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HomeMy WebLinkAbout1.20 Seismicity EvaluationTPR 176-25 Underground Injection Control Well Seismicity Evaluation CPX Piceance Holdings, LLC 34 S. Wynden Drive, Suite 240 Houston, TX 77056 CPX Piceance Holdings, LLC Proposed Injection Well Conversion TPR 176-25 Garfield County, Colorado Section 25, Township 7 South, Range 94 West, 6th PM 803.g.6 Seismicity Evaluation The four items included in the 800-Series Rules under the topic of Seismicity Evaluation are addressed in the following sections. 803.g.6.A and 803.g.6.B Evaluation of Known Faults and Historic Seismic Activity within 12 Miles of the Proposed Injection Well The map in Figure 803.g.6.A-A shows Precambrian Basement faults (red and green lines) and faults mapped in the Williams Fork Fm (brown lines) that are based on seismic data and have been published in the geologic literature. Also shown are earthquakes (red circles) that have occurred in and around Piceance Basin during the period 1973 to 2021, the time range which includes the major drilling activity, and the start-up of most water injection wells in the center of the basin. Additionally, current UIC wells (larger and smaller black circles) are shown. The only earthquake within 12 miles of the subject well was man-made, created by the 1969 Project Rulison Nuclear Frac conducted by the US Government. It is located about 6 miles west of the Subject Well. No natural earthquakes have been recorded within 12 miles of the subject well. The magnitude of natural earthquakes in the greater Piceance Area (only a portion of which are shown in the map) is shown by the histogram also in Figure 803.g.6.A-A. Fifty percent of the earthquakes measured 2.25 Magnitude or less, which are considered minor and are commonly not felt by humans. Magnitude 2.5 to 5.4 earthquakes are commonly felt, but typically cause minor or no damage. The location of natural earthquakes is strongly correlated with the margins of the basin. The middle of Piceance Basin, which is ringed on the map in Figure 803.g.6.A-A by the tan colored Cretaceous outcrop belt, has experienced few natural earthquakes. From this map, the occurrence of natural earthquakes has a very weak to no visual correlation to published basement faults or Williams Fork faults. Natural earthquakes also seem to have no observable correlation with proximity to UIC wells in the basin. Figure 803.g.6.A-B is the same as Figure 803.g.6.A-A but zoomed closer into the area of the Subject Well. Note that the published, seismic-based basement faults nearest the Subject Well are approximately 1.5 miles southwest and approximately 1.5 miles northeast. Also recall that the calculation of maximum injection volume is based on an injection zone radius of ¼ mile as set by COGCC in Regulation 803.f.3. The stratigraphic cross section in Figure 803.g.6.A-D shows the Subject Well with the two other CPX wells at Tepee Park Ranch. Note that the wells are in very close proximity to one another. Also shown on the left is a well more than three miles away. The Iles Formation with its members, the Rollins, Cozzette and Corcoran, are correlated. Note that there is very little variation in thickness in the nearby wells and in the well miles away showing that there is no anomalous thinning or thickening in the Iles Formation in the wells at Tepee Park Ranch in general and the Subject Well in particular. This is evidence for no normal or reverse faults CPX Piceance Holdings, LLC Proposed Injection Well Conversion TPR 176-25 Garfield County, Colorado Section 25, Township 7 South, Range 94 West, 6th PM encountered by these wells in the Iles Fm. Typically, a fault cut in a well will display either thinning due to missing section (normal fault) or thickening due to repeat section (reverse fault). 