GOLLADAY

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

Operated by MURCHISON OIL AND GAS, LLC (P-5 593667) in the AZALEA (DEVONIAN) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Gas lease lease 19496District 08Field 04605222CondensateGasSave Export

Value, all time

$4.3 M

Jan 1993 – Nov 2021

Value, last 12 filed months

$8 k

at the published price for each month

Months reported

347

no gaps in the span

Streams

condensate, gas

The AZALEA (DEVONIAN) 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 244 leases and 262 wells, and the rule below applies to all of them.

Discovered

1957-03-02

as the register files it

Field class

Oil and gas

the register's own label

Between wells

1,200 ft

minimum

From a lease line

467 ft

minimum

A drilling unit in this field needs at least 40 acres. The field rule took effect on 2002-03-01.

The Commission's schedule remark for this field reads: “PSUEDO RULES FRO HORIZONTALS”

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
Condensate	Disposition	10,576 bbl	$263,574
Gas	Production	1,319,085 Mcf	$4,066,017
Total			$4,329,591

439,575 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.

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 31.9774, -101.9377. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

31.97741, -101.93772 · 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

11,571 ft

1 wells filed one

Completion to plug

61.4 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 11,571 ft.

Completions filed

Apr 1960

1 of 1 wells

Plug dates filed

Sep 2021

1 of 1 wells

Last completion to plug: a median of 61.4 years across the 1 well that filed both dates, with the middle half between 61.4 years and 61.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

1 well


42-32900027	D 4	11,571 ft	Apr 1960	Sep 2021	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 (347)

