首页|Paradigm for Determining the Optimal Ultradeep and Super-thick Saline Aquifer for High-TDS Mine Water Geological Storage

Paradigm for Determining the Optimal Ultradeep and Super-thick Saline Aquifer for High-TDS Mine Water Geological Storage

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Saline aquifers are the most popular waste and CO2 injection and storage reservoirs worldwide.This project proposes that several optimal injection positions should be investigated as hydraulic pressure-focused positions,in order to relieve the high demands of pump performance.The comprehensive indices(Fi)representing the injectivity of different burial depths were obtained by using information entropy,based on the mercury injection experimental data of 13 rock samples.The results demonstrated that the burial depths of No.4,No.1 and No.2 in the Liujiagou Formation were the most suitable positions for hydraulic focused injection,which means the upper 30 m thickness could be regarded as the hydraulic focused range in the saline aquifer with an average thickness of 400 m.In addition,some laboratory experiments and in situ tests were carried out for the purpose of certifying and analyzing results,including SEM,XRD,brittleness index and logging.The results suggested that the rock samples at the No.4,No.1 and No.2 burial depth ranges have loose microstructure,weak cementation,as well as dual pores and fractures.The lithology is mainly quartz and feldspar,but the clay mineral content is high(10％-25％),which is positive for dissolution.The lithology is suitable for hydraulic fracturing to form extended cracks and micro-fissures during high-TDS(total dissolved solids)mine water injection,because of the high brittleness index.Finally,a theoretical and technical framework for high-TDS mine water injection was established,based on operating pilot engineering.Some theoretical defects and drawbacks learned from the field practices were summarized and solutions proposed.The research in this study could provide guidance and a paradigm for the inexpensive treatment of high-TDS mine water by injection and storage.

ultradeep Liujiagou Formationhigh-TDS mine wateroptimal hydraulic injection positionsinformation entropyreservoir spatial characteristics

LI Xin、CHEN Ge、XU Zhimin、LIU Qi、CHEN Tianci、SUN Yajun

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School of Resources and Geosciences,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China

National Professional Central Laboratory of Basic Research on Mine Water Disaster Prevention and Control Technology,Xuzhou,Jiangsu 221116,China

国家重点研发计划国家重点研发计划National Science Foundation of Jiangsu Province,China国家自然科学基金国家自然科学基金中央高校基本科研业务费专项

2023YFC30121032019YFC1805400BK2021052442202268421722722020ZDPY0201

2024

10.1111/1755-6724.15162

地质学报(英文版)
中国地质学会

地质学报(英文版)

CSTPCD
影响因子：1.414
ISSN：1000-9515
年,卷(期)：2024.98(3)
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