ZWIEFEL UNIT

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

Operated by WILLIAMS, CLAYTON ENERGY, INC. (P-5 924624) in the KURTEN (BUDA) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 22172District 03Field 50424500OilCasinghead gasSave Export

Value, all time

$2.7 M

Sep 1993 – Feb 2015

Value, last 12 filed months

at the published price for each month

Months reported

258

no gaps in the span

Streams

oil, casinghead gas

The KURTEN (BUDA) 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 456 leases and 533 wells, and the rule below applies to all of them.

Discovered

1976-12-02

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 80 acres. The field rule took effect on 2015-03-24.

The Commission's schedule remark for this field reads: “ALLOCATION FORMULA SET TO 100 % ACRES.”

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	121,622 bbl	$2,735,188
Casinghead gas	Production	58,759 Mcf	$824
Total			$2,736,011

58,362 Mcf of this lease's gas, across 39 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 30.8193, -96.3538. A lease has no coordinate of its own — that point is the mean of its wells, and they span 0.0 miles.

30.81931, -96.35380 · 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

11,983 ft

1 wells filed one

Completion to plug

20.9 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 11,983 ft.

Completions filed

Sep 1993

1 of 1 wells

Plug dates filed

Aug 2014

1 of 1 wells

Last completion to plug: a median of 20.9 years across the 1 well that filed both dates, with the middle half between 20.9 years and 20.9 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

1 well


42-04131765	1	11,983 ft	Sep 1993	Aug 2014	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 (258)

