SABINE-TRAM, SW UNIT

Name: SABINE-TRAM, SW UNIT lease production and value, Jan 1993 onwards
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

Operated by CONTINENTAL OPERATING CO. (P-5 173749) in the SABINE TRAM, SW (WILCOX 11,500) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 20519District 03Field 79378400OilCasinghead gasSave Export

Value, all time

$12.8 M

Jan 1993 – Jul 2018

Value, last 12 filed months

at the published price for each month

Months reported

307

no gaps in the span

Streams

oil, casinghead gas

The SABINE TRAM, SW (WILCOX 11,500) 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 10 leases and 20 wells, and the rule below applies to all of them.

Discovered

1984-05-09

as the register files it

Field class

Oil and gas

the register's own label

Between wells

1,867 ft

minimum

From a lease line

660 ft

minimum

A drilling unit in this field needs at least 160 acres. The field rule took effect on 1993-10-11.

The Commission's schedule remark for this field reads: “(WILCOX 11500) EFF. 4-24-89. PERMANENT FIELD RULES ADOPTED.”

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	411,259 bbl	$10,206,888
Casinghead gas	Production	1,462,621 Mcf	$2,592,097
Total			$12,798,986

853,308 Mcf of this lease's gas, across 47 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 (9)

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 30.4418, -93.8143. A lease has no coordinate of its own — that point is the mean of its wells, and they span 3.3 miles.

30.44183, -93.82019 · 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%

9 of 9 wells

With a plug date

100.0%

9 of 9 wells

Median depth

12,010 ft

9 wells filed one

Completion to plug

24.9 years

median over 9 wells

What the state filed about each well

On the RRC proration schedule

9100.0%

A plug date is filed

9100.0%

BothOn the schedule and plugged. Neither fact cancels the other.

9100.0%

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

Total depth in feet, 9 of 9 wells. Median 12,010 ft, with the middle half between 11,907 and 12,100 ft; the shallowest is 11,699 ft and the deepest 12,505 ft. The median is published rather than the mean, because a single mis-keyed depth moves a mean and cannot move a median.

When they were last completed

Last completion by decade, 9 of 9 wells, May 1985 – Nov 1993. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed

May 1985 – Nov 1993

9 of 9 wells

Plug dates filed

Aug 2009 – Dec 2017

9 of 9 wells

Last completion to plug: a median of 24.9 years across the 9 wells that filed both dates, with the middle half between 22.9 years and 27.3 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

9 wells


42-35130457	2	11,699 ft	Nov 1993	Oct 2016	Yes
42-35130399	7	12,050 ft	May 1992	Sep 2015	Yes
42-35130343	1B	12,505 ft	Feb 1992	Aug 2009	Yes
42-35130397	1	12,010 ft	Oct 1991	Aug 2009	Yes
42-35130448	5	11,750 ft	Oct 1991	Sep 2016	Yes
42-35130372	4	11,907 ft	Jul 1989	Jun 2016	Yes
42-35130385	3	12,000 ft	Jul 1988	Oct 2015	Yes
42-35130445	8	12,100 ft	May 1985	Nov 2017	Yes
42-35130440	6	12,100 ft	May 1985	Dec 2017	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 (307)

