Random Update Of A Re-Entered Madison Well In Stockyard Creek; Drilled Back In 1988; Still Active -- October 12, 2016

This horizontal Madison well has been producing for almost 30 years, has produced over 500,000 bbls of crude oil, and is still active:

• 12537, 157, Petro-Hunt, State of North Dakota K 1, Stockyard Creek, spacing: 160 acres; t12/88; cum 501K 10/16; 

Qualified for stripper well status on August 26, 2009.

This well was spudded October 22, 1988, and completed on December 4, 1988.

It was then re-entered on November 28, 1997, recompleted as a horizontal Madison well on December 24, 1997.

Note the production profile during this period of time. Production jumped from 1,500 bbls/month to 5,000 bbls/month:

MADISON	1-1999	31	3686	3688	125	2346	2139	0
MADISON	12-1998	31	3610	3601	136	2600	2393	0
MADISON	11-1998	30	3620	3558	127	2218	2018	0
MADISON	10-1998	31	3890	3946	133	2958	2751	0
MADISON	9-1998	30	3942	4108	110	3007	2807	0
MADISON	8-1998	31	4313	4144	65	3021	2814	0
MADISON	7-1998	31	4342	4369	80	3098	2891	0
MADISON	6-1998	30	4481	4327	30	3343	3143	0
MADISON	5-1998	31	4870	4997	46	3706	3499	0
MADISON	4-1998	30	5067	4923	124	2678	2478	0
MADISON	3-1998	29	5617	5992	45	2678	2478	0
MADISON	2-1998	28	4978	4825	129	2695	2515	0
MADISON	1-1998	31	6838	6563	130	2643	2436	0
MADISON	12-1997	8	677	509	157	191	138	0
MADISON	11-1997	28	1352	1434	1976	1133	946	0
MADISON	10-1997	31	1506	1550	1983	1992	1785	0
MADISON	9-1997	30	1594	1669	1463	1732	1532	0
MADISON	8-1997	31	1493	1377	1615	1011	804	0
MADISON	7-1997	31	1556	1610	1851	1012	805	0
MADISON	6-1997	30	1497	1450	1412	910	710	0
MADISON	5-1997	31	1546	1570	1741	1035	828	0

Another well in the same section had the same story, re-entered as a horizontal in 1997. Production jumped from 750 bbls/month to 3,000 bbls/month, and remained at 1,500 bbls/month for a number of years:

• 12576, 95, Petro-Hunt, State of North Dakota L 1, Stockyard Creek, t2/89; cum 341K 8/16;

Imagine the number of Madison wells that might be candidates for horizontal re-entries. Ah, the Williston Basin never ceases to surprise me.

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Another Example

This is another example of a vertical Madison well drilled as a vertical and then re-entered as a horizontal in the late 90's. Madison wells in this area are generally spaced on 160 acres (one-quarter section; many have gone to stripper well status). This well is also still active:

• 14716, 160, Rim Operating, Boss 41-17, Stockyard Creek, t10/97; cum 423K 10/16;

Production profile below. See if you can guess when the well was re-entered as a horizontal:

MADISON	7-1999	31	4763	5072	1603	9063	8598	0
MADISON	6-1999	30	4952	4770	1637	8783	8333	0
MADISON	5-1999	31	5570	5389	1742	8981	8516	0
MADISON	4-1999	30	5820	5922	1688	8110	7660	0
MADISON	3-1999	31	6676	6692	1872	8207	7742	0
MADISON	2-1999	28	7030	7020	1774	7428	7008	0
MADISON	1-1999	31	8817	8732	2315	8823	8358	0
MADISON	12-1998	31	13639	13781	2872	11852	11387	0
MADISON	11-1998	30	12331	11760	4304	8981	8531	0
MADISON	10-1998	1	1	221	0	31	16	0
MADISON	9-1998	22	1664	1744	47	1481	1151	0
MADISON	8-1998	31	2096	1952	70	1862	1397	0
MADISON	7-1998	31	2183	2189	75	1967	1502	0
MADISON	6-1998	29	2166	2178	80	1860	1425	0
MADISON	5-1998	31	2326	2436	78	1973	1508	0

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On A Roll

It appears there are many, many examples. I love this one:

This is also a vertical Madison that was re-entered as a horizontal. This well just celebrated its 28th birthday. The production profile is incredible. It's too long to post the entire profile, but it is extraordinarily remarkable. Here is the profile after the well was re-entered as a horizontal:

MADISON	12-1998	31	6497	6421	874	8408	8201	0
MADISON	11-1998	30	6454	6177	975	7220	7020	0
MADISON	10-1998	31	6307	6624	452	6889	6682	0
MADISON	9-1998	30	7731	7597	596	6715	6515	0
MADISON	8-1998	31	8879	8961	639	7955	7748	0
MADISON	7-1998	31	10885	10515	1233	8982	8775	0
MADISON	6-1998	30	9888	10396	1374	8377	8177	0
MADISON	5-1998	31	8341	8787	1914	4175	3968	0
MADISON	4-1998	28	1278	568	0	134	134	0
MADISON	3-1998	14	906	1288	82	711	618	0
MADISON	2-1998	28	1456	1249	77	995	808	0
MADISON	1-1998	31	1755	1822	177	1184	977	0
MADISON	12-1997	31	1782	1717	115	367	160	0
MADISON	11-1997	30	1680	1721	125	882	682	0

The well is still active and producing more than 1,000 bbls/month:

• 12487, 272, Petro-Hunt, Texaco Otto Boss 18-1, Stockyard Creek, t9/88; cum 696K 10/16;