0645200913020

Well Details

Well ID: 0645200913020	Loading map... {"type":"SATELLITE","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"mappingservice":"googlemaps3","width":"100%","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"wmsoverlay":false,"copycoords":false,"static":false,"zoom":14,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"markercluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[],"searchmarkers":"","enablefullscreen":false,"scrollwheelzoom":false,"locations":[{"text":"","title":"","link":"","lat":54.508601,"lon":-116.947194,"icon":""}]}
Location: 02/13-09-064-20W5/0
Location Alias: 02/13-09-64-20 W5M
Location Alias 2: 02/13-09-064-20 W5/00
Country: Canada
Province: Alberta
Township: 064
Meridian: 5
Range: 20
Section: 09
County/Municipality: Municipal District of Greenview No. 16
Well Name: SCL HZ FC225D KAYBOB 13-9-64-20
Operator Name: Shell Canada Limited
License Number: 0480131
License Date: 2016-08-19
License Status: Amended
Spud Date: 2017-09-04
Final Drill Date: 2017-10-13
Well Total Depth: 5654.00 m
Surface Hole Latitude: 54.508601
Surface Hole Longitude: -116.947194

For data sources see^[1]^[2]

Well History

Date	Event
2016-08-19	Obtained License
2017-09-05	Direction Drilling Operation Performed - Deviate
2017-09-05	Surface Casing Operation Performed
2017-09-21	Intermediate Casing Operation Performed
2017-10-10	Direction Drilling Operation Performed - Horizontal
2017-10-10	Production Casing Operation Performed
2017-10-13	Finished Drilling
2017-10-13	Well Mode changed to Drilled and Cased
2017-10-14	Well Log Performed
2017-10-15	Rig Released
2017-12-01	Perforation Treatment Performed - Jet Perforation
2017-12-03	Perforation Treatment Performed - Jet Perforation
2017-12-06	Perforation Treatment Performed - Fractured
2017-12-06	Perforation Treatment Performed - Jet Perforation
2017-12-07	Perforation Treatment Performed - Fractured
2017-12-07	Perforation Treatment Performed - Jet Perforation
2017-12-08	Perforation Treatment Performed - Fractured
2017-12-08	Perforation Treatment Performed - Jet Perforation
2017-12-09	Perforation Treatment Performed - Fractured
2017-12-09	Perforation Treatment Performed - Jet Perforation
2017-12-10	Perforation Treatment Performed - Fractured
2017-12-10	Perforation Treatment Performed - Jet Perforation
2017-12-11	Perforation Treatment Performed - Fractured
2017-12-11	Perforation Treatment Performed - Jet Perforation
2017-12-12	Perforation Treatment Performed - Fractured
2017-12-12	Perforation Treatment Performed - Jet Perforation
2017-12-13	Perforation Treatment Performed - Fractured
2017-12-13	Perforation Treatment Performed - Jet Perforation
2017-12-14	Perforation Treatment Performed - Fractured
2017-12-14	Perforation Treatment Performed - Jet Perforation
2017-12-15	Perforation Treatment Performed - Fractured
2017-12-15	Perforation Treatment Performed - Jet Perforation
2017-12-16	Perforation Treatment Performed - Fractured
2017-12-16	Perforation Treatment Performed - Jet Perforation
2017-12-17	Perforation Treatment Performed - Fractured
2017-12-17	Perforation Treatment Performed - Jet Perforation
2017-12-18	Perforation Treatment Performed - Fractured
2017-12-18	Perforation Treatment Performed - Jet Perforation
2017-12-19	Perforation Treatment Performed - Fractured
2017-12-19	Perforation Treatment Performed - Jet Perforation
2017-12-20	Perforation Treatment Performed - Fractured
2017-12-20	Perforation Treatment Performed - Jet Perforation
2017-12-21	Perforation Treatment Performed - Fractured
2018-02-03	Well Fluid changed to Shale Gas Only
2018-02-03	Well Mode changed to Testing
2018-03-14	Well Began Production
2018-03-14	Well Fluid changed to Shale Gas and Other
2018-03-14	Well Mode changed to Flowing
2018-10-12	Well Fluid changed to Shale Gas Only
2018-10-12	Well Mode changed to Pumping

