physics property of nature gas at high pressure Xuanqi zhang Petroleum engineering college
physics property of nature gas at high pressure Xuanqi zhang Petroleum engineering college
油藏物理学一天然气的高压物桂 1 basic concept of natural gas composition:Natural gas is a mixture of low molecular weight alkane and a small amount of non- hydrocarbon gas. ●Weight composition G M:% ∑M, ●volume composition V= ∑V moore composition N% ∑N, MV N;is respectively molecular weight, volume and mole fraction of component i
油藏物理学——天然气的高压物性 1 basic concept of natural gas composition： Natural gas is a mixture of low molecular weight alkane and a small amount of nonhydrocarbon gas. ● Weight composition % i i i M M G ● volume composition % i i i V V V ● moore composition % i i i N N Y Mi、Vi、Ni is respectively molecular weight, volume and mole fraction of component i
油藏物理学一天然气的高压物桂 2 classification on natural gas by reservoir:gas of gas reservoir,gas of oil reservoir,gas of gas condensate reservoir and gas of coal bed by component:wet gas and dry gas by sulfur:acid gas (>1g/m3s )and net gas (<1gm3s)
油藏物理学——天然气的高压物性 2 classification on natural gas ● by sulfur：acid gas (>1g/m3 s ) and net gas (<1g/m3 s ) ● by reservoir：gas of gas reservoir, gas of oil reservoir, gas of gas condensate reservoir and gas of coal bed. ● by component: wet gas and dry gas
油藏物理学一天然气的高压物桂 3 molecular weight of natural gas Molecular weight of natural gas equal to a molar mass of natural gas in standard conditions.That is, M=∑Y,M,) Ma≈29(28.96) i=l Y;、M;一mole fraction and molecular weight of component i
油藏物理学——天然气的高压物性 3 molecular weight of natural gas Molecular weight of natural gas equal to a molar mass of natural gas in standard conditions. That is, n i M Yi Mi 1 ( ) Mair 29（28.96） Yi、Mi — mole fraction and molecular weight of component i
油藏物理学一天然气的高压物桂 4 relative density Gas density:g=m /v Where /cm2 or Kg/m3; m一gor Kg; V一cm3orm3
油藏物理学——天然气的高压物性 4 relative density Gas density：ρg= m /ν Where ρ g— g/cm2 or Kg/m3； m — g or Kg； V — cm3 or m3