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

347 months


Nov 2021	0	0	77.43	5.24	$0
Oct 2021	0	0	79.79	5.71	$0
Sep 2021	109	0	69.86	5.35	$7,615
Aug 2021	0	0	66.02	4.22	$0
Jul 2021	0	0	70.78	3.98	$0
Jun 2021	0	0	69.49	3.38	$0
May 2021	0	0	63.48	3.02	$0
Apr 2021	0	0	60.36	2.76	$0
Mar 2021	0	0	61.30	2.72	$0
Feb 2021	0	0	57.80	5.55	$0
Jan 2021	0	0	50.41	2.81	$0
Dec 2020	0	0	44.64	2.68	$0
Nov 2020	0	0	38.77	2.71	$0
Oct 2020	0	0	36.97	2.48	$0
Sep 2020	0	0	37.09	1.99	$0
Aug 2020	0	0	39.98	2.39	$0
Jul 2020	0	0	38.37	1.83	$0
Jun 2020	0	0	34.90	1.69	$0
May 2020	0	0	16.92	1.81	$0
Apr 2020	0	0	14.75	1.80	$0
Mar 2020	0	0	30.34	1.86	$0
Feb 2020	0	0	49.88	1.98	$0
Jan 2020	0	0	57.25	2.09	$0
Dec 2019	0	0	59.01	2.30	$0
Nov 2019	0	0	55.30	2.75	$0
Oct 2019	0	0	53.47	2.42	$0
Sep 2019	0	0	55.05	2.66	$0
Aug 2019	0	0	53.11	2.30	$0
Jul 2019	0	0	56.27	2.46	$0
Jun 2019	0	0	52.78	2.49	$0
May 2019	0	0	58.48	2.74	$0
Apr 2019	0	0	62.63	2.75	$0
Mar 2019	0	0	56.80	3.06	$0
Feb 2019	0	0	50.85	2.79	$0
Jan 2019	0	0	46.03	3.23	$0
Dec 2018	0	0	46.59	4.19	$0
Nov 2018	0	0	52.93	4.24	$0
Oct 2018	0	0	61.44	3.40	$0
Sep 2018	0	0	59.54	3.11	$0
Aug 2018	0	0	59.40	3.07	$0
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	0	0	56.15	2.88	$0
May 2015	0	0	55.21	2.96	$0
Apr 2015	0	0	49.82	2.71	$0
Mar 2015	0	0	42.89	2.93	$0
Feb 2015	0	0	44.66	2.98	$0
Jan 2015	0	0	43.43	3.10	$0
Dec 2014	0	0	54.69	3.59	$0
Nov 2014	0	0	70.46	4.25	$0
Oct 2014	0	0	78.30	3.90	$0
Sep 2014	0	0	86.16	4.05	$0
Aug 2014	0	210	89.39	4.04	$847
Jul 2014	0	1,420	96.56	4.18	$5,935
Jun 2014	0	1,345	98.16	4.74	$6,371
May 2014	0	1,234	94.73	4.73	$5,833
Apr 2014	0	1,443	95.94	4.81	$6,940
Mar 2014	0	1,537	95.89	5.06	$7,772
Feb 2014	0	1,274	97.40	6.19	$7,889
Jan 2014	0	1,360	90.40	4.86	$6,611
Dec 2013	0	1,374	91.82	4.35	$5,983
Nov 2013	0	1,269	88.85	3.74	$4,744
Oct 2013	0	1,349	97.42	3.78	$5,098
Sep 2013	0	1,346	104.11	3.72	$5,004
Aug 2013	0	1,428	104.25	3.52	$5,030
Jul 2013	0	1,409	102.52	3.72	$5,238
Jun 2013	0	1,428	94.40	3.93	$5,617
May 2013	0	1,425	94.83	4.15	$5,912
Apr 2013	0	1,260	93.96	4.28	$5,396
Mar 2013	0	1,282	93.62	3.91	$5,016
Feb 2013	0	1,091	91.23	3.42	$3,731
Jan 2013	0	1,195	91.60	3.42	$4,087
Dec 2012	0	1,175	86.77	3.42	$4,019
Nov 2012	0	1,119	86.95	3.62	$4,056
Oct 2012	0	1,191	89.38	3.40	$4,049
Sep 2012	0	1,166	94.67	2.92	$3,403
Aug 2012	0	1,193	92.66	2.91	$3,469
Jul 2012	0	678	85.13	3.02	$2,048
Jun 2012	0	408	79.82	2.52	$1,028
May 2012	0	591	91.61	2.49	$1,471
Apr 2012	0	576	101.65	2.00	$1,150
Mar 2012	0	517	105.05	2.22	$1,149
Feb 2012	0	552	101.10	2.57	$1,419
Jan 2012	0	551	98.09	2.73	$1,506
Dec 2011	0	509	96.87	3.24	$1,649
Nov 2011	0	456	95.72	3.31	$1,510
Oct 2011	0	438	84.98	3.65	$1,598
Sep 2011	0	485	83.62	3.99	$1,933
