Hydraulic Fracture Notices

2016-Present

Induced Seismicity Department

Oklahoma Corporation CommissionOil & Gas Conservation Division

Induced Seismicity Department

Oklahoma Corporation CommissionOil & Gas Conservation Division

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32

104

75

86

104

86

102

133 131

101

137 135 133

159

105

117

134

148

160

169166

116

175

135

180

146

124

150

82

0

20

40

60

80

100

120

140

160

180

200

Jul Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb

2015 2016 2017 2018 2019

FracNotice Submissions

Total

Oklahoma Earthquake Count Complete CatalogEvents matching FracNotice completions records

Oklahoma Earthquake Count M2.0+ CatalogEvents matching FracNotice completions records

Oklahoma Earthquake Count M2.7+ CatalogEvents matching FracNotice completions records

Oklahoma Earthquake Count M3.0+ CatalogEvents matching FracNotice completions records

OGS complete catalog to hydraulic fracture notices – temporal match

Method – changes due to new form creation – tighter resolution

• Map well trace, EQ Events (Oklahoma Geological Survey Catalog)

• Search EQ events: 5km from trace

• EQ event occurred:• (on or after start date) & (on or before end date+ 7 days)

Start date End date End date + 7 days

T E M P O R A L M A T C HNO MATCH NO MATCH

EQ Events5km Buffer

Induced Seismicity DepartmentOklahoma Corporation Commission

Oil & Gas Conservation Division

Toolbox Spatial Temporal Spreadsheet

Induced Seismicity Department

Oklahoma Corporation CommissionOil & Gas Conservation Division

Well Correlations

SUMMARY OF REVISED WELL COMPLETION SEISMICITY PROTOCOL*

Terms: Oil and Gas Conservation Division (OGCD)

Induced Seismicity Department (ISD)

Oklahoma Geological Survey (OGS)

Operators’ actions following seismic activity within 5 km (3.1 miles) of hydraulic fracturing

operations:

• If, during active operations, the operator detects a seismic event within the monitoring area at least

2.0 ML but less than 2.5 ML, the operator shall implement its seismicity response plan.

• If magnitude is at least 2.5 ML but less than 3.0 ML the operator will notify the ISD of the event.

o If operator has not initiated its seismicity response procedures prior to a 2.5 ML event, the

operator shall pause hydraulic fracture operations for 6 hrs and a technical conference call

will be held with ISD staff and operator regarding proposed seismicity response procedures.

o If operator has initiated its seismicity response procedures prior to a 2.5 ML event, a

technical conference call will be held with ISD staff and the operator regarding proposed

seismicity response procedures, if any, and steps ISD deems necessary.

• If magnitude is at least 3.0 ML but less than 3.5 ML:

o Operator shall pause hydraulic fracture operations for 6 hours and a technical conference

call will be held with ISD staff and operator regarding proposed seismicity response

procedures.

o Upon agreement between operator and OGCD staff regarding mitigation practices and

reduced seismic activity, operator will be permitted to resume with a revised completion

procedure.

• If magnitude is 3.5 ML or greater:

o Operator immediately suspends operations.

o In-person technical conference held with OGCD staff and operator to examine whether

operation can resume with changes.

Updated February 27th, 2018

• Well Completion Protocol issued December 2016

• Update to Protocol with current action levels issued February 2018

• Requires active seismic monitoring within completion AOI

• Seismic mitigation plans can be requested from operators at any time

• Completion data requested after pauses or shutdowns enforced

Well Completion Protocol

Induced Seismicity Department

Oklahoma Corporation CommissionOil & Gas Conservation Division

OGS Earthquakes 2015-Present

Induced Seismicity Department

Oklahoma Corporation CommissionOil & Gas Conservation Division

Un

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Color by:

Year(origintime)

2015

2016

2017

2018

2019

Earthquake Count M2.7+ OGS Catalog | Continuous (2015-2019)

2015:5.40 2016:3.60 2017:1.70 2018:1.10 2019:1.49

origintime (Month)

ISD_EQ Monthly Update Induced Seismicity Department 2/20/2019

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Earthquake Count M2.7+ OGS Catalog | Continuous (2015-2019)

2015:5.40 2016:3.60 2017:1.70 2018:1.10 2019:1.49

origintime (Month)

ISD_EQ Monthly Update Induced Seismicity Department 2/20/2019

Un

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orig

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Color by:

Year(origintime)

2015

2016

2017

2018

2019

Earthquake Count M3.0+ OGS Catalog | Continuous (2015-2019)

2015:2.48 2016:1.70 2017:0.83 2018: 0.53 2019:0.65

origintime (Month)

ISD_EQ Monthly Update Induced Seismicity Department 2/20/2019

Un

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Earthquake Count M3.0+ OGS Catalog | Continuous (2015-2019)

2015: 2.48 2016:1.70 2017: 0.83 2018: 0.53 2019:0.65

origintime (Month)

17

ISD_EQ Monthly Update Induced Seismicity Department 2/20/2019

Template Matching

Dots= magnitudeBlue OGS Pink USGS detections

Cumulative event count USGS Template Matched detections -dotted line

Cumulative seismic moment OGS events- Solid line

Histogram # events per hour

Preliminary template matching USGS, Golden, COBlue histogram #USGS Detections per 2 hoursRed histogram #OGS events per 2 hoursDots correlation coefficient template match

Cumulative detection count

Cumulative seismic moment (OGS events)

Tulsa Stone Quarry

• http://www.occeweb.com/News/2018/05-30-18EARTHQUAKEACTIONSUMMARY.pdf

Induced Seismicity DepartmentOklahoma Corporation Commission

Oil & Gas Conservation Division