share and per share amounts included in this report have been restated for all periods presented to reflect this stock split . 53 business environment and industry outlook our operating results and those of the oil and gas industry as a whole are heavily influenced by commodity prices . oil and gas prices and differentials may fluctuate significantly , generally as a result of changes in supply and demand and other market-related variables . these and other factors make it impossible to predict realized prices reliably . much of the global exploration and production industry has been challenged at recent price levels , putting pressure on the industry 's ability to generate positive cash flow and access capital . average oil prices continued the decline that began in the last half of 2014 into the first quarter of 2016. in mid-2016 , global oil prices began to recover from the apparent low point of this commodity cycle . the recovery further strengthened following the production cuts announced at the november 2016 meeting of the organization of the petroleum exporting countries ( opec ) . while global oil prices improved modestly through the end of 2016 and began to trade in a narrower range , daily average prices were still lower for the full year of 2016 compared to 2015. natural gas liquids ( ngls ) prices improved relative to crude oil prices throughout 2016 due to tighter supplies , the strength of industry exports and higher contract prices on natural gasoline . full year average natural gas prices were lower in 2016 than in 2015. however , prices rebounded modestly in the second half of the year due to lower production , higher demand and warmer weather . california natural gas differentials for the second half of the year also improved due to reduced storage in the state following a third-party facility incident that occurred in late 2015. the following table presents the average daily brent oil , wti oil and nymex gas prices for each of the years ended december 31 , 2016 , 2015 and 2014 : replace_table_token_21_th oil prices and differentials will continue to be affected by a variety of factors , including consumption patterns , inventory levels , global and local economic conditions , the actions of opec and other significant producers and governments , actual or threatened production and refining disruptions , currency exchange rates , worldwide drilling and exploration activities , the effects of conservation , weather , geophysical and technical limitations , refining and processing disruptions , transportation bottlenecks and other matters affecting the supply and demand dynamics for oil , technological advances , regional market conditions , transportation capacity and costs in producing areas and the effect of changes in these variables on market perceptions . we currently sell all of our crude oil into the california refining markets , which we believe have offered relatively favorable pricing compared to other u.s. regions for similar grades . california is heavily reliant on imported sources of energy , with approximately 65 % of the oil consumed in recent years imported from outside the state . a vast majority of the imported oil arrives via supertanker , mostly from foreign locations . as a result , california refiners have typically purchased crude oil at international waterborne-based prices . we believe that the limited crude transportation infrastructure from other parts of the country to california will continue to contribute to higher realizations than most other u.s. oil markets for comparable grades . we also opportunistically consider foreign markets to improve our margins . prices and differentials for ngls are related to the supply and demand for the products making up these liquids . some of them more typically correlate to the price of oil while others are affected by natural gas prices as well as the demand for certain chemical products for which they are used as feedstock . in addition , infrastructure constraints magnify pricing volatility . natural gas prices and differentials are strongly affected by local market fundamentals , as well as availability of transportation capacity from producing areas . capacity influences prices because california imports about 90 % of its natural gas from other parts of the u.s. as a result , we typically enjoy favorable pricing since we can deliver our gas for much lower transportation costs . due to much lower levels of natural gas production compared to our oil production , the changes in natural gas prices have a smaller impact on our operating results . 