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

307 months


Jul 2018	0	0	65.14	2.93	$0
Jun 2018	0	0	60.18	3.08	$0
May 2018	0	0	65.38	2.90	$0
Apr 2018	0	0	63.84	2.90	$0
Mar 2018	0	0	61.22	2.79	$0
Feb 2018	0	0	61.78	2.77	$0
Jan 2018	0	0	62.87	4.01	$0
Dec 2017	0	0	57.27	2.92	$0
Nov 2017	0	0	55.42	3.12	$0
Oct 2017	0	0	49.29	2.98	$0
Sep 2017	0	0	47.52	3.09	$0
Aug 2017	0	0	45.37	3.00	$0
Jul 2017	0	0	43.87	3.09	$0
Jun 2017	0	0	42.49	3.09	$0
May 2017	0	0	45.37	3.26	$0
Apr 2017	0	0	47.93	3.21	$0
Mar 2017	0	0	46.77	2.98	$0
Feb 2017	0	0	50.45	2.95	$0
Jan 2017	0	0	49.41	3.42	$0
Dec 2016	0	0	48.76	3.72	$0
Nov 2016	0	0	42.49	2.64	$0
Oct 2016	0	0	46.19	3.09	$0
Sep 2016	0	0	41.55	3.10	$0
Aug 2016	0	0	41.44	2.92	$0
Jul 2016	0	0	41.62	2.92	$0
Jun 2016	0	0	45.35	2.69	$0
May 2016	0	0	42.52	1.99	$0
Apr 2016	0	0	36.56	1.99	$0
Mar 2016	0	0	33.01	1.79	$0
Feb 2016	0	0	26.47	2.06	$0
Jan 2016	0	0	27.35	2.36	$0
Dec 2015	0	0	32.36	2.00	$0
Nov 2015	0	0	38.79	2.17	$0
Oct 2015	0	0	43.55	2.43	$0
Sep 2015	0	0	42.99	2.76	$0
Aug 2015	0	0	40.16	2.87	$0
Jul 2015	0	0	48.15	2.95	$0
Jun 2015	105	0	56.15	2.88	$5,896
May 2015	46	0	55.21	2.96	$2,540
Apr 2015	90	0	49.82	2.71	$4,484
Mar 2015	78	0	42.89	2.93	$3,345
Feb 2015	192	0	44.66	2.98	$8,575
Jan 2015	310	0	43.43	3.10	$13,463
Dec 2014	0	0	54.69	3.59	$0
Nov 2014	246	0	70.46	4.25	$17,333
Oct 2014	171	0	78.30	3.90	$13,389
Sep 2014	0	0	86.16	4.05	$0
Aug 2014	59	0	89.39	4.04	$5,274
Jul 2014	114	0	96.56	4.18	$11,008
Jun 2014	271	0	98.16	4.74	$26,601
May 2014	0	0	94.73	4.73	$0
Apr 2014	59	0	95.94	4.81	$5,660
Mar 2014	60	0	95.89	5.06	$5,753
Feb 2014	138	0	97.40	6.19	$13,441
Jan 2014	138	512	90.40	4.86	$14,964
Dec 2013	59	565	91.82	4.35	$7,878
Nov 2013	0	478	88.85	3.74	$1,787
Oct 2013	191	539	97.42	3.78	$20,644
Sep 2013	133	552	104.11	3.72	$15,899
Aug 2013	115	607	104.25	3.52	$14,127
Jul 2013	132	589	102.52	3.72	$15,722
Jun 2013	0	424	94.40	3.93	$1,668
May 2013	76	531	94.83	4.15	$9,410
Apr 2013	279	348	93.96	4.28	$27,705
Mar 2013	0	370	93.62	3.91	$1,448
Feb 2013	207	328	91.23	3.42	$20,006
Jan 2013	148	313	91.60	3.42	$14,627
Dec 2012	155	404	86.77	3.42	$14,831
Nov 2012	167	523	86.95	3.62	$16,417
Oct 2012	0	610	89.38	3.40	$2,074
Sep 2012	322	652	94.67	2.92	$32,387
Aug 2012	219	904	92.66	2.91	$22,922
Jul 2012	449	986	85.13	3.02	$41,202
Jun 2012	152	879	79.82	2.52	$14,347
May 2012	0	0	91.61	2.49	$0
