Место издания: Florence , Год издания: 2004

A great number of oil fields in different regions of the world are exploited for a long time (up to 30 - 100 years). It is clear that the active part of commercial reserves in them is worked-out, that is why they can be regarded as exhausted. The same can be said about the oil fields with intensive, supercritical mode of operation. For example, 70% of balance reserves of the relatively "new" West Siberian oil-and-gas provinces are difficult for extraction.Oil accumulation is known to be a complex open dynamic system with fast changing parameters, which is determined by the natural rhythm and fluctuation of the intratelluric, surface, cosmic processes and man-caused impact.Hyper intensive (supercritical) fluid withdrawal from the productive bed leads to the drastic disturbance of the filtration capacity parameters of the reservoir. Forced exploitation of oil fields as well as gas deposits caused the situation when the current oil recovery coefficient in Western Siberia even at the final stage of the development term is only about 20-25%, and in the Jurassic deposits - 15%. As a rule, a large depression on the bed (>5 MPa) and a high rate of fluid withdrawal (>2% of the total volume of the extracted active reserves) lead to upsetting of the balanced mode of the filtration channels (fractures) replenishment owing to the fluid saturated porous matrix (solid blocks). When the depression is high, the fixed water detaches from the walls of the pore space of the collector (matrix) and fills up the filtration channels. As a result productivity of the well decreases and watering increases.The "pause" in discovering new large-scale and prolific deposits has dragged for a long time and almost in all regions of Russia and many other countries. Oil and gas industry men have to work with residual reserves difficult to extract at the exhausted deposits. It is in this situation that the only way out is to rehabilitate and revitalize such deposits as a whole or as separate productive zones. This will permit to restore the natural energy parameters of fluid saturated systems and also to provide a balanced proportion of hydrocarbons in fractures and porous matrix. Such individual fluid dynamic cycles based on self-organization of natural systems can result in 2-3 times increase in the volume of the extractable reserves at oilfields.That is why long-term maintaining and improving of active reserves and resources have an acute theoretical and practical significance.