That quantity of petroleum which is estimated, on a given date, to be contained in known accumulations, plus those quantities already produced therefrom. Discovered petroleum-initially-in-place can be subdivided into commercial and sub-commercial quantities (equivalent to discovered resources).
A petroleum reservoir whose existence has been determined by the drilling of a well. Petroleum quantities that are discovered are “known accumulations” or “known reservoirs”.
Such as in the oil and gas reserves disclosure
A pipe through which fluids can be discharged, such as for the discharge of water after it has been used to cool a power station into the sea
Dirty cargoes comprise crude oil or heavy, viscous petroleum products (heavy fuel oil, for example, which coats the sides of the cargo tanks). Those petroleum products which leave significant amounts of residue in tanks. Generally applies to crude oil and residual fuel oil. Vessels carrying dirty cargoes may be referred to as dirty vessels
Sedimentary rock with clay minerals in pores, even small quantities of which can reduce porosity and permeability
