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| 1 | Efficiency of enhanced oil recovery by injection of low-salinity water in barium-containing carbonate reservoirs显示文摘When low-salinity water containing sulfate ions is injected into carbonate reservoirs, rock dissolution and in situ precipitation occur, altering rock permeability and wettability. Particularly, when barium ions are present in formation water,they react chemically with SO_4^(-2), and BaSO_4 is precipitated. These reactions can cause a serious impact on the efficiency of enhanced oil recovery(EOR). Therefore, the main purpose of this study was to identify EOR efficiency induced by lowsalinity waterflooding(LSWF) when Ba^(2+) is present in carbonate reservoirs. From the experimental results, it was confirmed that the permeability calculated by the measured pressure difference was improved because of rock dissolution predominating over in situ precipitation for the case of low Ba^(2+) concentrations. In the analysis of wettability alteration through the measurements of relative permeabilities before and after LSWF, the higher Ba^(2+) concentration case consumed more SO_4^(-2) in precipitating the BaSO_4, resulting in weaker wettability alteration due to the reduction of sulfate activity.These phenomena ultimately influenced EOR efficiency, i.e., the oil recovery was greater for the lower Ba^(2+) concentration. | Hyemin Park Yongjun Park Yeonkyeong Lee Wonmo Sung | 2018 | Petroleum Science2018,15,4: | 2 |
| 2 | Error Calibration ofMagnetometer Using Nonlinear Integrated Filter Model WithInertial Sensors显示文摘 | Wonmo Koo Sangkyung Sung Young Jae Lee | 2009 | IEEE Transaction on Magnetics2009,45,6: | 1 |
| 3 | Error Calibration of Magnetometer Using Nonlinear Integrated Filter Model With Inertial Sensors 显示文摘 | Wonmo Koo Sangkyung Sung Young Jae Lee | 2009 | IEEE Transactions on Magnetics2009,45,6: | 1 |
| 4 | Optimization of pipeline networks with a hybrid MCST CD networking model 显示文摘 | SUNG WONMO HUH DAEGEE LEE JUNGHWAN | 1998 | SPE Production & Facilities1998,13,3: | 1 |
| 5 | Numerical study for production performances of a methane hydrate reservoir stimulated by inhibitor injection显示文摘 | WONMO Sung | 2002 | Energy Sources2002,24,6: | 1 |
| 6 | 利用降压法分解天然气水合物试验研究显示文摘在世界的很多地区都发现了大范围的天然产出的气体水合物。由于水合物储存了大量的甲烷气体,所以被认为是未来的新能源。尽管人们已经清楚自然产出的天然气水合物存在于海洋和永久冻土带,但是对于如何从水合物储层中获取天然气的技术却知之甚少。本文讨论了在室内测试中水合物储层中气体的采收率。在本次研究当中,为分析水合物在多孔岩石里的分解现象而设计制造了实验设备。利用降压试验研究气体水合物的分解特性和分解气产量。通过试验,得出了水合物在不同条件下降压时的气体的产能,以及水合物随时间分解过程的比较结果。同时对分解气在多孔岩石内的流动规律和产量进行了研究。研究结果对提高水合物储层气体采收率将会有所帮助。 | Jeonghwan Lee Seoungsoo Park Wonmo Sung 邵长高(译) | 2010 | 海洋地质2010,,3: | 0 |
| 7 | Polymer efficiency and sulfate concentration for hybrid EOR application to an acidic carbonate reservoir显示文摘Polymers play an important role in hybrid enhanced oil recovery (EOR), which involves both a polymer and low-salinity water. Because the polymer commonly used for low-salinity polymer flooding (LSPF) is strongly sensitive to brine pH, its efficiency can deteriorate in carbonate reservoirs containing highly acidic formation water. In this study, polymer efficiency in an acidic carbonate reservoir was investigated experimentally for different salinity levels and SO42− concentrations. Results indicated that lowering salinity improved polymer stability, resulting in less polymer adsorption, greater wettability alteration, and ultimately, higher oil recovery. However, low salinity may not be desirable for LSPF if the injected fluid does not contain a sufficient number of sulfate (SO42−) ions. Analysis of polymer efficiency showed that more oil can be produced with the same polymer concentration by adjusting the SO42− content. Therefore, when river water, which is relatively easily available in onshore fields, is designed to be injected into an acidic carbonate reservoir, the LSPF method proposed in this study can be a reliable and environmentally friendly method with addition of a sufficient number of SO42− ions to river water. | Yeonkyeong Lee Wonmo Sung Jihoon Wang | 2023 | Petroleum Science2023,20,2: | 0 |