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

258 months


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	0	89.39	4.04	$0
Jul 2014	0	0	96.56	4.18	$0
Jun 2014	0	0	98.16	4.74	$0
May 2014	0	0	94.73	4.73	$0
Apr 2014	0	0	95.94	4.81	$0
Mar 2014	0	0	95.89	5.06	$0
Feb 2014	0	0	97.40	6.19	$0
Jan 2014	0	0	90.40	4.86	$0
Dec 2013	0	0	91.82	4.35	$0
Nov 2013	0	0	88.85	3.74	$0
Oct 2013	0	0	97.42	3.78	$0
Sep 2013	0	0	104.11	3.72	$0
Aug 2013	0	0	104.25	3.52	$0
Jul 2013	0	0	102.52	3.72	$0
Jun 2013	0	0	94.40	3.93	$0
May 2013	0	0	94.83	4.15	$0
Apr 2013	0	0	93.96	4.28	$0
Mar 2013	0	0	93.62	3.91	$0
Feb 2013	0	0	91.23	3.42	$0
Jan 2013	0	0	91.60	3.42	$0
Dec 2012	0	0	86.77	3.42	$0
Nov 2012	0	0	86.95	3.62	$0
Oct 2012	0	0	89.38	3.40	$0
Sep 2012	101	0	94.67	2.92	$9,562
Aug 2012	0	0	92.66	2.91	$0
Jul 2012	0	0	85.13	3.02	$0
Jun 2012	0	0	79.82	2.52	$0
May 2012	0	0	91.61	2.49	$0
Apr 2012	0	0	101.65	2.00	$0
Mar 2012	0	0	105.05	2.22	$0
Feb 2012	0	0	101.10	2.57	$0
Jan 2012	0	0	98.09	2.73	$0
Dec 2011	161	0	96.87	3.24	$15,596
Nov 2011	0	0	95.72	3.31	$0
Oct 2011	0	0	84.98	3.65	$0
Sep 2011	0	0	83.62	3.99	$0
Aug 2011	0	0	83.40	4.15	$0
Jul 2011	0	0	94.14	4.52	$0
Jun 2011	0	0	92.90	4.64	$0
May 2011	0	0	98.13	4.40	$0
Apr 2011	0	0	105.96	4.33	$0
Mar 2011	0	0	96.36	4.06	$0
Feb 2011	0	0	85.64	4.18	$0
Jan 2011	0	0	86.50	4.59	$0
Dec 2010	0	0	85.73	4.35	$0
Nov 2010	0	0	80.84	3.80	$0
Oct 2010	0	0	78.10	3.51	$0
Sep 2010	0	0	72.63	3.98	$0
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	168	0	54.74	3.93	$9,196
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	174	0	55.49	6.86	$9,655
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	167	0	131.08	11.39	$21,890
Jun 2008	170	0	131.33	13.03	$22,326
May 2008	171	0	123.17	11.57	$21,062
Apr 2008	179	0	110.31	10.45	$19,745
Mar 2008	0	0	101.90	9.66	$0
Feb 2008	158	0	92.53	8.77	$14,620
Jan 2008	0	0	90.38	8.21	$0
Dec 2007	156	0	88.33	7.30	$13,779
Nov 2007	0	0	91.67	7.29	$0
Oct 2007	175	0	82.85	6.92	$14,499
Sep 2007	167	0	75.84	6.24	$12,665
Aug 2007	360	0	69.06	6.39	$24,862
Jul 2007	180	0	70.90	6.39	$12,762
Jun 2007	182	0	62.00	7.55	$11,284
May 2007	0	0	58.74	7.85	$0
Apr 2007	199	0	59.61	7.81	$11,862
Mar 2007	196	0	56.92	7.30	$11,156
Feb 2007	394	0	55.10	8.22	$21,709
Jan 2007	361	0	50.30	6.73	$18,158
Dec 2006	359	0	56.65	6.92	$20,337
Nov 2006	363	0	54.20	7.62	$19,675
Oct 2006	365	0	54.90	6.01	$20,039
Sep 2006	536	0	60.08	5.04	$32,203
Aug 2006	688	0	68.71	7.34	$47,272
Jul 2006	922	0	69.37	6.34	$63,959
Jun 2006	733	0	66.28	6.38	$48,583
May 2006	901	0	66.01	6.42	$59,475
Apr 2006	1,293	0	64.39	7.36	$83,256
Mar 2006	1,275	0	56.70	7.08	$72,293
Feb 2006	0	0	57.59	7.75	$0
Jan 2006	713	0	60.59	8.93	$43,201
Dec 2005	351	0	54.94	13.42	$19,284
Nov 2005	190	0	54.69	10.59	$10,391
Oct 2005	0	0	58.34	13.80	$0
Sep 2005	0	0	61.45	12.08	$0
Aug 2005	0	0	61.51	9.80	$0
Jul 2005	0	0	55.69	7.84	$0
Jun 2005	0	0	52.33	7.38	$0
May 2005	0	0	45.22	6.65	$0
Apr 2005	182	0	49.20	7.36	$8,954
Mar 2005	190	0	50.37	7.15	$9,570
Feb 2005	0	0	45.22	6.31	$0
Jan 2005	187	0	43.16	6.32	$8,071
Dec 2004	183	0	39.86	6.75	$7,294
Nov 2004	191	0	45.28	6.33	$8,648
Oct 2004	188	0	49.70	6.52	$9,344
Sep 2004	193	0	43.24	5.28	$8,345
Aug 2004	186	0	42.37	5.55	$7,881
Jul 2004	188	0	38.28	6.08	$7,197
Jun 2004	187	0	36.10	6.43	$6,751
May 2004	187	0	37.48	6.49	$7,009
Apr 2004	180	0	34.47	5.86	$6,205
Mar 2004	187	0	34.36	5.53	$6,425
Feb 2004	189	0	32.45	5.51	$6,133
Jan 2004	191	0	32.03	6.30	$6,118
Dec 2003	192	0	30.26	6.30	$5,810
Nov 2003	358	0	28.80	4.60	$10,310
Oct 2003	0	0	28.17	4.76	$0
Sep 2003	190	0	26.31	4.75	$4,999
Aug 2003	186	0	29.76	5.13	$5,535
Jul 2003	335	0	29.41	5.17	$9,852
Jun 2003	0	0	28.56	5.98	$0
May 2003	355	0	26.59	5.97	$9,439
Apr 2003	350	0	26.67	5.41	$9,335
Mar 2003	1	0	31.14	6.10	$31
Feb 2003	348	0	33.48	7.93	$11,651
Jan 2003	361	0	30.31	5.58	$10,942
Dec 2002	2	0	26.91	4.85	$54
Nov 2002	188	0	24.66	4.14	$4,636
Oct 2002	179	0	26.46	4.23	$4,736
Sep 2002	371	0	27.44	3.64	$10,180
Aug 2002	359	0	25.96	3.16	$9,320
