The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Guicai Zhang - One of the best experts on this subject based on the ideXlab platform.
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study on organic alkali surfactant polymer flooding for enhanced ordinary Heavy Oil recovery
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2016Co-Authors: Guicai Zhang, Kaili Liao, Haihua Pei, Ping JiangAbstract:Abstract With regard to ordinary Heavy Oil reservoirs which are not suitable for thermal methods, alkaline-surfactant-polymer (ASP) flooding exhibits great potential for enhancing Heavy Oil recovery. But for the formation water with high content of Ca 2+ and Mg 2+ ions, conventional ASP flooding always causes precipitation of a large amount of Ca and Mg salts which are damage to reservoirs. In this study, organic alkali-surfactant-polymer (OASP) flooding system is established, which exhibits good compatibility with the brine containing high-valent metal ions. The interfacial tension tests show that the combination of Shengli petroleum sulfonate (SLPS) and ethanolamine exhibits a good synergistic effect, and acquires an ultralow interfacial tension. Based on micromodel flooding tests, the mechanisms of OASP flooding system are studied as follows: the organic alkali in OASP system reacts with the acidic component of Heavy Oil and promotes the formation of water-in-Oil (W/O) emulsion in Heavy Oil, thus increasing the flow resistance of flooding liquid and improving the sweep efficiency of normal ASP system. The generated surface active materials and surfactant can decrease the interfacial tension to an ultralow level, which could easily initiate the emulsion dispersion of crude Oil, form the O/W emulsion, and improve the Oil displacement efficiency. The sandpack flood results demonstrate that the Oil recovery is increased by about 20%, and the recovery increases with the increase in organic alkali concentration. Therefore, the organic alkali-surfactant-polymer flooding technology can be developed into a new type of economically and technically feasible compound flooding technology suitable for ordinary Heavy Oil reservoirs with high content of Ca 2+ and Mg 2+ ions. Moreover, OASP flooding technology shows broad application prospects in improving the recovery of ordinary Heavy Oil reservoirs in Shengli Oilfield.
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low gas liquid ratio foam flooding for conventional Heavy Oil
Petroleum Science, 2011Co-Authors: Jing Wang, Guicai Zhang, Jijiang Ge, Baodong DingAbstract:The recovery of Heavy Oil by water flooding is 10% lower than that of conventional crude Oil, so enhanced Oil recovery (EOR) is of great significance for Heavy Oil. In this paper, foam flooding with a gas-liquid ratio (GLR) of 0.2:1 for the Zhuangxi Heavy Oil (325 mPa·s at 55 °C) was performed on cores, sand packs and plate model. In sand pack tests, polymer enhanced foam flooding increased Oil recovery by 39.8%, which was 11.4% higher than that for alkali/surfactant/polymer (ASP) flooding under the same conditions. Polymer enhanced foam flooding in plate models shows that the low GLR foam flooding increased Oil recovery by about 30%, even when the extended water flooding was finished at 90% water cut. Moreover, it was discovered by microscopy that foam was more stable in Heavy Oil than in light Oil. These results confirm that low GLR foam flooding is a promising technology for displacing conventional Heavy Oil.
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laboratory study on low gas liquid ratio foam flooding for zhuangxi Heavy Oil
Journal of Dispersion Science and Technology, 2011Co-Authors: Guicai Zhang, Baodong Ding, Jijiang Ge, Na Li, Jing Wang, Lei WangAbstract:Considering the high cost and injection pressure of conventional foam flooding, foam flooding with low gas/liquid ratio was proposed to enhance the Heavy Oil recovery. A foamer containing 0.2 wt% α -olefin sulfonate, 0.1 wt% HPAM and 0.5 wt% Na2CO3 was selected for Zhuangxi Heavy Oil. Then the foam stability and low gas/liquid ratio foam flooding were studied via micro model and sand pack experiments. The results indicate that the foam is much more stable in Heavy Oil than in diesel; in flooding tests, this foamer with gas/liquid ratio of 0.2:1 increases the Oil recovery by 39.8%, which is nearly 11% higher than ASP solution in terms of the same injection volume (0.3PV) and agents.
