Table of Contents Table of Contents 2 List of Tables 4 List of Figures 5 Company Snapshot 7 Key Information 7 Company Overview 7 Energy XXI Ltd., Valuation and Financial Data, 2011-2015 8 Energy XXI Ltd., Share Price Performance, 2011-2015 8 Share Price Performance, 2011-2015 8 Key Valuation Metrics, 2011-2015 9 Energy XXI Ltd., Production and Reserves Trends 10 Total Oil and Gas, Reserves and Production 10 Total Crude Oil and Natural Gas Production and Reserves Trend, 2011-2015 10 Total Crude Oil & Natural Gas Production and Reserves By Country/Region, 2011-2015 12 Total Crude Oil and Natural Gas Reserve Changes, 2011-2015 14 Crude Oil/Liquids Production and Reserve 15 Crude Oil/Liquids Production and Reserve Trend, 2011-2015 15 Crude Oil Production and Reserves By Country/Region, 2011-2015 16 Crude Oil/Liquids Reserve Changes, 2011-2015 18 Natural Gas Production and Reserve 19 Natural Gas Production and Reserve Trend, 2011-2015 19 Natural Gas Production and Reserves, By Country/Region, 2011-2015 20 Natural Gas Reserve Changes, 2011-2015 22 Total Crude Oil and Natural Gas Reserves Life Index 23 Total Crude Oil and Natural Gas Reserves Life Index, 2011-2015 23 Total Crude Oil and Natural Gas Reserves Life Index, By Country/Region, 2011-2015 24 Energy XXI Ltd., E&P Costs Trends 26 Allocation of the Upstream Capital Expenditure 26 Upstream Capital Expenditure, 2011-2015 26 Acquisition Costs By Country/Region, 2011-2015 27 Exploration and Development Costs, By Country/Region, 2011-2015 29 Oil and Gas Cost Per boe, US$/boe 31 Oil and Gas Cost Per boe, US$/boe, 2011-2015 31 Oil and Gas Cost Per boe, US$/boe, By Country/Region, 2011-2015 33 Energy XXI Ltd., Reserve Replacement Ratio 35 Oil and Gas Production Replacement Ratio 35 Oil and Gas Production Replacement Ratio, 2011-2015 35 Oil and Gas Production Replacement Ratio, By Country/Region, 2011-2015 37 Energy XXI Ltd., Results of Oil & Gas Operations Trend 41 Oil and Gas Revenue and Expenses 41 Oil and Gas Revenue and Expenses, 2011-2015 41 Oil and Gas Revenue and Expenses, By Country/Region, 2011-2015 42 Oil and Gas Revenue and Expenses, Per boe 47 Oil and Gas Revenue and Expenses, By boe, 2011-2015 47 Oil and Gas Revenue and Expenses Per boe, By Country/Region, 2011-2015 48 Oil and Gas Performance Metrics 52 Energy XXI Ltd., Land Holdings and Well Data 53 Developed and Undeveloped Acreage 53 Gross and Net Developed and Undeveloped Acreage, 2011-2015 53 Gross and Net Developed and Undeveloped Acreage, By Country/Region, 2011-2015 54 Well Statistics 57 Producible Oil and Gas Well, 2011-2015 57 Producible Oil and Gas Well, By Country/Region, 2011-2015 58 Exploration and Development Wells Drilled, 2011-2015 62 Exploration and Development Wells Drilled, By Country/Region, 2011-2015 63 Recent Developments 64 Energy XXI Ltd. - Recent Developments 64 Apr 14, 2016: Energy XXI Enters Restructuring Support Agreement With Second Lien Noteholders To Strengthen Balance Sheet And Reduce Debt 64 Feb 29, 2016: Energy XXI Announces Receipt Of NASDAQ Notice Of Deficiency 65 Appendix 66 Methodology 66 Coverage 66 Secondary Research 66 Primary Research 66 Data Information Sources 67 Company Source 67 SEC/Other Regulatory Filings 67 Other Sources 67 Expert Panel Validation 67 Data Definition 67 Oil and Gas Reserves 67 Units of Measure 68 About GlobalData 68 Disclosure 68 Disclaimer 68

