Alfonso Aragón-Aguilar - Academia.edu (original) (raw)

Papers by Alfonso Aragón-Aguilar

SSRN Electronic Journal, 2022

Geothermal reservoirs could recover their conditions after a shut-down period by this reason are ... more Geothermal reservoirs could recover their conditions after a shut-down period by this reason are considered as renewable energy. In order to optimize the availability of this source, a sustainable exploitation strategy should always be designed. In contrast with oil systems which are practically isolated, geothermal reservoirs are open systems in which the flow of recharge due to the pressure drops is possible. Due to depth of geothermal reservoirs indirect methods based on monitoring data of wells are used to study their evolution. In this work, models widely used for the analysis of production decline data in oil wells have been adapted in order to include the analysis of geothermal wells. From them, important reservoir information needed to design optimal exploitation strategies is obtained. The analysis of production decline in wells is based either on analytical methods or on type curves fitting approaches. With the decline results of wells and considering their economic limit ...

Tecnologia y Ciencias del Agua, 2014

Geothermal wells ordinarily are exploited using the conventional methods similar to those used in... more Geothermal wells ordinarily are exploited using the conventional methods similar to those used in oil wells in their primary production stage. However after exploitation starts the productivity decline also appears in higher or lower influence rank. The decline in productivity along exploitation is a function of the reservoir properties, mass flow rate extraction and of recharge water entrance, among other parameters. In the analyzed field it was found that the unbalance caused by the higher mass extracted in comparison with the entrance mass by recharge, is one of the reasons for productivity decline in wells. It has been observed a thermodynamic evolution of some of the wells they will achieve conditions of dry steam. In this work, a section was analyzed of a producer Mexican geothermal field, with high temperature logged, small recharge water entrance and additionally low permeability. The analyzed data show quickly the decline in productivity and in some cases lacking flow. This...

Volume 11: Systems, Design, and Complexity, 2014

Measurement of high pressure and high temperature (HPHT) tools is regularly carried out in the hy... more Measurement of high pressure and high temperature (HPHT) tools is regularly carried out in the hydrocarbons sector to determine not only the characteristics and performance of fluids inside the well, but also to evaluate the mechanical condition of the pipes and the automation of production. The mechanical features of these tools are significantly influenced by the mechanical design of the structure, which eventually affects their performance and integrity. This paper describes the design process and the analysis of the structural integrity of a HPHT measuring tool for oil wells in its sensors section. The classical theories of mechanical design and specifications of the ASME boilers and pressure vessels code were used. The study is performed for several operation variables in a numerical model using a commercial code of finite element method to determinate the maximum principal stresses, total displacements and safety factor in the mechanical elements that form the device. The numerical results were compared with the experimental data source from the laboratory tests.Copyright © 2014 by ASME

Geotermia, 2013

Chemical and mineralogical characterization of scales from well 624 from the Cerro Prieto, geothe... more Chemical and mineralogical characterization of scales from well 624 from the Cerro Prieto, geothermal field, B.C.; was carried out by reflected light, X-ray diffraction, scanning electron microscope and microprobe analysis.

… Hidráulica en México, 2002

... Seleccionar todos Título: Evolución isotópica de fluidos de pozos del campo geotérmico de Los... more ... Seleccionar todos Título: Evolución isotópica de fluidos de pozos del campo geotérmico de Los Azufres, Michoacán, México Autores: Barragán Reyes, Rosa María; Portugal Marín, Enrique;Arellano Gómez, Víctor Manuel; Aragón Aguilar, Alfonso; Sandoval Medina, Fernando ...

… Hidráulica en México, 2002

... de la alcalinidad y especies carbónicas en la lluvia por el método de titulación de Gran Auto... more ... de la alcalinidad y especies carbónicas en la lluvia por el método de titulación de Gran Autores: Verma, Mehandra P.; Santoyo Gutiérrez, Sócrates; Aragón, Alfonso; Sánchez, Domingo; Fernández, Ma. Elena; Tello, Enrique; Tovar, Rigoberto; Barrera, Víctor; Barrera, Víctor ...

We use an alternative technique for determining the damage effect besides the traditional transie... more We use an alternative technique for determining the damage effect besides the traditional transient pressure tests. This alternative method uses production data of at least three measurements avoiding the necessity of long time as is required for a pressure test to achieve the pseudo steady state. Another of the advantages of this technique is that there is no fluid discharge to the environment and no consumptions of human and material resources. Also, it avoids extracting the wells from production systems, maintaining their continuous operation. One of the main results of the proposed methodology is the reservoir characterization during its operative life obtained from analysis of wells. During the process, inflow curves were used as a technical tool for determining maximum mass flow rate, reservoir pressure and enthalpy. The application of the knowledge of these parameters besides the reservoir behavior, allows for establishing the exploitation designs for each analyzed production...

