MAREK UNIT

Name: MAREK UNIT lease production and value, Dec 2011 onwards
Creator: Railroad Commission of Texas
License: https://www.rrc.texas.gov/site-policies/

Operated by EOG RESOURCES, INC. (P-5 253162) in the EAGLEVILLE (EAGLE FORD-2) field. Every figure below is a volume the Railroad Commission published, multiplied by a monthly price you can check.

Oil lease lease 9878District 02Field 27135750OilCasinghead gasSave

Value, all time

$275.4 M

Dec 2011 – May 2026

Value, last 12 filed months

$5.2 M

at the published price for each month

Months reported

174

no gaps in the span

Streams

oil, casinghead gas

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	3,841,846 bbl	$259,221,424
Casinghead gas	Production	5,049,896 Mcf	$16,156,150
Total			$275,377,574

Wells on this lease (11)

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 29.0651, -97.7655. A lease has no coordinate of its own — that point is the mean of its wells, and they span 1.3 miles.

29.06273, -97.76257 · 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

18.2%

2 of 11 wells

With a plug date

18.2%

2 of 11 wells

Median depth

10,706 ft

11 wells filed one

Completion to plug

8.9 years

median over 2 wells

What the state filed about each well

On the RRC proration schedule

218.2%

A plug date is filed

218.2%

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

218.2%

NeitherNo plug date, and not on the schedule.

981.8%

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

10k

12k

15k

20k+

Total depth in feet, 11 of 11 wells. Median 10,706 ft, with the middle half between 10,681 and 11,031 ft; the shallowest is 10,646 ft and the deepest 11,230 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

10s

Last completion by decade, 11 of 11 wells, Dec 2011 – Mar 2018. This is the LAST completion filed on each wellbore, not the first — a well recompleted in 2019 counts once, in the 2010s.

Completions filed

Dec 2011 – Mar 2018

11 of 11 wells

Plug dates filed

Dec 2023

2 of 11 wells; 9 filed none

Last completion to plug: a median of 8.9 years across the 2 wells that filed both dates, with the middle half between 7.3 years and 10.4 years. The gap is the distance between two filed dates. It is not a statement of how long the well produced.

11 wells


42-25535532	11H	10,706 ft	Mar 2018	Dec 2023	Yes
42-25535531	9H	10,914 ft	Mar 2018	—	—
42-25533974	10H	10,657 ft	Jan 2015	—	—
42-25533975	7H	10,683 ft	Jan 2015	—	—
42-25534036	8H	11,158 ft	Dec 2014	—	—
42-25533512	6H	11,230 ft	Apr 2014	—	—
42-25532907	5H	10,678 ft	Feb 2013	—	—
42-25532104	2H	10,700 ft	Jan 2012	—	—
42-25532105	4H	10,646 ft	Dec 2011	Dec 2023	Yes
42-25532103	1H	11,147 ft	Dec 2011	—	—
42-25532124	3H	10,743 ft	Dec 2011	—	—

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 (174)

