Mitigation Proposal For Pressure Pulses On Existing Wells Due To Completion Of Neighboring Wells -- November 3, 2016

From a sundry report dated/received February 22, 2016:

• 17222, 1,769, EOG, Austin 18-21H, Parshall, t9/08; cum 887K 9/16; a short lateral

ISSUE: EOG resources is currently executing a downspacing and infill drilling program. During this process the new infill wells are being hydraulically fractured offset to existing/producing wells.

The existing wells in close proximity to the new infill wells are shut in during the drilling and completion process.

Pressure pulses have been noted in the existing shut-in wells during this process. Due to the pressure pulses, sand from the completions in the original wells can become dislodged and enter the wellbore. When sand enters the existing wellbore it can damage pumping equipment and/or plug the wellbore. When this occurs wellbore intervention is required to replace the damaged equipment and may also require the wellbore to be cleaned out, both operations are costly and slow the process of returning offset wells to production.

PROPOSAL: As a mitigation measure, EOG is requesting approval to fill the existing wellbore with produced water from nearby producing wells. The fluid would increase the hydrostatic pressure in the existing well and assist in counter-acting the pressure pulses and sand influxes impacting the well from the drilling and completion process of the infill wells.

The fluid will be pumped at a very low surface pressure with a fluid pump. Pumping pressures are planned below 500 psi. At or before reaching 500 psi, pumping would cease, keeping the pressure below fracture pressure.

Produced water will be transported by truck or pipeline for the process. 

Production profile for this well (#17222) for past year or so:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	9-2016	30	5423	5422	1448	2247	1605	458
BAKKEN	8-2016	31	5165	5225	2028	1971	1425	356
BAKKEN	7-2016	31	5012	4947	2778	2022	1281	551
BAKKEN	6-2016	14	1764	1685	1849	860	626	152
BAKKEN	5-2016	0	0	0	0	0	0	0
BAKKEN	4-2016	0	0	0	0	0	0	0
BAKKEN	3-2016	0	0	0	0	0	0	0
BAKKEN	2-2016	0	0	37	0	0	0	0
BAKKEN	1-2016	20	1690	1713	104	2263	2047	95
BAKKEN	12-2015	31	2704	2706	92	3337	2370	777
BAKKEN	11-2015	30	2357	2348	69	2741	513	2050
BAKKEN	10-2015	31	2129	2136	66	2548	1167	1197

#31825 -- API 33-061-03799 -- no frack data yet at FracFocus.

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• 20699, 344, Hunt, Karbowski 2-22H 2, Parshall, short lateral, t9/11; cum 178K 9/16;

Production profile for #20699; no explanation for bump-up in production in late 2016:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	9-2016	30	3680	3671	575	2135	1702	82
BAKKEN	8-2016	31	4136	4138	1062	2066	1430	236
BAKKEN	7-2016	31	4575	4575	1522	2280	1621	299
BAKKEN	6-2016	30	3284	3336	2692	1381	1088	17
BAKKEN	5-2016	14	735	712	1959	362	131	47
BAKKEN	4-2016	19	342	220	484	359	67	0
BAKKEN	3-2016	3	33	0	76	52	6	0
BAKKEN	2-2016	22	946	1045	93	1725	1502	0
BAKKEN	1-2016	31	1254	1194	71	2472	2147	0
BAKKEN	12-2015	31	1104	1156	45	1917	1324	313
BAKKEN	11-2015	30	954	1132	65	2029	1144	585
BAKKEN	10-2015	31	1316	1148	56	2754	2247	69
BAKKEN	9-2015	30	1449	1476	56	2257	1569	322
BAKKEN	8-2015	29	893	865	119	2022	1455	343
BAKKEN	7-2015	31	924	853	67	1997	918	796