Tecnologia y Ciencias del Agua, 1997

espanolEn trabajos previos se obtuvieron numericamente curvas de comportamiento de influjo para p... more espanolEn trabajos previos se obtuvieron numericamente curvas de comportamiento de influjo para productividad masica, IPR (lnflow Performance Relationships) y para productividad termica, GlPR (Geothermal lnflow Performance Relationships) de pozos geotermicos. Las curvas IPR y GlPR relacionan el flujo masico producido en los pozos geotermicos, con la presion y entalpia fluyentes en la intercara pozo-yacimiento, respectivamente. Las curvas obtenidas cubren un amplio rango de propiedades del medio roca-fluido de los yacimientos geotermicos y diferentes etapas de explotacion del mismo. Se consideraron yacimientos hipoteticos de agua pura asi como tambien yacimientos con bioxido de carbono. Adicionalmente, fueron propuestas dos curvas de referencia adimensionales para estimar las productividades de masa (IPR*) y de energia (GIPR*) de pozos geotermicos. En este trabajo se efectua un analisis preliminar de la aplicabilidad de las dos curvas de referencia propuestas, en la estimacion de cur...

Geofisica Internacional, 2012

The inflow curve may be used to determinate the damage effect and wellbore characterization in ge... more The inflow curve may be used to determinate the damage effect and wellbore characterization in geothermal fields. The methodology can be applied for determining damage effect in wells that cannot be retired from continuous exploitation. The skin or damage effect is usually estimated from transient pressure tests which require time. It was found that the damage effect in the wells increases with exploitation time and is related with deterioration of production. Knowledge of damage is needed for taking decisions about operations on the well for enhancement of productivity.

Focusing in the goal to overcome the lack of geothermal projects development in Mexico during the... more Focusing in the goal to overcome the lack of geothermal projects development in Mexico during the past two decades the Inter-American Development Bank (IDB) designed the Program of Risk Transfer and Financing for Geothermal Energy. The objective is to isolate the drilling risk during the geothermal projects development. Besides IDB, participates the Clean Technologies Fund (CTF) along with interaction of Mexican Government Institutions: Ministry of Energy (SENER), Nacional Financiera (Mexican development bank NAFIN) and the National Institute of Electricity and Clean Energies (INEEL). This program will be applied in Mexican projects to promote continuity of geothermal exploration in Mexico. Moreover, it includes financing for private investors for field development until construction in permissioned or concession areas is completed. INEEL acts as the technological arm of IDB and has leaded the two main lines of it: Drilling bidding process and Call for field developers. The bidding ...

Renewable Geothermal Energy Explorations, 2019

A geothermal project constitutes two big stages: the exploration and the exploitation. Each one h... more A geothermal project constitutes two big stages: the exploration and the exploitation. Each one has a single task whose results allow defining the feasibility of a geothermal project, until achieving the construction and operation stage of the power generation plant. The first stage contains the area recognition, its limitation to the target, and elimination of external factors until defining a geothermal zone with characteristics to be commercially exploited. The main studies and analysis that can be applied during the exploration stage are listed, and the major indicator to continue with the project or suspend is the prefeasibility report. The major risks in the exploration stage are due to studies that are carried out on the surface; at this stage, the costs can be considered low. The main results of the exploration are the selection of sites to drill three or four initial wells. Each well provides a direct overview of the reservoir: depth, production thicknesses, thermodynamic parameters, and production characteristics. The drilling of three to four exploratory wells is recommended, as far as there is certainty of the feasibility of the project, and the development of the field begins with drilling of sufficient wells to feed the plant. In this stage, the cost increases, but the risks decrease.

This paper describes a computational tool developed to aid the analysis of chemical, isotopic and... more This paper describes a computational tool developed to aid the analysis of chemical, isotopic and production data of geothermal wells. ANAGEOT is an interactive and user-friendly software that allows quickly and efficient manner, modification, retrieval and visualization of the wide amounts of data involved in the study of reservoirs. ANAGEOT optimizes time and resources, due to high quantity of historical data of most of the wells of various petroleum and geothermal fields which involve information sometimes of very long time periods. The system has the flexibility to work with different fields, considering a database for each one A very important feature of this tool is that the reports, charts and graphs are generated in a way which can be edited at any time. Similarly these can be used as source files for other applications, because they are generated in wide commercial use applications such as Microsoft Word, Excel and Golden Grapher.

