Abstract
The present study was carried out for an oil field located in the upper Magdalena Valley basin, Colombia, in which successful hydraulic fracturing was carried out in a well, which we denote fractured. The main objective is to replicate this technique in an existing well in the same field. For this work, electrical logs from twelve wells, including the fractured well, were analyzed to obtain a correlation between the area of interest, located in the Monserrate Formation, and each of the wells under study. By using gamma ray, resistivity, neutron and density logs, the petrophysical properties were calculated to determine the shale volume, effective porosity, total porosity, water saturation and permeability in each well. Additionally, the production history of each of the wells and the calculations described above were used to suggest a new site where hydraulic fracturing could also be successful. Two candidates were proposed in this study, one based on the similarity of its petrophysical properties, and another based on the consideration of additional production data. Notably, this well stimulation technique has global importance and has produced positive impacts on increased oil production where it has been implemented. The purpose of this study is to provide technical support for the decision to replicate this procedure in a new area of the field.
Highlights
Hydraulic fracturing is a well stimulation technique used in the oil industry to increase production
The present study was carried out for an oil field located in the upper Magdalena Valley basin, Colombia, in which successful hydraulic fracturing was carried out in a well, which we denote fractured
Two candidates were proposed in this study, one based on the similarity of its petrophysical properties, and another based on the consideration of additional production data
Summary
Hydraulic fracturing is a well stimulation technique used in the oil industry to increase production It consists of injecting, at a certain depth, a mixture of fluids at high pressure, composed mostly of water (usually more than 95% of the mixture) and, to a lesser extent, chemicals and proppants that are responsible for keeping fractures open at the end of the procedure (Rutqvist, 2000). At a certain depth, a mixture of fluids at high pressure, composed mostly of water (usually more than 95% of the mixture) and, to a lesser extent, chemicals and proppants that are responsible for keeping fractures open at the end of the procedure (Rutqvist, 2000) This injection method is applied mainly in low-permeability rocks since generating fractures via stimulation can increase the area of rock in contact with high-permeability channels and increase the production of the well (Atkinson, 2015). During the first semester of 2017, a decrease in production was observed, which is why maintenance was performed at the wellhead in July of that same year, which again resulted in an increase
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