For data sources see^[3]

Spud Table

Spud Date	Contractor	Rig Number	New Projected Depth (m)	Activity Type
2017-09-04	Ensign Drilling Inc.	770	N/A	Drill To LD

For data sources see^[4]

Directional Drilling

Start Date	Depth (m)	Reason
2017-09-05	610.60	Deviate (5 - 79 degrees)
2017-10-10	3236.00	Horizontal

For data sources see^[5]

Perforation Treatments

Perforation Date	Perforation Type	Interval Top (m)	Interval Base (m)	Number of Shots
2017-12-01	Perforation	5605.80	5606.50	12
2017-12-06	Perforation	5500.00	5500.30	12
2017-12-13	Perforation	4394.00	4394.30	12
2017-12-13	Perforation	4381.00	4381.30	12
2017-12-13	Perforation	4368.00	4368.30	12
2017-12-13	Perforation	4356.00	4356.30	12
2017-12-13	Perforation	4343.00	4343.30	12
2017-12-13	Perforation	4330.00	4330.30	12
2017-12-14	Fracture	4330.00	4394.30	0
2017-12-14	Perforation	4313.00	4313.30	12
2017-12-14	Perforation	4300.00	4300.30	12
2017-12-14	Perforation	4288.00	4288.30	12
2017-12-06	Perforation	5488.00	5488.30	12
2017-12-14	Perforation	4275.00	4275.30	12
2017-12-14	Perforation	4262.00	4262.30	12
2017-12-14	Perforation	4250.00	4250.30	12
2017-12-14	Fracture	4250.00	4313.30	0
2017-12-14	Perforation	4232.00	4232.30	12
2017-12-14	Perforation	4219.00	4219.30	12
2017-12-14	Perforation	4207.00	4207.30	12
2017-12-14	Perforation	4194.00	4194.30	12
2017-12-14	Perforation	4181.00	4181.30	12
2017-12-14	Perforation	4169.00	4169.30	12
2017-12-06	Perforation	5475.00	5475.30	12
2017-12-15	Fracture	4169.00	4232.30	0
2017-12-15	Perforation	4151.00	4151.30	12
2017-12-15	Perforation	4139.00	4139.30	12
2017-12-15	Perforation	4126.00	4126.30	12
2017-12-15	Perforation	4113.00	4113.30	12
2017-12-15	Perforation	4101.00	4101.30	12
2017-12-15	Perforation	4088.00	4088.30	12
2017-12-15	Fracture	4088.00	4151.30	0
2017-12-15	Perforation	4070.00	4070.30	12
2017-12-15	Perforation	4058.00	4058.30	12
2017-12-06	Perforation	5462.00	5462.30	12
2017-12-15	Perforation	4045.00	4045.30	12
2017-12-15	Perforation	4032.00	4032.30	12
2017-12-15	Perforation	4020.00	4020.30	12
2017-12-15	Perforation	4007.00	4007.30	12
2017-12-16	Fracture	4007.00	4070.30	0
2017-12-16	Perforation	3989.00	3989.30	12
2017-12-16	Perforation	3977.00	3977.30	12
2017-12-16	Perforation	3964.00	3964.30	12
2017-12-16	Perforation	3951.00	3951.30	12
2017-12-16	Perforation	3939.00	3939.30	12
2017-12-06	Fracture	5462.00	5526.30	0
2017-12-16	Perforation	3926.00	3926.30	12
2017-12-16	Fracture	3926.00	3989.30	0
2017-12-16	Perforation	3909.00	3909.30	12
2017-12-16	Perforation	3896.00	3896.30	12
2017-12-16	Perforation	3883.00	3883.30	12
2017-12-16	Perforation	3871.00	3871.30	12
2017-12-16	Perforation	3858.00	3858.30	12
2017-12-16	Perforation	3845.00	3845.30	12
2017-12-17	Fracture	3845.00	3909.30	0
2017-12-17	Perforation	3828.00	3828.30	12
2017-12-06	Perforation	5445.00	5445.30	12
2017-12-17	Perforation	3815.00	3815.30	12
2017-12-17	Perforation	3802.00	3802.30	12
2017-12-17	Perforation	3790.00	3790.30	12
2017-12-17	Perforation	3777.00	3777.30	12
