Abstract
The paper presents the problem of collectors secondary porosity, which is the main component of the total effective porosity. Different aspects of this problem are considered: the origin and distribution of secondary porosity in the rock, the dependency between the structure of the pore space and its filtration properties, the formation of hydrocarbons deposits at great depths, the role of post-sedimentation processes in the formation of secondary porosity and fractures, as well as the issue of secondary porosity prediction and its role in prospecting secondary oil and gas reservoirs.