Article
Physics, Multidisciplinary
Dario Colorado-Garrido, Gerardo Alcala-Perea, Francisco Alejandro Alaffita-Hernandez, Beatris Adriana Escobedo-Trujillo
Summary: The research aims to calculate the exergy destruction of single-flash and double-flash cycles of a geothermal power plant located on Cerro Prieto volcano in Mexicali Valley, Mexico. The methodology utilizes thermodynamic models to determine each component's contribution to total exergy destruction. Results show that the condenser has the highest contribution to total exergy destruction in both configurations, followed by the low-pressure turbine in the double-flash configuration.
Article
Geosciences, Multidisciplinary
Rasi Prasetio, Yunus Daud, Johanes Hutabarat, Hendarmawan Hendarmawan
Summary: Wayang Windu geothermal field in quaternary volcanic rock delivers 227 MW of electricity and is set for further development. Isotope and geochemistry study reveals different types of hot springs and deep fluids, with gas calculations indicating contribution from a hotter source.
GEOSCIENCES JOURNAL
(2021)
Article
Energy & Fuels
A. Reyna-Avilez, E. Gomez-Arias, D. Valencia-Cabrera, E. Tello-Hinojosa, A. Gonzalez-Fernandez, M. A. Perez-Flores
Summary: In this study, a thermodynamic-chemical analysis was conducted to investigate the fluid-rock equilibrium state of the Cerro Prieto geothermal field. The study calculated the ionic activities and activity coefficients of the main ionic constituents in the geothermal waters and observed their equilibrium with specific minerals. New geothermometers based on the chemical composition of the field were proposed, reducing the uncertainty in temperature estimates compared to classical equations. This research is important for improving temperature estimation and monitoring in geothermal fields.
Article
Energy & Fuels
Mario Gonzalez-Escobar, Young Ho Aladro, Carlos Simon Reyes-Martinez, Cristian A. Gallegos-Castillo, Sergio M. Arregui-Ojeda
Summary: This study presents a seismic reflection profile that reveals the production zone of the Cerro Prieto geothermal field, as well as its structural features and rock units, backed by well information. It also identifies a potential geothermal prospect. The study contributes to understanding the role of intrusive bodies on sediment-hosted geothermal systems.
Review
Environmental Sciences
Sigurdur John Einarsson, Bing Wu
Summary: This paper discusses the threat of climate change to global environments and human life, emphasizing the need to reduce CO2 emissions from fossil fuel industries and increase the utilization of renewable energy. Pressure-retarded osmosis (PRO) has been shown to capture renewable energy from the salinity gradient of two streams. The study focuses on thermal associated PRO processes, particularly looking at the role of thermal behavior in standalone PRO and hybrid PRO processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Jeanne Vidal, Patricia Patrier, Daniel Beaufort, Santiago Maza, Germain Rivera, Gianni Volpi, Diego Morata
Summary: This study focuses on the hydrothermal alteration, particularly clays, in the Cerro Pabellon geothermal reservoir in the Andean Cordillera of Northern Chile. X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy were used to analyze the mineralogy and crystal structure of the clay samples. The results indicate a high heterogeneity of the reservoir alteration, with pervasive alteration dominated by trioctahedral clays and fracture-controlled alteration dominated by dioctahedral clays. The study provides insights into the geological characteristics of the high enthalpy reservoir.
Article
Energy & Fuels
Jie He, Xiangdong Guo, Hongjun Cui, Kaiyu Lei, Yanyun Lei, Lin Zhou, Qinghai Liu, Yushuang Zhu, Linyu Liu
Summary: The study shows that changes in gas viscosity and compressibility with pressure and temperature affect the results in the modified flowing material balance method. When allocating dynamic reserves, it has an important impact on the stable production period and initial decline rate.
Article
Thermodynamics
Saeid Jalilinasrabady, Toshiaki Tanaka, Ryuichi Itoi, Hiroki Goto
Summary: The numerical model developed for the Takigami geothermal reservoir accurately reproduced the initial temperature profiles of 13 wells located mainly in the production area. The prediction simulation considered two development scenarios, indicating no direct interaction between reinjection and production zones in the Takigami reservoir. The study concluded that installing a binary plant would not have a severe impact on reservoir performance.
