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Jesús Díaz-Curiel; Bárbara Biosca; María Jesús Miguel. Erratum to: Geophysical estimation of permeability in sedimentary media with porosities from 0 to 50%. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 2021, 76, 34 .
AMA StyleJesús Díaz-Curiel, Bárbara Biosca, María Jesús Miguel. Erratum to: Geophysical estimation of permeability in sedimentary media with porosities from 0 to 50%. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles. 2021; 76 ():34.
Chicago/Turabian StyleJesús Díaz-Curiel; Bárbara Biosca; María Jesús Miguel. 2021. "Erratum to: Geophysical estimation of permeability in sedimentary media with porosities from 0 to 50%." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 76, no. : 34.
The tortuosity of porous solids has been widely used as a basic concept in understanding the fluid flow capacity of these media. Starting from a geometric expression of the tortuosity, different relationships have been developed over time to estimate it from different perspectives as hydraulic, electrical, and molecular diffusion, making necessary an exhaustive analysis of these developments. In this study, evidences for the lack of the true hydrodynamic sense of the conventional expression of tortuosity are shown. As a first sign of its failures, the disparity of results between the different relationships of tortuosity–porosity derived from this conventional expression is shown. Next, the presentation of several examples directly shows that the value obtained with that conventional expression is the same in cases where the actual tortuosity is obviously different. Likewise, a routine physical analysis of the flow in this study shows that the use of the capillary analogue is erroneous for one-dimensional flow analyses. Another inconsistency has been encountered in the widely used equality between the volumetric porosity and the product of free cross-sectional area by the length representing the path of the fluid through the pores. The last key showing the deficiencies of these estimations of the tortuosity is the constraint of the use of constant section ducts in the electrical analogy. As a new expression of tortuosity, an alternative ratio is proposed which can be included in known hydraulic and electrical relationships, in the same way than the conventional tortuosity. This tortuosity ratio constitutes a rethinking of the knowledge and understanding of flow in granular porous media.
J. Díaz-Curiel; B. Biosca; L. Arévalo-Lomas; M. J. Miguel. Failure of the Conventional Expression of Tortuosity in Granular Porous Solids. Surveys in Geophysics 2021, 42, 943 -960.
AMA StyleJ. Díaz-Curiel, B. Biosca, L. Arévalo-Lomas, M. J. Miguel. Failure of the Conventional Expression of Tortuosity in Granular Porous Solids. Surveys in Geophysics. 2021; 42 (4):943-960.
Chicago/Turabian StyleJ. Díaz-Curiel; B. Biosca; L. Arévalo-Lomas; M. J. Miguel. 2021. "Failure of the Conventional Expression of Tortuosity in Granular Porous Solids." Surveys in Geophysics 42, no. 4: 943-960.
This work presents a case study using electrical resistivity tomography at a site mainly affected by the presence of residual lindane coming from a close landfill constructed by an old pesticide manufacturer. In addition, the landfill also collected chlorinated contaminants derived from the same industry. Lindane itself is a highly toxic contaminant that in small concentrations constitutes a high risk to health, which together with the other compounds, makes it a site with very hazardous characteristics. The geological distribution, formed by a complex detrital deposited over a marls substrate, is known from the existing network of monitoring wells. A geophysical prospecting survey consisting of seven electrical tomography profiles was carried out in the site. The lateral and vertical geometry of the contaminant plume was established, and the preferential flow directions were inferred by means of the resistivity sections obtained. Combining this information with analytical data from water samples, an empirical relationship between the conductivity value and the dissolved chloride content was developed, and the distribution of the concentration of chlorinated contaminants in the surface aquifer by isochloride sections was obtained. The results obtained are a very useful tool as a preliminary stage to remediation trials.
Bárbara Biosca; Lucía Arévalo-Lomas; Miguel Izquierdo-Díaz; Jesús Díaz-Curiel. Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography. Journal of Applied Geophysics 2021, 191, 104358 .
AMA StyleBárbara Biosca, Lucía Arévalo-Lomas, Miguel Izquierdo-Díaz, Jesús Díaz-Curiel. Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography. Journal of Applied Geophysics. 2021; 191 ():104358.
