Abstract
Nowadays, it is vitally necessary that conceptually new methods be used in petroleum geology. The aim of this paper is to outline new trends and approaches in petroleum geology; to substantiate the necessity for rehabilitation cycles in the process of oilfield development, especially at its active stage; to define the perturbation threshold for equilibrium of a fluid-saturated system. In this paper, an empirical estimation is given of the value of critical perturbation of an equilibrium fluid-saturated system during the oilfield development, equal to formation depression of 5-8 MPa.
 The author’s conclusion is that at present efforts should be focused on the efficient science-based development of the active oilfields in order to produce the residual (hard-to-extract) oil in a soft, sparing and non-damaging way, as well as on discovering new hydrocarbon accumulations, including secondary ones, throughout the whole stratigraphic section, with all depth horizons and various rock-fluid associations, in regions where a well-developed diversified infrastructure is already available. The use of rehabilitation cycles will make it possible to restore the energy potential of the stratum and filtration properties of the rock. In the long run, it will provide for an increased longevity of the object and higher final oil recovery.
Highlights
Making the giant leap in Petroleum Geosciences!.1.1
During the development of an oilfield, the perturbation threshold for breaking the equilibrium of the oilfield as a fluid-saturated system can be defined with the value of formation depression; there are strong reasons to estimate this critical value of formation depression as 5-8 MPa [8]
These methods make it possible to distinctly determine the highly productive foci during exploration and production of oilfields
Summary
As to genesis of hydrocarbons, there are various authoritative positions [12]. Owing to his petroleum longevity, the author has left behind the classical organic hypothesis, it was his personal discovery in 1958 when a specific oil-source rock («Bazhenov suite») was first distinguished in the Upper Jurassic system of West Siberia, based on the study of test wells. It was stated in the author’s Ph.D. thesis in 1962. The author holds to a quite different scientific paradigm, which does not imply strict adherence to any of the existing oil origin hypotheses
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