Apr 2012	159	267	101.65	2.00	$16,696
Mar 2012	309	1,161	105.05	2.22	$35,040
Feb 2012	261	626	101.10	2.57	$27,996
Jan 2012	277	944	98.09	2.73	$29,752
Dec 2011	102	1,473	96.87	3.24	$14,653
Nov 2011	148	1,320	95.72	3.31	$18,537
Oct 2011	433	1,838	84.98	3.65	$43,502
Sep 2011	85	590	83.62	3.99	$9,459
Aug 2011	176	636	83.40	4.15	$17,317
Jul 2011	105	604	94.14	4.52	$12,613
Jun 2011	79	491	92.90	4.64	$9,617
May 2011	80	372	98.13	4.40	$9,489
Apr 2011	77	378	105.96	4.33	$9,797
Mar 2011	145	495	96.36	4.06	$15,981
Feb 2011	59	277	85.64	4.18	$6,211
Jan 2011	221	565	86.50	4.59	$21,709
Dec 2010	136	1,107	85.73	4.35	$16,472
Nov 2010	270	1,174	80.84	3.80	$26,283
Oct 2010	559	3,375	78.10	3.51	$55,500
Sep 2010	136	645	72.63	3.98	$12,444
Aug 2010	491	1,265	73.68	4.42	$41,767
Jul 2010	0	556	72.55	4.74	$2,633
Jun 2010	354	828	70.36	4.91	$28,973
May 2010	177	1,026	71.12	4.24	$16,934
Apr 2010	524	789	81.69	4.12	$46,058
Mar 2010	181	915	78.39	4.39	$18,204
Feb 2010	180	678	73.58	5.44	$16,934
Jan 2010	360	975	74.36	5.96	$32,585
Dec 2009	333	905	71.44	5.48	$28,752
Nov 2009	663	1,306	74.59	3.75	$54,353
Oct 2009	169	1,440	72.54	4.11	$18,178
Sep 2009	688	1,457	65.54	3.06	$49,557
Aug 2009	0	1,433	67.42	3.22	$4,612
Jul 2009	354	1,294	61.13	3.46	$26,123
Jun 2009	522	1,474	66.16	3.90	$40,277
May 2009	177	1,653	54.74	3.93	$16,178
Apr 2009	369	1,625	46.77	3.59	$23,088
Mar 2009	720	1,789	42.14	4.06	$37,602
Feb 2009	341	1,375	32.81	4.63	$17,559
Jan 2009	732	659	35.86	5.37	$29,789
Dec 2008	0	1,072	37.10	5.98	$6,407
Nov 2008	367	701	55.49	6.86	$25,174
Oct 2008	369	850	75.24	6.92	$33,647
Sep 2008	165	328	101.76	7.88	$19,374
Aug 2008	711	357	114.22	8.48	$84,239
Jul 2008	365	527	131.08	11.39	$53,846
Jun 2008	547	1,287	131.33	13.03	$88,611
May 2008	337	432	123.17	11.57	$46,508
Apr 2008	492	828	110.31	10.45	$62,929
Mar 2008	322	834	101.90	9.66	$40,872
Feb 2008	658	822	92.53	8.77	$68,094
Jan 2008	481	674	90.38	8.21	$49,003
Dec 2007	497	1,245	88.33	7.30	$52,991
Nov 2007	165	1,095	91.67	7.29	$23,110
Oct 2007	487	1,225	82.85	6.92	$48,827
Sep 2007	318	1,727	75.84	6.24	$34,901
Aug 2007	794	1,985	69.06	6.39	$67,514
Jul 2007	327	2,282	70.90	6.39	$37,762
Jun 2007	510	2,426	62.00	7.55	$49,933
May 2007	343	1,872	58.74	7.85	$34,836
Apr 2007	851	1,685	59.61	7.81	$63,880
Mar 2007	1,181	2,252	56.92	7.30	$83,667
Feb 2007	515	1,788	55.10	8.22	$43,067
