A mixture of hydrocarbons that stay A fluid mixture of mid-density and/or high-density alkanes that stays liquid or semi-solid which stay liquid at both subsurface reservoir and at separator at Normal Surface Conditions (NTP).
The usual composition ranges from C1 to C32 and API gravity is between 4° and 42° (Specific Gravity is 0.816 ÷ 1.0).).
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