Article
Thermodynamics
Faling Yin, Yonghai Gao, Heen Zhang, Baojiang Sun, Ye Chen, Dongzhi Gao, Xinxin Zhao
Summary: Two successful trials in the South China Sea have shown that low-permeability hydrate reservoirs have great potential for commercial exploitation. By evaluating different depressurization schemes, it was found that step-wise depressurization and cycling depressurization can improve production capacity to varying degrees. The study also highlighted the importance of considering both production efficiency and reservoir stability when developing low-permeability hydrate reservoirs.
Article
Engineering, Civil
Jiexiang Li, Liang Zhang, Chuanxia Ruan, Guanghui Tian, Gideon Sagoe, Xinyi Wang
Summary: The Ranwu and Rekeng geothermal fields in Sichuan Province are non-magmatic convective geothermal systems. Ranwu is a mid-low temperature system while Rekeng is high-temperature. The study confirms Ranwu as a mid-low temperature convective system without magma degassing effects, and discourages using Na-K geothermometer due to difficulties in achieving Na-K equilibrium at such temperatures.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Civil
Yingchun Wang, Liang Li, Huaguo Wen, Yinlei Hao
Summary: This study investigates the origin of geothermal water in the Yangbajing geothermal field, as well as the sources of CO2 and He in the field. The research identifies three different reservoirs with varying temperatures and determines that the geological conditions of the Yangbajing geothermal field are not conducive for supercritical fluids, unlike other geothermal fields worldwide. These findings are significant for exploring and developing high-temperature geothermal resources in China.
JOURNAL OF HYDROLOGY
(2022)
Article
Energy & Fuels
Yilong Yuan, Tianfu Xu, Zhenjiao Jiang, Bo Feng
Summary: Deep geological exploration in the Yangbajing geothermal field revealed the presence of high-temperature fractured geothermal reservoirs, with a novel geothermal production system designed to tap into this potential for electricity generation. The proposed system can offer a sustainable and cost-effective alternative to fossil fuel plants, significantly reducing greenhouse gas emissions.
Article
Engineering, Civil
Xiaodong He, Peiyue Li, Jing Ning, Song He, Ningning Yang
Summary: This study reveals the prevalent geochemical processes during hydraulic fracturing through field fracturing and laboratory experiments. The results show that hydraulic fracturing flowback fluid is a complex mixture, influenced by water-rock and fluid-fluid interactions. Pyrite oxidation process occurs during hydraulic fracturing, and the addition of gel breaker enhances this process. Ion exchange and adsorption/desorption are critical factors affecting the stability of clay minerals. The analysis of formation water needs to be considered.
JOURNAL OF HYDROLOGY
(2022)
Article
Green & Sustainable Science & Technology
Yu Zhang, Yanjun Zhang, Ling Zhou, Zhihong Lei, Liangliang Guo, Jian Zhou
Summary: The study indicates that gel-proppant hydraulic fracturing and a two-horizontal-well system prove feasible for the granodiorite reservoir in the ZR2 well at the Zhacang geothermal field, China. These methods can optimize reservoir stimulation, reduce greenhouse gas emissions, lower the cost of electricity, and show significant development potential from an economic perspective.
Article
Thermodynamics
Kaixuan Wang, Zaobao Liu, Tao Zeng, Fei Wang, Wanqing Shen, Jianfu Shao
Summary: This paper investigates the heat extraction performance of an enhanced geothermal system (EGS) under the influence of injection-production parameters and reservoir properties. A thermal-hydro-mechanical (THM) coupled model is used to quantify the complicated heat extraction process, and three-dimensional geothermal reservoir models are established to study the impact of fracture numbers. The results show the importance of optimizing fractures and the dominance of injection mass flow rate, fracture permeability, and injection temperature in affecting heat extraction performance. The findings have practical implications for the efficient construction and operation of EGS.
APPLIED THERMAL ENGINEERING
(2022)