what is conventional hydrocarbons
2. Geological characteristics of conventional hydrocarbon accumulation in a trap. Conventional hydrocarbon accumulation is the key to traditional petroleum geology and usually refers to an individual hydrocarbon accumulation in a single trap with a uniform pressure system and oilâwater contact.f there is only oil (gas) in the trap, it is called an oil (gas) pool, whereas if there are both oil and gas, it is called a petroleum pool. A conventional hydrocarbon accumulation is a three-dimensional (3D) geological entity with clear boundaries.