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| 1 | Synthesis and evaluation of an oil-soluble viscosity reducer for heavy oil显示文摘To reduce the viscosity of highly-viscous oil of the Tahe oilfield (Xinjiang,China),an oilsoluble polybasic copolymer viscosity reducer for heavy oil was synthesized using the orthogonal method.The optimum reaction conditions are obtained as follows:under the protection of nitrogen,a reaction time of 9 h,monomer mole ratio of reaction materials of 3:2:2 (The monomers are 2-propenoic acid,docosyl ester,maleic anhydride and styrene,respectively),initiator amount of 0.8% (mass percent of the sum of all the monomers) and reaction temperature of 80 oC.This synthesized viscosity reducer is more effective than commercial viscosity reducers.The rate of viscosity reduction reached 95.5% at 50 oC.Infrared spectra (IR) and interfacial tensions of heavy oil with and without viscosity reducer were investigated to understand the viscosity reduction mechanism.When viscosity reducer is added,the molecules of the viscosity reducer are inserted amongst the molecules of crude oil,altering the original intermolecular structure of crude oil and weakening its ability to form hydrogen bonds with hydroxyl or carboxyl groups,so the viscosity of crude oil is reduced.Field tests of the newly developed oil-soluble viscosity reducer was carried out in the Tahe Oilfield,and the results showed that 44.5% less light oil was needed to dilute the heavy oil to achieve the needed viscosity. | Guo Jixiang Wang Heyi Chen Chaogang Chen Yun Xie Xiaohai | 2010 | Petroleum Science2010，7，4： | 24 |
| 2 | Influences of water treatment agents on oil-water interfacial properties of oilfield produced water显示文摘The emulsion stability of oilfield produced water is related to the oil-water interfacial film strength and the zeta potential of the oil droplets. We investigated the effects of water treatment agents (corrosion inhibitor SL-2, scale inhibitor HEDP, germicide 1227, and flocculant polyaluminium chloride PAC) on the stability of oilfield produced water. The influence of these treatment agents on oil-water interfacial properties and the mechanism of these agents acting on the oilfield produced water were studied by measuring the interfacial shear viscosity, interfacial tension and zeta electric potential. The results indicated that the scale inhibitor HEDP could increase the oil-water interfacial film strength, and it could also increase the absolute value of the zeta potential of oil droplets. HEDP played an important role in the stability of the emulsion. Polyaluminum chloride (PAC) reduced the stability of the emulsion by considerably decreasing the absolute value of the zeta potential of oil droplets. Corrosion inhibitor SL-2 and germicide 1227 could decrease the oil-water interfacial tension, whereas they had little influence on oil-water interfacial shear viscosity and oil-water interfacial electricity properties. | Guo Jixiang Cao Jingjing Li Mingyuan Xia Haiying | 2013 | Petroleum Science2013，10，3： | 9 |
| 3 | Crosstalk-free achromatic full Stokes imaging polarimetry metasurface enabled by polarization-dependent phase optimization显示文摘Imaging polarimetry is one of the most widely used analytical technologies for object detection and analysis.To date,most metasurface-based polarimetry techniques are severely limited by narrow operating bandwidths and inevitable crosstalk,leading to detrimental effects on imaging quality and measurement accuracy.Here,we propose a crosstalkfree broadband achromatic full Stokes imaging polarimeter consisting of polarization-sensitive dielectric metalenses,implemented by the principle of polarization-dependent phase optimization.Compared with the single-polarization optimization method,the average crosstalk has been reduced over three times under incident light with arbitrary polarization ranging from 9μm to 12μm,which guarantees the measurement of the polarization state more precisely.The experimental results indicate that the designed polarization-sensitive metalenses can effectively eliminate the chromatic aberration with polarization selectivity and negligible crosstalk.The measured average relative errors are 7.08%,8.62%,7.15%,and 7.59%at 9.3,9.6,10.3,and 10.6μm,respectively.Simultaneously,the broadband full polarization imaging capability of the device is also verified.This work is expected to have potential applications in wavefront detection,remote sensing,light-field imaging,and so forth. | Yaxin Zhang Mingbo Pu Jinjin Jin Xinjian Lu Yinghui Guo Jixiang Cai Fei Zhang Yingli Ha Qiong He Mingfeng Xu Xiong Li Xiaoliang Ma Xiangang Luo | 2022 | Opto-Electronic Advances2022，5，11： | 6 |
