is a sequence of creation, analysation and expansion. The provides building blocks for every other career to specifically carried out its work. deals with the production of and . is a liquid mixture originated in geographical improvement in the Earth’s surface. It is refined to numerous form of for various aspects. is mixture of numerous number of hydrocarbons, which chiefly found molecules such as alkanes, cycloalkanes, aromatic hydrocarbons, or complicated chemical like asphaltenes.