Chicago/Turabian StyleBárbara Biosca; Lucía Arévalo-Lomas; Miguel Izquierdo-Díaz; Jesús Díaz-Curiel. 2021. "Detection of chlorinated contaminants coming from the manufacture of lindane in a surface detritic aquifer by electrical resistivity tomography." Journal of Applied Geophysics 191, no. : 104358.
An openly accessible cellular automaton has been developed to predict the preferential migration pathways of contaminants by surface runoff in abandoned mining areas. The site where the validation of the results of the Contaminant Mass Transfer Cellular Automaton (CMTCA) has been carried out is situated on the steep flank of a valley in the Spanish northwestern region of Asturias, at the foot of which there is a village with 400 inhabitants, bordered by a stream that flows into a larger river just outside the village. Soil samples were collected from the steep valley flank where the mine adits and spoil heaps are situated, at the foot of the valley, and in the village, including private orchards. Water and sediment samples were also collected from both surface water courses. The concentration of 12 elements, including those associated with the Cu-Co-Ni ore, were analyzed by ICP-OES (Perkin Elmer Optima 3300DV, Waltham, MA, USA) and ICP-MS (Perkin Elmer NexION 2000, Waltham, MA, USA). The spatial representation of the model’s results revealed that those areas most likely to be crossed by soil material coming from source zones according to the CMTCA exhibited higher pollution indexes than the rest. The model also predicted where the probabilities of soil mass transfer into the stream were highest. The accuracy of this prediction was corroborated by the results of trace element concentrations in stream sediments, which, for elements associated with the mineral paragenesis (i.e., Cu, Co, Ni, and also As), increased between five- and nine-fold downstream from the predicted main transfer point. Lastly, the river into which the stream discharges is also affected by the mobilization of mined materials, as evidenced by an increase of up to 700% (in the case of Cu), between dissolved concentrations of those same elements upstream and downstream of the confluence of the river and the stream.
Fernando Barrio-Parra; Miguel Izquierdo-Díaz; Luis Jesús Fernández-Gutiérrez Del Álamo; Bárbara Biosca; Eduardo De Miguel. Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas. International Journal of Environmental Research and Public Health 2020, 17, 5117 .
AMA StyleFernando Barrio-Parra, Miguel Izquierdo-Díaz, Luis Jesús Fernández-Gutiérrez Del Álamo, Bárbara Biosca, Eduardo De Miguel. Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas. International Journal of Environmental Research and Public Health. 2020; 17 (14):5117.
Chicago/Turabian StyleFernando Barrio-Parra; Miguel Izquierdo-Díaz; Luis Jesús Fernández-Gutiérrez Del Álamo; Bárbara Biosca; Eduardo De Miguel. 2020. "Modelling the Transference of Trace Elements between Environmental Compartments in Abandoned Mining Areas." International Journal of Environmental Research and Public Health 17, no. 14: 5117.
Herein, a new approach for widening the applicability of seismic refraction profiles in shallow foundation designs is presented. To provide quantitative geotechnical information, a relationship was established to estimate the allowable bearing pressure of cohesionless soils according to the results of seismic refraction measurements, without the conventional uncertainty. The developed procedure was employed in the geomechanical characterization survey for the construction of a helipad at the centre of the Iberian Peninsula; here, seismic refraction tomography was used to compute sections of the velocity–depth curves using the wavepath eikonal traveltime inversion method. When the shear- and compressional-wave one-off velocities are transformed into dynamic moduli through conventional elastic equations, dynamic moduli images that provide quasi-continuous information on soil deformation properties can be generated. These results were combined with the data from dynamic probing super-heavy tests to evaluate the stress–strain moduli relationships, and the dynamic moduli were used to determine the bearing capacity. Furthermore, a general equation for the allowable bearing pressure in granular soils is proposed; this equation contains a new variable that depends on the grain size grading of the zone. Using this, the distribution of the allowable bearing pressure can be used as a criterion to detect spatial variability and problematic zones. The proposed methodology provides more deformation properties of subsoil; thus, it reduces the costs of ground-testing techniques as the boreholes can be better located according to the project foundation requirements.