| 4 | Influence of polymers on the stability of Gudao crude oil emulsions显示文摘The influence of different types and concentrations of polymers on the stability of Gudao crude oil emulsion was investigated by measuring the volume of water separated from the emulsions and the interfacial shear viscosity of the oil/water interfacial film.Experimental results indicate that the simulated water-in-oil emulsion with 40 mg/L of partially hydrolyzed polyacrylamide(HPAM)3530S could be easily broken by adding demulsifier C and was readily separated into two layers.However, HPAM AX-74H and hydrophobically associating water-soluble polymer(HAP)could stabilize the crude oil emulsion.With increasing concentration of AX-74H and HAP,crude oil emulsions became more stable.Water droplets were loosely packed in the water-in model oil emulsion containing HPAM 3530S, but water droplets were smaller and more closely packed in the emulsion containing AX-74H or HAP.The polymers could be adsorbed on the oil/water interface,thereby increasing the strength of the interfacial film and enhancing the emulsion stability. | Lin Meiqin Zhang Chunling Zong Hua Li Mingyuan Fang Hongbo Guo Jixiang | 2008 | Petroleum Science2008，5，2： | 6 |
| 5 | Treatment of drilling wastewater from a sulfonated mud system显示文摘Treatment of drilling wastewater from a sulfonated drilling mud system in the Shengli Oilfield, East China, was studied. The wastewater was deeply treated by a chemical coagulation-centrifugal separation-ozone catalytic oxidation combined process. The factors (i.e. pH value, chemical dosage, reaction time, etc.) influencing the treatment effect were investigated, and pH = 7 was determined as optimal for the coagulation; polymeric aluminum chloride (PAC) was selected as the optimal coagulant with a dosage of 18 g/L; cationic polyacrylamide (CPAM) with molecular weight of 8 million was selected as the optimal coagulant aid with an optimum dosage of 8 mg/L; and the optimal condition of catalytic ozonation was found to be a pH of 12 and an oxidation time of 40 min. The results showed that the combined treatment process was effective. The oil content and suspended solids content of the effluent reached the first class discharge standard according to China's standard GB 8978-1996 (Integrated Wastewater Discharge Standard) and the chemical oxygen demand (COD) decreased to 195 mg/L from 2.34×10 4 mg/L after coagulation process and ozone oxidation at pH = 12 for 40 min. | Guo Jixiang Cui Yongjie Cao Jingjing | 2013 | Petroleum Science2013，10，1： | 6 |
| 6 | Study of asphaltene deposition from Tahe crude oil显示文摘Borehole blockage caused by asphaltene deposition is a problem in crude oil production in the Tahe Oilfield, Xinjiang, China. This study has investigated the influences of crude oil compositions, temperature and pressure on asphaltene deposition. The asphaltene deposition trend of crude oil was studied by saturates, aromatics, resins and asphaltenes (SARA) method, and the turbidity method was applied for the first time to determine the onset of asphaltene flocculation. The results showed that the asphaltene deposition trend of crude oil by the turbidity method was in accordance with that by the SARA method. The asphaltene solubility in crude oil decreased with decreasing temperature and the amount of asphaltene deposits of T739 crude oil (from well T739, Tahe Oilfield) had a maximum value at 60 o C. From the PVT results, the bubble point pressure of TH10403CX crude oil (from well TH10403CX, Tahe Oilfield) at different temperatures can be obtained and the depth at which the maximum asphaltene flocculation would occur in boreholes can be calculated. The crude oil PVT results showed that at 50 , 90 and 130 o C, the bubble point pressure of TH10403CX crude oil was 25.2, 26.4 and 27.0 MPa, respectively. The depth of injecting asphaltene deposition inhibitors for TH10403CX was determined to be 2,700 m. | CHEN Chaogang GUO Jixiang AN Na REN Bo LI Yaguang JIANG Qingzhe | 2013 | Petroleum Science2013，10，1： | 5 |