803.g.6.C Map of Potential for Seismic Activity within 12 miles of the Proposed Injection Well The map in Figure 803.g.6.C shows the long-term probability of a damaging earthquake within 12 miles of the Subject Well. Based on this map, 4 to 20 damaging earthquakes are expected in the next 10,000 years (https://www.usgs.gov/programs/earthquake- hazards/science/introduction-national-seismic-hazard-maps) near the Subject Well. Still very low, but slightly greater, is the probability of a damaging earthquake outside of Piceance Basin in the vicinity of Mt Sopris, the location of which is also shown in Figure 803.g.6.C. The URL for this map is shown here: https://earthquake.usgs.gov/earthquakes/map/?extent=38.28774,-109.05028&extent=39.95814,- 104.5706&range=search&showUSFaults=true&showUSHazard=true&baseLayer=terrain&timeZone=utc&search=%7B%22name%22:%22Search %20Results%22,%22params%22:%7B%22starttime%22:%221973-01-01%2000:00:00%22,%22endtime%22:%222022-01- 12%2023:59:59%22,%22maxlatitude%22:40.511,%22minlatitude%22:37.568,%22maxlongitude%22:-105.62,%22minlongitude%22:- 109.29,%22minmagnitude%22:1.5,%22eventtype%22:%22earthquake%22,%22orderby%22:%22time%22%7D%7D 803.g.6.D Wellbore Diagram of Injection Zone Relative to the Precambrian Basement The proposed Wellbore diagram for the Subject Well is shown in Figure 803.g.6.D-A. The diagram in Figure 803.g.6.D-B shows the same wellbore diagram of the injection zone in the Subject Well (left side, drastically shrunk in size) along with the stratigraphic column (middle), expected depths, and expected thicknesses (right) for the formations from surface to Precambrian Basement at the location of the Subject Well. Based on the available well control near the Subject Well, the Precambrian Basement will be at a depth of approximately 22,000’, which is about 10,000 feet below the proposed injection zone in the Subject Well. Given all the information above and in the referenced figures regarding: • published basement and Williams Fork faults, • historic earthquake activity, • few earthquakes in the basin, • no observable correlation between earthquakes and published faults in the basin proper, • no observable correlation between earthquakes and existing UIC wells in the basin, • no log-based evidence of faulting in the proposed injection zone of the Subject Well, • the proposed injection zone in the Subject Well is approximately 10,000 feet shallower than the Precambrian Basement, there is extremely low potential for induced seismicity during the proposed injection operations. 6 miles CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Known Faults, Earthquakes and UIC Wells within 12 Miles of Subject Well and Beyond Figure 803.g.6.A-ASources: Basement Faults, Hoak, T.E. and A.L. Klawitter, 1995, Figure 9, Delineation of Piceance Basin Basement Structures Using Multiple Source Data: Implications for Fractured Reservoir Exploration, Intergas `95: International Unconventional Gas Symposium, Tuscaloosa, AL Williams Fork Faults, Cumella, S.P. and D.B. Ostby, 2003, Figure 21, RMAG Piceance Basin Guidebook Earthquakes, https://earthquake.usgs.gov/earthquakes/search/ Legend Location of Subject Well 12 mi Radius Around Subject Well Basement Reverse Fault Basement Normal Fault Williams Fork and Iles Strike- Slip Fault UIC Well in Iles Fm UIC Well in Zone other than Iles Fm Earthquake, 1973-2021 with Magnitude 1.7 Project Rulison Nuclear Frac in 1969, Reported Magnitude 5.3 CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Known Faults, Earthquakes and UIC Wells within 12 Miles of Subject Well, Zoomed View Figure 803.g.6.A-BSources: Basement Faults, Hoak, T.E. and A.L. Klawitter, 1995, Figure 9, Delineation of Piceance Basin Basement Structures Using Multiple Source Data: Implications for Fractured Reservoir Exploration, Intergas `95: International Unconventional Gas Symposium, Tuscaloosa, AL Williams Fork Faults, Cumella, S.P. and D.B. Ostby, 2003, Figure 21, RMAG Piceance Basin Guidebook Earthquakes, https://earthquake.usgs.gov/earthquakes/search/ Legend Location of Subject Well 12 mi Radius Around Subject Well Basement Reverse Fault Basement Normal Fault Williams Fork and