When this substance is low in sulfur, it is described as "sweet".
The amount of this substance in a given deposit is quantified by STOIIP. Benthic foraminiferan fossils can be used to date deposits of this substance. Kerogen is a precursor to it. In general, it is found within some kind of trap, often structural, like an anticline or a salt dome. When this substance is low in sulfur, it is described as "sweet". Refining it typically involves cracking. One technique for extracting this substance from low-porosity rocks is to induce a fracture using a proppant and then deploy a horizontal wellbore to extract it. That technique is hydrofracking. Bitumen is a type of it that can be extracted from namesake sands. For 10 points, name this liquid fossil fuel.
The amount of this substance in a given deposit is quantified by STOIIP.
petroleum [or crude oil; generously accept natural gas]