| 7 | Synthesis of temperature-resistant and salttolerant surfactant SDB-7 and its performance evaluation for Tahe Oilfield flooding (China)显示文摘In order to improve the enhanced oil recovery of high-temperature and high-salt oilfields, a novel temperature-resistant and salt-tolerant surfactant(denoted as SDB-7) was synthesized and evaluated for the Tahe Oilfield(Xinjiang, China), which is representative of high-temperature and high-salt oilfields. It has a central reservoir temperature of 140 °C and salinity of 22.6×104 mg/L. The temperature-resistant and salt-tolerant performance, interfacial activity, oil displacement efficiency, aging properties, and adsorption properties of the synthesized surfactant were evaluated for Tahe Oilfield flooding. The results showed that the SDB-7 was temperature-resistant and salt-tolerant capacity of 140 °C and 22.6×104 mg/L, respectively, oil displacement efficiency under static condition of 84%, and adsorption loss of 0.4 mg/g(less than 1 mg/g-oil sand). In the heat aging experiment(under the temperature of 140 °C for 60 days), the oil-water interfacial tension and oil displacement efficiency of SDB-7 were almost unchanged. The oil displacement experiments showed that, under the temperature of 140 °C and the salinity of 22.6×104 mg/L, the surfactant SDB-7 can enhance oil recovery by 14.5% after water flooding,suggesting that SDB-7 has a promising application in high temperature and high salinity(HT/HS) reservoir. | Guo Jixiang Shi Xiao Yang Zuguo Cao Jingjing Wang Lei Yin Ying | 2014 | Petroleum Science2014，11，4： | 4 |
| 8 | Experimental study on the effects of drying methods on the stabilities of lignite显示文摘The drying processes are always applied prior to the transportation or utilization of lignite, and result in notable changes in the stabilities of lignite. In this paper, the study on the effects of nitrogen and MTE drying process on the physico-chemical properties and stabilities of Zhaotong lignite was carried out. The briquettes produced by MTE drying in this study were 150 mm in dimension, and so had a much larger particle size than nitrogendried samples. Nitrogen adsorption, mercury intrusion porosimetry and scanning electron microscopy all suggested that drying was accompanied by the transformation of larger pores into smaller ones. Compared to nitrogen drying, the pore structures could be stabilized by the MTE process. The soluble salts were removed during MTE drying which resulted in the decrease in ash and the concentrations of some of the major metals.The removal of water enhanced the hydrophilicity of nitrogen dried samples, but did not affect the hydrophilicity of MTE dried samples. The moisture holding capacity of MTE dried samples reduced faster than nitrogen dried samples with the decrease of residual moisture content. The moisture readsorption processes of MTE dried samples were strongly inhibited due to the much larger particle size of sample produced by MTE drying than nitrogen drying. The susceptibility to spontaneous combustion, indicated by cross point temperature and self-heating tests, of nitrogen and MTE dried samples increased with the decrease of residual moisture content. The MTE dried samples are more liable to spontaneous combustion than nitrogen dried samples with the same residual moisture and particle size. However, the larger particle size of the MTE product made it more stable with respect to spontaneous combustion and also moisture readsorption. | Yixin Zhang Jixiang Dong Fanhui Guo Xiaokai Chen Jianjun Wu Zhenyong Miao | 2018 | Chinese Journal of Chemical Engineering2018，26，7： | 4 |
| 9 | A surgical simulation system for predicting facial soft tissue deformation显示文摘In the field of cranio-maxillofacial(CMF)surgery, surgical simulation is becoming a very powerful tool to plan surgery and simulate surgical results before actually performing a CMF surgical procedure.Reliable prediction of facial soft tissue changes is in particular essential for better preparation and to shorten the time taken for the operation. This paper presents a surgical simulation system to predict facial soft tissue changes caused by the movement of bone segments during CMF surgery. Two experiments were designed to test the feasibility of this simulation system. The test results demonstrate the feasibility of fast and good prediction of post-operative facial appearance, with texture. Our surgical simulation system is applicable to computer-assisted CMF surgery. | Xiaodong Tang Jixiang Guo Peng Li Jiancheng Lv | 2016 | Computational Visual Media2016，2，2： | 2 |
