Publications

Digital rock physics can be applied to calculate or estimate the porosity and permeability of reservoir rock without damaging the physical condition of the rock itself. The rock is scanned and saved in a digital form, which can then be used for any purpose. The data can also be used to analyze the geometrical structure of the rock. Overall, the sample in digital form is much more efficient and detailed in structure. Three imaging modes are microscopic analysis, the micro-CT scan, and the scanning electron microscopy. Information obtained from the three methods is used as modeling parameters. The models based on the characteristics of the sandstone from the Ngrayong Formation are calculated and simulated to see the effect of various conditions of the samples. The models are constructed based on their grain shape: spherical, ellipsoidal, and polygon or irregular shape. Four parameters compare models to the sample: grain size distribution, pore size distribution, degree of permeability anisotropy, and grain shape. All three models are compared with the sample by matching the similarity of the structural properties and fluid flow. Based on the result, only one model shows a similarity to the sample: the polygon shape. The polygon model shows a similarity to the sample, while the other models show significant discrepancies compared with the sample. Even though one parameter has a similar value between the model and sample, the three other parameters have the contrast value that helps improve the design of the model. In conclusion, three different models based on the characteristics of the sample could not be used to represent the rock. However, this research can be used to develop a more detailed model to represent a real rock.