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2020 Swanson Tyonek
Hilcorp Alaska, LLC 11 February 18, 2021 Mrs. Jessie Chmielowski, Commissioner Alaska Oil and Gas Conservation Commission 333 W. 7'I' Avenue, Suite 100 Anchorage, AK 99501 Post Office Box 244027 Anchorage, AK 99524-4027 3800 Centerpoint Drive Suite 100 Anchorage, AK 99503 Phone: 907/777-8322 Fax: 907/777-8310 Re: 2020 Annual Material Balance Calculations of Production and Iniection Volumes — Swanson River Gas Storage Facility #3 (Tyonek 77-3 sand) Swanson River Field Dear Commissioner Chmielowski: Attached for your review is the annual material balance calculation of production and injection volumes for the Swanson River Gas Storage Facility #3 (SRGSF #3), as required per AOGCC Storage Injection Order #6 (SIO #6). This material balance report covers the primary production period (Jul. 2004 — Nov. 2005), as well as the gas storage operations that have taken place since Dec. 2005. The 77-3 reservoir in the Swanson River field was in active use for all of 2020 and was an important component of total gas deliverability for the Cook Inlet. Two active wells were used for injection and production in 2020 — SCU 42-05X and SCU 42-05Y. A third well, SCU 42-05Z, was drilled into the 77-3 in December 2020, but it was not completed in time to be included in the 2020 annual report. Hilcorp has performed material balance calculations on the 77-3 reservoir to provide assurance of continued reservoir confinement of the gas storage volumes. Supporting data is attached in numerical and graphical form (P/Z plot) for the convenience of the reader. Notice that eighteen BHP calculations were made for the 2020 storage cycle between January and December. These data points are plotted with the historical data and they conform to the overall curve, indicating continued confinement of the storage gas. Sincerely, Meredyth Richards Reservoir Engineer Attachments: 1) Tyonek 77-3 Annual Production/Injection Plot 2) Tyonek 77-3 P/Z Data 3) Tyonek 77-3 P/Z vs Cumulative Production Plot t N m a` 0 m o E a 12 0 m m E n o O c o t o o d o �C 6 a O m i m L1 a d p I � � 9 ; > - m o N m a a 2 W E a n N C O Y o N �C n Ol � > C p� O C u � C 0 3 1 N N O > O N N a N N a LL 0 N N 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (Oj:)SW) uoipaful /uol»npOid Attachment #2 77-3 P/Z Data ATTACHMENT #2 -- SRGSE POZ DATA (Tyonetc 77-3 Sand) Parameter Value Units Gas Gravity 0.563 7806 Bench Datum 7811 ft (tvd) Datum Temp. 141 -F Avg Temp. 77 of 2/18/2021 Wellname OH -- MD OH --ND Top 7972 7806 midperf 7977 7811 Bottom 7982 7816 2/18/2021 Wellname Date Test Type Test Duration (hrs) Gauge Measuretl Test Depth MTD ft Pressure at