0	0	101.76	7.88	$0
Aug 2008	0	0	114.22	8.48	$0
Jul 2008	0	0	131.08	11.39	$0
Jun 2008	0	0	131.33	13.03	$0
May 2008	0	0	123.17	11.57	$0
Apr 2008	0	0	110.31	10.45	$0
Mar 2008	0	0	101.90	9.66	$0
Feb 2008	0	0	92.53	8.77	$0
Jan 2008	0	0	90.38	8.21	$0
Dec 2007	0	0	88.33	7.30	$0
Nov 2007	0	0	91.67	7.29	$0
Oct 2007	0	0	82.85	6.92	$0
Sep 2007	0	0	75.84	6.24	$0
Aug 2007	0	0	69.06	6.39	$0
Jul 2007	0	0	70.90	6.39	$0
Jun 2007	0	0	62.00	7.55	$0
May 2007	0	0	58.74	7.85	$0
Apr 2007	0	0	59.61	7.81	$0
Mar 2007	0	0	56.92	7.30	$0
Feb 2007	0	0	55.10	8.22	$0
Jan 2007	0	0	50.30	6.73	$0
Dec 2006	0	0	56.65	6.92	$0
Nov 2006	0	0	54.20	7.62	$0
Oct 2006	0	0	54.90	6.01	$0
Sep 2006	0	0	60.08	5.04	$0
Aug 2006	0	0	68.71	7.34	$0
Jul 2006	0	0	69.37	6.34	$0
Jun 2006	0	0	66.28	6.38	$0
May 2006	0	0	66.01	6.42	$0
Apr 2006	0	0	64.39	7.36	$0
Mar 2006	0	0	56.70	7.08	$0
Feb 2006	0	0	57.59	7.75	$0
Jan 2006	0	0	60.59	8.93	$0
Dec 2005	0	0	54.94	13.42	$0
Nov 2005	0	0	54.69	10.59	$0
Oct 2005	158	3	58.34	13.80	$9,259
Sep 2005	0	30	61.45	12.08	$362
Aug 2005	178	31	61.51	9.80	$11,252
Jul 2005	183	31	55.69	7.84	$10,434
Jun 2005	523	30	52.33	7.38	$27,590
May 2005	185	31	45.22	6.65	$8,572
Apr 2005	143	20	49.20	7.36	$7,183
Mar 2005	0	27	50.37	7.15	$193
Feb 2005	336	28	45.22	6.31	$15,371
Jan 2005	164	31	43.16	6.32	$7,274
Dec 2004	210	18	39.86	6.75	$8,492
Nov 2004	138	30	45.28	6.33	$6,439
Oct 2004	2	25	49.70	6.52	$262
Sep 2004	145	30	43.24	5.28	$6,428
Aug 2004	345	31	42.37	5.55	$14,790
Jul 2004	374	25	38.28	6.08	$14,469
Jun 2004	362	30	36.10	6.43	$13,261
May 2004	191	31	37.48	6.49	$7,360
Apr 2004	190	30	34.47	5.86	$6,725
Mar 2004	333	31	34.36	5.53	$11,613
Feb 2004	186	20	32.45	5.51	$6,146
Jan 2004	341	31	32.03	6.30	$11,118
Dec 2003	346	31	30.26	6.30	$10,665
Nov 2003	378	30	28.80	4.60	$11,024
Oct 2003	382	31	28.17	4.76	$10,908
Sep 2003	375	30	26.31	4.75	$10,009
Aug 2003	387	31	29.76	5.13	$11,676
Jul 2003	704	29	29.41	5.17	$20,855
Jun 2003	178	29	28.56	5.98	$5,257
May 2003	169	61	26.59	5.97	$4,858
Apr 2003	454	133	26.67	5.41	$12,827
Mar 2003	371	31	31.14	6.10	$11,742
Feb 2003	336	66	33.48	7.93	$11,772
Jan 2003	503	189	30.31	5.58	$16,301
Dec 2002	525	176	26.91	4.85	$14,982
Nov 2002	343	38	24.66	4.14	$8,616
Oct 2002	661	220	26.46	4.23	$18,420
Sep 2002	669	442	27.44	3.64	$19,964
Aug 2002	664	820	25.96	3.16	$19,832
Jul 2002	1,003	452	24.58	3.06	$26,038
Jun 2002	381	21	23.73	3.34	$9,111