SSRN Electronic Journal, 2022

Geothermal reservoirs could recover their conditions after a shut-down period by this reason are ... more Geothermal reservoirs could recover their conditions after a shut-down period by this reason are considered as renewable energy. In order to optimize the availability of this source, a sustainable exploitation strategy should always be designed. In contrast with oil systems which are practically isolated, geothermal reservoirs are open systems in which the flow of recharge due to the pressure drops is possible. Due to depth of geothermal reservoirs indirect methods based on monitoring data of wells are used to study their evolution. In this work, models widely used for the analysis of production decline data in oil wells have been adapted in order to include the analysis of geothermal wells. From them, important reservoir information needed to design optimal exploitation strategies is obtained. The analysis of production decline in wells is based either on analytical methods or on type curves fitting approaches. With the decline results of wells and considering their economic limit ...

Tecnologia y Ciencias del Agua, 2014

Geothermal wells ordinarily are exploited using the conventional methods similar to those used in... more Geothermal wells ordinarily are exploited using the conventional methods similar to those used in oil wells in their primary production stage. However after exploitation starts the productivity decline also appears in higher or lower influence rank. The decline in productivity along exploitation is a function of the reservoir properties, mass flow rate extraction and of recharge water entrance, among other parameters. In the analyzed field it was found that the unbalance caused by the higher mass extracted in comparison with the entrance mass by recharge, is one of the reasons for productivity decline in wells. It has been observed a thermodynamic evolution of some of the wells they will achieve conditions of dry steam. In this work, a section was analyzed of a producer Mexican geothermal field, with high temperature logged, small recharge water entrance and additionally low permeability. The analyzed data show quickly the decline in productivity and in some cases lacking flow. This...

Volume 11: Systems, Design, and Complexity, 2014

Measurement of high pressure and high temperature (HPHT) tools is regularly carried out in the hy... more Measurement of high pressure and high temperature (HPHT) tools is regularly carried out in the hydrocarbons sector to determine not only the characteristics and performance of fluids inside the well, but also to evaluate the mechanical condition of the pipes and the automation of production. The mechanical features of these tools are significantly influenced by the mechanical design of the structure, which eventually affects their performance and integrity. This paper describes the design process and the analysis of the structural integrity of a HPHT measuring tool for oil wells in its sensors section. The classical theories of mechanical design and specifications of the ASME boilers and pressure vessels code were used. The study is performed for several operation variables in a numerical model using a commercial code of finite element method to determinate the maximum principal stresses, total displacements and safety factor in the mechanical elements that form the device. The numerical results were compared with the experimental data source from the laboratory tests.Copyright © 2014 by ASME

Geotermia, 2013

Chemical and mineralogical characterization of scales from well 624 from the Cerro Prieto, geothe... more Chemical and mineralogical characterization of scales from well 624 from the Cerro Prieto, geothermal field, B.C.; was carried out by reflected light, X-ray diffraction, scanning electron microscope and microprobe analysis.

… Hidráulica en México, 2002

... Seleccionar todos Título: Evolución isotópica de fluidos de pozos del campo geotérmico de Los... more ... Seleccionar todos Título: Evolución isotópica de fluidos de pozos del campo geotérmico de Los Azufres, Michoacán, México Autores: Barragán Reyes, Rosa María; Portugal Marín, Enrique;Arellano Gómez, Víctor Manuel; Aragón Aguilar, Alfonso; Sandoval Medina, Fernando ...

… Hidráulica en México, 2002

... de la alcalinidad y especies carbónicas en la lluvia por el método de titulación de Gran Auto... more ... de la alcalinidad y especies carbónicas en la lluvia por el método de titulación de Gran Autores: Verma, Mehandra P.; Santoyo Gutiérrez, Sócrates; Aragón, Alfonso; Sánchez, Domingo; Fernández, Ma. Elena; Tello, Enrique; Tovar, Rigoberto; Barrera, Víctor; Barrera, Víctor ...

We use an alternative technique for determining the damage effect besides the traditional transie... more We use an alternative technique for determining the damage effect besides the traditional transient pressure tests. This alternative method uses production data of at least three measurements avoiding the necessity of long time as is required for a pressure test to achieve the pseudo steady state. Another of the advantages of this technique is that there is no fluid discharge to the environment and no consumptions of human and material resources. Also, it avoids extracting the wells from production systems, maintaining their continuous operation. One of the main results of the proposed methodology is the reservoir characterization during its operative life obtained from analysis of wells. During the process, inflow curves were used as a technical tool for determining maximum mass flow rate, reservoir pressure and enthalpy. The application of the knowledge of these parameters besides the reservoir behavior, allows for establishing the exploitation designs for each analyzed production...