2017-12-17	Perforation	3764.00	3764.30	12
2017-12-17	Fracture	3764.00	3828.30	0
2017-12-17	Perforation	3747.00	3747.30	12
2017-12-17	Perforation	3734.00	3734.30	12
2017-12-17	Perforation	3722.00	3722.30	12
2017-12-17	Perforation	3709.00	3709.30	12
2017-12-06	Perforation	5432.00	5432.30	12
2017-12-17	Perforation	3696.00	3696.30	12
2017-12-17	Perforation	3684.00	3684.30	12
2017-12-18	Fracture	3684.00	3747.30	0
2017-12-18	Perforation	3666.00	3666.30	12
2017-12-18	Perforation	3653.00	3653.30	12
2017-12-18	Perforation	3641.00	3641.30	12
2017-12-18	Perforation	3628.00	3628.30	12
2017-12-18	Perforation	3615.00	3615.30	12
2017-12-18	Perforation	3603.00	3603.30	12
2017-12-18	Fracture	3603.00	3666.30	0
2017-12-06	Perforation	5419.00	5419.30	12
2017-12-18	Perforation	3585.00	3585.30	12
2017-12-18	Perforation	3573.00	3573.30	12
2017-12-18	Perforation	3560.00	3560.30	12
2017-12-18	Perforation	3547.00	3547.30	12
2017-12-18	Perforation	3535.00	3535.30	12
2017-12-18	Perforation	3522.00	3522.30	12
2017-12-19	Fracture	3522.00	3585.30	0
2017-12-19	Perforation	3504.00	3504.30	12
2017-12-19	Perforation	3492.00	3492.30	12
2017-12-19	Perforation	3479.00	3479.30	12
2017-12-06	Perforation	5407.00	5407.30	12
2017-12-19	Perforation	3466.00	3466.30	12
2017-12-19	Perforation	3454.00	3454.30	12
2017-12-19	Perforation	3441.00	3441.30	12
2017-12-19	Fracture	3441.00	3504.30	0
2017-12-19	Perforation	3424.00	3424.30	12
2017-12-19	Perforation	3411.00	3411.30	12
2017-12-19	Perforation	3398.00	3398.30	12
2017-12-19	Perforation	3386.00	3386.30	12
2017-12-19	Perforation	3373.00	3373.30	12
2017-12-19	Perforation	3360.00	3360.30	12
2017-12-06	Perforation	5394.00	5394.30	12
2017-12-20	Fracture	3360.00	3424.30	0
2017-12-20	Perforation	3343.00	3343.30	12
2017-12-20	Perforation	3330.00	3330.30	12
2017-12-20	Perforation	3317.00	3317.30	12
2017-12-20	Perforation	3305.00	3305.30	12
2017-12-20	Perforation	3292.00	3292.30	12
2017-12-20	Perforation	3279.00	3279.30	12
2017-12-20	Fracture	3279.00	3343.30	0
2017-12-20	Perforation	3262.00	3262.30	12
2017-12-20	Perforation	3249.00	3249.30	12
2017-12-03	Perforation	5581.00	5581.30	12
2017-12-06	Perforation	5381.00	5381.30	12
2017-12-20	Perforation	3236.00	3236.30	12
2017-12-20	Perforation	3224.00	3224.30	12
2017-12-20	Perforation	3211.00	3211.30	12
2017-12-20	Perforation	3198.00	3198.30	12
2017-12-21	Fracture	3198.00	3262.30	0
2017-12-06	Fracture	5381.00	5445.30	0
2017-12-07	Perforation	5364.00	5364.30	12
2017-12-07	Perforation	5351.00	5351.30	12
2017-12-07	Perforation	5339.00	5339.30	12
2017-12-07	Perforation	5326.00	5326.30	12
2017-12-07	Perforation	5313.00	5313.30	12
2017-12-07	Perforation	5301.00	5301.30	12
2017-12-07	Fracture	5301.00	5364.30	0
2017-12-08	Perforation	5283.00	5283.30	12
2017-12-03	Perforation	5572.00	5572.30	12
2017-12-08	Perforation	5270.00	5270.30	12
2017-12-08	Perforation	5258.00	5258.30	12
2017-12-08	Perforation	5245.00	5245.30	12
2017-12-08	Perforation	5232.00	5232.30	12
