Assessing Seferihisar-İzmir (Türkiye) geothermal energy prospects through marine seismic and field geology data modelling

IF 3.5 2区工程技术 Q3 ENERGY & FUELS

Geothermics Pub Date : 2025-02-27 DOI:10.1016/j.geothermics.2025.103295

Gizem Kılınç , Günay Çifci , Seda Okay Günaydın , Altuğ Hasözbek , Savaş Gürçay , Talip Güngör , Zülfü Demirkıran , Melih Çobanoğlu

{"title":"Assessing Seferihisar-İzmir (Türkiye) geothermal energy prospects through marine seismic and field geology data modelling","authors":"Gizem Kılınç , Günay Çifci , Seda Okay Günaydın , Altuğ Hasözbek , Savaş Gürçay , Talip Güngör , Zülfü Demirkıran , Melih Çobanoğlu","doi":"10.1016/j.geothermics.2025.103295","DOIUrl":null,"url":null,"abstract":"<div><div>Seferihisar (Izmir) is one of the most significant geothermal regions in the Aegean of Western Anatolia, Türkiye, due to its high geothermal gradient, extensive fault systems, and unique interaction between marine and meteoric waters that create distinct geothermal reservoirs. This study evaluates the geothermal potential and geological characteristics of the Seferihisar area by integrating marine seismic data with onshore geological observations. Specifically, this study combines: (i) geological and geochemical data from geothermal wells along the Tuzla Fault, (ii) high-resolution multichannel seismic reflection data from the Sigacik and Kusadasi Bays, and (iii) correlated onshore and offshore geological and geophysical datasets to develop a 2D conceptual cross-section and a 3D fault model.</div><div>Geochemical analyses, including water geochemistry, XRF, and isotope studies, reveal that geothermal fluids in the region originate from a mix of meteoric and marine sources. Chloride concentrations in geothermal wells reach approximately ranging from 11,692 to 12,000 ppm, confirming significant seawater intrusion, while geothermometers estimate reservoir temperatures in the range of 220–280 °C. Isotopic data, such as ³He/⁴He ratios (∼0.9 Ra), suggest minor mantle involvement, and ⁴⁰Ar/³⁶Ar ratios ranging 301 that indicate crustal contributions to the geothermal fluids. These isotopic signatures provide critical insights into the sources and circulation dynamics of geothermal systems.</div><div>Through integrated 2D conceptual cross-sections and 3D fault modeling, the study identifies the marine extension of the Tuzla Fault and its role in fluid dynamics, including up-flow and out-flow processes. The fault's continuities are linked to geothermal gradients and active fluid pathways, making the Tuzla Fault a critical target for geothermal exploration. The harmonized models suggest three potential drilling sites with high thermal gradients and fault-controlled fluid flow, optimizing the exploration strategy. Scaling and corrosion challenges in production wells are addressed through the application of inhibitors, which are integral to ensuring sustainable operation and long-term system performance.</div><div>These multidisciplinary findings provide likely actionable insights into optimizing resource extraction, reducing environmental impact, and improving the long-term performance of geothermal systems. The study supports sustainable geothermal energy development in the Seferihisar region by addressing production challenges and guiding effective resource management.</div></div>","PeriodicalId":55095,"journal":{"name":"Geothermics","volume":"129 ","pages":"Article 103295"},"PeriodicalIF":3.5000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geothermics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0375650525000471","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}

引用次数: 0

Abstract

Seferihisar (Izmir) is one of the most significant geothermal regions in the Aegean of Western Anatolia, Türkiye, due to its high geothermal gradient, extensive fault systems, and unique interaction between marine and meteoric waters that create distinct geothermal reservoirs. This study evaluates the geothermal potential and geological characteristics of the Seferihisar area by integrating marine seismic data with onshore geological observations. Specifically, this study combines: (i) geological and geochemical data from geothermal wells along the Tuzla Fault, (ii) high-resolution multichannel seismic reflection data from the Sigacik and Kusadasi Bays, and (iii) correlated onshore and offshore geological and geophysical datasets to develop a 2D conceptual cross-section and a 3D fault model.

Geochemical analyses, including water geochemistry, XRF, and isotope studies, reveal that geothermal fluids in the region originate from a mix of meteoric and marine sources. Chloride concentrations in geothermal wells reach approximately ranging from 11,692 to 12,000 ppm, confirming significant seawater intrusion, while geothermometers estimate reservoir temperatures in the range of 220–280 °C. Isotopic data, such as ³He/⁴He ratios (∼0.9 Ra), suggest minor mantle involvement, and ⁴⁰Ar/³⁶Ar ratios ranging 301 that indicate crustal contributions to the geothermal fluids. These isotopic signatures provide critical insights into the sources and circulation dynamics of geothermal systems.

Through integrated 2D conceptual cross-sections and 3D fault modeling, the study identifies the marine extension of the Tuzla Fault and its role in fluid dynamics, including up-flow and out-flow processes. The fault's continuities are linked to geothermal gradients and active fluid pathways, making the Tuzla Fault a critical target for geothermal exploration. The harmonized models suggest three potential drilling sites with high thermal gradients and fault-controlled fluid flow, optimizing the exploration strategy. Scaling and corrosion challenges in production wells are addressed through the application of inhibitors, which are integral to ensuring sustainable operation and long-term system performance.

These multidisciplinary findings provide likely actionable insights into optimizing resource extraction, reducing environmental impact, and improving the long-term performance of geothermal systems. The study supports sustainable geothermal energy development in the Seferihisar region by addressing production challenges and guiding effective resource management.

查看原文本刊更多论文

通过海洋地震和野外地质数据建模评估Seferihisar-İzmir （t rkiye）地热能源前景

Seferihisar（伊兹密尔）是西安纳托利亚爱琴海地区最重要的地热地区之一，由于其高地热梯度，广泛的断层系统，以及海洋和大气水之间独特的相互作用，创造了独特的地热储层。本研究将海洋地震资料与陆上地质观测资料相结合，评价了Seferihisar地区的地热潜力和地质特征。具体而言，本研究结合了：(i)图兹拉断层沿线地热井的地质和地球化学数据，（ii） Sigacik和Kusadasi海湾的高分辨率多通道地震反射数据，以及（iii）相关的陆上和海上地质和地球物理数据集，以开发2D概念截面和3D断层模型。地球化学分析，包括水地球化学、XRF和同位素研究，表明该地区的地热流体来自大气和海洋的混合来源。地热井中的氯化物浓度约为11,692至12,000 ppm，证实存在明显的海水入侵，而地温计估计储层温度在220-280℃之间。同位素数据，如³He/⁴He比值（~ 0.9 Ra），表明地幔参与程度较小，而⁴⁰Ar/³⁶Ar比值范围为301，表明地壳对地热流体的贡献。这些同位素特征为地热系统的来源和循环动力学提供了重要的见解。通过综合二维概念截面和三维断层建模，该研究确定了图兹拉断层的海洋延伸及其在流体动力学中的作用，包括向上流动和流出过程。图兹拉断层的连续性与地热梯度和活跃的流体通道有关，使其成为地热勘探的重要目标。协调模型提出了3个具有高热梯度和断层控制流体流动的潜在钻井点，优化了勘探策略。通过抑制剂的应用，可以解决生产井中的结垢和腐蚀问题，这对于确保系统的可持续运行和长期性能是不可或缺的。这些多学科的发现为优化资源开采、减少环境影响和提高地热系统的长期性能提供了可行的见解。该研究通过解决生产挑战和指导有效的资源管理，支持Seferihisar地区的可持续地热能开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geothermics 工程技术-地球科学综合

CiteScore

7.70

自引率

15.40%

发文量

237

审稿时长

4.5 months

期刊介绍： Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.