Tecnologia y Ciencias del Agua, 1997

espanolEn trabajos previos se obtuvieron numericamente curvas de comportamiento de influjo para p... more espanolEn trabajos previos se obtuvieron numericamente curvas de comportamiento de influjo para productividad masica, IPR (lnflow Performance Relationships) y para productividad termica, GlPR (Geothermal lnflow Performance Relationships) de pozos geotermicos. Las curvas IPR y GlPR relacionan el flujo masico producido en los pozos geotermicos, con la presion y entalpia fluyentes en la intercara pozo-yacimiento, respectivamente. Las curvas obtenidas cubren un amplio rango de propiedades del medio roca-fluido de los yacimientos geotermicos y diferentes etapas de explotacion del mismo. Se consideraron yacimientos hipoteticos de agua pura asi como tambien yacimientos con bioxido de carbono. Adicionalmente, fueron propuestas dos curvas de referencia adimensionales para estimar las productividades de masa (IPR*) y de energia (GIPR*) de pozos geotermicos. En este trabajo se efectua un analisis preliminar de la aplicabilidad de las dos curvas de referencia propuestas, en la estimacion de cur...

Geofisica Internacional, 2012

The inflow curve may be used to determinate the damage effect and wellbore characterization in ge... more The inflow curve may be used to determinate the damage effect and wellbore characterization in geothermal fields. The methodology can be applied for determining damage effect in wells that cannot be retired from continuous exploitation. The skin or damage effect is usually estimated from transient pressure tests which require time. It was found that the damage effect in the wells increases with exploitation time and is related with deterioration of production. Knowledge of damage is needed for taking decisions about operations on the well for enhancement of productivity.

Focusing in the goal to overcome the lack of geothermal projects development in Mexico during the... more Focusing in the goal to overcome the lack of geothermal projects development in Mexico during the past two decades the Inter-American Development Bank (IDB) designed the Program of Risk Transfer and Financing for Geothermal Energy. The objective is to isolate the drilling risk during the geothermal projects development. Besides IDB, participates the Clean Technologies Fund (CTF) along with interaction of Mexican Government Institutions: Ministry of Energy (SENER), Nacional Financiera (Mexican development bank NAFIN) and the National Institute of Electricity and Clean Energies (INEEL). This program will be applied in Mexican projects to promote continuity of geothermal exploration in Mexico. Moreover, it includes financing for private investors for field development until construction in permissioned or concession areas is completed. INEEL acts as the technological arm of IDB and has leaded the two main lines of it: Drilling bidding process and Call for field developers. The bidding ...

Renewable Geothermal Energy Explorations, 2019

A geothermal project constitutes two big stages: the exploration and the exploitation. Each one h... more A geothermal project constitutes two big stages: the exploration and the exploitation. Each one has a single task whose results allow defining the feasibility of a geothermal project, until achieving the construction and operation stage of the power generation plant. The first stage contains the area recognition, its limitation to the target, and elimination of external factors until defining a geothermal zone with characteristics to be commercially exploited. The main studies and analysis that can be applied during the exploration stage are listed, and the major indicator to continue with the project or suspend is the prefeasibility report. The major risks in the exploration stage are due to studies that are carried out on the surface; at this stage, the costs can be considered low. The main results of the exploration are the selection of sites to drill three or four initial wells. Each well provides a direct overview of the reservoir: depth, production thicknesses, thermodynamic parameters, and production characteristics. The drilling of three to four exploratory wells is recommended, as far as there is certainty of the feasibility of the project, and the development of the field begins with drilling of sufficient wells to feed the plant. In this stage, the cost increases, but the risks decrease.

This paper describes a computational tool developed to aid the analysis of chemical, isotopic and... more This paper describes a computational tool developed to aid the analysis of chemical, isotopic and production data of geothermal wells. ANAGEOT is an interactive and user-friendly software that allows quickly and efficient manner, modification, retrieval and visualization of the wide amounts of data involved in the study of reservoirs. ANAGEOT optimizes time and resources, due to high quantity of historical data of most of the wells of various petroleum and geothermal fields which involve information sometimes of very long time periods. The system has the flexibility to work with different fields, considering a database for each one A very important feature of this tool is that the reports, charts and graphs are generated in a way which can be edited at any time. Similarly these can be used as source files for other applications, because they are generated in wide commercial use applications such as Microsoft Word, Excel and Golden Grapher.