Choosing the optimal strategy for residual hard-to-recover oil reserves confined to low-permeability heterogeneous reservoirs extracting

Author:

,Grishchenko V. A., ,Mukhametshin V. Sh., ,Kuleshova L.S., ,Garipov A. R., ,Chemezov D. P.,

Abstract

The problem considered in the article concerns the oil reserves development complexity from deposits characterized by degraded reservoir porosity and permeability – low permeability and connectivity of reservoirs, high fragmentation, variability, and discontinuity of sand bodies. On the example of one of the facilities with a significant areal distribution, the issue of choosing the development system optimal characteristics based on the production efficiency analysis, as well as the proxy modeling results is studied. As a result, it was found that for the conditions considered, the sealing of the production well grid has a positive effect on the oil extraction process, while maintaining the flooding system rigidity is a prerequisite for maintaining the production efficiency. Optimal for the reserves development of the conditions considered is a system of horizontal producing and directional injection wells. Based on the conclusions made, a technique has been formed for potential sites for the grid compaction, which allows to increase both the degree and the rate of residual reserves productionl. Keywords: low-permeable formations, hard-to-recover reserves, drilling, oil recovery coefficient.

Publisher

Oil Gas Scientific Research Project Institute

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