期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：186
期号：3
页码：012003
DOI：10.1088/1755-1315/186/3/012003
语种：English
出版社：IOP Publishing
摘要：Due to the effect of dissolution and the influence of stratigraphic structure, carbonate rocks' fracture system is generally developed and the reservoir has a strong heterogeneity. Some fractures exist in some low-permeability carbonate rock matrixes, but no fracture system is formed. It is difficult to describe the seepage water flooding characteristics of these rocks with the traditional single medium model and dual medium model. The purpose of this paper is to establish a new carbonate rock seepage model to describe this kind of carbonate rock seepage. By introducing the fracture density to describe the proportion of fractures in the entire infiltration process, the incompletely developed fracture system can be considered as equivalent medium system. The research shows: the apparent permeability of core increases nonlinearly with the increase of fracture density. When the matrix-type carbonate reservoirs are driven by water, the period of non-aqueous oil recovery is long, and the production declines slowly after seeing water. In matrix-fractured carbonate reservoirs, water recovery period is the longest and the output decreased rapidly after seeing water. In fractured carbonate reservoirs, the period of non-aqueous oil recovery is short and the production declines rapidly.
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