List of Tables Table 1: Energy XXI Ltd., Key Facts 7 Table 2: Energy XXI Ltd., Share Price Performance, 2011-2015 8 Table 3: Energy XXI Ltd., Key Valuation Metrics, 2011-2015 9 Table 4: Energy XXI Ltd., Total Crude Oil and Natural Gas, Production and Reserves, mmboe, 2011-2015 11 Table 5: Energy XXI Ltd., Total Crude Oil & Natural Gas Production and Reserves, By Country/Region, mmboe, 2011-2015 13 Table 6: Energy XXI Ltd., Total Crude Oil and Natural Gas Reserve Changes, mmboe, 2011-2015 14 Table 7: Energy XXI Ltd., Crude Oil Production and Reserves Metrics, mmbbl, 2011-2015 15 Table 8: Energy XXI Ltd., Crude Oil Production and Reserves, By Country/Region, mmbbl, 2011-2015 17 Table 9: Energy XXI Ltd., Crude Oil Reserve Changes, mmbbl, 2011-2015 18 Table 10: Energy XXI Ltd., Natural Gas Production and Reserves Metrics, bcf, 2011-2015 19 Table 11: Energy XXI Ltd., Natural Gas Production and Reserves, By Country/Region, bcf, 2011-2015 21 Table 12: Energy XXI Ltd., Natural Gas Reserve Changes, bcf, 2011-2015 22 Table 13: Energy XXI Ltd., Oil and Gas Reserves Life Index, Years, 2011-2015 23 Table 14: Energy XXI Ltd., Oil and Gas Reserves Life Index, By Country/Region, Years, 2011-2015 25 Table 15: Energy XXI Ltd., Upstream Capital Expenditure, US$ mil, 2011-2015 26 Table 16: Energy XXI Ltd., Proved and Unproved Acquisition Costs, By Country/Region, US$ mil, 2011-2015 28 Table 17: Energy XXI Ltd., Exploration and Development Costs, By Country/Region, US$ mil, 2011-2015 30 Table 18: Energy XXI Ltd., Reserves Replacement, Finding and Development Costs, Finding Cost and Proved Acquisition Costs Per boe, US$/boe, 2011-2015 32 Table 19: Energy XXI Ltd., Reserves Replacement, Finding and Development Costs, Finding Cost and Proved Acquisition Costs Per boe, US$/boe, By Country/Region, 2011-2015 34 Table 20: Energy XXI Ltd., Oil and Gas Production Replacement Ratio, %, 2011-2015 35 Table 21: Energy XXI Ltd., 3-Year Wt.Avg. Oil and Gas Production Replacement Ratio, By Country/Region, %, 2011-2015 40 Table 22: Energy XXI Ltd., Revenue and Expenses, US$ mil, 2011-2015 41 Table 23: Energy XXI Ltd., Revenue and Expenses, By Country/Region, US$ mil, 2011-2015 46 Table 24: Energy XXI Ltd., Oil and Gas Revenue and Expenses, US$/boe, 2011-2015 47 Table 25: Energy XXI Ltd., Oil and Gas Revenue and Expenses, US$/boe, By Country/Region, 2011-2015 51 Table 26: Energy XXI Ltd., Oil and Gas Performance Metrics, 2011-2015 52 Table 27: Energy XXI Ltd., Land Holdings (Developed and Undeveloped Acreage), Acres, 2011-2015 53 Table 28: Energy XXI Ltd., Land Holdings (Developed and Undeveloped Acreage), By Country/Region, Acres, 2011-2015 56 Table 29: Energy XXI Ltd., Producible Oil and Gas Wells, 2011-2015 57 Table 30: Energy XXI Ltd., Producible Oil and Gas Wells, By Country/Region, 2011-2015 61 Table 31: Energy XXI Ltd., Exploratory and Developed Wells, 2011-2015 62 Table 32: Energy XXI Ltd., Exploratory and Developed Wells, By Country/Region, 