54 higher natural gas prices have a net positive effect on our operating results . in addition to selling natural gas , we also use gas for our steamfloods and power generation . as a result , the positive impact of higher prices is partially offset by higher operating costs . conversely , lower natural gas prices generally have a net negative effect on our operations , but lower the cost of our steamflood projects and power generation . our earnings are also affected by the performance of our processing and power generation assets . we process our wet gas to extract ngls and other natural gas byproducts . we then deliver dry gas to pipelines and separately sell the ngls . the efficiency with which we extract liquids from the wet gas stream affects our operating results . additionally , we provide part of the electricity from our elk hills power plant to reduce operating costs to elk hills and nearby fields and increase reliability . the remaining electricity is sold to the grid and a utility under a contract that includes a capacity charge . the price we obtain for our excess power impacts our earnings but generally by an insignificant amount . story_separator_special_tag the following represents key metrics of our oil and gas operations , excluding certain corporate items and asset impairments , on a per boe basis for the years ended december 31 , 2016 , 2015 and 2014 : replace_table_token_34_th ( a ) for 2016 , the amount excludes unusual and infrequent charges related to severance and early retirement costs associated with field personnel totaling $ 0.12 per boe . for 2015 , the amount excludes charges of $ 0.31 per boe related to early retirement and severance costs . for 2014 , the amount excludes charges of $ 0.10 per boe related to spin-off and transition-related costs . ( b ) for 2016 , the amount excludes net unusual and infrequent gains of $ 0.35 that include refunds partially offset by plant turnaround charges and other items . for 2015 , the amount excludes charges related to the write-down of certain assets and rig termination charges of $ 1.42 per boe . for 2014 , the amount excludes charges related to rig termination charges and spin-off and transition-related charges of $ 0.97 per boe . year ended december 31 , 2016 vs. 2015 oil and gas net sales decreased 24 % , or $ 513 million , in 2016 compared to 2015 , due to reductions of approximately $ 282 million and $ 181 million from lower oil prices and volumes , respectively ; $ 28 million and $ 26 million from lower natural gas prices and volumes , respectively ; $ 14 million from lower ngl volumes ; and an increase of $ 18 million from higher ngl prices . the lower realized oil prices reflected a 16 % decrease in global oil prices . our realized oil prices in 2016 and 2015 also included $ 77 million and $ 78 million of cash generated from our hedging program , respectively . daily oil and gas production volumes averaged 140,000 boe in 2016 , compared with 160,000 boe in 2015 , representing a 12.5 % year-over-year decline rate , consistent with our estimated overall annual base decline rate . the 2016 production was negatively impacted by 1,000 boe per day due to the pscs in our long beach operations . excluding this psc effect , our year-over-year production decline would have been under 12 % . average oil production decreased by 13 % , or 13,000 barrels per day , to 91,000 barrels per day in 2016 compared to 2015. ngl production decreased by 11 % to 16,000 barrels per day . natural gas production decreased by 14 % to 197,000 mmcf per day , consistent with our focus on oil-based projects . the overall production decline continued to reflect our decision to withhold development capital and selectively defer workover and downhole maintenance activity in the early part of the year . derivative losses were $ 206 million in 2016 , compared to gains of $ 133 million in 2015. of the change , $ 335 million was due to the valuation of outstanding derivative contracts at the end of 2016 and $ 4 million was the result of lower gains from cash settlements . overall , the 2016 derivative losses are primarily a function of the higher commodity price curve at the end of 2016 compared to the curve when the derivatives were implemented . 63 production costs were $ 800 million or $ 15.61 per boe in 2016 , compared to $ 951 million or $ 16.30 per boe in 2015 , resulting in a 16 % reduction on an absolute dollar basis . of the absolute dollar reduction , approximately 25 % related to lower energy costs , largely resulting from lower natural gas prices . the balance , or 75 % of the reduction , came from ongoing cost-reduction initiatives which reduced costs across our operations in all categories including surface operations , downhole maintenance and labor costs . our general and administrative expenses were lower in 2016 compared to 2015 on a total dollar and per boe basis , reflecting continued employee and contractor cost-reduction initiatives . severance and early retirement costs of $ 20 million and $ 67 million were included in general and administrative expenses in 2016 and 2015 , respectively . the non-cash portion of general and administrative expenses , comprising equity compensation and a portion of pension costs , was approximately $ 25 million and $ 30 million in 2016 and 2015 , respectively . dd & a expense decreased 44 % , or $ 445 million , in 2016 compared to 2015 , primarily due to a $ 376 million decrease in the dd & a rate that resulted from asset impairments in the fourth quarter of 2015 , and an approximately $ 73 million decrease attributable to lower volumes . at year-end 2015 , we performed impairment tests with respect to our proved and unproved properties triggered by the sharp drop in oil prices in the fourth quarter of 2015 , resulting in pre-tax asset impairment charges of $ 4.9 billion . taxes other than on income , which include ad valorem taxes , greenhouse gas emissions costs and production taxes , decreased 20 % , or $ 36 million , in 2016 compared to 2015 , reflecting lower property taxes assessed in the lower price environment . exploration expense decreased 36 % , or $ 13 million , in 2016 compared to 2015 , due to reduced lease rentals that we negotiated during the year and lower exploration activity . interest and debt expense , net , of $ 328 million in 2016 , compared to $ 326 million in 2015 , reflected higher interest rates on our new debt , increased amortization of deferred financing costs including a $ 12 million write-off of the deferred financing costs associated with the tender for our notes during 2016. offsetting these effects were $ 71 million of amortization of the deferred gains from our december 2015 debt exchange and