Jan 2007	325	430	50.30	6.73	$19,240
Dec 2006	1,547	1,984	56.65	6.92	$101,364
Nov 2006	475	2,679	54.20	7.62	$46,152
Oct 2006	814	2,401	54.90	6.01	$59,128
Sep 2006	677	2,394	60.08	5.04	$52,733
Aug 2006	678	2,636	68.71	7.34	$65,933
Jul 2006	1,128	2,934	69.37	6.34	$96,859
Jun 2006	677	2,903	66.28	6.38	$63,404
May 2006	1,159	2,563	66.01	6.42	$92,973
Apr 2006	846	2,556	64.39	7.36	$73,287
Mar 2006	1,167	2,662	56.70	7.08	$85,024
Feb 2006	489	3,033	57.59	7.75	$51,671
Jan 2006	835	3,579	60.59	8.93	$82,565
Dec 2005	1,169	2,611	54.94	13.42	$99,252
Nov 2005	169	1,500	54.69	10.59	$25,125
Oct 2005	162	0	58.34	13.80	$9,451
Sep 2005	796	2,173	61.45	12.08	$75,162
Aug 2005	939	3,192	61.51	9.80	$89,029
Jul 2005	1,279	3,384	55.69	7.84	$97,770
Jun 2005	1,169	3,641	52.33	7.38	$88,048
May 2005	1,164	3,755	45.22	6.65	$77,611
Apr 2005	1,161	3,650	49.20	7.36	$83,987
Mar 2005	1,175	2,778	50.37	7.15	$79,061
Feb 2005	1,180	3,029	45.22	6.31	$72,478
Jan 2005	1,183	3,391	43.16	6.32	$72,497
Dec 2004	1,004	2,641	39.86	6.75	$57,849
Nov 2004	1,173	0	45.28	6.33	$53,113
Oct 2004	1,305	2,239	49.70	6.52	$79,446
Sep 2004	986	3,771	43.24	5.28	$62,560
Aug 2004	1,149	4,110	42.37	5.55	$71,496
Jul 2004	959	3,850	38.28	6.08	$60,135
Jun 2004	944	3,328	36.10	6.43	$55,487
May 2004	997	3,860	37.48	6.49	$62,437
Apr 2004	1,057	2,951	34.47	5.86	$53,723
Mar 2004	1,186	2,405	34.36	5.53	$54,051
Feb 2004	1,359	3,711	32.45	5.51	$64,546
Jan 2004	1,536	2,648	32.03	6.30	$65,880
Dec 2003	840	4,176	30.26	6.30	$51,734
Nov 2003	1,515	3,906	28.80	4.60	$61,581
Oct 2003	1,313	3,845	28.17	4.76	$55,288
Sep 2003	1,354	4,179	26.31	4.75	$55,471
Aug 2003	1,144	4,467	29.76	5.13	$56,960
Jul 2003	1,325	5,264	29.41	5.17	$66,188
Jun 2003	1,161	3,975	28.56	5.98	$56,940
May 2003	1,513	4,649	26.59	5.97	$67,998
Apr 2003	1,343	4,658	26.67	5.41	$61,005
Mar 2003	1,375	3,447	31.14	6.10	$63,831
Feb 2003	1,171	3,188	33.48	7.93	$64,473
Jan 2003	1,361	3,895	30.31	5.58	$62,994
Dec 2002	1,500	3,876	26.91	4.85	$59,178
Nov 2002	1,175	4,149	24.66	4.14	$46,140
Oct 2002	1,465	5,548	26.46	4.23	$62,227
Sep 2002	1,162	4,552	27.44	3.64	$48,433
Aug 2002	1,549	5,500	25.96	3.16	$57,615
Jul 2002	1,482	4,499	24.58	3.06	$50,202
Jun 2002	1,036	5,130	23.73	3.34	$41,709
May 2002	1,383	4,246	24.66	3.58	$49,322
Apr 2002	1,594	3,740	23.65	3.51	$50,834
Mar 2002	1,541	2,332	22.00	3.10	$41,138
Feb 2002	1,210	2,241	18.22	2.38	$27,370