2011-2015 63 List of Figures Figure 1: Energy XXI Ltd., Share Price Performance, USD/Share, 2011-2015 8 Figure 2: Energy XXI Ltd., Key Valuation Metrics, EV/Production ($/boed), EV/Proved Reserve (US$/boe), 2011-2015 9 Figure 3: Energy XXI Ltd., Total Crude Oil and Natural Gas, Production and Reserves, mmboe, 2011-2015 10 Figure 4: Energy XXI Ltd., Total Oil & Gas Reserves, End of Period, By Country/Region, mmboe, 2011-2015 12 Figure 5: Energy XXI Ltd., Total Oil & Gas Production, By Country/Region, mmboe, 2011-2015 12 Figure 6: Energy XXI Ltd., Total Crude Oil and Natural Gas Reserve Changes, mmboe, 2015 14 Figure 7: Energy XXI Ltd., Crude Oil Production and Reserves Metrics, mmbbl, 2011-2015 15 Figure 8: Energy XXI Ltd., Oil Reserves, End of Period, By Country/Region, mmbbl, 2011-2015 16 Figure 9: Energy XXI Ltd., Oil Production, By Country/Region, mmbbl, 2011-2015 16 Figure 10: Energy XXI Ltd., Crude Oil Reserve Changes, mmbbl, 2015 18 Figure 11: Energy XXI Ltd., Natural Gas Production and Reserves Metrics, bcf, 2011-2015 19 Figure 12: Energy XXI Ltd., Gas Reserves, End of Period, By Country/Region, bcf, 2011-2015 20 Figure 13: Energy XXI Ltd., Gas Production, By Country/Region, bcf, 2011-2015 20 Figure 14: Energy XXI Ltd., Natural Gas Reserve Changes, bcf, 2015 22 Figure 15: Energy XXI Ltd., Oil and Gas Reserves Life Index, Years, 2011-2015 23 Figure 16: Energy XXI Ltd., Gas Reserve Life Index, By Country/Region, Years, 2011-2015 24 Figure 17: Energy XXI Ltd., Oil & Gas Reserve Life Index, By Country/Region, Years, 2011-2015 24 Figure 18: Energy XXI Ltd., Oil Reserve Life Index, By Country/Region, Years, 2011-2015 25 Figure 19: Energy XXI Ltd., Upstream Capital Expenditure, US$ mil, 2011-2015 26 Figure 20: Energy XXI Ltd., Proved Acquisition Costs, By Country/Region, US$ mil, 2011-2015 27 Figure 21: Energy XXI Ltd., Unproved Acquisition Costs, By Country/Region, US$ mil, 2011-2015 27 Figure 22: Energy XXI Ltd., Development Costs, By Country/Region, US$ mil, 2011-2015 29 Figure 23: Energy XXI Ltd., Exploration Costs, By Country/Region, US$ mil, 2011-2015 29 Figure 24: Energy XXI Ltd., 3-Year Wt.Avg., Reserves Replacement, Finding and Development Costs, Finding Cost and Proved Acquisition Costs Per boe, US$/boe, 2011-2015 31 Figure 25: Energy XXI Ltd., Oil & Gas Finding & Development Cost/boe, 3-Year Average, By Country/Region, US$/boe, 2011-2015 33 Figure 26: Energy XXI Ltd., Oil & Gas Finding Cost per boe, 3-Year Average, By Country/Region, US$/boe, 2011-2015 33 Figure 27: Energy XXI Ltd., Reserve Replacement Cost per boe, 3-Year Average, By Country/Region, US$/boe, 2011-2015 34 Figure 28: Energy XXI Ltd., 3-Year Wt.Avg., Oil and Gas Production Replacement Ratio, %, 2011-2015 35 Figure 29: Energy XXI Ltd., 3-Year Wt. Avg. Gas F&D Production Replacement, By Country/Region, %, 2011-2015 37 Figure 30: Energy XXI Ltd., 3-Year Wt. Avg. Gas RRC Production Replacement, By Country/Region, %, 2011-2015 37 Figure 31: Energy XXI Ltd., 3-Year Wt. Avg. Oil & Gas F&D Production Replacement, By Country/Region, %, 2011-2015 38 Figure 32: Energy XXI Ltd., 3-Year Wt. Avg. Oil & Gas RRC Production Replacement, By Country/Region, %, 