MTD, psis Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Pala 2004 - 05 Primary Production Date Test Type Duration MeTest Pressure at Z Factor Pressure, Cum Gas, bcf 42A-5 06/27/04 ISurf PBU 1 0 3994 1 0.9803 4774 0.0000 4870 42A-5 2006 Injection Cycle Surf PBU 1 0 3050 0.9110 3646 0.5354 4002 42A-5 BHP Static 1 7982 3194 0.8933 3194 0.8403 3576 42A-5 BHP PBU 8 7982 2482(SITP) 0.8859 2926 1.0599 3303 42A-5 BHP PBU 8 7811 1985 0.8835 1985 1.7931 2247 42A-5 F12/21/04 SITP 2 0 1565 0.8859 1871 1.8881 2112 42A-5 SITP 3 0 1385 0.8923 1655 2.1024 1855 10/3/2006 SITP SITP 3 0 1490 0.8883 1781 2.1051 2005 42A-5 BHP PBU 8 7811 1556 0.8959 1556 2.2666 1737 2006.2007 Production/Injection Cycle auge �asured Datum Wellname Date Wellname Date Test Type Duration MeTest Pressure at Z Factor Pressure, Cum Gas, bcf P/Z, Psia SITP 48 0 (hrs) Test Depth MTD, Psia 2.3406 Psia 42A5 5/21/2006 2006 Injection Cycle 0 0 1700 0.8801 2031 2.2750 2308 42A5 42A&B-5 1 1/4/2006 1 BHP Static 42 7811 1857 0.8803 1 2232 1 2.1371 1 2535 2006 Production Cycle SITP/BHP PBU 15 0 1875 0.8801 2256 2.1420 2563 42A&B-5 3/10/2006 1 SITP 14 10 11895 0.8802 2236 2.1166 2540 42A&B-5 tic 1 7811 2026 0.8827 2026 2.1793 2295 4213-5 ZIE 2h-5, BHP 120 0 1412 0.8911 1689 2.3533 1895 4000 1.4109 1 4306 42-05X 10/3/2006 SITP 53 0 3312 428-5 96 10 11280 0.8969 1530 2.4245 1706 2006.2007 Production/Injection Cycle Wellname Date Test Type Test Duration (he) auge Measured Test Depth Pressure al MTD, psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Pala 42A&B-5 5/17/2006 SITP 48 0 1528 0.8871 1826 2.3406 2058 42A5 5/21/2006 Psuedo SITP 0 0 1700 0.8801 2031 2.2750 2308 42A5 6/9/2006 Psuedo SITP 192 0 2010 0.8794 2403 2.1013 2733 42-05X 8/3/2006 SITP/BHP PBU 15 0 1875 0.8801 2256 2.1420 2563 42-05X 8/24/2006 SITP/BHP PFO 12 0 2400 0.8851 2886 1.9311 3261 42-05X 9/7/2006 SITP 24 0 2826 0.9004 3396 1.6956 3772 42-05X 9/26/2006 SITP 24 0 3347 0.9290 4000 1.4109 1 4306 42-05X 10/3/2006 SITP 53 0 3312 0.9267 3958 1.3853 4271 42-05X 10/6/2006 SITP 11 0 3309 0.9265 3955 1.3781 4269 42-05X 10/17/2006 SITP 107.5 0 3245 0.9234 3896 1.3564 4219 42-05X 10/20/2006 BHP PFO 8 7794 3241 0.9216 3862 1.3440 4191 42-05X 11/8/2006 SITP 31.5 0 3445 0.9358 4118 1.2292 4401 42-05X 11/16/2006 SITP 44.5 10 3403 0.9328 4067 1.2017 4360 42-05X 12/3/2006 SITP 146.3 0 3119 0.9583 3728 1.2614 3890 42-05X 1/7/2007 SITP 89 0 3469 0.9374 4146 1.0622 4423 42-05X 4/20/2007 SITP 20 0 3794 0.9626 4534 0.7819 4710 42-05X 5/22/2007 SITP 8 0 3755 0.9583 4473 0.6981 4668 42-05X 8/28/2007 SITP 12 0 3715 0.9561 4440 0.5362 4644 42-05X 1 11/26/2007 ISITP 840 0 13815 1 0.9644 1 4560 1 0.4058 4728 Attachment 42 77-3 P/Z Data 2/18/2021 Wellname Date Test Type Test