Methods of organic geochemistry of naphthides and organic substances of rocks are widely used not only in the search for oil and gas. In the last decade, they have become more and more actively used in the practice of field development. In international practice this direction is known as "reservoir geochemistry" or oil and gas geochemistry and includes a wide range of studies in the field of bitumen science of rocks and geochemistry of hydrocarbon systems. In particular, the ratio of naphthides and bitumens in the development of deposits determines the sources of deposit formation, the paths and distances of primary and secondary migration of hydrocarbons, the specifics of changes in their structure and properties over time at the inflows of accumulations and in a production well.
