Changes

| Residual || Migrated hydrocarbons || A discontinuous phase of oil or gas which formed as a result of a breached or leaky trap

| Residual || Migrated hydrocarbons || A discontinuous phase of oil or gas which formed as a result of a breached or leaky trap

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| Dissolved gas || Gas present in the [[petroleum system || Gas exsolving from formation water from pressure release

| Dissolved gas || Gas present in the [[petroleum system]] || Gas exsolving from formation water from pressure release

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| In kerogen || Oil or gas present in [[source rock]] || Oil liberated from kerogen in the [[Petroleum generation|oil generation]] phase

| In kerogen || Oil or gas present in [[source rock]] || Oil liberated from kerogen in the [[Petroleum generation|oil generation]] phase

==Residual shows==

==Residual shows==

Residual hydrocarbons occur as dead oil or as water displacement residual hydrocarbons. Dead oil forms as a result of water washing, thermal cracking, or [http://www.oiltracers.com/services/exploration-geochemistry/oil-biodegradation.aspx biodegradation]. Water displacement residual hydrocarbons form in reservoirs as a result of a leaky or breached trap or as a result of production.

Residual hydrocarbons occur as dead oil or as water displacement residual hydrocarbons. Dead oil forms as a result of water washing, thermal cracking, or [[biodegradation]]. Water displacement residual hydrocarbons form in reservoirs as a result of a leaky or breached trap or as a result of production.

==Dissolved-gas shows==

==Dissolved-gas shows==