Aug 2011	0	456	83.40	4.15	$1,892
Jul 2011	0	462	94.14	4.52	$2,087
Jun 2011	0	433	92.90	4.64	$2,009
May 2011	0	492	98.13	4.40	$2,167
Apr 2011	0	466	105.96	4.33	$2,019
Mar 2011	0	464	96.36	4.06	$1,883
Feb 2011	0	286	85.64	4.18	$1,195
Jan 2011	0	390	86.50	4.59	$1,790
Dec 2010	0	406	85.73	4.35	$1,765
Nov 2010	0	438	80.84	3.80	$1,662
Oct 2010	0	485	78.10	3.51	$1,702
Sep 2010	0	448	72.63	3.98	$1,783
Aug 2010	0	417	73.68	4.42	$1,843
Jul 2010	0	429	72.55	4.74	$2,032
Jun 2010	0	62	70.36	4.91	$304
May 2010	0	178	71.12	4.24	$754
Apr 2010	0	204	81.69	4.12	$841
Mar 2010	0	275	78.39	4.39	$1,207
Feb 2010	0	237	73.58	5.44	$1,290
Jan 2010	0	263	74.36	5.96	$1,569
Dec 2009	0	264	71.44	5.48	$1,448
Nov 2009	0	407	74.59	3.75	$1,527
Oct 2009	0	0	72.54	4.11	$0
Sep 2009	0	10	65.54	3.06	$31
Aug 2009	0	16	67.42	3.22	$52
Jul 2009	0	16	61.13	3.46	$55
Jun 2009	0	19	66.16	3.90	$74
May 2009	0	39	54.74	3.93	$153
Apr 2009	0	12	46.77	3.59	$43
Mar 2009	0	62	42.14	4.06	$252
Feb 2009	0	309	32.81	4.63	$1,432
Jan 2009	0	302	35.86	5.37	$1,622
Dec 2008	0	253	37.10	5.98	$1,512
Nov 2008	0	114	55.49	6.86	$782
Oct 2008	0	0	75.24	6.92	$0
Sep 2008	0	0	101.76	7.88	$0
Aug 2008	0	1,139	114.22	8.48	$9,662
Jul 2008	0	1,090	131.08	11.39	$12,414
Jun 2008	0	861	131.33	13.03	$11,221
May 2008	0	2,186	123.17	11.57	$25,301
Apr 2008	0	4,136	110.31	10.45	$43,241
Mar 2008	0	4,270	101.90	9.66	$41,266
Feb 2008	180	3,940	92.53	8.77	$51,211
Jan 2008	0	4,175	90.38	8.21	$34,259
Dec 2007	0	4,268	88.33	7.30	$31,165
Nov 2007	0	4,343	91.67	7.29	$31,668
Oct 2007	0	4,648	82.85	6.92	$32,173
Sep 2007	0	4,534	75.84	6.24	$28,311
Aug 2007	183	4,732	69.06	6.39	$42,866
Jul 2007	0	4,683	70.90	6.39	$29,915
Jun 2007	0	4,578	62.00	7.55	$34,557
May 2007	0	4,817	58.74	7.85	$37,796
Apr 2007	0	4,687	59.61	7.81	$36,583
Mar 2007	179	4,888	56.92	7.30	$45,881
Feb 2007	0	4,323	55.10	8.22	$35,518
Jan 2007	0	4,717	50.30	6.73	$31,731
Dec 2006	0	4,851	56.65	6.92	$33,561
Nov 2006	217	4,741	54.20	7.62	$47,876
Oct 2006	0	5,307	54.90	6.01	$31,915
Sep 2006	0	3,705	60.08	5.04	$18,663
Aug 2006	0	1,686	68.71	7.34	$12,375
Jul 2006	0	3,782	69.37	6.34	$23,988
Jun 2006	0	2,264	66.28	6.38	$14,453
May 2006	0	3,279	66.01	6.42	$21,068
Apr 2006	0	3,795	64.39	7.36	$27,933
Mar 2006	0	3,961	56.70	7.08	$28,055
Feb 2006	0	3,628	57.59	7.75	$28,121
Jan 2006	0	4,317	60.59	8.93	$38,565
Dec 2005	192	4,544	54.94	13.42	$71,508
Nov 2005	0	4,639	54.69	10.59	$49,120
Oct 2005	1	4,912	58.34	13.80	$67,823
Sep 2005	0	4,305	61.45	12.08	$52,000
Aug 2005	0	4,946	61.51	9.80	$48,455
Jul 2005	0	5,133	55.69	7.84	$40,261
Jun 2005	0	5,075	52.33	7.38	$37,459
May 2005	165	5,219	45.22	6.65	$42,174
Apr 2005	0	5,203	49.20	7.36	$38,297
Mar 2005	0	5,556	50.37	7.15	$39,753
Feb 2005	0	5,007	45.22	6.31	$31,604