Jan 2002	1,221	3,030	17.17	2.38	$28,163
Dec 2001	1,288	3,629	16.93	2.36	$30,386
Nov 2001	1,114	4,688	18.07	2.41	$31,407
Oct 2001	1,449	4,967	19.78	2.53	$41,222
Sep 2001	1,163	4,366	24.26	2.25	$38,044
Aug 2001	1,379	4,447	24.87	3.05	$47,873
Jul 2001	1,170	4,723	23.93	3.20	$43,098
Jun 2001	1,078	4,390	24.56	3.82	$43,264
May 2001	1,228	4,500	25.52	4.31	$50,722
Apr 2001	1,545	4,337	24.68	5.34	$61,270
Mar 2001	1,484	4,587	24.54	5.38	$61,079
Feb 2001	930	4,726	27.75	5.77	$53,063
Jan 2001	1,135	5,594	27.47	8.40	$78,161
Dec 2000	1,188	5,044	26.88	9.12	$77,947
Nov 2000	894	6,717	32.21	5.66	$66,801
Oct 2000	1,329	5,123	31.23	5.15	$67,865
Sep 2000	1,316	4,574	31.87	5.19	$65,664
Aug 2000	1,217	5,320	29.64	4.54	$60,229
Jul 2000	1,158	4,896	28.53	4.09	$53,061
Jun 2000	1,204	5,594	29.30	4.40	$59,875
May 2000	656	1,555	27.26	3.68	$23,605
Apr 2000	1,088	6,347	24.51	3.12	$46,444
Mar 2000	1,801	7,163	28.42	2.86	$71,669
Feb 2000	813	5,187	27.62	2.73	$36,597
Jan 2000	1,133	4,628	25.27	2.48	$40,111
Dec 1999	1,497	0	24.28	2.42	$36,347
Nov 1999	1,136	4,479	23.19	2.43	$37,246
Oct 1999	1,130	4,372	20.98	2.80	$35,965
Sep 1999	1,439	4,804	21.75	2.62	$43,879
Aug 1999	1,216	5,551	19.26	2.88	$39,383
Jul 1999	1,075	5,370	17.89	2.37	$31,971
Jun 1999	1,309	5,352	15.94	2.36	$33,507
May 1999	2,098	5,702	15.79	2.32	$46,362
Apr 1999	1,290	5,541	15.10	2.21	$31,714
Mar 1999	1,233	5,890	12.47	1.84	$26,203
Feb 1999	1,266	4,942	9.98	1.82	$21,618
Jan 1999	1,231	4,235	10.38	1.90	$20,824
Dec 1998	2,141	4,924	9.20	1.77	$28,429
Nov 1998	1,460	5,420	10.89	2.19	$27,746
Oct 1998	1,778	4,726	12.42	1.97	$31,389
Sep 1998	1,558	6,767	12.59	2.08	$33,708
Aug 1998	1,701	7,077	11.30	1.91	$32,720
Jul 1998	1,922	6,762	11.74	2.24	$37,693
Jun 1998	1,369	5,207	11.24	2.24	$27,037
May 1998	1,773	8,114	12.62	2.21	$40,278
Apr 1998	1,737	0	13.04	2.51	$22,650
Mar 1998	1,876	0	12.80	2.31	$24,013
Feb 1998	1,667	6,719	13.95	2.30	$38,703
Jan 1998	2,030	5,777	14.70	2.15	$42,289
Dec 1997	2,149	5,862	16.32	2.41	$49,206
Nov 1997	1,667	6,525	18.19	3.09	$50,474
Oct 1997	2,174	6,677	19.25	3.15	$62,881
Sep 1997	1,426	7,071	17.74	2.95	$46,191
Aug 1997	1,929	7,280	17.86	2.55	$53,050
Jul 1997	2,185	7,208	17.58	2.25	$54,608
Jun 1997	1,872	8,287	17.24	2.26	$50,979
May 1997	2,070	9,079	18.97	2.31	$60,227
Apr 1997	2,584	8,508	17.88	2.08	$63,922
Mar 1997	1,709	9,242	18.95	1.94	$50,307