Jesús Díaz-Curiel; Bárbara Biosca; Lucía Arévalo-Lomas; Sandra Rueda-Quintero. Improved use of seismic profiles to estimate allowable pressure in granular soils: Application to quaternary deposits with different gradings. Journal of Applied Geophysics 2020, 175, 103988 .
AMA StyleJesús Díaz-Curiel, Bárbara Biosca, Lucía Arévalo-Lomas, Sandra Rueda-Quintero. Improved use of seismic profiles to estimate allowable pressure in granular soils: Application to quaternary deposits with different gradings. Journal of Applied Geophysics. 2020; 175 ():103988.
Chicago/Turabian StyleJesús Díaz-Curiel; Bárbara Biosca; Lucía Arévalo-Lomas; Sandra Rueda-Quintero. 2020. "Improved use of seismic profiles to estimate allowable pressure in granular soils: Application to quaternary deposits with different gradings." Journal of Applied Geophysics 175, no. : 103988.
This communication presents the approaches set up for processing spinner flowmeter well logs in vertical wells with a single fluid phase, which is the most widely used in assessing wells productivity. These focus on improving the pipe hydraulics relationships so that the different fluid inputs throughout the well can be quantified. Since vertical flow inside wells varies with depth between laminar flows (very low Reynolds number, i.e. Re < 103) and turbulent (Re > 4·103) the aim has been to reduce the uncertainty in the transition interval. Starting from bibliographical data and/or well-known formulas for laminar and for turbulent flow, several continuous relationships have been developed for any regime: 1) an expression for the radial distribution of velocity inside the pipeline (velocity profile) was developed. 2) A relationship between the average velocity and the velocity at the axis (velocity factor) was created. 3) A third equation was generated to obtain the friction factor in smooth pipes (and starting from this, a new explicit equation for rough pipes). The purpose has been to have a set of empirical expressions of easy and continuous application for any regime, as an alternative to the use of computer simulations.
Jesús Díaz-Curiel; María J. Miguel; Natalia Caparrini; Bárbara Biosca; Lucía Arévalo-Lomas. Improving basic relationships of pipe hydraulics. Flow Measurement and Instrumentation 2020, 72, 101698 .
AMA StyleJesús Díaz-Curiel, María J. Miguel, Natalia Caparrini, Bárbara Biosca, Lucía Arévalo-Lomas. Improving basic relationships of pipe hydraulics. Flow Measurement and Instrumentation. 2020; 72 ():101698.
Chicago/Turabian StyleJesús Díaz-Curiel; María J. Miguel; Natalia Caparrini; Bárbara Biosca; Lucía Arévalo-Lomas. 2020. "Improving basic relationships of pipe hydraulics." Flow Measurement and Instrumentation 72, no. : 101698.
Nowadays, the growing concern about the environmental problems affecting the subsoil has focussed efforts on the detection and characterization of contaminated sites through geophysical prospecting methods. In the present study, a case of a contaminated site by hydrocarbons and their study by means of time domain-induced polarization tomography is presented. The response in chargeability of porous media due to this kind of pollutant allows its delimitation using this method. However, one of the limitations for the application of this technique is the presence of lithologies that contain electro-metallic salts. These salts can produce anomalies of chargeability and mask those due to nonaqueous phase liquids. The studies were conducted in an area contaminated by fuel leaks from supply tanks within a train maintenance facility. Those leaks occurred while the tanks were in use, but since their dismantling, the leak stopped. The geology of the area presented strong heterogeneities and the access was limited by train tracks. In order to locate and characterize the contaminant plume, measurements of resistivity and chargeability were carried out. A grid of monitoring wells in this area was also available from which information about free-phase pollutants was obtained, and a new drilling was carried out to verify an unexpected anomaly. The results obtained show that the location of the plume by the geophysical techniques employed can lead to ambiguity, as an anomaly that does not correspond to contaminated areas appeared but to the presence of clays rich in electro-metallic components such as Mg, Fe, Mn and Al.