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

174 months


May 2026	5,219	11,425	106.41	3.05	$590,153
Apr 2026	5,419	10,867	98.93	2.87	$567,287
Mar 2026	5,134	11,985	89.75	3.15	$498,523
Feb 2026	4,860	10,762	63.50	3.75	$348,971
Jan 2026	5,645	12,068	59.13	8.00	$430,308
Dec 2025	5,994	12,381	56.66	4.41	$394,262
Nov 2025	5,592	12,085	58.59	3.93	$375,086
Oct 2025	6,065	11,700	59.38	3.30	$398,806
Sep 2025	5,399	10,471	62.74	3.08	$370,952
Aug 2025	5,614	10,986	63.93	3.01	$392,023
Jul 2025	5,513	11,094	66.74	3.32	$404,716
Jun 2025	5,885	12,184	66.48	3.13	$429,355
May 2025	6,615	12,537	60.55	3.23	$441,062
Apr 2025	6,875	12,835	62.36	3.54	$474,201
Mar 2025	8,918	14,443	67.70	4.27	$665,396
Feb 2025	573	1,032	70.88	4.34	$45,094
Jan 2025	6,975	15,462	74.32	4.28	$584,539
Dec 2024	5,882	14,245	68.99	3.12	$450,263
Nov 2024	7,024	14,284	69.05	2.20	$516,410
Oct 2024	8,122	11,473	71.37	2.28	$605,842
Sep 2024	6,086	8,858	69.61	2.36	$444,590
Aug 2024	7,310	9,385	75.63	2.06	$572,222
Jul 2024	4,842	7,380	79.93	2.15	$402,863
Jun 2024	3,853	7,381	78.08	2.63	$320,284
May 2024	6,036	8,287	78.81	2.20	$493,916
Apr 2024	6,051	10,186	84.45	1.66	$527,908
Mar 2024	6,901	13,282	80.30	1.55	$574,673
Feb 2024	7,111	13,015	76.09	1.78	$564,290
Jan 2024	7,500	12,536	73.02	3.30	$588,989
Dec 2023	7,911	12,958	71.26	2.61	$597,568
Nov 2023	7,150	12,500	77.89	2.81	$592,008
Oct 2023	6,810	11,143	85.44	3.09	$616,248
Sep 2023	6,369	11,147	89.04	2.74	$597,583
Aug 2023	7,137	12,327	80.52	2.67	$607,620
Jul 2023	7,008	13,000	74.85	2.64	$558,892
Jun 2023	7,122	13,334	68.96	2.26	$521,248
May 2023	7,477	14,301	70.62	2.23	$559,880
Apr 2023	7,565	13,290	78.12	2.24	$620,718
Mar 2023	7,144	14,915	72.85	2.39	$556,134
Feb 2023	7,251	14,066	75.11	2.47	$579,305
Jan 2023	8,199	16,816	76.53	3.39	$684,437
Dec 2022	8,478	16,844	76.41	5.73	$744,305
Nov 2022	7,912	17,600	85.00	5.65	$771,893
Oct 2022	8,286	18,884	87.18	5.86	$833,105
Sep 2022	8,192	19,065	84.88	8.16	$850,978
Aug 2022	8,645	18,592	94.52	9.13	$986,818
Jul 2022	8,467	19,151	101.58	7.54	$1,004,516
Jun 2022	9,001	18,859	115.09	7.98	$1,186,367
May 2022	9,672	21,492	109.37	8.43	$1,239,070
Apr 2022	9,196	19,176	104.22	6.84	$1,089,525
Mar 2022	10,366	19,349	108.88	5.08	$1,226,873
Feb 2022	8,051	14,596	91.05	4.86	$803,963
Jan 2022	10,253	18,289	81.84	4.54	$922,095
Dec 2021	11,857	16,803	71.32	3.90	$911,158
Nov 2021	10,338	15,170	77.43	5.24	$879,914
Oct 2021	10,037	12,115	79.79	5.71	$870,076
Sep 2021	9,983	14,256	69.86	5.35	$773,695
Aug 2021	10,057	15,278	66.02	4.22	$728,445
Jul 2021	9,963	14,776	70.78	3.98	$764,020
Jun 2021	10,338	16,281	69.49	3.38	$773,427
May 2021	11,343	17,252	63.48	3.02	$772,114
Apr 2021	10,921	16,212	60.36	2.76	$703,911