| 10 | Association between the Pro12Ala polymorphism of PPAR-γ gene and the non-alcoholic fatty liver disease: A meta-analysis显示文摘 | Jun Wang Xufeng Guo Pengbo Wu Jia Song Chuncui Ye Shijie Yu Jixiang Zhang Weiguo Dong | 2013 | Gene2013，，： | 2 |
| 11 | Study of asphaltene dispersion and removal for high-asphaltene oil wells显示文摘Many wellbores are blocked by asphaltene deposits,which lead to production problems in the oilfield development process.In this paper,methods such as elemental analysis,and solvent extraction are adopted for the study of wellbore blockages.The content of organic matter in blockages is higher than 96% and asphaltene is the main component of the organic matter with n-heptane asphaltene content of 38%.Based on the above analyses,an agent for asphaltene dispersion and removal(named as SDJ) was developed.The performance of the SDJ agent was evaluated,and it was found that the dissolution rate of asphaltene can reach 2.9 mg.mL-1.min-1 at 60 oC.SDJ agent(1wt%) was added to crude oil with a colloid instability index greater than 0.9 can effectively inhibit asphaltene deposition in the wellbore.By the viscosity method,the dissolution amount of SDJ agent was calculated,and it was found that when the viscosity of the system is around 2,000 mPa.s(the common viscosity of crude oil),the amount of SDJ agent added to the blockage was at least 96 g per 100 g blockages.Therefore,SDJ agent has promising application for dispersion and removal of asphaltene deposition in high-asphaltene wells. | Chen Chaogang Guo Jixiang An Na Pan Yangqiu Li Yaguang Jiang Qingzhe | 2012 | Petroleum Science2012，9，4： | 1 |
| 12 | The Effect of Alkali on Crude Oil/Water Interfacial Properties and the Stability of Crude Oil Emulsions 显示文摘 | GUO Jixiang Liu Qing Li Mingyuan | 2006 | Colloids and Surfaces2006，273，： | 1 |
| 13 | Association between the Pro12Ala polymorphism of PPAR-γ gene and the non-alcoholic fatty liver disease: A meta-analysis显示文摘 | Jun Wang Xufeng Guo Pengbo Wu Jia Song Chuncui Ye Shijie Yu Jixiang Zhang Weiguo Dong | 2013 | Gene2013，，： | 1 |
| 14 | The application of artificial intelligence and radiomics in lung cancer显示文摘Lung cancer is one of the most leading causes of death throughout the world,and there is an urgent requirement for the precision medical management of it.Artificial intelligence(AI)consisting of numerous advanced techniques has been widely applied in the field of medical care.Meanwhile,radiomics based on traditional machine learning also does a great job in mining information through medical images.With the integration of AI and radiomics,great progress has been made in the early diagnosis,specific characterization,and prognosis of lung cancer,which has aroused attention all over the world.In this study,we give a brief review of the current application of AI and radiomics for precision medical management in lung cancer. | Yaojie Zhou Xiuyuan Xu Lujia Song Chengdi Wang Jixiang Guo Zhang Yi Weimin Li | 2020 | Precision Clinical Medicine2020，3，3： | 1 |
| 15 | Studies on properties of interfacial active fractions from crude and their effect on stability of crude emulsions显示文摘 | Li Mingyuan Guo Jixiang Lin Meiqin | 2006 | J Disp Sci Technol2006，27，5： | 1 |
| 16 | The effect of alkali on crude oil/water interfacial properties and the stability of crude oil emulsions 显示文摘 | Guo Jixiang Liu Qing Li Mingyuan | 2006 | Colloids Surfaces A: Physieochem Engng Aspects2006，273，13： | 1 |
| 17 | Studies on properties of interfacial active fractions from crude and their effect on stability of crude emulsions 显示文摘 | LI MINGYUAN GUO JIXIANG LIN MEIQIN | 2006 | Journal of Dispersion Science and Technology2006，27，： | 1 |
| 18 | Studies on Properties of Interracial Active Fractions from Crude and Their Effect on Stability of Crude Emulsions 显示文摘 | Li Mingyuan Guo Jixiang Lin Meiqin | 2006 | J Dispersion Sci Technol2006，27，3： | 1 |
| 19 | The effect of alkali on crude oil/water intedacial properties and the stability of crude oil emulsions显示文摘 | GUO Jixiang LIU Qing LI Mingyuan | 2006 | Colloids and Surfaces2006，273，： | 1 |
| 20 | The effect of alkali on crude oil/water interfacial properties and the stability of crude oil emulsions显示文摘 | Jixiang Guo Qing Liu Mingyuan Li | 2006 | Colloids and Surfaces2006，273，： | 1 |
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