Jan 2005	192	5,653	43.16	6.32	$44,026
Dec 2004	0	5,416	39.86	6.75	$36,564
Nov 2004	0	4,977	45.28	6.33	$31,507
Oct 2004	0	5,353	49.70	6.52	$34,875
Sep 2004	0	5,352	43.24	5.28	$28,279
Aug 2004	0	5,519	42.37	5.55	$30,634
Jul 2004	158	5,665	38.28	6.08	$40,515
Jun 2004	0	5,702	36.10	6.43	$36,681
May 2004	0	5,989	37.48	6.49	$38,896
Apr 2004	0	5,516	34.47	5.86	$32,315
Mar 2004	0	5,955	34.36	5.53	$32,932
Feb 2004	164	5,376	32.45	5.51	$34,942
Jan 2004	0	5,804	32.03	6.30	$36,563
Dec 2003	0	5,988	30.26	6.30	$37,734
Nov 2003	200	6,019	28.80	4.60	$33,418
Oct 2003	0	6,072	28.17	4.76	$28,901
Sep 2003	0	6,216	26.31	4.75	$29,522
Aug 2003	0	5,826	29.76	5.13	$29,886
Jul 2003	0	6,432	29.41	5.17	$33,259
Jun 2003	0	5,495	28.56	5.98	$32,876
May 2003	177	6,513	26.59	5.97	$43,606
Apr 2003	0	5,602	26.67	5.41	$30,292
Mar 2003	0	6,427	31.14	6.10	$39,179
Feb 2003	0	5,369	33.48	7.93	$42,554
Jan 2003	120	6,111	30.31	5.58	$37,749
Dec 2002	0	6,522	26.91	4.85	$31,656
Nov 2002	178	5,673	24.66	4.14	$27,858
Oct 2002	0	6,501	26.46	4.23	$27,494
Sep 2002	0	5,982	27.44	3.64	$21,746
Aug 2002	0	6,373	25.96	3.16	$20,165
Jul 2002	177	6,501	24.58	3.06	$24,255
Jun 2002	1	6,144	23.73	3.34	$20,534
May 2002	0	6,341	24.66	3.58	$22,726
Apr 2002	0	6,383	23.65	3.51	$22,419
Mar 2002	172	6,618	22.00	3.10	$24,318
Feb 2002	0	6,015	18.22	2.38	$14,290
Jan 2002	0	6,712	17.17	2.38	$15,946
Dec 2001	142	6,751	16.93	2.36	$18,366
Nov 2001	0	6,578	18.07	2.41	$15,824
Oct 2001	0	6,896	19.78	2.53	$17,439
Sep 2001	194	6,812	24.26	2.25	$20,042
Aug 2001	0	7,158	24.87	3.05	$21,855
Jul 2001	0	7,287	23.93	3.20	$23,297
Jun 2001	1	6,789	24.56	3.82	$25,987
May 2001	0	7,230	25.52	4.31	$31,142
Apr 2001	192	7,070	24.68	5.34	$42,459
Mar 2001	0	7,328	24.54	5.38	$39,399
Feb 2001	0	6,706	27.75	5.77	$38,674
Jan 2001	219	7,530	27.47	8.40	$69,259
Dec 2000	0	7,304	26.88	9.12	$66,631
Nov 2000	0	7,540	32.21	5.66	$42,661
Oct 2000	180	8,067	31.23	5.15	$47,130
Sep 2000	0	8,460	31.87	5.19	$43,878
Aug 2000	0	7,600	29.64	4.54	$34,510
Jul 2000	151	6,149	28.53	4.09	$29,456
Jun 2000	0	6,105	29.30	4.40	$26,845
May 2000	0	6,354	27.26	3.68	$23,381
Apr 2000	0	6,123	24.51	3.12	$19,079
Mar 2000	0	6,680	28.42	2.86	$19,103
Feb 2000	168	6,401	27.62	2.73	$22,092
Jan 2000	0	6,788	25.27	2.48	$16,838
Dec 1999	0	6,858	24.28	2.42	$16,622
Nov 1999	190	6,900	23.19	2.43	$21,201
Oct 1999	0	5,642	20.98	2.80	$15,819
Sep 1999	0	6,671	21.75	2.62	$17,470
Aug 1999	0	8,168	19.26	2.88	$23,488
Jul 1999	219	5,647	17.89	2.37	$17,315
Jun 1999	0	6,449	15.94	2.36	$15,233
May 1999	0	6,582	15.79	2.32	$15,277
Apr 1999	0	6,716	15.10	2.21	$14,829
Mar 1999	0	7,052	12.47	1.84	$12,964
Feb 1999	0	6,281	9.98	1.82	$11,418
Jan 1999	198	7,227	10.38	1.90	$15,786
Dec 1998	0	6,991	9.20	1.77	$12,397