Iles Strike- Slip Fault UIC Well in Iles Fm UIC Well in Zone other than Iles Fm Earthquake, 1973-2021 with Magnitude 1.7 Project Rulison Nuclear Frac in 1969, Reported Magnitude 5.3 CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Typical Seismic Expression of Precambrian Basement Faults Shown in the Literature Figure 803.g.6.A-C Seismic line modified from, Hoak, T.E. and A.L. Klawitter, 1995, Figure 7, Delineation of Piceance Basin Basement Structures Using Multiple Source Data: Implications for Fractured Reservoir Exploration, Intergas `95: International Unconventional Gas Symposium, Tuscaloosa, AL Reverse Basement Fault Normal Basement Fault Legend Note: •Horizon and fault colors added to original published interpretation for more clarity in this UIC well application •MWX well projected ~2 miles north to seismic line •McDaniel well projected ~15 miles north to seismic line TEP Superior MWX-1 6S-94W sec 34 TD 8,350’, Iles Fm Terra McDaniel (OWP) 1-11 9S-94W sec 11 TD 14,452’, below Weber Ss SW NE 3.2 miles 1,198 feet 2,077 feet Subject Well Iles Fm Proposed Injection Zone A normal fault in a well is typically expressed as a thinned zone due to missing section. A reverse fault in a well is typically expressed as a thickened zone due to repeat section. North South Rollins Cozzette Corcoran est est Figure 803.g.6.A-D CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Stratigraphic Correlation of the Iles Fm Showing No Evidence of Faulting in the Iles Fm Based on Thickness Changes CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Earthquake Hazards Within 12 miles of the Proposed Injection Well and Beyond Figure 803.g.6.C Legend Earthquakes, 1973 through 2021 Mt Sopris Basemap and data from: USGS Interactive Earthquakes and Hazards Map Approximate Location of Subject Well Approximate 12 mi Radius Around Subject Well https://earthquake.usgs.gov/earthquakes/map/?extent=38.28774,-109.05028&extent=39.95814,- 104.5706&range=search&showUSFaults=true&showUSHazard=true&baseLayer=terrain&timeZone=utc&search=%7B%22name%22:%22 Search%20Results%22,%22params%22:%7B%22starttime%22:%221973-01-01%2000:00:00%22,%22endtime%22:%222022-01- 12%2023:59:59%22,%22maxlatitude%22:40.511,%22minlatitude%22:37.568,%22maxlongitude%22:-105.62,%22minlongitude%22:- 109.29,%22minmagnitude%22:1.5,%22eventtype%22:%22earthquake%22,%22orderby%22:%22time%22%7D%7D Expected number of occurrences of damaging earthquake shaking in 10,000 years National Seismic Hazard Map Subject Well CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Proposed Wellbore Diagram Figure 803.g.6.D-A Figure 803.g.6.D-B CPX Piceance Holdings, LLC Proposed Injection Well TPR 176-25 Garfield County, Sec 25 7S 94W Stratigraphic Chart, Piceance Basin Showing Formations from Surface to Precambrian Basement with Depths and Thicknesses Note: •ExxonMobil O’Connell R11X-34P well which is located 9.1 miles east of the Subject Well in Sec 34 7S 92W. Tops adjusted to merge with Subject Well to account for drastic difference in KB Modified from https://pubs.usgs.gov/dds/dds-069/dds-069- b/REPORTS/Chapter_7.pdf Williams Fork Surface Ohio Ck Mancos B NiobraraFrontier Dakota Morrison Curtis Entrada Chinle Weber Maroon Minturn Belden Molas Leadville Precambrian Chaffee (Dyer/Parting) Rollins Cozzette Corcoran Mancos Expected Depths from TPR #1 and ExxonMobil O’Connell (MD, Ft) Est 22,000’ 11,638 0 6,879 7,540 10,988 11,422 11,950 12,200 12,570 12,700 12,730 12,870 12,968 14,948 17,748 17,800 18,077 17,282 11,850 13,323 14,961 Expected Interval Thickness from These Tops (Ft) 661 3,448 434 216 212 1,473 1,638 390 250 370 130 30 140 98 1,980 2,334 466 52 277 500’ to 1,000 est Proposed Injection Zone Estimated ~10,000’ above Precambrian Basement Proposed Injection Zone Wellbore Diagram of Subject Well Shown at Depth and Scale More Appropriate for this Diagram Base Injection Zone 11,735’, PBTD 11,825 in Subject Well Proposed Injection Zone in Subject Well Expected to be ~10,000’ above Precambrian Basement