Mechanisms of Mass Exchange Between Light Oiland Petroleum Gas in Low-Permeability Reservoir Development Process


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Abstract

It is shown that associated petroleum gas (APG) and the product of intrastratal transformation of air (by high-pressure air injection technology) are suitable for oil displacement from low-permeability, high-temperature light oil reservoirs. It was found that APG and air are effective gaseous agents miscible with oil, which are similar in oil-displacing properties. The minimum miscibility pressure (MMP) determination data are presented for an Upper Jurassic oil-APG system. The miscibility in the oil-APG system was achieved by the multicontact mechanism of interaction between oil and enriched gas. A new method is proposed for graphical determination of MMP as a function of gas breakthrough due to pressure, and a method for enhancing gas impact efficiency and for achieving miscibility at a pressure below the MMP, which consists in injection of a liquefied gas prefringe or a wide fraction of hydrocarbons, is validated.

About the authors

P. A. Gushchinu

Noncommercial Partnership among Gubkin University Technopark; I. M. Gubkin Russian State University of Oil and Gas

Author for correspondence.
Email: guschin.p@mait.ru
Russian Federation, Moscow; Moscow

A. N. Cheremisin

Skolkov Institute of Science and Technology

Email: guschin.p@mait.ru
Russian Federation, Scolkovo

N. G. Glavnov

Gazpromneft Scientific and Technical Center Ltd

Email: guschin.p@mait.ru
Russian Federation, Moscow

P. M. Zobort

Skolkov Institute of Science and Technology

Email: guschin.p@mait.ru
Russian Federation, Scolkovo

N. A. Svarovskaya

I. M. Gubkin Russian State University of Oil and Gas

Email: guschin.p@mait.ru
Russian Federation, Moscow

V. N. Khlebnikov

I. M. Gubkin Russian State University of Oil and Gas

Email: guschin.p@mait.ru
Russian Federation, Moscow

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