Effect of pore attribute on pore complexity and its impact on rock quality

[摘要] Several studies have shown that pore complexity of rock is the main factor causing establishment of rock units with certain dynamic behaviors that are different from each other (rock type). Generally, modified of Kozeny-Carmen equations supported by petrographic data are used to identify the rock units. However, petrographic data is not always available, so another approach is needed to explain the pore complexity of rock. This study is intended to obtain another approach that can be used to describe the effect of pore complexity on rock quality (HFU). The pore complexity of the rock is expressed in the form of combination of shape factor with tortuosity (Fst) and the specific surface area(S). This study uses 120 carbonate rock samples data. These data include porosity and permeability obtained from routine core analysis. By using the method of hydraulic flow unit, rock samples can be grouped into several HFU where each HFU has its own porosity and permeability relationship. This study shows that 1 HFU defined by the hydraulic flow unit is characterized by a unique value of spesific surface area but has a wide range ofFsτ. It can be concluded that the specific surface area is the dominant factor that distinguishes 1 hydraulic flow unit to another.

[发布机构] Petroleum Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti, Indonesia^1;Geological Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti, Indonesia^2

[效力级别] 矿业工程

[关键词] Carbonate rock;Dominant factor;Dynamic behaviors;Hydraulic flow units;Rock quality;Routine core analysis;Shape factor;Surface area