cash flow analysis replace_table_token_36_th ( a ) we define adjusted ebitdax as earnings before interest expense ; income taxes ; depreciation , depletion and amortization ; exploration expense ; and other unusual and infrequent items . our management believes adjusted ebitdax provides useful information in assessing our financial condition , results of operations and cash flows and is widely used by the industry , the investment community and our lenders . while adjusted ebitdax is a non-gaap measure , the amounts included in the calculation of adjusted ebitdax were computed in accordance with gaap . this measure is a material component of certain of our financial covenants under our first-lien , first-out credit facilities and is provided in addition to , and not as an alternative for , income and liquidity measures calculated in accordance with gaap . certain items excluded from adjusted ebitdax are significant components in understanding and assessing our financial performance , such as our cost of capital and tax structure , as well as the historic cost of depreciable and depletable assets . adjusted ebitdax should be read in conjunction with the information contained in our financial statements prepared in accordance with gaap . the following table sets forth a reconciliation of the gaap measure of net cash provided by operating activities to the non-gaap financial measure of adjusted ebitdax : replace_table_token_37_th year ended december 31 , 2016 vs. 2015 our net cash provided by operating activities in 2016 decreased by $ 273 million from $ 403 million in 2015 to $ 130 million in 2016. the decrease reflected lower revenues of approximately $ 521 million , primarily due to lower commodity prices and volumes , net


 Write a concise suspicious activity report of the following text delimited by triple backquotes. Return your response as a formal report which covers the key points highlighting the location,dates,entity names and account holder information in chronological order of the text.
     ```cash flow analysis replace_table_token_36_th ( a ) we define adjusted ebitdax as earnings before interest expense ; income taxes ; depreciation , depletion and amortization ; exploration expense ; and other unusual and infrequent items . our management believes adjusted ebitdax provides useful information in assessing our financial condition , results of operations and cash flows and is widely used by the industry , the investment community and our lenders . while adjusted ebitdax is a non-gaap measure , the amounts included in the calculation of adjusted ebitdax were computed in accordance with gaap . this measure is a material component of certain of our financial covenants under our first-lien , first-out credit facilities and is provided in addition to , and not as an alternative for , income and liquidity measures calculated in accordance with gaap . certain items excluded from adjusted ebitdax are significant components in understanding and assessing our financial performance , such as our cost of capital and tax structure , as well as the historic cost of depreciable and depletable assets . adjusted ebitdax should be read in conjunction with the information contained in our financial statements prepared in accordance with gaap . the following table sets forth a reconciliation of the gaap measure of net cash provided by operating activities to the non-gaap financial measure of adjusted ebitdax : replace_table_token_37_th year ended december 31 , 2016 vs. 2015 our net cash provided by operating activities in 2016 decreased by $ 273 million from $ 403 million in 2015 to $ 130 million in 2016. the decrease reflected lower revenues of approximately $ 521 million , primarily due to lower commodity prices and volumes , net
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 Suspicious Activity Report : share and per share amounts included in this report have been restated for all periods presented to reflect this stock split . 