2017-12-08	Perforation	5220.00	5220.30	12
2017-12-08	Fracture	5220.00	5283.30	0
2017-12-09	Fracture	5139.00	5202.30	0
2017-12-09	Perforation	5121.00	5121.30	12
2017-12-09	Perforation	5109.00	5109.30	12
2017-12-09	Perforation	5096.00	5096.30	12
2017-12-03	Perforation	5562.00	5562.30	12
2017-12-09	Perforation	5083.00	5083.30	12
2017-12-09	Perforation	5071.00	5071.30	12
2017-12-09	Perforation	5058.00	5058.30	12
2017-12-09	Fracture	5058.00	5121.30	0
2017-12-09	Perforation	5041.00	5041.30	12
2017-12-09	Perforation	5028.00	5028.30	12
2017-12-09	Perforation	5015.00	5015.30	12
2017-12-09	Perforation	5003.00	5003.30	12
2017-12-09	Perforation	4990.00	4990.30	12
2017-12-09	Perforation	4977.00	4977.30	12
2017-12-03	Perforation	5553.00	5553.30	12
2017-12-10	Fracture	4977.00	5041.30	0
2017-12-10	Perforation	4960.00	4960.30	12
2017-12-10	Perforation	4947.00	4947.30	12
2017-12-10	Perforation	4934.00	4934.30	12
2017-12-10	Perforation	4922.00	4922.30	12
2017-12-10	Perforation	4909.00	4909.30	12
2017-12-10	Perforation	4896.00	4896.30	12
2017-12-10	Fracture	4896.00	4960.30	0
2017-12-10	Perforation	4879.00	4879.30	12
2017-12-10	Perforation	4866.00	4866.30	12
2017-12-03	Perforation	5543.00	5543.30	12
2017-12-10	Perforation	4854.00	4854.30	12
2017-12-10	Perforation	4841.00	4841.30	12
2017-12-10	Perforation	4828.00	4828.30	12
2017-12-10	Perforation	4815.00	4815.30	12
2017-12-11	Fracture	4815.00	4879.30	0
2017-12-11	Perforation	4798.00	4798.30	12
2017-12-11	Perforation	4785.00	4785.30	12
2017-12-11	Perforation	4773.00	4773.30	12
2017-12-11	Perforation	4760.00	4760.30	12
2017-12-11	Perforation	4747.00	4747.30	12
2017-12-06	Fracture	5543.00	5606.50	0
2017-12-11	Perforation	4735.00	4735.30	12
2017-12-11	Fracture	4735.00	4798.30	0
2017-12-12	Perforation	4717.00	4717.30	12
2017-12-12	Perforation	4704.00	4704.30	12
2017-12-12	Perforation	4692.00	4692.30	12
2017-12-12	Perforation	4679.00	4679.30	12
2017-12-12	Perforation	4666.00	4666.30	12
2017-12-12	Perforation	4654.00	4654.30	12
2017-12-12	Fracture	4654.00	4717.30	0
2017-12-12	Perforation	4636.00	4636.30	12
2017-12-06	Perforation	5526.00	5526.30	12
2017-12-12	Perforation	4624.00	4624.30	12
2017-12-12	Perforation	4611.00	4611.30	12
2017-12-12	Perforation	4598.00	4598.30	12
2017-12-12	Perforation	4586.00	4586.30	12
2017-12-12	Perforation	4573.00	4573.30	12
2017-12-12	Fracture	4573.00	4636.30	0
2017-12-12	Perforation	4555.00	4555.30	12
2017-12-12	Perforation	4543.00	4543.30	12
2017-12-12	Perforation	4530.00	4530.30	12
2017-12-12	Perforation	4517.00	4517.30	12
2017-12-06	Perforation	5513.00	5513.30	12
2017-12-12	Perforation	4505.00	4505.30	12
2017-12-12	Perforation	4492.00	4492.30	12
2017-12-13	Fracture	4492.00	4555.30	0
2017-12-13	Perforation	4475.00	4475.30	12
2017-12-13	Perforation	4462.00	4462.30	12
2017-12-13	Perforation	4449.00	4449.30	12
2017-12-13	Perforation	4437.00	4437.30	12
2017-12-13	Perforation	4424.00	4424.30	12
2017-12-13	Perforation	4411.00	4411.30	12
2017-12-13	Fracture	4411.00	4475.30	0