Michio Inagaki - One of the best experts on this subject based on the ideXlab platform.
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sorption and recovery of a grade Heavy Oil by using exfoliated graphite packed in plastic bag
Carbon, 2001Co-Authors: Masahiro Toyoda, Naoto Dogawa, Tomonori Seki, Atushi Fujita, Michio InagakiAbstract:For a practical application to recover Heavy Oil, exfoliated graphite packed into a plastic bag and compacted exfoliated graphite were prepared. Their sorption behavior was studied. Exfoliated graphite packed into a polypropylene non-woven bag with a lower bulk density sorbed 40g A-grade Heavy Oil per 1g exfoliated graphite. The sorption of Heavy Oil by the exfoliated graphite compacts showed a little lower sorption capacity than exfoliated graphite packed in the plastic bag. The use of exfoliated graphite packed into a plastic bag seemed to be effective in recovering Heavy Oil spilled on water.
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Heavy Oil sorption using exfoliated graphite new application of exfoliated graphite to protect Heavy Oil pollution
Carbon, 2000Co-Authors: Masahiro Toyoda, Michio InagakiAbstract:Abstract The sorption behaviors of four kinds of Heavy Oils into exfoliated graphites with different bulk densities were studied. The maximum sorption capacity of an exfoliated graphite with a bulk density of 6 kg/m3 was found to be suprisingly high, 86 g of A-grade Heavy Oil and 76 g of crude Oil per 1 g of exfoliated graphite, respectively, and also its sorption occured very rapidly, i.e. within 2 min. Sorption capacity was found to depend strongly on the bulk density and pore volume of the exfoliated graphite and the time it took to reach maximum sorption, as well as sorption capacity, as an exfoliated graphite depended strongly on the grade of Heavy Oil. Heavy Oils sorbed into the exfoliated graphite could be recovered either by a simple compression or suction filtration with a recovery ratio of 60–80%. Recovered Oils showed no difference in molecular weight and hydrocarbon constituent from the original. No increase of the water content in the recovered Oils was detected, suggesting preferential sorption of Heavy Oil into exfoliated graphite. This result indicates clearly that the Oils recovered from the exfoliated graphite can be recycled. From the present work, exfoliated graphite with low bulk density is a promising material for the sorption and recovery of spilled Heavy Oil.
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sorption and recovery of Heavy Oil by using exfoliated graphite
Desalination, 1998Co-Authors: Masahiro Toyoda, Junichi Aizawa, Michio InagakiAbstract:Recent Oil tanker accidents in the sea are very serious, not only since they pollute the environment but also because they release Heavy Oil. An exfoliated graphite was found to sorb Heavy Oil floating on the water and separate it easily from the water. The maximum capacity of sorption of A-grade Heavy Oil reached more than 80 times the weight of the exfoliated graphite used. By simple compression the Heavy Oil sorbed into exfoliated graphite could be recovered, with a maximum yield of recovery being about 80% of the sorbed Oil.
Jing Wang - One of the best experts on this subject based on the ideXlab platform.
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enhance Oil recovery for steam flooding low temperature oxidative decomposition of Heavy Oil with air injection
Energy & Fuels, 2015Co-Authors: Changjiu Wang, Jing Wang, Zhanxi Pang, Changyong Chen, Chunlei Wang, Zhengbin WuAbstract:With the increasing demand of energy, technical research of how to enhance Oil recovery of steam flooding for Heavy Oil reservoirs has attracted widespread attention at present. Air-injection is an effective technology that has been used to improve the development effect of steam flooding in Heavy Oil reservoirs. The low-temperature oxidation (LTO) reaction and the high-temperature combustion reaction are the main mechanisms of air-injection technology. The high-temperature combustion reaction can decompose the Heavy component in Heavy Oil, but it requires a higher-temperature condition, which the steam flooding process cannot offer. In addition, the LTO reaction between air and Heavy Oil consumes the O2, so the safety risk of explosion caused by the mixture of O2 and hydrocarbon gas can be eliminated. Nevertheless, Oil viscosity will increase. During the steam flooding process, an aquathermolysis reaction occurs between Heavy Oil and high-temperature water, which decreases the content of the Heavy compon...
