Quantitative Raman Spectroscopic Measurements of CO2 Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) Mpa
Quantitative Raman Spectroscopic Measurements of CO2 Solubility in NaCl Solution from (273.15 to 473.15) K at p = (10.0, 20.0, 30.0, and 40.0) Mpa
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在 p = (10.0、20.0、30.0 和 40.0) Mpa 时定量拉曼光谱测量 (273.15 至 473.15) K 的 NaCl 溶液中 CO2 溶解度
DOI：
10.1021/acs.jced.5b00651
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发表时间：
2016
影响因子：
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通讯作者：
Qian Zhou
中科院分区：
文献类型：
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作者：
Huirong Guo;Yiqi Huang;Ying Chen;Qian Zhou
CO_2-H_2 O-NaCl体系在较宽的T-P-mNaCl范围内的高压相态研究对于深部油藏注CO_2储层或提高采收率具有重要意义。CO2在盐水中溶解度的计算对于预测含盐含水层的CO2储存量具有重要意义。然而，高盐度和高压下CO2溶解度数据有限，很少有热力学模型能准确预测盐度高于4.5 mol/kg时CO2的溶解度。本研究利用非侵入性的定量拉曼光谱技术研究了CO2-H2O-NaCl体系的高压平衡。从（273.15 ~ 473.15）K到40 MPa，共获得了180个二氧化碳在（1，3和5）mol/kg NaCl溶液中的溶解度数据点。对Duan型溶解度模型进行了改进，得到了新的参数，使其能在（273 ~ 473）K、（3 ~ 60）MPa条件下准确计算CO2在NaCl水溶液中的溶解度，最高可达6 mol NaCl/kg H2O。
The knowledge of high pressure phase behavior of the CO2–H2O–NaCl system in a wideT–P–mNaClrange is of great interest in the injection of CO2to deep reservoir for storage or enhancement of oil recovery (EOR). The calculation of CO2solubility in brine is very important to predict the CO2storage capacity in saline aquifers. However, CO2solubility data at high salinity and high pressure are limited, and few thermodynamic models can accurately predict CO2solubility when salinity is higher than 4.5 mol/kg. In this study, a noninvasive technique, quantitative Raman spectroscopy, was used to investigate the high pressure equilibria of the CO2–H2O–NaCl system. A total of 180 solubility data points were obtained for carbon dioxide in (1, 3, and 5) mol/kg NaCl solutions from (273.15 to 473.15) K up to 40 MPa. New parameters were derived to improve the Duan-type solubility model, thus it can be applied in CO2sequestration and EOR to accurately calculate the solubility of CO2in NaCl aqueous solution up to 6 mol NaCl/kg H2O from (273 to 473) K, (3 to 60) MPa.