For data sources see^[6]

Fracking Activities

Fracking Jobs

Job Number	Job Start Date	Job End Date	True Vertical Depth (ft)	Total Water Volume (gal)	Total Non-Water Volume (gal)
1	2017-12-06	2017-12-21	3,022	0	N/A
2	2017-12-06	2017-12-19	3,022	0	N/A

Fluid Composition Data

Job Number	Trade Name	Supplier	Purpose	Ingredient Name	CAS Number	Additive Percentage by Mass	Job Percentage by Mass	Mass Used (lb)
1				Fresh Water	7732-18-5	100	83.3963	N/A
				Hydrochloric acid	7647-01-0	100	0.3086	N/A
	SAND-COMMON BROWN-20/40. BULK	Halliburton		Crystalline silica. quartz	14808-60-7	100	4.0197	N/A
	SAND-COMMON BROWN-40/70. BULK	Halliburton		Crystalline silica. quartz	14808-60-7	100	12.0426	N/A
	MC B-8642	Multi-Chem	Bactericide/Biocide	Glutaraldehyde	111-30-8	100	0.0118	N/A
				Inert ingredient(s)	Not Available	100	0.0118	N/A
				Quaternary ammonium compounds.benzyl-C12-16-alkyldimethyl.chloride s	68424-85-1	100	0.0118	N/A
	OptiFlo-III Delayed	Halliburton	Breaker	Ammonium persulfate	7727-54-0	100	0.007	N/A
				Crystalline silica. quartz	14808-60-7	100	0.007	N/A
				Inert ingredient(s)	Not Available	100	0.007	N/A
	MO-67	Halliburton	Buffer	Inert ingredient(s)	Not Available	100	0.0188	N/A
	MO-67	Halliburton	Buffer	Sodium hydroxide	1310-73-2	100	0.0188	N/A
	HAI-404M(TM)	Halliburton	Corrosion Inhibitor	1-(Benzyl)quinolinium chloride	15619-48-4	100	0.0008	N/A
				Aldehyde	8940	100	0.0008	N/A
				Fatty amine salt	8940	100	0.0008	N/A
				Inert ingredient(s)	Not Available	100	0.01	N/A
				Isopropanol	67-63-0	100	0.0008	N/A
				Methanol	67-56-1	100	0.0008	N/A
				Proprietary ingredient(s)	Trade Secret	100	0.01	N/A
				Quaternary ammonium salt	8940	100	0.0008	N/A
	CL-22 UC	Halliburton	Crosslinker	Inert ingredient(s)	Not Available	100	0.0606	N/A
				Potassium formate	590-29-4	100	0.0608	N/A
				Proprietary ingredient(s)	Trade Secret	100	0.0608	N/A
	Biovert NWB	Halliburton	Diverting Agent	Polylactide resin	Trade Secret	100	0.0011	N/A
	FDP-S1208-15	Halliburton	Diverting Agent	Polylactide resin	Trade Secret	100	0.0004	N/A
	Excelerate PS-2	Halliburton	Friction Reducer	Hydrotreated light petroleum distillate	64742-47-8	100	0.0292	N/A
				Inert ingredient(s)	Not Available	100	0.0292	N/A
				Inorganic salt	Trade Secret	100	0.0292	N/A
	WG-36 GELLING AGENT	Halliburton	Gelling Agent	Guar gum	9000-30-0	100	0.0698	N/A
	FE-2	Halliburton	Iron Control	Citric acid	77-92-9	100	0.0019	N/A
	MC MX 2-2822	Multi-Chem	Scale Inhibitor	Amines.polyethylenepoly-.phosphonomethylated.sodiumsalts	70900-16-2	100	0.0137	N/A
				Inert ingredient(s)	Not Available	100	0.0137	N/A
				Methanol	67-56-1	100	0.0137	N/A
	OilPerm A	Halliburton	Surfactant	Ethanol	64-17-5	100	0.0005	N/A
				Heavy aromatic petroleum naphtha	64742-94-5	100	0.0005	N/A
				Inert ingredient(s)	Not Available	100	0.0005	N/A
				Naphthalene	91-20-3	100	0.0005	N/A
				Poly(oxy1.2-ethanediyl).alpha-(4-nonylphenyl)-omega-hydroxy-.branche d	127087-87-0	100	0.0005	N/A
2	SAND-PREMIUM WHITE-40/70. BULK	Halliburton		Crystalline silica. quartz	14808-60-7	100	12.0616	N/A

