Resumo

TARAZONA-LIZCANO, Yessenia; VARGAS-LOPEZ, María Camila  e  VELANDIA, Francisco. Quantitative analysis of the fracture systems and groundwater implications in the south zone of the Mesa de Los Santos, Santander - Colombia. Bol. geol. [online]. 2021, vol.43, n.3, pp.107-123.  Epub 01-Abr-2022. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v43n3-2021005.

The quantitative analysis of the fracture system is the use of statistical methods and procedures to determine the structures geometry and the parameters that describe the fracturing such as intensity, density, and fracture length with the purpose of identifying the most favorable areas for infiltration and fluid storage in a specific area. To implement this analysis in the south of the Mesa de Los Santos, the FracPaQ software was used, which measures and quantifies fracture patterns in two dimensions based on digital data obtain from outcrops photograph. This data is shown in range and dispersion maps to correlate with geologic attributes taken from each station. As additional information, a preliminary analysis of the flow of fluids is presented in graphs of connectivity and permeability in the direction of the flow. This quantification allowed establishing that the NW-SE faults stand out in the spatial arrangement and opening of the fractures, acting as the main corridors for the circulation of fluids in the southeast of the Mesa de Los Santos. We propose the zone influenced by the La Mojarra Fault as a sector of high secondary porosity favorable for infiltration and subsurface flow associated with the upper member of the Los Santos Formation.

Palavras-chave : Statistical analysis; Fracture patterns; FracPaQ; Circular windows; Fluid flow.

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