Duration (hrs) auge Measured Test Depth Pressure at MTD, Psia Z Factor Datum Pressure, Psia Cum Gas, not P/Z, Psia 2008 Production Cycle 72 0 3214 0.9182 3796 0.5991 4134 42-05X 11/30/2008 SITP 42-05X 12/14/2007 1 SITP 189.5 10 3647 0.9507 4359 0.4640 4585 42-05X 1/4/2008 SITP 31 0 3258 0.9231 3890 0.6221 4214 42-05X 1/23/2008 SITP 7 0 2676 0.89343199 336 0.9051 3581 42-05X 2/8/2008 SITP 10 0 1990 0.8797 2379 1.2354 2704 42-05Y 2/13/2008 SITP 27.3 0 1909 0.8800 2282 1.3153 2593 2008 Injection Cycle Cum Gas, bcf P/Z, Psia 42-05X 5/22/2010 SITP 24 0 3544 0.9361 4185 0.5215 42-05X 5/16/2008 ISITP 24 0 3668 0.9476 4311 0.7183 4549 42-05X 6/6/2008 SITP 216 0 3771 0.9552 4427 0.6227 4635 42-05X 7/6/2008 SITP 96 0 3915 0.9663 4587 0.5028 4747 42-05X 9/22/2008 SITP 96 0 3796 0.9571 4455 0.3698 4655 42-05Y 10/7/2008 SITP 96 0 3857 0.9618 4523 0.3667 4703 2008/2009 Production Cycle Wellname Date Test Type Test Duration (hrs) Gauge Measured Test Depth (MTD), It Pressure at MTD, psia Z Factor tum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 11/13/2008 SITP 72 0 3214 0.9182 3796 0.5991 4134 42-05X 11/30/2008 SITP 24 0 2847 0.8995 3372 0.7908 3749 42-05X 12/8/2008 SITP 96 0 2719 0.8942 3222 0.8756 3603 42-05X 1/14/2009 SITP 24 0 1518 0.8880 1792 1.5812 2018 42-05Y 4/21/2009 SITP 336 0 1799 0.8740 2148 1.8027 1 2458 2009 Injection Cycle 42-05X 1 11/11/2009 1 SITP 1192 10 14266 1 0.9922 4967 1 0.1367 5006 2009/2010 Production Cycle 42-05X 1 12/7/2009 ISITP 30 0 3834 0.9808 4808 0.1798 4902 42-05X 1/10/2010 SITP 48 0 3750 0.9604 4512 0.2776 4698 42-05X 1/19/2010 SITP 48 0 3275 0.9543 4419 0.3122 4631 42-05X 1 4/10/2010 ISITP 288 0 3544 0.9183 3881 0.5812 4226 2010 Injection Cycle Wellname Test Date Test Type Duration (hm) Gauge Measured Test Depth (MTD), ft Pressure at MTD, psis Datum Z Factor Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 5/22/2010 SITP 24 0 3544 0.9361 4185 0.5215 4471 42-05X 9/1/2010 SITP 24 0 4253 0.9901 4971 0.1269 5021 42-05X 9/19/2010 SITP 72 0 0.9745 4765 0.1227 4890 42-05X 10/21/2010 SITP 552 0 4101 0.9779 4804 0.1203 4913 42-05Y 11/9/2010 SITP 1168 10 14025 0.9719 1 4720 1 0.1181 1 4856 2 01 012 01 1 Production Cycle 42-05X 1 1/4/2011 ISITP 124 10 13546 1 0.9363 1 4187 0.3263 4472 42-05XY 1 3/1/2011 ISITP 0.8670 1578 1 1.3387 1 1820 2011 Injection Cycle 42-05XY 10/30/2011 1 SITP 0.9945 5057 0.1331 5085 2012 Production/Injection Cycle Attachment #2 77-3 P/Z Data 2/19/2021 Wellname Dale Test Type Test Duration (Ins) Gauge Measured Test Depth (MTD), fl Pressure at MTD, Psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 5/31/2012 SITP/BHP PBU 192 7811 2448 0.8219 2448 1.4721 2978 42-05X 8/7/2012 SITP 3939.7 0 2195 0.8923 2604 1.5031 