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Multi-scale reconstruction of vuggy carbonates by pore network modeling and image-based technique
Citation: If you use this package in any publications please help us by citing the following article:
Sadeghnejad, S., & Gostick, J. (2019). Multi-scale reconstruction of vuggy carbonates by pore network modeling and image-based technique, SPE Journal (In Press).
To reconstruct a bi-modal vuggy porous medium, an algorithm based on coupling the PNM approach with image-based network techniques was implemented. A lattice-based network image (LNI) of a vugular network along with a conventional PNM was used to evaluate the network properties in parallel. LNI is a lattice network that consists of the secondary porosity (i.e., vugs) of the network. The LNI is laid on top of the base PNM (i.e., matrix porosity) which contains the microporous structure of the porous medium. Implementing such a twin LNI-PNM approach has considerable advantages. For example, the connection among the vuggy pores of the LNI with other micro-pores of the PNM can properly and efficiently be calculated (e.g., petrophysical properties of overlapping vugs). Moreover, big networks consisting of many million pores and vugs can be feasibly reproduced by using such a technique. In the first step, the microporous network and vug properties are defined as inputs. The base network (i.e., micro-porous) properties include network size, number of pores, throats, coordination number, the size distribution of pores and throats, etc. The vug properties consist of the total number of vugs in the network and vug diameter distribution. Based on the input data, the base PNM and its twin LNI are generated. The base PNM consists of only conventional micro-pores with a predefined pore size distribution.
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The code can be downloaded from here.