This phenomenon is of great importance for lubricating oils. Vicosity is a fluids resistance to flow and can be valued as dynamic (absolute) or kinematic. Oil formation usually takes place in very fine-grained sedimentary rocks known as black shales. The viscosity of a liquid is a function of temperature and it decreases as the temperature goes up. One billion cubic metres (BCM) is equivalent to 35.31 cubic feet. In a highly simplified explanation, over time, the heat and pressure converted the carbohydrates into hydrocarbons. Kinematic viscosity is measured in the time it takes for a specific volume of oil to flow through a special device called a capillary tube. Means a billion cubic metres and is generally used to measure natural gas. When the plants and small organisms (plankton) that fed on them died off, the sediments containing their remains were buried at the bottom of inland seas. Although variously defined, the upper limit for heavy oil is 22 API gravity with a viscosity of 100 cp (centipoise). This combination occurs so frequently in arguments of fluid dynamics that it has been given a special namekinetic viscosity. The formation of heavy oil and bitumen, like other forms of petroleum, originated with plant life millions of years ago. Most require heat or dilution to flow into a well or through a pipeline. Heavy oils typically are not recoverable in their natural state through a well or by ordinary production methods. Natural bitumen, also known as oil sands, shares the characteristics of heavy oil but is even more dense and viscous - with a viscosity greater than 10,000 cP. stroke diesel engines are designed to operate on up to 700 mm2/s (cSt) at 50C viscosity heavy fuel oil (ISO 8217:2017 RMK 700 grade) if sufficient fuel. Light oil is characterized by an API gravity of at least 22°, and extra-heavy oil has an API gravity of less than 10°. In comparison with heavy oil, light or 'conventional' oil flows naturally and can be pumped without being heated or diluted. The estimation of the oil viscosity below the bubble-point pressure is a two-step process.

Definition of viscosity in oil and gas