Mar 2021	12,047	15,775	61.30	2.72	$781,341
Feb 2021	9,842	12,693	57.80	5.55	$639,288
Jan 2021	12,480	16,568	50.41	2.81	$675,677
Dec 2020	11,833	12,691	44.64	2.68	$562,179
Nov 2020	12,358	15,816	38.77	2.71	$521,927
Oct 2020	12,252	15,223	36.97	2.48	$490,686
Sep 2020	11,593	17,746	37.09	1.99	$465,317
Aug 2020	12,256	19,153	39.98	2.39	$535,677
Jul 2020	13,766	22,203	38.37	1.83	$568,725
Jun 2020	14,188	19,222	34.90	1.69	$527,652
May 2020	5,932	9,953	16.92	1.81	$118,432
Apr 2020	12,754	19,292	14.75	1.80	$222,932
Mar 2020	14,779	25,179	30.34	1.86	$495,133
Feb 2020	14,386	22,172	49.88	1.98	$761,489
Jan 2020	15,002	24,058	57.25	2.09	$909,260
Dec 2019	14,274	22,358	59.01	2.30	$893,830
Nov 2019	16,170	26,764	55.30	2.75	$967,821
Oct 2019	17,579	29,444	53.47	2.42	$1,011,161
Sep 2019	16,737	29,558	55.05	2.66	$999,916
Aug 2019	18,402	33,747	53.11	2.30	$1,055,095
Jul 2019	20,353	35,691	56.27	2.46	$1,233,065
Jun 2019	20,532	30,492	52.78	2.49	$1,159,641
May 2019	19,855	23,041	58.48	2.74	$1,224,260
Apr 2019	10,266	11,959	62.63	2.75	$675,855
Mar 2019	20,394	23,815	56.80	3.06	$1,231,303
Feb 2019	16,269	12,011	50.85	2.79	$860,816
Jan 2019	27,023	32,609	46.03	3.23	$1,349,136
Dec 2018	28,188	35,188	46.59	4.19	$1,460,556
Nov 2018	29,675	37,971	52.93	4.24	$1,731,590
Oct 2018	33,688	45,305	61.44	3.40	$2,223,741
Sep 2018	37,538	49,734	59.54	3.11	$2,389,586
Aug 2018	41,242	48,143	59.40	3.07	$2,597,408
Jul 2018	50,476	59,631	65.14	2.93	$3,462,838
Jun 2018	56,357	60,158	60.18	3.08	$3,576,666
May 2018	56,611	50,519	65.38	2.90	$3,847,773
Apr 2018	129,846	109,086	63.84	2.90	$8,605,805
Mar 2018	38,314	33,957	61.22	2.79	$2,440,216
Feb 2018	12,263	19,424	61.78	2.77	$811,337
Jan 2018	15,165	21,237	62.87	4.01	$1,038,569
Dec 2017	15,462	28,888	57.27	2.92	$969,906
Nov 2017	16,194	28,388	55.42	3.12	$985,995
Oct 2017	15,622	22,318	49.29	2.98	$836,598
Sep 2017	14,575	22,898	47.52	3.09	$763,297
Aug 2017	16,629	28,098	45.37	3.00	$838,875
Jul 2017	18,091	30,474	43.87	3.09	$887,734
Jun 2017	18,013	31,405	42.49	3.09	$862,328
May 2017	19,479	32,154	45.37	3.26	$988,694
Apr 2017	20,083	32,043	47.93	3.21	$1,065,487
Mar 2017	18,573	25,592	46.77	2.98	$945,018
Feb 2017	18,334	31,013	50.45	2.95	$1,016,519
Jan 2017	21,651	46,808	49.41	3.42	$1,229,803
Dec 2016	22,294	42,934	48.76	3.72	$1,246,891
Nov 2016	22,002	43,453	42.49	2.64	$1,049,770
Oct 2016	24,013	46,197	46.19	3.09	$1,251,921
Sep 2016	24,011	52,175	41.55	3.10	$1,159,432
Aug 2016	27,412	60,454	41.44	2.92	$1,312,741
Jul 2016	31,550	57,480	41.62	2.92	$1,481,202
Jun 2016	27,530	66,739	45.35	2.69	$1,427,735
May 2016	29,063	41,682	42.52	1.99	$1,318,749
Apr 2016	29,350	41,271	36.56	1.99	$1,155,208
Mar 2016	31,591	43,608	33.01	1.79	$1,121,052