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low gas liquid ratio foam flooding for conventional Heavy Oil
Petroleum Science, 2011Co-Authors: Jing Wang, Guicai Zhang, Jijiang Ge, Baodong DingAbstract:The recovery of Heavy Oil by water flooding is 10% lower than that of conventional crude Oil, so enhanced Oil recovery (EOR) is of great significance for Heavy Oil. In this paper, foam flooding with a gas-liquid ratio (GLR) of 0.2:1 for the Zhuangxi Heavy Oil (325 mPa·s at 55 °C) was performed on cores, sand packs and plate model. In sand pack tests, polymer enhanced foam flooding increased Oil recovery by 39.8%, which was 11.4% higher than that for alkali/surfactant/polymer (ASP) flooding under the same conditions. Polymer enhanced foam flooding in plate models shows that the low GLR foam flooding increased Oil recovery by about 30%, even when the extended water flooding was finished at 90% water cut. Moreover, it was discovered by microscopy that foam was more stable in Heavy Oil than in light Oil. These results confirm that low GLR foam flooding is a promising technology for displacing conventional Heavy Oil.
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laboratory study on low gas liquid ratio foam flooding for zhuangxi Heavy Oil
Journal of Dispersion Science and Technology, 2011Co-Authors: Guicai Zhang, Baodong Ding, Jijiang Ge, Na Li, Jing Wang, Lei WangAbstract:Considering the high cost and injection pressure of conventional foam flooding, foam flooding with low gas/liquid ratio was proposed to enhance the Heavy Oil recovery. A foamer containing 0.2 wt% α -olefin sulfonate, 0.1 wt% HPAM and 0.5 wt% Na2CO3 was selected for Zhuangxi Heavy Oil. Then the foam stability and low gas/liquid ratio foam flooding were studied via micro model and sand pack experiments. The results indicate that the foam is much more stable in Heavy Oil than in diesel; in flooding tests, this foamer with gas/liquid ratio of 0.2:1 increases the Oil recovery by 39.8%, which is nearly 11% higher than ASP solution in terms of the same injection volume (0.3PV) and agents.
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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low temperature oxidation and characterization of Heavy Oil via thermal analysis
Energy & Fuels, 2015Co-Authors: Wanfen Pu, Lei Wang, Chengdong Yuan, Zhen Qian, Yibo Li, Dong Li, Yafei ChenAbstract:High pressure air injection (HPAI) without ignition has attracted extensive attention in the air injection based improved Oil recovery (IOR) process for light Oil reservoirs but was rarely proposed as an IOR process for Heavy Oil reservoirs. This study aims at evaluating the potential of HPAI without ignition for deep, high pressure, Heavy Oil reservoirs (Tahe Oilfield, Tarim Basin, China). Many low-temperature oxidation (LTO) experiments were carried out to study the oxidation behavior of Heavy Oil under the reservoir conditions (120 °C, about 30–40 MPa) using an isothermal oxidation reactor. The produced gases were analyzed using gas chromatography for their content of O2, CO2, CO, and hydrocarbon gas (C1–C6) content. The apparent hydrogen/carbon (H/C) and molar ratio of the carbon oxides (m-ratio) were also calculated from effluent gases to analyze oxidation behavior. The effects of quartz, reservoir core (characterized by X-ray diffraction), formation water, and catalyst on LTO were analyzed. Thermogr...