Jul 2002	0	0	24.58	3.06	$0
Jun 2002	175	0	23.73	3.34	$4,153
May 2002	361	0	24.66	3.58	$8,902
Apr 2002	169	0	23.65	3.51	$3,997
Mar 2002	338	0	22.00	3.10	$7,436
Feb 2002	181	0	18.22	2.38	$3,298
Jan 2002	363	0	17.17	2.38	$6,233
Dec 2001	181	0	16.93	2.36	$3,064
Nov 2001	534	0	18.07	2.41	$9,649
Oct 2001	0	0	19.78	2.53	$0
Sep 2001	0	0	24.26	2.25	$0
Aug 2001	358	0	24.87	3.05	$8,903
Jul 2001	349	0	23.93	3.20	$8,352
Jun 2001	354	0	24.56	3.82	$8,694
May 2001	173	0	25.52	4.31	$4,415
Apr 2001	699	0	24.68	5.34	$17,251
Mar 2001	0	0	24.54	5.38	$0
Feb 2001	0	0	27.75	5.77	$0
Jan 2001	359	0	27.47	8.40	$9,862
Dec 2000	336	0	26.88	9.12	$9,032
Nov 2000	523	0	32.21	5.66	$16,846
Oct 2000	176	0	31.23	5.15	$5,496
Sep 2000	176	0	31.87	5.19	$5,609
Aug 2000	343	0	29.64	4.54	$10,167
Jul 2000	682	0	28.53	4.09	$19,457
Jun 2000	0	0	29.30	4.40	$0
May 2000	354	0	27.26	3.68	$9,650
Apr 2000	0	0	24.51	3.12	$0
Mar 2000	358	0	28.42	2.86	$10,174
Feb 2000	707	0	27.62	2.73	$19,527
Jan 2000	0	0	25.27	2.48	$0
Dec 1999	358	0	24.28	2.42	$8,692
Nov 1999	354	0	23.19	2.43	$8,209
Oct 1999	173	0	20.98	2.80	$3,630
Sep 1999	505	0	21.75	2.62	$10,984
Aug 1999	705	0	19.26	2.88	$13,578
Jul 1999	180	0	17.89	2.37	$3,220
Jun 1999	359	0	15.94	2.36	$5,722
May 1999	353	0	15.79	2.32	$5,574
Apr 1999	528	0	15.10	2.21	$7,973
Mar 1999	340	0	12.47	1.84	$4,240
Feb 1999	533	0	9.98	1.82	$5,319
Jan 1999	352	0	10.38	1.90	$3,654
Dec 1998	355	0	9.20	1.77	$3,266
Nov 1998	535	0	10.89	2.19	$5,826
Oct 1998	180	0	12.42	1.97	$2,236
Sep 1998	360	0	12.59	2.08	$4,532
Aug 1998	540	0	11.30	1.91	$6,102
Jul 1998	370	0	11.74	2.24	$4,344
Jun 1998	1	0	11.24	2.24	$11
May 1998	368	0	12.62	2.21	$4,644
Apr 1998	364	0	13.04	2.51	$4,747
Mar 1998	365	0	12.80	2.31	$4,672
Feb 1998	187	0	13.95	2.30	$2,609
Jan 1998	512	0	14.70	2.15	$7,526
Dec 1997	365	0	16.32	2.41	$5,957
Nov 1997	551	0	18.19	3.09	$10,023
Oct 1997	183	0	19.25	3.15	$3,523
Sep 1997	365	0	17.74	2.95	$6,475
Aug 1997	373	0	17.86	2.55	$6,662
Jul 1997	182	0	17.58	2.25	$3,200
Jun 1997	373	0	17.24	2.26	$6,431
May 1997	359	0	18.97	2.31	$6,810
Apr 1997	362	141	17.88	2.08	$6,766
Mar 1997	536	130	18.95	1.94	$10,409
Feb 1997	356	126	20.49	2.21	$7,572
Jan 1997	362	0	23.48	3.54	$8,500
Dec 1996	355	270	23.32	—	$8,279
Nov 1996	506	329	21.97	—	$11,117
Oct 1996	519	467	23.31	—	$12,098
Sep 1996	707	436	22.22	—	$15,710
Aug 1996	336	453	20.26	—	$6,807
Jul 1996	704	469	19.55	—	$13,763
Jun 1996	522	508	18.73	—	$9,777
May 1996	526	281	19.43	—	$10,220
Apr 1996	538	520	21.51	—	$11,572
Mar 1996	698	325	19.38	—	$13,527
Feb 1996	876	2	16.98	—	$14,874
Jan 1996	687	81	17.07	—	$11,727
Dec 1995	712	117	17.19	—	$12,239
Nov 1995	715	246	16.00	—	$11,440
Oct 1995	710	557	15.43	—	$10,955
Sep 1995	882	0	16.18	—	$14,271
Aug 1995	539	788	15.92	—	$8,581
Jul 1995	1,059	785	15.24	—	$16,139
Jun 1995	1,082	769	16.41	—	$17,756
May 1995	712	756	17.56	—	$12,503
Apr 1995	1,446	908	17.73	—	$25,638
Mar 1995	739	649	16.44	—	$12,149
Feb 1995	1,078	804	16.58	—	$17,873
Jan 1995	1,439	894	15.92	—	$22,909
Dec 1994	1,069	1,025	15.03	—	$16,067
Nov 1994	1,235	1,078	15.90	—	$19,637
Oct 1994	1,391	1,269	15.58	—	$21,672
Sep 1994	2,083	1,420	15.29	—	$31,849
Aug 1994	1,068	892	16.13	—	$17,227
Jul 1994	2,103	2,051	17.56	—	$36,929
Jun 1994	1,399	1,571	17.09	—	$23,909
May 1994	1,757	2,824	15.88	—	$27,901
Apr 1994	2,779	3,713	14.14	—	$39,295
Mar 1994	1,755	1,479	12.46	—	$21,867
Feb 1994	2,247	2,788	12.50	—	$28,088
Jan 1994	3,819	4,028	12.66	—	$48,349
Dec 1993	4,946	5,916	12.33	—	$60,984
Nov 1993	9,807	7,439	14.49	—	$142,103
Oct 1993	17,157	9,016	15.85	—	$271,938
Sep 1993	8,334	439	15.03	—	$125,260

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 2012 — as filed, then multipliedworked

Oil                  101 bbl  × $ 94.67 =     $9,562
Casinghead gas         0 Mcf  × $  2.92 =         $0

────────────────────────────────────────────────────
Month total                                   $9,562

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/22172 is the state's own key, not one this site invented.