Bárbara Biosca; Lucía Arévalo-Lomas; Fernando Barrio-Parra; Jesús Díaz-Curiel. Application and limitations of time domain-induced polarization tomography for the detection of hydrocarbon pollutants in soils with electro-metallic components: a case study. Environmental Monitoring and Assessment 2020, 192, 1 -11.
AMA StyleBárbara Biosca, Lucía Arévalo-Lomas, Fernando Barrio-Parra, Jesús Díaz-Curiel. Application and limitations of time domain-induced polarization tomography for the detection of hydrocarbon pollutants in soils with electro-metallic components: a case study. Environmental Monitoring and Assessment. 2020; 192 (2):1-11.
Chicago/Turabian StyleBárbara Biosca; Lucía Arévalo-Lomas; Fernando Barrio-Parra; Jesús Díaz-Curiel. 2020. "Application and limitations of time domain-induced polarization tomography for the detection of hydrocarbon pollutants in soils with electro-metallic components: a case study." Environmental Monitoring and Assessment 192, no. 2: 1-11.
This paper presents a series of empirical expressions to correct the total natural gamma ray log due to well environmental factors. This correction is focussed on improving the quantification of 40K, given its application in the computation of the clay content of the different layers crossed during drilling. To date, there are no analytical relationships that make this correction and continuously consider the different diameters of the many existing sondes. There are also no functions that continuously take into account the different combinations of media interspersed between the well walls and the sonde (casing, drill pipe, gravel pack, cement, etc.) for different measurement modes and systems, such as wireline, while drilling. To solve these shortcomings, the relationships developed in this work have cited, in addition to the different well diameters and mud densities, the diameter of the sonde and the environmental parameters as variables with any value and in any possible combination. The obvious advantage of these parametric equations is that they can easily be entered as a subroutine into any code. Unlike the existing correction methods, i.e., empirical charts and curves obtained by simulation codes based on the Monte Carlo method, the relationships developed take into account the variation of the build-up effect that the radiation undergoes as it travels from layers with a certain radioactive emission to the sonde. In addition, another difference is that the relationships generated in this work include the internal diameter of the sonde between its outer walls and the cylindrical radiation detector glass. Starting from the general relationships that consider the attenuation and build-up effects of gamma radiation when passing through a medium, the methodology consisted of establishing an effective distance for the cylindrical geometry in which the source is the well wall, particularized for each effect and each type of tool (centred and eccentred). The resulting correction factors have been contrasted with the most recognized experimental charts in the field of well logging, obtaining a very high correlation and an average deviation of around 1.5%.
J. Díaz-Curiel; M.J. Miguel; Bárbara Biosca; R. Medina. Environmental correction of gamma ray logs by geometrical / empirical factors. Journal of Petroleum Science and Engineering 2018, 173, 462 -468.
AMA StyleJ. Díaz-Curiel, M.J. Miguel, Bárbara Biosca, R. Medina. Environmental correction of gamma ray logs by geometrical / empirical factors. Journal of Petroleum Science and Engineering. 2018; 173 ():462-468.
Chicago/Turabian StyleJ. Díaz-Curiel; M.J. Miguel; Bárbara Biosca; R. Medina. 2018. "Environmental correction of gamma ray logs by geometrical / empirical factors." Journal of Petroleum Science and Engineering 173, no. : 462-468.