May 2002	1,024	29	24.66	3.58	$25,356
Apr 2002	364	27	23.65	3.51	$8,703
Mar 2002	842	31	22.00	3.10	$18,620
Feb 2002	181	28	18.22	2.38	$3,364
Jan 2002	24	31	17.17	2.38	$486
Dec 2001	177	31	16.93	2.36	$3,070
Nov 2001	3	9	18.07	2.41	$76
Oct 2001	499	25	19.78	2.53	$9,933
Sep 2001	159	30	24.26	2.25	$3,925
Aug 2001	675	31	24.87	3.05	$16,882
Jul 2001	326	27	23.93	3.20	$7,888
Jun 2001	681	22	24.56	3.82	$16,809
May 2001	165	22	25.52	4.31	$4,306
Apr 2001	690	21	24.68	5.34	$17,141
Mar 2001	676	31	24.54	5.38	$16,756
Feb 2001	1,042	65	27.75	5.77	$29,290
Jan 2001	1,056	702	27.47	8.40	$34,904
Dec 2000	348	23	26.88	9.12	$9,564
Nov 2000	350	30	32.21	5.66	$11,443
Oct 2000	713	31	31.23	5.15	$22,427
Sep 2000	730	30	31.87	5.19	$23,421
Aug 2000	335	28	29.64	4.54	$10,057
Jul 2000	361	25	28.53	4.09	$10,402
Jun 2000	368	44	29.30	4.40	$10,976
May 2000	714	344	27.26	3.68	$20,729
Apr 2000	367	384	24.51	3.12	$10,192
Mar 2000	894	697	28.42	2.86	$27,401
Feb 2000	685	393	27.62	2.73	$19,991
Jan 2000	697	333	25.27	2.48	$18,439
Dec 1999	344	31	24.28	2.42	$8,427
Nov 1999	1,059	160	23.19	2.43	$24,948
Oct 1999	711	449	20.98	2.80	$16,176
Sep 1999	706	663	21.75	2.62	$17,092
Aug 1999	341	737	19.26	2.88	$8,687
Jul 1999	718	778	17.89	2.37	$14,691
Jun 1999	1,009	662	15.94	2.36	$17,647
May 1999	696	918	15.79	2.32	$13,121
Apr 1999	355	642	15.10	2.21	$6,778
Mar 1999	856	1,439	12.47	1.84	$13,320
Feb 1999	1,027	743	9.98	1.82	$11,600
Jan 1999	682	1,421	10.38	1.90	$9,779
Dec 1998	1,067	1,676	9.20	1.77	$12,788
Nov 1998	703	2,185	10.89	2.19	$12,431
Oct 1998	710	2,674	12.42	1.97	$14,084
Sep 1998	1,413	3,415	12.59	2.08	$24,902
Aug 1998	1,410	4,838	11.30	1.91	$25,161
Jul 1998	2,816	6,820	11.74	2.24	$48,318
Jun 1998	2,486	5,095	11.24	2.24	$39,342
May 1998	3,615	4,558	12.62	2.21	$55,678
Apr 1998	5,120	3,706	13.04	2.51	$76,050
Mar 1998	3,912	1,270	12.80	2.31	$53,007
Feb 1998	7,465	8,650	13.95	2.30	$124,024
Jan 1998	20,865	589	14.70	2.15	$307,985
Dec 1997	19,880	19	16.32	2.41	$324,487

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.

Jul 2010 — as filed, then multipliedworked

Oil                    1 bbl  × $ 72.55 =        $73
Casinghead gas         0 Mcf  × $  4.74 =         $0

────────────────────────────────────────────────────
Month total                                      $73

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. 01/O/14199 is the state's own key, not one this site invented.