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laboratory study on low gas liquid ratio foam flooding for zhuangxi Heavy Oil
Journal of Dispersion Science and Technology, 2011Co-Authors: Guicai Zhang, Baodong Ding, Jijiang Ge, Na Li, Jing Wang, Lei WangAbstract:Considering the high cost and injection pressure of conventional foam flooding, foam flooding with low gas/liquid ratio was proposed to enhance the Heavy Oil recovery. A foamer containing 0.2 wt% α -olefin sulfonate, 0.1 wt% HPAM and 0.5 wt% Na2CO3 was selected for Zhuangxi Heavy Oil. Then the foam stability and low gas/liquid ratio foam flooding were studied via micro model and sand pack experiments. The results indicate that the foam is much more stable in Heavy Oil than in diesel; in flooding tests, this foamer with gas/liquid ratio of 0.2:1 increases the Oil recovery by 39.8%, which is nearly 11% higher than ASP solution in terms of the same injection volume (0.3PV) and agents.
Masahiro Toyoda - One of the best experts on this subject based on the ideXlab platform.
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sorption and recovery of a grade Heavy Oil by using exfoliated graphite packed in plastic bag
Carbon, 2001Co-Authors: Masahiro Toyoda, Naoto Dogawa, Tomonori Seki, Atushi Fujita, Michio InagakiAbstract:For a practical application to recover Heavy Oil, exfoliated graphite packed into a plastic bag and compacted exfoliated graphite were prepared. Their sorption behavior was studied. Exfoliated graphite packed into a polypropylene non-woven bag with a lower bulk density sorbed 40g A-grade Heavy Oil per 1g exfoliated graphite. The sorption of Heavy Oil by the exfoliated graphite compacts showed a little lower sorption capacity than exfoliated graphite packed in the plastic bag. The use of exfoliated graphite packed into a plastic bag seemed to be effective in recovering Heavy Oil spilled on water.
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Heavy Oil sorption using exfoliated graphite new application of exfoliated graphite to protect Heavy Oil pollution
Carbon, 2000Co-Authors: Masahiro Toyoda, Michio InagakiAbstract:Abstract The sorption behaviors of four kinds of Heavy Oils into exfoliated graphites with different bulk densities were studied. The maximum sorption capacity of an exfoliated graphite with a bulk density of 6 kg/m3 was found to be suprisingly high, 86 g of A-grade Heavy Oil and 76 g of crude Oil per 1 g of exfoliated graphite, respectively, and also its sorption occured very rapidly, i.e. within 2 min. Sorption capacity was found to depend strongly on the bulk density and pore volume of the exfoliated graphite and the time it took to reach maximum sorption, as well as sorption capacity, as an exfoliated graphite depended strongly on the grade of Heavy Oil. Heavy Oils sorbed into the exfoliated graphite could be recovered either by a simple compression or suction filtration with a recovery ratio of 60–80%. Recovered Oils showed no difference in molecular weight and hydrocarbon constituent from the original. No increase of the water content in the recovered Oils was detected, suggesting preferential sorption of Heavy Oil into exfoliated graphite. This result indicates clearly that the Oils recovered from the exfoliated graphite can be recycled. From the present work, exfoliated graphite with low bulk density is a promising material for the sorption and recovery of spilled Heavy Oil.
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sorption and recovery of Heavy Oil by using exfoliated graphite
Desalination, 1998Co-Authors: Masahiro Toyoda, Junichi Aizawa, Michio InagakiAbstract:Recent Oil tanker accidents in the sea are very serious, not only since they pollute the environment but also because they release Heavy Oil. An exfoliated graphite was found to sorb Heavy Oil floating on the water and separate it easily from the water. The maximum capacity of sorption of A-grade Heavy Oil reached more than 80 times the weight of the exfoliated graphite used. By simple compression the Heavy Oil sorbed into exfoliated graphite could be recovered, with a maximum yield of recovery being about 80% of the sorbed Oil.