To this date, estimation of hydraulic transmissivity with magnetic resonance sounding (MRS) requires transmissivity values from pumping tests in nearby wells in order to determine a calibration constant from the relationship between both types of data. The use of this technique is limited due to the fact that reported values of this calibration constant are highly variable, even within the same type of aquifer. In order to minimise this shortcoming, a new methodology, that has been developed and presented here, is used to estimate the transmissivity of detrital aquifers with heterogeneous behaviour based only on the results obtained by MRS. The exponents applied to decay time and free porosity used in the expression to compute MRS transmissivity, have conventionally been fixed values. In contrast, the work presented here aims to improve the applicability of this technique by using a variable exponent for free porosity in each type of aquifer, obtained only from MRS results. In order to achieve this goal, previously published MRS data from four detrital aquifers in the Iberian Peninsula have been used and a relationship between the porosity exponent and a function of decay times and free porosities has been developed. This approach eliminates the need to drill and perform pumping tests in additional boreholes, which has cost and time implications, once the correct expression is determined for a given type of aquifer. The range of values thus obtained for the porosity exponent is similar to that reported in the literature. The deviation of the results obtained with this methodology regarding the results of pumping test is similar to the deviation with conventional process. This suggests that proposed methodology is appropriate for the aquifers considered, and the approach may be expanded to study other types of aquifers. The drawbacks of the proposal related to the conventional equivalence are explored. This article is protected by copyright. All rights reserved
Jesús Díaz-Curiel; Bárbara Biosca; Georgina Doñate-Matilla; Sandra Rueda-Quintero. Estimation of hydraulic transmissivity from MRS by varying the porosity exponent in detrital aquifers of the Iberian Peninsula. Near Surface Geophysics 2018, 16, 401 -410.
AMA StyleJesús Díaz-Curiel, Bárbara Biosca, Georgina Doñate-Matilla, Sandra Rueda-Quintero. Estimation of hydraulic transmissivity from MRS by varying the porosity exponent in detrital aquifers of the Iberian Peninsula. Near Surface Geophysics. 2018; 16 (4):401-410.
Chicago/Turabian StyleJesús Díaz-Curiel; Bárbara Biosca; Georgina Doñate-Matilla; Sandra Rueda-Quintero. 2018. "Estimation of hydraulic transmissivity from MRS by varying the porosity exponent in detrital aquifers of the Iberian Peninsula." Near Surface Geophysics 16, no. 4: 401-410.
Water is one of the receptors most affected by the impacts caused, especially in the case of mining sulphides and, to a lesser extent, of coal. Acid Mine Drainage (AMD) is the main problem associated with these mining operations, producing extremely high impacts, and in many cases irreversible impacts, until now. A new concept of mining can make this activity compatible with the environmental preservation and also to the recovery of the environment affected by the old mining operations that today are in the process of reopening. This new concept implicates the paradigm of Circular Mining as a derivative of the concept of Circular Economy, considered as a strategy that aims to reduce both the entry of materials and the production of virgin waste, closing the “loops” or economic and ecological flows of resources. The present work discusses the paradigm of Circular Mining, focused on the Iberian Pyrite Belt, one of the most paradigmatic metallogenetic regions in the world. Based on some examples, expeditious calculations show the possibility of recovering base metals as well as strategic elements from acid mine drainage, thus obtaining important economic assets.
J. A. Grande; M. Santisteban; Maria Luisa DE LA Torre; J. C. Fortes; Eduardo De Miguel; J. Curiel; J. M. Dávila; Bárbara Biosca. The paradigm of Circular Mining in the world: the Iberian Pyrite Belt as a potential scenario of interaction. Environmental Earth Sciences 2018, 77, 391 .
AMA StyleJ. A. Grande, M. Santisteban, Maria Luisa DE LA Torre, J. C. Fortes, Eduardo De Miguel, J. Curiel, J. M. Dávila, Bárbara Biosca. The paradigm of Circular Mining in the world: the Iberian Pyrite Belt as a potential scenario of interaction. Environmental Earth Sciences. 2018; 77 (10):391.
Chicago/Turabian StyleJ. A. Grande; M. Santisteban; Maria Luisa DE LA Torre; J. C. Fortes; Eduardo De Miguel; J. Curiel; J. M. Dávila; Bárbara Biosca. 2018. "The paradigm of Circular Mining in the world: the Iberian Pyrite Belt as a potential scenario of interaction." Environmental Earth Sciences 77, no. 10: 391.
In this paper, we present a modification of the existing mathematical formulation used to obtain the allowable bearing pressure from dynamic penetration tests in order to extend its applicability to the design of shallow foundations. The conventional relationships adopted to obtain the allowable bearing pressure from penetrometer tests have a discontinuous gradient, and they are limited to a depth less than the footing width. The aim of this work was to find a relationship that permits the estimation of this pressure in cohesionless soils, from the results of dynamic probing super heavy tests, through a single non-piecewise and continuous relationship that remains valid up to depths several times the footing width. This equation was applied as part of the geomechanical characterization survey undertaken for the construction of an elevated helipad in the centre of the Iberian Peninsula. The survey results were considered satisfactory, and the construction was completed without structural problems.
