Hydrogeochemical characteristics of deep saline aquifers in sedimentary basins in China and implications for CO2 geological storage with emphasis on total dissolved solids (TDS) and water type
Hydrogeochemical characteristics of deep saline aquifers in sedimentary basins in China and implications for CO2 geological storage with emphasis on total dissolved solids (TDS) and water type
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DOI：
10.1002/ghg.1645
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发表时间：
2017-02
影响因子：
2.2
通讯作者：
Yiman Li;Z. Pang
中科院分区：
文献类型：
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作者：
Yiman Li;Z. Pang
沉积盆地深层咸水含水层的水文地球化学特征，特别是总溶解固体的水文地球化学特征，对co2的溶解度有很大的影响，是判断co2储存量的关键指标之一。本文通过对沉积盆地总溶解固形物（TDS）和地层水类型的详细研究，评价了中国沉积盆地对co2封存的适宜性。根据TDS和水的类型将深层咸水层分为三类：TDS小于10 g/L的淡水-微咸水、TDS介于10 g/L至50 g/L的半咸水和TDS大于50 g/L的咸水。中国东部沉积盆地以Cl·HCO 3‐Na水型为主，淡化水为微咸水。东南部和中西部为Cl - Na型半咸水和咸水。提出了中国不同地区的TDS限值，以优化地层水的利用。计算了co2在TDS为1g/L ~ 260g/L的地层水中的溶解度。结果表明，TDS与水呈指数相关，在10 g/L和50 g/L时出现了两个急剧的拐点。对于淡水-微盐水含水层，华东地区建议TDS限值为3 g/L，而西部地区建议为5 g/L。对于TDS为10 g/L ~ 150 g/L的地层水，中国主要沉积盆地建议采用10 g/L。对于TDS大于150 g/L的深盐含水层，不建议进行CO 2蓄水，以免与盐类矿产资源勘探冲突。©2016化学工业协会和约翰威利父子有限公司
The hydrogeochemistry of deep saline aquifers in sedimentary basins, in particular total dissolved solids, is one of the key criteria for CO 2 storage because CO 2 solubility is greatly affected by it. A detailed investigation of total dissolved solids (TDS) and water type of formation water is presented in the paper to assess the suitability of sedimentary basins in China for CO 2 sequestration. Deep saline aquifers are divided into three categories based on TDS and water type: fresh‐slightly saline water with TDS less than 10 g/L, semi saline–saline water with TDS ranging from 10 g/L to 50 g/L, and salty water with TDS higher than 50 g/L. The fresh, slightly saline water is dominated by water type of Cl·HCO 3 ‐Na in sedimentary basins in East China. Semi saline‐saline and salty waters are of Cl‐Na type existing in the southeast and mid‐west. TDS limits are suggested for different regions of China to optimize the use of formation water. Solubility of CO 2 in formation water with TDS of 1g/L∼260g/L is calculated. Results show it exhibits exponential correlation to water TDS and two sharp inflections are observed at 10 g/L and 50 g/L. For fresh‐slightly saline aquifer, TDS limit is defined as 3 g/L in East China while in West China, 5 g/L is suggested. For formation water with TDS of 10 g/L∼150 g/L, 10 g/L is proposed for the main sedimentary basins in China. For deep saline aquifers with TDS higher than 150 g/L, CO 2 storage is not suggested to avoid conflicts with salts mineral resources exploration. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd.