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Modeling of reservoir pressures in heterogeneous porous layers of oil-gas deposits
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 16th International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2017, Volume 2017, p.1 - 6
Abstract
On the base of nonstationary piezoconductivity equation, describing press distribution in the heterogeneous deformable porous layers with the help of elaborated combined method, which unites finite element and finite differences method, and allows calculating inhomogeneous distributions of the porous environment parameters we have carried out computer modeling of the reservoir pressures in the heterogeneous porous layers of oil-gas deposits. General analysis of the obtained results shows that reservoir pressures distribution essentially depends on irregularity of bedding collector rocks and irregularity of their collector characteristics. Therefore, irregularity of the reservoir pressures distribution is mainly defined by geometric stratigraphic inclined irregularity of bedding collector rocks and distinctions of their collector characteristics in different directions. In the case of oil-gas deposits, exploitation with penetrated borders, the high bottom well pressure can be supported during ten years. However, it is necessary to take into account the fact of water owerflowing of oil-gas deposits. In the case of oil-gas deposits with unpenetrated borders, the noticeable exhaustion of the deposits becomes during one year. At that, exhaustion velocity depends on initial conditions of oil-gas deposits (their sizes and average reservoir pressures) and exploitation conditions.