2918 42-05Y 8/7/2012 SITP 3577.7 0 2185 0.8922 2592 1.5031 2905 42-05X 9/22/2012 SITP 3445.7 0 2541 0.9014 3013 1.3469 3343 42-05Y 9/22/2012 SITP 3363.7 0 2553 0.9018 3027 1.3469 3357 42-05X 10/21/2012 SITP 3327.7 0 3165 0.9304 3737 1.0322 4017 42-05Y 10/21/2012 SITP 3357.7 0 3155 0.9298 3726 1.0322 4007 SITP 0 2955.7 0.9037063 3,501 0.3952 3874 42-05Y 9/28/2014 2013 Production/Injection Cycle 0 3119.7 0.9135099 3,688 0.3912 4038 Wellname Dale Test Type Test Duration (hrs) Gauge Measured Test Depth (MTD), It Pressure at MTD, Psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 4/12/2013 SITP 0 3661 0.96047 4303 0.9806 4480 42-05X 5/18/2013 SITP 0 3425 0.94511 4037 0.7394 4271 42-05Y 5/18/2013 SITP 0 3427 0.94522 4039 0.7394 4273 42-05X 8/17/2013 SITP 0 3801 0.97011 4461 0.3172 4598 42-05Y 8/17/2013 SITP 0 3806 0.97048 4467 0.3172 4603 42-05X 9/7/2013 SITP 0 13748 0.9664 4401 0.3005 4554 42-05Y 10/27/2013 SITP Pressure at MTD, psia 0 3929 0.97912 4604 0.1788 4702 2014 Production/injection Cycle Wellname Date Test Type+(hm) Test Gauge Measured Test Depth MTD ft42-05X Pressure at MTD, psis Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 10/30/2013 SITP0 3939.7 0.9844495 4,615 0.1751 4687 42-05X 4/14/2014 SITP0 3577.7 0.9486947 4,208 0.2911 4435 42-05Y 5/14/2014 SITP0 3445.7 0.9373886 4,059 0.2914 4330 42-05X 6/10/2014 SITP0 3363.7 0.9308376 3,966 0.3226 4261 42-05Y 7/31/2014 SITP0 3327.7 0.9280766 3,925 0.2979 4229 42-05Y 8/5/2014 SITP 0 3357.7 0.9303726 3,959 0.2902 4255 42-05Y 9/6/2014 SITP 0 2955.7 0.9037063 3,501 0.3952 3874 42-05Y 9/28/2014 SITP 0 3119.7 0.9135099 3,688 0.3912 4038 42-05Y 10/1/2014 SITP 0 3014.7 0.9070611 3,569 0.3997 3934 42-05Y 10/5/2014 SITP 0 2873.7 0.8993665 3,407 0.4413 3788 42-05X 11/2/2014 SITP 0 2723.7 0.8924065 3,235 0.5348 3625 42-05X 12/2/2014 SITP 0 2656.7 0.8897095 3,158 0.5941 3549 42-05X 1 12/31/2014 ISITP 10 2633.7 0.8888426 1 3,131 0.6378 3523 2015 Productionllnjection Cycle Wellname Date TestType Test Duration (hre) Gauge Measured Test Depth MTD ft Pressure at MTD, psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 1/9/2015 BHP 7896 3206 0.8913932 3,207 0.6441 3598 42-05X 1/21/2015 SITP 0 2694.7 0.8912078 3,202 0.6111 3592 42-05X 2/23/2015 SITP 0 2688.7 0.8909658 3,195 0.6607 3586 42-05X 5/1/2015 SITP 0 2449.7 0.8829988 2,919 0.8274 3305 42-05X 5/13/2015 SITP 0 2422.7 0.8823055 2,887 0.8415 3273 42-05X 6/1/2015 SITP 0 2583.7 1 0.8870623 3,074 0.8094 3465 42-05X 6/14/2015 SITP 0 2594.7 0.8874417 3,086 0.8174 3478 42-05X 6/28/2015 SITP 0 2594.7 0.8874417 3,086 0.8181 3478 42-05X 7/12/2015 SITP 0 2530.7 0.8853316 3,012 0.8468 3403 42-05X 7/20/2015 SITP 0 2513.7 0.8848106 2,993 0.8602 3382 Attachment %2 77-3 P/Z