Enhanced oil recovery(EOR)by means of polymer flooding is an important technology for the strategic development of offshore oilfields in China.Hydrophobically associating polyacrylamide(HAPAM)has been recently propose...Enhanced oil recovery(EOR)by means of polymer flooding is an important technology for the strategic development of offshore oilfields in China.Hydrophobically associating polyacrylamide(HAPAM)has been recently proposed as a new flooding agent.The solubility of HAPAM is low,which is the bottleneck for further improving the oil recovery through polymer flooding in offshore oilfield.Stirred tanks have been used on offshore platforms to enhance HAPAM dissolving.But there is little literature on the study of HAPAM dissolving characteristics in stirred tanks.In this paper,effects of temperature,salinity,stirring speed,impeller type and stirring method on the dissolution of HAPAM are reported.The experimental results manifest that the dissolving rate of HAPAM increases with temperature and stirring speed,but the viscosity of the polymer solution decreases.There is an optimal range of salinity for polymer dissolving.Combining the operation mode of up-pumping with varying stirring speed,hydrofoil impeller can accelerate the dissolution of HAPAM and maintain a high solution viscosity.展开更多
采用扫描电镜表征了瑞木红土镍矿的矿物结构。研究了溶样方法中的各种组合酸、加酸量及温度控制对电感耦合等离子体-原子发射光谱法(ICP-AES)测定瑞木红土镍矿中元素Ni,Co,Mg,Al,Fe的影响。结果表明:瑞木红土镍矿中的Mg,Al部分存在于含...采用扫描电镜表征了瑞木红土镍矿的矿物结构。研究了溶样方法中的各种组合酸、加酸量及温度控制对电感耦合等离子体-原子发射光谱法(ICP-AES)测定瑞木红土镍矿中元素Ni,Co,Mg,Al,Fe的影响。结果表明:瑞木红土镍矿中的Mg,Al部分存在于含硅的矿物中,为了能完全溶出红土镍矿中的Mg和Al,加入HF进行溶样是必要的。选用3 mL HCl,1 mL HNO3,1 mL的HF的优化组合酸溶样方法,能完全溶出瑞木红土镍矿试样,且不影响ICP-AES元素测定结果的准确性。展开更多
文摘Enhanced oil recovery(EOR)by means of polymer flooding is an important technology for the strategic development of offshore oilfields in China.Hydrophobically associating polyacrylamide(HAPAM)has been recently proposed as a new flooding agent.The solubility of HAPAM is low,which is the bottleneck for further improving the oil recovery through polymer flooding in offshore oilfield.Stirred tanks have been used on offshore platforms to enhance HAPAM dissolving.But there is little literature on the study of HAPAM dissolving characteristics in stirred tanks.In this paper,effects of temperature,salinity,stirring speed,impeller type and stirring method on the dissolution of HAPAM are reported.The experimental results manifest that the dissolving rate of HAPAM increases with temperature and stirring speed,but the viscosity of the polymer solution decreases.There is an optimal range of salinity for polymer dissolving.Combining the operation mode of up-pumping with varying stirring speed,hydrofoil impeller can accelerate the dissolution of HAPAM and maintain a high solution viscosity.
文摘采用扫描电镜表征了瑞木红土镍矿的矿物结构。研究了溶样方法中的各种组合酸、加酸量及温度控制对电感耦合等离子体-原子发射光谱法(ICP-AES)测定瑞木红土镍矿中元素Ni,Co,Mg,Al,Fe的影响。结果表明:瑞木红土镍矿中的Mg,Al部分存在于含硅的矿物中,为了能完全溶出红土镍矿中的Mg和Al,加入HF进行溶样是必要的。选用3 mL HCl,1 mL HNO3,1 mL的HF的优化组合酸溶样方法,能完全溶出瑞木红土镍矿试样,且不影响ICP-AES元素测定结果的准确性。