53 business environment and industry outlook our operating results and those of the oil and gas industry as a whole are heavily influenced by commodity prices . oil and gas prices and differentials may fluctuate significantly , generally as a result of changes in supply and demand and other market-related variables . these and other factors make it impossible to predict realized prices reliably . much of the global exploration and production industry has been challenged at recent price levels , putting pressure on the industry 's ability to generate positive cash flow and access capital . average oil prices continued the decline that began in the last half of 2014 into the first quarter of 2016. in mid-2016 , global oil prices began to recover from the apparent low point of this commodity cycle . the recovery further strengthened following the production cuts announced at the november 2016 meeting of the organization of the petroleum exporting countries ( opec ) . while global oil prices improved modestly through the end of 2016 and began to trade in a narrower range , daily average prices were still lower for the full year of 2016 compared to 2015. natural gas liquids ( ngls ) prices improved relative to crude oil prices throughout 2016 due to tighter supplies , the strength of industry exports and higher contract prices on natural gasoline . full year average natural gas prices were lower in 2016 than in 2015. however , prices rebounded modestly in the second half of the year due to lower production , higher demand and warmer weather . california natural gas differentials for the second half of the year also improved due to reduced storage in the state following a third-party facility incident that occurred in late 2015. the following table presents the average daily brent oil , wti oil and nymex gas prices for each of the years ended december 31 , 2016 , 2015 and 2014 : replace_table_token_21_th oil prices and differentials will continue to be affected by a variety of factors , including consumption patterns , inventory levels , global and local economic conditions , the actions of opec and other significant producers and governments , actual or threatened production and refining disruptions , currency exchange rates , worldwide drilling and exploration activities , the effects of conservation , weather , geophysical and technical limitations , refining and processing disruptions , transportation bottlenecks and other matters affecting the supply and demand dynamics for oil , technological advances , regional market conditions , transportation capacity and costs in producing areas and the effect of changes in these variables on market perceptions . we currently sell all of our crude oil into the california refining markets , which we believe have offered relatively favorable pricing compared to other u.s. regions for similar grades . california is heavily reliant on imported sources of energy , with approximately 65 % of the oil consumed in recent years imported from outside the state . a vast majority of the imported oil arrives via supertanker , mostly from foreign locations . as a result , california refiners have typically purchased crude oil at international waterborne-based prices . we believe that the limited crude transportation infrastructure from other parts of the country to california will continue to contribute to higher realizations than most other u.s. oil markets for comparable grades . we also opportunistically consider foreign markets to improve our margins . prices and differentials for ngls are related to the supply and demand for the products making up these liquids . some of them more typically correlate to the price of oil while others are affected by natural gas prices as well as the demand for certain chemical products for which they are used as feedstock . in addition , infrastructure constraints magnify pricing volatility . natural gas prices and differentials are strongly affected by local market fundamentals , as well as availability of transportation capacity from producing areas . capacity influences prices because california imports about 90 % of its natural gas from other parts of the u.s. as a result , we typically enjoy favorable pricing since we can deliver our gas for much lower transportation costs . due to much lower levels of natural gas production compared to our oil production , the changes in natural gas prices have a smaller impact on our operating results . 54 higher natural gas prices have a net positive effect on our operating results . in addition to selling natural gas , we also use gas for our steamfloods and power generation . as a result , the positive impact of higher prices is partially offset by higher operating costs . conversely , lower natural gas prices generally have a net negative effect on our operations , but lower the cost of our steamflood projects and power generation . our earnings are also affected by the performance of our processing and power generation assets . we process our wet gas to extract ngls and other natural gas byproducts . we then deliver dry gas to pipelines and separately sell the ngls . the efficiency with which we extract liquids from the wet gas stream affects our operating results . additionally , we provide part of the electricity from our elk hills power plant to reduce operating costs to elk hills and nearby fields and increase reliability . the remaining electricity is sold to the grid and a utility under a contract that includes a capacity charge . the price we obtain for our excess power impacts our earnings but generally by an insignificant amount . story_separator_special_tag the following represents key metrics of our oil and gas operations , excluding certain corporate items and asset impairments , on a per boe basis for the years ended december 31 , 2016 , 2015 and 2014 : replace_table_token_34_th ( a ) for 2016 , the amount excludes unusual and infrequent charges related to severance and early retirement costs associated with field personnel totaling $ 0.12 per boe . for 2015 , the amount excludes charges of $ 0.31 per boe related to early retirement and severance costs . for 2014 , the amount excludes charges of $ 0.10 per boe related to spin-off and transition-related costs . ( b ) for 2016 , the amount excludes net unusual and infrequent gains of $ 0.35 that include refunds partially offset by plant turnaround charges and other items . for 2015 , the amount excludes charges related to the write-down of certain assets and rig termination charges of $ 1.42 per boe . for 2014 , the amount excludes charges related to rig termination charges and spin-off and transition-related charges of $ 0.97 per boe . year ended december 31 , 2016 vs. 2015 oil and gas net sales decreased 24 % , or $ 513 million , in 2016 compared to 2015 , due to reductions of approximately $ 282 million and $ 181 million from lower oil prices and volumes , respectively ; $ 28 million and $ 26 million from lower natural gas prices and volumes , respectively ; $ 14 million from lower ngl volumes ; and an increase of $ 18 million from higher ngl prices . the lower realized oil prices reflected a 16 % decrease in global oil prices . our realized oil prices in 2016 and 2015 also included $ 77 million and $ 78 million of cash generated from our hedging program , respectively . daily oil and gas production volumes averaged 140,000 boe in 2016 , compared with 160,000 boe in 2015 , representing a 12.5 % year-over-year decline rate , consistent with our estimated overall annual base decline rate . the 2016 production was negatively impacted by 1,000 boe per day due to the pscs in our long beach operations . excluding this psc effect , our year-over-year production decline would have been under 12 % . average oil production decreased by 13 % , or 13,000 barrels per day , to 91,000 barrels per day in 2016 compared to 2015. ngl production decreased by 11 % to 16,000 barrels per day . natural gas production decreased by 14 % to 197,000 mmcf per day , consistent with our focus on oil-based projects . the overall production decline continued to reflect our decision to withhold development capital and selectively defer workover and downhole maintenance activity in the early part of the year . derivative losses were $ 206 million in 2016 , compared to gains of $ 133 million in 2015. of the change , $ 335 million was due to the valuation of outstanding derivative contracts at the end of 2016 and $ 4 million was the result of lower gains from cash settlements . overall , the 2016 derivative losses are primarily a function of the higher commodity price curve at the end of 2016 compared to the curve when the derivatives were implemented . 63 production costs were $ 800 million or $ 15.61 per boe in 2016 , compared to $ 951 million or $ 16.30 per boe in 2015 , resulting in a 16 % reduction on an absolute dollar basis . of the absolute dollar reduction , approximately 25 % related to lower energy costs , largely resulting from lower natural gas prices . the balance , or 75 % of the reduction , came from ongoing cost-reduction initiatives which reduced costs across our operations in all categories including surface operations , downhole maintenance and labor costs . our general and administrative expenses were lower in 2016 compared to 2015 on a total dollar and per boe basis , reflecting continued employee and contractor cost-reduction initiatives . severance and early retirement costs of $ 20 million and $ 67 million were included in general and administrative expenses in 2016 and 2015 , respectively . the non-cash portion of general and administrative expenses , comprising equity compensation and a portion of pension costs , was approximately $ 25 million and $ 30 million in 2016 and 2015 , respectively . dd & a expense decreased 44 % , or $ 445 million , in 2016 compared to 2015 , primarily due to a $ 376 million decrease in the dd & a rate that resulted from asset impairments in the fourth quarter of 2015 , and an approximately $ 73 million decrease attributable to lower volumes . at year-end 2015 , we performed impairment tests with respect to our proved and unproved properties triggered by the sharp drop in oil prices in the fourth quarter of 2015 , resulting in pre-tax asset impairment charges of $ 4.9 billion . taxes other than on income , which include ad valorem taxes , greenhouse gas emissions costs and production taxes , decreased 20 % , or $ 36 million , in 2016 compared to 2015 , reflecting lower property taxes assessed in the lower price environment . exploration expense decreased 36 % , or $ 13 million , in 2016 compared to 2015 , due to reduced lease rentals that we negotiated during the year and lower exploration activity . interest and debt expense , net , of $ 328 million in 2016 , compared to $ 326 million in 2015 , reflected higher interest rates on our new debt , increased amortization of deferred financing costs including a $ 12 million write-off of the deferred financing costs associated with the tender for our notes during 2016. offsetting these effects were $ 71 million of amortization of the deferred gains from our december 2015 debt exchange and