2011-2015 38 Figure 33: Energy XXI Ltd., 3-Year Wt. Avg. Oil F&D Production Replacement, By Country/Region, %, 2011-2015 39 Figure 34: Energy XXI Ltd., 3-Year Wt. Avg. Oil RRC Production Replacement, By Country/Region, %, 2011-2015 39 Figure 35: Energy XXI Ltd., Revenue and Expenses, US$ mil, 2011-2015 41 Figure 36: Energy XXI Ltd., Depreciation, Depletion and Amortization From Upstream Oil & Gas Operations, By Country/Region, US$ mil, 2011-2015 42 Figure 37: Energy XXI Ltd., Income Tax Provision (Benefit) From Upstream Oil & Gas Operations, By Country/Region, US$ mil, 2011-2015 42 Figure 38: Energy XXI Ltd., Net Income/ Loss From Upstream Oil & Gas Operations, By Country/Region, US$ mil, 2011-2015 43 Figure 39: Energy XXI Ltd., Oil & Gas Revenue, By Country/Region, US$ mil, 2011-2015 43 Figure 40: Energy XXI Ltd., Profit (loss) Before Taxation From Upstream Oil & Gas Operations, By Country/Region, US$ mil, 2011-2015 44 Figure 41: Energy XXI Ltd., Production Costs, By Country/Region, US$ mil, 2011-2015 44 Figure 42: Energy XXI Ltd., Total Expenses From Upstream Oil & Gas Operations, By Country/Region, US$ mil, 2011-2015 45 Figure 43: Energy XXI Ltd., Oil and Gas Revenue and Expenses, US$/boe, 2011-2015 47 Figure 44: Energy XXI Ltd., Income Tax/(Benefit) per boe, By Country/Region, US$/boe, 2011-2015 48 Figure 45: Energy XXI Ltd., Lifting Cost per boe, By Country/Region, US$/boe, 2011-2015 48 Figure 46: Energy XXI Ltd., Annual Net Income per boe, By Country/Region, US$/boe, 2011-2015 49 Figure 47: Energy XXI Ltd., Oil & Gas Revenue per boe, By Country/Region, US$/boe, 2011-2015 49 Figure 48: Energy XXI Ltd., Total DD&A per boe, By Country/Region, US$/boe, 2011-2015 50 Figure 49: Energy XXI Ltd., Total Revenue per boe, By Country/Region, US$/boe, 2011-2015 50 Figure 50: Energy XXI Ltd., Oil and Gas Performance Metrics, 2011-2015 52 Figure 51: Energy XXI Ltd., Land Holdings (Developed and Undeveloped Acreage), Acres, 2011-2015 53 Figure 52: Energy XXI Ltd., Total Gross Undeveloped Acreage, By Country/Region, Acres, 2011-2015 54 Figure 53: Energy XXI Ltd., Total Net Undeveloped Acreage, By Country/Region, Acres, 2011-2015 54 Figure 54: Energy XXI Ltd., Total Gross Developed Acreage, By Country/Region, Acres, 2011-2015 55 Figure 55: Energy XXI Ltd., Total Net Developed Acreage, By Country/Region, Acres, 2011-2015 55 Figure 56: Energy XXI Ltd., Producible Oil and Gas Wells, 2011-2015 57 Figure 57: Energy XXI Ltd., Gross Productive Gas Wells, By Country/Region, Number, 2011-2015 58 Figure 58: Energy XXI Ltd., Gross Productive Oil & Gas Wells, By Country/Region, Number, 2011-2015 58 Figure 59: Energy XXI Ltd., Gross Productive Oil Wells, By Country/Region, Number, 2011-2015 59 Figure 60: Energy XXI Ltd., Net/Gross Oil & Gas Ratio, By Country/Region, %, 2011-2015 59 Figure 61: Energy XXI Ltd., Net Productive Gas Wells, By Country/Region, Number, 2011-2015 60 Figure 62: Energy XXI Ltd., Net Productive Oil & Gas Wells, By Country/Region, Number, 2011-2015 60 Figure 63: Energy XXI Ltd., Net Productive Oil Wells, By Country/Region, Number, 2011-2015 61 Figure 64: Energy XXI Ltd., Exploratory and Developed Wells, 2011-2015 62