Feb 2016	30,703	40,088	26.47	2.06	$895,435
Jan 2016	31,860	40,386	27.35	2.36	$966,858
Dec 2015	35,363	55,100	32.36	2.00	$1,254,624
Nov 2015	38,431	54,900	38.79	2.17	$1,609,725
Oct 2015	39,169	54,869	43.55	2.43	$1,838,954
Sep 2015	43,247	62,134	42.99	2.76	$2,030,580
Aug 2015	43,453	53,982	40.16	2.87	$1,900,135
Jul 2015	47,734	55,178	48.15	2.95	$2,460,896
Jun 2015	53,796	61,925	56.15	2.88	$3,199,167
May 2015	64,058	70,297	55.21	2.96	$3,744,401
Apr 2015	73,064	73,339	49.82	2.71	$3,838,546
Mar 2015	92,179	89,620	42.89	2.93	$4,216,566
Feb 2015	91,797	83,070	44.66	2.98	$4,346,886
Jan 2015	1,398	728	43.43	3.10	$62,972
Dec 2014	22,529	24,248	54.69	3.59	$1,319,194
Nov 2014	27,058	27,651	70.46	4.25	$2,024,074
Oct 2014	22,777	22,756	78.30	3.90	$1,872,209
Sep 2014	14,386	14,165	86.16	4.05	$1,296,801
Aug 2014	25,061	25,180	89.39	4.04	$2,341,807
Jul 2014	31,307	32,785	96.56	4.18	$3,160,032
Jun 2014	40,663	40,592	98.16	4.74	$4,183,760
May 2014	31,724	30,590	94.73	4.73	$3,149,800
Apr 2014	61	0	95.94	4.81	$5,852
Mar 2014	14,134	14,309	95.89	5.06	$1,427,667
Feb 2014	19,389	21,568	97.40	6.19	$2,022,038
Jan 2014	23,142	25,763	90.40	4.86	$2,217,264
Dec 2013	24,044	27,847	91.82	4.35	$2,328,979
Nov 2013	23,826	24,161	88.85	3.74	$2,207,261
Oct 2013	24,955	23,290	97.42	3.78	$2,519,137
Sep 2013	28,484	34,889	104.11	3.72	$3,095,177
Aug 2013	29,570	32,931	104.25	3.52	$3,198,676
Jul 2013	25,848	31,891	102.52	3.72	$2,768,499
Jun 2013	29,328	35,168	94.40	3.93	$2,906,893
May 2013	35,725	39,120	94.83	4.15	$3,550,114
Apr 2013	46,261	53,874	93.96	4.28	$4,577,404
Mar 2013	55,027	54,050	93.62	3.91	$5,363,118
Feb 2013	17,742	17,034	91.23	3.42	$1,676,857
Jan 2013	24,194	28,038	91.60	3.42	$2,312,058
Dec 2012	26,570	32,611	86.77	3.42	$2,417,014
Nov 2012	28,376	33,609	86.95	3.62	$2,589,124
Oct 2012	31,564	40,179	89.38	3.40	$2,957,786
Sep 2012	31,428	39,327	94.67	2.92	$3,090,061
Aug 2012	34,534	43,334	92.66	2.91	$3,325,943
Jul 2012	41,368	53,018	85.13	3.02	$3,681,815
Jun 2012	45,307	54,958	79.82	2.52	$3,754,846
May 2012	41,184	48,031	91.61	2.49	$3,892,383
Apr 2012	65,448	76,803	101.65	2.00	$6,806,149
Mar 2012	54,206	59,195	105.05	2.22	$5,825,876
Feb 2012	88,786	95,920	101.10	2.57	$9,222,802
Jan 2012	145,924	138,725	98.09	2.73	$14,692,970
Dec 2011	7,945	6,546	96.87	3.24	$790,839

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.

May 2026 — as filed, then multipliedworked

Oil                5,219 bbl  × $106.41 =   $555,354
Casinghead gas    11,425 Mcf  × $  3.05 =    $34,799

────────────────────────────────────────────────────
Month total                                 $590,153

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. 02/O/9878 is the state's own key, not one this site invented.