What did Petroleum Documentation and Early Use look like?

Petroleum appears as a black-brown viscous liquid seeping from the ground or associated with natural gas. In Yan Prefecture (Shaanxi), Shen Kuo observed locals collecting petroleum for lamps and ink-making.

How did Petroleum Documentation and Early Use work?

Petroleum seeps to the surface → collected → directly burned for lighting (producing heavy soot) → Shen Kuo collected it → distilled/burned to collect the soot (carbon black) → made ink → quality superior to pine-soot ink.

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石油记载与利用

Petroleum Documentation and Early Use

Shen Kuo first named '石油' (petroleum, literally 'rock oil') in his Dream Pool Essays, accurately predicting it 'would greatly prevail in the world hereafter,' and practically applied it as raw material for ink-making and as fuel.

石油记载

Scientific Principle

Petroleum geology: thermal degradation of organic matter generates hydrocarbons that migrate along fractures to the surface, forming oil seeps. Carbon black production: incomplete combustion yields ultrafine carbon particles.

石油记载与利用

Petroleum Documentation and Early Use

Scientific Principle

Related · 宋代