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1. n. [Formation Evaluation] The unit of radioactivity used for natural gamma ray logs. This unit is based on an artificially radioactive concrete block at the University of Houston, Texas, USA, that is defined to have a radioactivity of 200 American Petroleum Institute (API) units.
What is API in gas?
The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water: if its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks. It is used to compare densities of petroleum liquids.
What does API mean in oil and gas?
The API (American Petroleum Institute) number is a unique number assigned to every oil and gas well. It is used by agencies to identify and track oil and gas wells.
What API means in oil?
The American Petroleum Institute, API, is a U.S.A trade association for the oil and natural gas industry. The higher the letter, the more recent the technology of the oil.
What is the unit of gamma ray log?
The gamma ray API unit is defined as 1/200 of the difference between the count rate recorded by a logging tool in the middle of the radioactive bed and that recorded in the middle of the nonradioactive bed. While it has served fairly well for more than 40 years, this is a poor way to define a fundamental unit.
What is the formula for API?
The formula for API gravity is API = (141.5/SG) -131.5 where SG is the specific gravity of the petroleum liquid being measured. For example, for an API gravity of 50, add 131.5 to obtain 181.5. Divide 141.5 by (131.5 + API gravity) to obtain the specific gravity of the oil.
What is the difference between API and ASME standards?
Another way to perceive this difference is that the ASME standards are the ones to achieve or design towards while the API standards are the recommended practices but that these practices are not legally binding whereas once the pressure system has been ASME certified the ASME certification is legally binding.
What is API standard for?
API is the worldwide leading standards setting body for the oil and natural gas industry. These include standards, guidelines, and recommended practices regarding safety, equipment, operations, effective water management, spill prevention and environmental protection.
Is higher API oil better?
API gravity of crude oil grades Higher API indicates a lighter (lower density) crude. Lower API indicates a heavier (more dense) crude. Generally, lighter (high API) crudes are more valuable because they yield more high-value light products when run through a refinery.
What is API scale?
The widely used American Petroleum Institute (API) gravity scale is based on pure water, with an arbitrarily assigned API gravity of 10°. (API gravities are unitless and are often referred to in degrees; they are calculated by multiplying the inverse of the specific gravity of a liquid at….
What is the difference between SAE and API?
SAE is the Society Of Automotive Engineers (USA). The SAE rating of an oil is a measure of its viscosity (eg 20W50). API is the American Petroleum Institute. The API rating of an engine oil covers the performance rating of the oil (e.g. SM for petrol, CF for diesel).
What is API SL?
2001 Gasoline Engine Service. Category SL was adopted to describe engine oils for use in 2001. It is for use in service typical of gasoline engines in present and earlier passenger cars, sports utility vehicles, vans and light trucks operating under vehicle manufacturers recommended maintenance procedures.
What does API SM mean?
The codes are as follows: • SN: For vehicles manufactured after 2010. • SM: Vehicles manufactured between 2002-2009. • SJ: Vehicles manufactured before 2001.
What is wireline log?
1. n. [Reservoir Characterization, Formation Evaluation, Drilling] A continuous measurement of formation properties with electrically powered instruments to infer properties and make decisions about drilling and production operations.
What does gamma tool measure?
Gamma ray logging is a method of measuring naturally occurring gamma radiation to characterize the rock or sediment in a borehole or drill hole. It is a wireline logging method used in mining, mineral exploration, water-well drilling, for formation evaluation in oil and gas well drilling and for other related purposes.
What is a neutron log?
Neutron Log is a neutron porosity log which measures the concentration of hydrogen ions in a hydrocarbon formation. When the neutrons collide with the hydrogen nuclei, they deflect back and slow down. These slowed down neutrons are detected and an apparent neutron porosity log is obtained.
How is oil API calculated?
The official formula used to derive the gravity of petroleum liquids from the specific gravity (SG), as follows: API gravity = 141.5/SG – 131.5. RD at 60 o F = 141.5 / (API gravity + 131.5) Barrels of crude oil per metric ton = 1 / [141.5 / (API gravity + 131.5) x 0.159].
How do you convert density to API?
Using the specific gravity of the substance, calculate its API gravity using the following formula: (141.5/specific gravity) – 131.5. For the exemplar substance, its API gravity would be (141.5/0.5) – 131.5 = 151.5.
Why API gravity is important?
The API Gravity of a product is very important in determining the characteristics of the petroleum product. To learn more about this property, let’s apply the AmSpecapproach. API Gravity, or The American Petroleum Institute gravity, is a measure of how light or heavy a petroleum liquid is compared to water.
What is API and ASME?
Well, ASME is actually a construction codes that cover design, fabrication and new construction issues but after they are put in service API codes governs the continued operation, inspection and repairs. After they are placed in service, API 570 governs inspection and repairs.
How many API standards are there?
In its first 100 years, API has developed more than 700 standards to enhance operational safety, environmental protection and sustainability across the industry, especially through these standards being adopted globally.
What is API piping?
API Line Pipe is steel pipe used for the transmission of Oil, Gas and Petroleum Distillates. Line pipes makes the pipeline and is different from casing and tubing. Line Pipes are manufactured as per specifications established by American Petroleum Institute (API).