Data 2/18/2021 42-05X 8/5/2015 SITP 0 2448.7 0.8829724 2,918 0.8928 3304 42-05X 8/14/2015 SITP 0 2514.7 0.8848408 2,994 0.8811 3384 42-05X 8/22/2015 BHP 7910 2942 0.8835421 2942 0.9147 3330 42-05X 9/3/2015 SITP 0 2394.7 0.8816311 2,855 0.9322 3238 42-05X 9/28/2015 SITP 0 2380.7 0.8813109 2,839 0.9541 3221 42-05X 10/4/2015 SITP 0 2368.7 0.8810455 2,825 0.9636 3206 42-05X 11/13/2015 SITP 0 2048.7 0.8770805 2,452 1.1546 2796 42-05X 11/18/2015 SITP 02095.7 0.8772847 2,507 1.1886 2858 42-05X 12/14/2015 1 SITP 0 2254.7 1 0.8789433 2,693 1.0992 3063 2016 Production/Injection Cycle Weliname Date Test Type Test Duration (he) Gauge Measuretl Test Depth MTD ft Pressure at MTD, pane Z Factor um Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 2/19/2016 SITP 0 1931 0.877146 2,315 1.0533 2639 42-05X 3/5/2016 BHP 7896 2870 0.8819539 2.871 1.0532 3255 42-05X 5/17/2016 SITP 0 2334 0.8803254 2,785 1.0961 3163 42-05X 5/30/2016 SITP 0 2634 0.8888537 3,132 1 0.9800 3523 42-05X 6/19/2016 SITP 0 2958 0.9038334 3,504 0.8262 3877 42-05X 7/14/2016 SITP 0 3530 0.9445013 4,154 0.5438 4398 42-05X 7/15/2016 SITP 0 3520 0.9436376 4,143 0.5328 4390 42-05X 8/2/2016 SITP0 4090 1.0013074 4,782 0.2904 4776 42-05X 8/30/2016 SITP 0 4230 1.0180554 4938.1332 0.0964 4851 42-05X 10/11/2016 BHP 1 17968 4960 1.1213093 5742 -0.0141 5121 42-05X 11/16/2016 SITP 1 10 3500 0.9419263 4,120 0.1454 4374 2017 Production/Injection Cycle Weliname Date Test Type Test Duration (hrs) Gauge Measured Test Depth MTD R Pressure at MTD, psla Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05X 6/5/2017 SITP 0 2280 0.8823726 2,777 0.7798 3147 42-05X 6/24/2017 SITP 0 2373 0.8849871 2,889 0.7812 3264 42-05X 7/23/2017 SITP 0 2425 0.8866438 2,951 0.7930 3328 42-05X 9/12/2017 SITP 0 2690 0.8971043 3,264 0.7033 3638 42-05X 10/14/2017 SITP 0 2703 0.8976875 3,279 0.6896 3653 42-05X 11/20/2017 SITP 0 2684 0.8968347 3,257 0.6823 3632 2018 Production/Injection Cycle Wellname Date Test Type DutionMeasured (hr) Gauge Test Depth (MTD). It Pressure at MTD, psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Psia 42-05Y 2/11/2018 SITP 0 2215 0.8592 2,707.50 0.8838 3151 42-05Y 4/13/2018 SITP 0 2098 0.8612 2,565.77 1.0833 2979 42-05Y 5/1/2018 SITP 0 2135 0.8628 2,610.69 1.0537 3026 42-05Y 5/16/2018 SITP 0 2266 0.8640 2,768.98 1.0048 3205 42-05Y 6/2/2018 SITP 0 2333 1 0.8659 2,849.47V0.4595 3291 42-05Y 6/16/2018 SITP 0 2420 0.8687 2,953.50 3400 42-05Y 6/26/2018 SITP 0 2544 0.8735 3,100.81 3550 42-05X 7/18/2018 SITP 0 2780 0.8881 3,452.67 3888 42-05Y 9/14/2018 SITP 0 3200 0.8917 3,885.26 4357 42-05Y 10/4/2018 SITP 0 3251 0.8967 3,920.55 4372 42-05Y 10/19/2019 SITP 0 3262 0.8984 3,933.06 4378 42-05Y 11/19/2018 SITP 0 3021 0.9111 