Feb 1997	2,181	8,283	20.49	2.21	$62,960
Jan 1997	2,071	9,406	23.48	3.54	$81,922
Dec 1996	2,144	7,790	23.32	—	$49,998
Nov 1996	2,259	9,609	21.97	—	$49,630
Oct 1996	2,433	10,327	23.31	—	$56,713
Sep 1996	2,206	10,370	22.22	—	$49,017
Aug 1996	2,380	0	20.26	—	$48,219
Jul 1996	1,990	8,053	19.55	—	$38,905
Jun 1996	2,169	7,377	18.73	—	$40,625
May 1996	2,141	9,810	19.43	—	$41,600
Apr 1996	2,213	9,053	21.51	—	$47,602
Mar 1996	2,150	9,731	19.38	—	$41,667
Feb 1996	1,511	8,053	16.98	—	$25,657
Jan 1996	1,599	5,102	17.07	—	$27,295
Dec 1995	1,719	5,307	17.19	—	$29,550
Nov 1995	1,834	5,620	16.00	—	$29,344
Oct 1995	2,167	6,772	15.43	—	$33,437
Sep 1995	2,237	7,155	16.18	—	$36,195
Aug 1995	1,897	6,000	15.92	—	$30,200
Jul 1995	1,900	7,573	15.24	—	$28,956
Jun 1995	2,367	8,036	16.41	—	$38,842
May 1995	2,357	7,718	17.56	—	$41,389
Apr 1995	2,179	8,711	17.73	—	$38,634
Mar 1995	2,405	8,458	16.44	—	$39,538
Feb 1995	2,520	8,011	16.58	—	$41,782
Jan 1995	3,230	10,696	15.92	—	$51,422
Dec 1994	3,367	11,986	15.03	—	$50,606
Nov 1994	3,307	13,262	15.90	—	$52,581
Oct 1994	3,726	13,949	15.58	—	$58,051
Sep 1994	3,779	14,705	15.29	—	$57,781
Aug 1994	4,083	15,771	16.13	—	$65,859
Jul 1994	4,287	15,826	17.56	—	$75,280
Jun 1994	4,300	16,685	17.09	—	$73,487
May 1994	4,607	16,514	15.88	—	$73,159
Apr 1994	4,770	19,521	14.14	—	$67,448
Mar 1994	5,769	23,021	12.46	—	$71,882
Feb 1994	5,551	21,016	12.50	—	$69,388
Jan 1994	6,249	23,428	12.66	—	$79,112
Dec 1993	6,711	22,623	12.33	—	$82,747
Nov 1993	6,740	25,863	14.49	—	$97,663
Oct 1993	7,127	24,597	15.85	—	$112,963
Sep 1993	7,727	26,884	15.03	—	$116,137
Aug 1993	7,986	31,812	15.66	—	$125,061
Jul 1993	10,590	36,917	15.46	—	$163,721
Jun 1993	11,868	43,536	16.79	—	$199,264
May 1993	12,527	51,453	17.68	—	$221,477
Apr 1993	14,729	56,991	18.05	—	$265,858
Mar 1993	15,935	59,201	18.14	—	$289,061
Feb 1993	8,591	36,852	17.90	—	$153,779
Jan 1993	10,631	45,563	16.93	—	$179,983

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.

Jun 2015 — as filed, then multipliedworked

Oil                  105 bbl  × $ 56.15 =     $5,896
Casinghead gas         0 Mcf  × $  2.88 =         $0

────────────────────────────────────────────────────
Month total                                   $5,896

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. 03/O/20519 is the state's own key, not one this site invented.