The structure of residual oil and gas reserves in depleted fields
Today, the problem of ensuring completeness of natural hydrocarbons extraction from subsurface assets belongs to one of the most pressing problems of the oil industry of our country. Potential volumes of oil and gas production are characterized by a complication of conditions of fields’ development, the determining factor of which is a significant worsening of the reserves structure and increasing of hard-to recover reserves portion. This is caused by the entry of a large number of high-yield deposits into the latest stage of their development, characterized by intensive production decline, a sharp increase in water cut and unfavorable qualitative characteristics of the oil reserves of the deposits newly put into development. The paper matches the problem of the methods’ development applied for hydrocarbon residual reserves extraction with the problem of scientific substantiation and development of new effective methods of increasing oil and gas-condensate recovery of formations with hard-to-recover reserves with hard.