3,657.40 4014 42-05X 12/9/2018 SITP 0 2960 0.9132 3,626.30 3971 42-05Y 12/30/2018 SITP 0 2876 0.9139 3,527.83 0.5630 1 3860 Attachment 172 77-3 P/Z Data 2/18/2021 2019 Production/Injection Cycle Wellname Date Test Type Test Gauge Duration Measured (hrs) Test Depth (MTD), ft Pressure at MTD, psia Z Factor Datum Pressure, Psia Cum Gas, bcf P/Z, Palo 42-05X 1/4/2019 SITP 0 2830 0.8928 3,377.6 0.5775 3783 42-05X 1/27/2019 SITP 0 2851 0.8940 3,402.7 0.5918 3806 42-05X 2/24/2019 SITP 0 2803 0.8914 3,345.4 0.6068 3753 42-05X 3/16/2019 SITP 0 2844 0.8936 3,394.4 0.6071 3799 42-05Y 4/30/2019 SITP 0 2558 0.8799 3,052.4 0.7358 3469 42-05Y 5/15/2019 SITP 0 2465 0.8765 2,941.2 0.7992 3356 42-05Y 6/2/2019 SITP 0 2465 0.8765 2,941.2 0.8242 3356 42-05X 7/31/2019 SITP 0 2291 0.8715 2,733.2 0.9434 3136 42-05X 8/31/2019 SITP 0 2325 0.8723 2,773.9 0.9515 3180 42-05X 9/30/2019 SITP 0 2370 0.8735 2,827.7 0.9501 3237 42-05X 10/12/2019 SITP 0 2526 0.8787 3,014.2 0.9102 3430 42-05X 12/9/2019 SITP 0 3211 0.9165 3,833.2 0.5915 4182 2020 Production/Injection Cycle Wellname Date Test Type Test Duration (hrs) Gauge Measured Test Depth (MTD), it Pressure at MTD, psia Z Factor Datum Pressure, psia Cum Gas, bcf P/Z, psia 42-05Y 1/16/2020 SITP N/A 0 2075 0.8689 2422 1.1731 2787 42-05X 2/8/2020 SITP N/A 0 1544 0.8764 1799 1.3521 2053 42-05Y 2/11/2020 SITP N/A 0 1661 0.8727 1935 1.3499 2217 42-05X 2/13/2020 SITP N/A 0 1644 0.8735 1916 1.3499 2194 42-05Y 2/26/2020 SITP N/A 0 1611 0.8740 1876 1.4046 2146 42-05X 3/11/2020 SITP N/A 0 1459 0.8795 1698 1.4828 1931 42-05Y 3/20/2020 SITP N/A 0 1577 0.8750 1836 1.4864 2098 42-05X 4/3/2020 SITP N/A 0 1593 0.8749 1856 1.4990 2121 42-05Y SITP N/A 0 1729 0.8712 2015 1.4794 2313 42-05X 0 SITP N/A 0 1987 0.8690 2320 1.3554 2670 42-05Y 0 SITP N/A 0 2505 0.8772 2926 1.0616 3336 42-05X 0 SITP N/A 0 2991 0.8987 3491 0.8819 3885 42-05Y N411412020,0 0 SITP N/A 0 3330 0.9183 3878 0.6467 4223 42-05X 20 SITP N/A 0 3595 0.9366 4182 0.4778 4465 42-05Y 20 SITP N/A 0 3870 0.9564 4490 0.2920 4695 42-05X 20 SITP N/A 0 3719 0.9455 4322 0.1802 4571 42-05Y 10/27/2020 SITP N/A 0 3877 0.9569 4498 0.0721 4701 42-05X 11/12/2020 SITP N/A 0 3822 0.9532 4439 0.0414 4657 42-05Y 12/23/2020 SITP N/A 0 2923 0.8947 3411 0.3112 3812 N N N 11 00 c -I N N d T+ O o 0 • _ + a o v c c .e 'o c °—� � u v v a v v v v a w 0 a m E Z o c $ Gpp O o O O Od0 Od0 Od9 Od9 Opp W W W OOE LL U o S Gd N N C p6 N G6 N C N N to; N VI YII N Y/i YIl h 00 C y {yyp{yyp�� b b a q Zi •O•t1 rO♦t1 .••---111 •t• -i1 �M•--1I �t•§y •b•yy 1••ogy �t•§.1 d E N w N 0 oa �c 4 M N O + a 0 a . w LL U 00 C y d E N w 0 oa �c a o ME � LqU M ■ 1� F ■ ■ + ■• ME • • e4i ■ • • ■ b m ■WIN N a pod • i M + I� � 4 O N (p u C (elsd) Z/d Q N
