相渗透率研究是油田开发方案编制和生产管理不可缺少的基础工作,在注水开发油田中,由于中轻质油田相对稠油油田具有较长的无水采油期或低含水期,而常规的非稳态实验中相渗数据点在中高含水饱和度处较为集中,因此采用此方法获取的相渗数...相渗透率研究是油田开发方案编制和生产管理不可缺少的基础工作,在注水开发油田中,由于中轻质油田相对稠油油田具有较长的无水采油期或低含水期,而常规的非稳态实验中相渗数据点在中高含水饱和度处较为集中,因此采用此方法获取的相渗数据直接应用到中轻质油田生产动态分析及数模拟合中误差较大。针对以上问题,对渤南区域中轻质油田分别采用稳态与非稳态两种实验方法获取相渗数据并开展研究,结果表明:当地层原油黏度小于6 m Pa·s时,两种实验方法结果差异较大,宜采用稳态法;当原油黏度高于6 m Pa·s时,差异可忽略不计,宜采用非稳态法代替稳态法。研究发现,非润湿相黏度、沉积相特征、润湿性、温度等因素对中轻质油藏相渗曲线形态及含水上升规律都有不同程度的影响,在油田开发研究中应综合考虑。展开更多
Knowledge of the oxygen mass transfer of aerators under operational conditions in a full-scale wastewater treatment plant （WWTP） is meaningful for the optimization of WWTP, however, scarce to best of our knowledge. ...Knowledge of the oxygen mass transfer of aerators under operational conditions in a full-scale wastewater treatment plant （WWTP） is meaningful for the optimization of WWTP, however, scarce to best of our knowledge. Through analyzing a plug flow aeration tank in the Lucun WWTP, in Wuxi, China, the oxygenation capacity of fine-bubble aerators under process conditions have been measured in- situ using the off-gas method and the non-steady-state method. The off-gas method demonstrated that the aerators in different corridors in the aeration tank of WWTP had significantly different oxygen transfer performance; furthermore, the aerators in the same corridor shared almost equal oxygen transfer performance over the course of a day. Results measured by the two methods showed that the oxygen transfer performance of fine-bubble aerators in the aeration tank decreased dramatically compared with that in the clean water. The loss of oxygen transfer coefficient was over 50% under low-aeration conditions （aeration amount 〈 0.67 Nm 3 /hr）. However, as the aeration amount reached 0.96 Nm 3 /hr, the discrepancy of oxygen transfer between the process condition and clean water was negligible. The analysis also indicated that the non-steady-state and off-gas methods resulted in comparable estimates of oxygen transfer parameters for the aerators under process conditions.展开更多
文摘相渗透率研究是油田开发方案编制和生产管理不可缺少的基础工作,在注水开发油田中,由于中轻质油田相对稠油油田具有较长的无水采油期或低含水期,而常规的非稳态实验中相渗数据点在中高含水饱和度处较为集中,因此采用此方法获取的相渗数据直接应用到中轻质油田生产动态分析及数模拟合中误差较大。针对以上问题,对渤南区域中轻质油田分别采用稳态与非稳态两种实验方法获取相渗数据并开展研究,结果表明:当地层原油黏度小于6 m Pa·s时,两种实验方法结果差异较大,宜采用稳态法;当原油黏度高于6 m Pa·s时,差异可忽略不计,宜采用非稳态法代替稳态法。研究发现,非润湿相黏度、沉积相特征、润湿性、温度等因素对中轻质油藏相渗曲线形态及含水上升规律都有不同程度的影响,在油田开发研究中应综合考虑。
基金supported by the Major Water Project of the National Science and Technology (No.2011ZX07319-001-004, 2011ZX07301-002)
文摘Knowledge of the oxygen mass transfer of aerators under operational conditions in a full-scale wastewater treatment plant （WWTP） is meaningful for the optimization of WWTP, however, scarce to best of our knowledge. Through analyzing a plug flow aeration tank in the Lucun WWTP, in Wuxi, China, the oxygenation capacity of fine-bubble aerators under process conditions have been measured in- situ using the off-gas method and the non-steady-state method. The off-gas method demonstrated that the aerators in different corridors in the aeration tank of WWTP had significantly different oxygen transfer performance; furthermore, the aerators in the same corridor shared almost equal oxygen transfer performance over the course of a day. Results measured by the two methods showed that the oxygen transfer performance of fine-bubble aerators in the aeration tank decreased dramatically compared with that in the clean water. The loss of oxygen transfer coefficient was over 50% under low-aeration conditions （aeration amount 〈 0.67 Nm 3 /hr）. However, as the aeration amount reached 0.96 Nm 3 /hr, the discrepancy of oxygen transfer between the process condition and clean water was negligible. The analysis also indicated that the non-steady-state and off-gas methods resulted in comparable estimates of oxygen transfer parameters for the aerators under process conditions.