Nov 1998	0	7,128	10.89	2.19	$15,580
Oct 1998	205	7,478	12.42	1.97	$17,272
Sep 1998	0	7,263	12.59	2.08	$15,126
Aug 1998	0	7,756	11.30	1.91	$14,793
Jul 1998	0	7,931	11.74	2.24	$17,744
Jun 1998	0	7,741	11.24	2.24	$17,319
May 1998	195	8,088	12.62	2.21	$20,306
Apr 1998	0	7,837	13.04	2.51	$19,634
Mar 1998	0	8,022	12.80	2.31	$18,526
Feb 1998	234	7,305	13.95	2.30	$20,059
Jan 1998	0	8,206	14.70	2.15	$17,682
Dec 1997	0	8,290	16.32	2.41	$19,988
Nov 1997	222	8,480	18.19	3.09	$30,227
Oct 1997	0	7,660	19.25	3.15	$24,128
Sep 1997	0	6,878	17.74	2.95	$20,324
Aug 1997	0	7,467	17.86	2.55	$19,076
Jul 1997	0	8,314	17.58	2.25	$18,681
Jun 1997	221	8,282	17.24	2.26	$22,504
May 1997	0	8,888	18.97	2.31	$20,518
Apr 1997	0	9,115	17.88	2.08	$18,985
Mar 1997	253	7,881	18.95	1.94	$20,077
Feb 1997	265	7,796	20.49	2.21	$22,627
Jan 1997	0	7,434	23.48	3.54	$26,314
Dec 1996	0	8,046	23.32	—	$0
Nov 1996	0	8,326	21.97	—	$0
Oct 1996	0	8,835	23.31	—	$0
Sep 1996	0	8,121	22.22	—	$0
Aug 1996	146	7,956	20.26	—	$2,958
Jul 1996	0	7,423	19.55	—	$0
Jun 1996	0	7,773	18.73	—	$0
May 1996	180	7,640	19.43	—	$3,497
Apr 1996	0	7,752	21.51	—	$0
Mar 1996	192	9,650	19.38	—	$3,721
Feb 1996	336	8,113	16.98	—	$5,705
Jan 1996	0	8,967	17.07	—	$0
Dec 1995	0	9,287	17.19	—	$0
Nov 1995	236	8,639	16.00	—	$3,776
Oct 1995	5	9,489	15.43	—	$77
Sep 1995	0	7,942	16.18	—	$0
Aug 1995	199	8,091	15.92	—	$3,168
Jul 1995	0	9,046	15.24	—	$0
Jun 1995	0	8,914	16.41	—	$0
May 1995	0	8,737	17.56	—	$0
Apr 1995	0	8,672	17.73	—	$0
Mar 1995	198	8,988	16.44	—	$3,255
Feb 1995	0	8,422	16.58	—	$0
Jan 1995	224	9,253	15.92	—	$3,566
Dec 1994	226	9,419	15.03	—	$3,397
Nov 1994	0	9,146	15.90	—	$0
Oct 1994	213	8,958	15.58	—	$3,319
Sep 1994	0	8,862	15.29	—	$0
Aug 1994	357	9,310	16.13	—	$5,758
Jul 1994	0	9,534	17.56	—	$0
Jun 1994	0	9,528	17.09	—	$0
May 1994	0	9,994	15.88	—	$0
Apr 1994	389	9,724	14.14	—	$5,500
Mar 1994	0	9,787	12.46	—	$0
Feb 1994	0	8,933	12.50	—	$0
Jan 1994	308	9,911	12.66	—	$3,899
Dec 1993	0	9,988	12.33	—	$0
Nov 1993	0	9,684	14.49	—	$0
Oct 1993	378	9,973	15.85	—	$5,991
Sep 1993	0	9,865	15.03	—	$0
Aug 1993	0	10,230	15.66	—	$0
Jul 1993	0	10,458	15.46	—	$0
Jun 1993	363	10,374	16.79	—	$6,095
May 1993	0	11,143	17.68	—	$0
Apr 1993	0	10,162	18.05	—	$0
Mar 1993	412	10,493	18.14	—	$7,474
Feb 1993	0	9,610	17.90	—	$0
Jan 1993	0	10,407	16.93	—	$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.

Sep 2021 — as filed, then multipliedworked

Condensate           109 bbl  × $ 69.86 =     $7,615
Gas                    0 Mcf  × $  5.35 =         $0

────────────────────────────────────────────────────
Month total                                   $7,615

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/19496 is the state's own key, not one this site invented.