For data sources see^[7]

Water Sources

Water Diversion Start Date	Water Diversion End Date	Water Source Type	Total Water Volume (m³)
2017-12-04	2018-01-06	Surface Water - Lake	45138

For data sources see^[8]

Production Data

Period	Total Production Hours	Gas Quantity (m³)	Oil Quantity (m³)	Water Quantity (m³)
2018	5820	0.0	0.0	0.0
2019	7406	0.0	0.0	0.0
2020	2088	0.0	0.0	0.0

For data sources see^[9]

Occurences

Occurence Date	Occurence Type	Occurence Depth (m)	Occurence Control Depth (m)
2017-10-15	No Incident Encountered	0.00	0.00
2017-12-21	No Incident Encountered	0.00	0.00

For data sources see^[10]

References

↑ "General Well Data File - Licensing Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.
↑ "General Well Data File - Drilling Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.
↑ "General Well Data File". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-04-29.
↑ "ST49: Daily Spud and Drilling Activity List". Alberta Energy Regulator. 2020-04-30. Retrieved 2020-05-09.
↑ "General Well Data File - Tour-Direction Drilling Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.
↑ "General Well Data File - Tour-Perforation/Treatment Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.
↑ "Hydraulic Fracturing Water Use Data (Annual)". Alberta Energy Regulator. 2020-05-05. Retrieved 2020-05-10.
↑ "Hydraulic Fracturing Water Source Data (Annual)". Alberta Energy Regulator. 2018-12-31. Retrieved 2019-05-10.
↑ "Well Production Data - All Alberta". Alberta Energy Regulator. 2020-04-25. Retrieved 2020-05-07.
↑ "General Well Data File - Tour-Occurence Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

[1] "General Well Data File - Licensing Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

[2] "General Well Data File - Drilling Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

[3] "General Well Data File". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-04-29.

[4] "ST49: Daily Spud and Drilling Activity List". Alberta Energy Regulator. 2020-04-30. Retrieved 2020-05-09.

[5] "General Well Data File - Tour-Direction Drilling Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

[6] "General Well Data File - Tour-Perforation/Treatment Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

[7] "Hydraulic Fracturing Water Use Data (Annual)". Alberta Energy Regulator. 2020-05-05. Retrieved 2020-05-10.

[8] "Hydraulic Fracturing Water Source Data (Annual)". Alberta Energy Regulator. 2018-12-31. Retrieved 2019-05-10.

[9] "Well Production Data - All Alberta". Alberta Energy Regulator. 2020-04-25. Retrieved 2020-05-07.

[10] "General Well Data File - Tour-Occurence Data". Alberta Energy Regulator. 2020-04-22. Retrieved 2020-05-07.

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