Jesús Díaz-Curiel; Sandra Rueda-Quintero; Bárbara Biosca; Georgina Doñate-Matilla. Advance in the penetrometer test formulation to estimate allowable pressure in granular soils. Acta Geotechnica 2017, 12, 1119 -1127.
AMA StyleJesús Díaz-Curiel, Sandra Rueda-Quintero, Bárbara Biosca, Georgina Doñate-Matilla. Advance in the penetrometer test formulation to estimate allowable pressure in granular soils. Acta Geotechnica. 2017; 12 (5):1119-1127.
Chicago/Turabian StyleJesús Díaz-Curiel; Sandra Rueda-Quintero; Bárbara Biosca; Georgina Doñate-Matilla. 2017. "Advance in the penetrometer test formulation to estimate allowable pressure in granular soils." Acta Geotechnica 12, no. 5: 1119-1127.
Jesús Díaz-Curiel; Bárbara Biosca; María Jesús Miguel. Geophysical Estimation of Permeability in Sedimentary Media with Porosities from 0 to 50%. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 2015, 71, 27 .
AMA StyleJesús Díaz-Curiel, Bárbara Biosca, María Jesús Miguel. Geophysical Estimation of Permeability in Sedimentary Media with Porosities from 0 to 50%. Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles. 2015; 71 (2):27.
Chicago/Turabian StyleJesús Díaz-Curiel; Bárbara Biosca; María Jesús Miguel. 2015. "Geophysical Estimation of Permeability in Sedimentary Media with Porosities from 0 to 50%." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 71, no. 2: 27.
The application of magnetic resonance sounding (MRS) to near-surface studies, especially in the vadose zone, requires a significant improvement in the signal-to-noise ratio. Small dimension loops with several turns must be used in order to achieve a high vertical and lateral resolution. This increases the loop impedance, limiting the current intensity and increasing the criticalness in the requirement to produce excitation pulses with a good shape. Due to the high current intensity required to create the excitation field, the tuning system used in MRS equipment is achieved selecting the capacitance values amongst several fixed configurations in discrete steps that depend on the loop characteristics and the emission frequency. When the equipment works with high inductances, this procedure implies a wide range in the tuning frequency that corresponds to a given value of capacitance. For this reason, it is necessary to change other system characteristics in order to achieve an optimal resonance fitting to the Larmor frequency. Moreover, a way to improve the excitation field in the very shallow zone of the subsurface and to achieve the dipolar approximation of the electromagnetic field of the loop in this zone, would be to increase the distance from the plane of the antenna to the surface of the ground. In this paper, several processes that have been developed as an aid to optimize the recording parameters for shallow MRS investigations are presented: 1) a methodology to improve the tuning through an optimized configuration of the transmitter antenna is proposed, 2) a quantitative index has been derived to evaluate the quality of the excitation pulse, as an aid to decide whether the design of the antenna should be modified and 3) a portable and low-cost device to lift the antenna above the ground has been designed and constructed in order to increase the excitation of shallower water. These developments have been carried out using a NumisLITE Iris Instrument. Field experiments have shown the validity of the proposed theoretical and field techniques.
Jesús Díaz-Curiel; Bárbara Biosca; Lucia Arevalo-Lomas; Juan L. Plata. Development of field techniques for improving MRS quality in shallow investigations. Near Surface Geophysics 2010, 9, 113 -122.
AMA StyleJesús Díaz-Curiel, Bárbara Biosca, Lucia Arevalo-Lomas, Juan L. Plata. Development of field techniques for improving MRS quality in shallow investigations. Near Surface Geophysics. 2010; 9 (2):113-122.
Chicago/Turabian StyleJesús Díaz-Curiel; Bárbara Biosca; Lucia Arevalo-Lomas; Juan L. Plata. 2010. "Development of field techniques for improving MRS quality in shallow investigations." Near Surface Geophysics 9, no. 2: 113-122.