In this work,the solubilities of carbamazepine(CBZ)(form III)in ethyl acetate,methyl acetate,ethylene glycol,chloroform and cyclohexylamine were determined by laser monitoring techniques at pressure above sea level,an...In this work,the solubilities of carbamazepine(CBZ)(form III)in ethyl acetate,methyl acetate,ethylene glycol,chloroform and cyclohexylamine were determined by laser monitoring techniques at pressure above sea level,and the solubility data of CBZ(form III)in different pure solvents were fitted by the Modified Apelblat model andλh model.The result shows that the solubility of CBZ(form III)in five solvents increases as temperature rises,and the solubility in chloroform was the largest.The experimental solubility values of CBZ(form III)in ethyl acetate,methyl acetate,chloroform and cyclohexylamine were in better agreement with the simulated fitting values of theλh model.For ethylene glycol,the r value was much larger than the other four solvents,and it can be seen from theλh model that ethylene glycol was closer to the ideal solution system than the other four solvents.展开更多
The Sèmè oilfield is located in Benin’s offshore coastal sedimentary basin, near the Benin-Nigeria border, and contains two important oil bearing structures called “Sèmè North” and “Sèm...The Sèmè oilfield is located in Benin’s offshore coastal sedimentary basin, near the Benin-Nigeria border, and contains two important oil bearing structures called “Sèmè North” and “Sèmè South”. In this coastal basin, Turonian sandstones of Abeokuta formation (Cenomanian-Turonian to Early Senonian age) form two reservoir units differentiated by two seismic horizons H6 and H6.5. The H6 seismic horizon represents the upper reservoir unit and is the main reservoir from which, more than 22 million barrels of crude oil had previously been produced in Sèmè oilfield. In order to improve knowledge of field petroleum geology, the present study presents the structural features of this upper reservoir unit. The use of Petrel software modules for the integration of 15 wells data, allowed presenting a structural model and illustrative cross sections that precise the geometry and specifying the structural characteristics of this reservoir unit within Sèmè field. The displayed structural architecture shows that the upper Turonian sandstones unit is composed of 11 layers including 7 reservoir layers (A, B, C1, C2, D1, D2, E) and 4 intra-reservoir layers (1, 2, 3 and 4) controlled by faults systems. The model provides basic framework necessary for geological characterization of the reservoir through a static model. The results of this study can be used for petrophysical modeling, Gross Rock Volume (GRV) determination and technical redevelopment of the field.展开更多
文章主要研究了安徽省某气象台站年平均气温、月平均气温的结构性变化情况。该文在对气温数据进行正态性检验的基础上,运用ASAMC(annealing stochastic approximation Monte Carlo)算法对气温数据进行统计分析,估计出平均气温结构性变...文章主要研究了安徽省某气象台站年平均气温、月平均气温的结构性变化情况。该文在对气温数据进行正态性检验的基础上,运用ASAMC(annealing stochastic approximation Monte Carlo)算法对气温数据进行统计分析,估计出平均气温结构性变化的位置,并探索发生结构性变化的气象因素和非气象因素。展开更多
基金The authors would like to thank the Science Foundation of Henan University of Technology (2017RCJH09,2017QNJH29)Science Foundation of Henan Province (202102310208,182102210399) for their financial assistance in this project。
文摘In this work,the solubilities of carbamazepine(CBZ)(form III)in ethyl acetate,methyl acetate,ethylene glycol,chloroform and cyclohexylamine were determined by laser monitoring techniques at pressure above sea level,and the solubility data of CBZ(form III)in different pure solvents were fitted by the Modified Apelblat model andλh model.The result shows that the solubility of CBZ(form III)in five solvents increases as temperature rises,and the solubility in chloroform was the largest.The experimental solubility values of CBZ(form III)in ethyl acetate,methyl acetate,chloroform and cyclohexylamine were in better agreement with the simulated fitting values of theλh model.For ethylene glycol,the r value was much larger than the other four solvents,and it can be seen from theλh model that ethylene glycol was closer to the ideal solution system than the other four solvents.
文摘The Sèmè oilfield is located in Benin’s offshore coastal sedimentary basin, near the Benin-Nigeria border, and contains two important oil bearing structures called “Sèmè North” and “Sèmè South”. In this coastal basin, Turonian sandstones of Abeokuta formation (Cenomanian-Turonian to Early Senonian age) form two reservoir units differentiated by two seismic horizons H6 and H6.5. The H6 seismic horizon represents the upper reservoir unit and is the main reservoir from which, more than 22 million barrels of crude oil had previously been produced in Sèmè oilfield. In order to improve knowledge of field petroleum geology, the present study presents the structural features of this upper reservoir unit. The use of Petrel software modules for the integration of 15 wells data, allowed presenting a structural model and illustrative cross sections that precise the geometry and specifying the structural characteristics of this reservoir unit within Sèmè field. The displayed structural architecture shows that the upper Turonian sandstones unit is composed of 11 layers including 7 reservoir layers (A, B, C1, C2, D1, D2, E) and 4 intra-reservoir layers (1, 2, 3 and 4) controlled by faults systems. The model provides basic framework necessary for geological characterization of the reservoir through a static model. The results of this study can be used for petrophysical modeling, Gross Rock Volume (GRV) determination and technical redevelopment of the field.
文摘文章主要研究了安徽省某气象台站年平均气温、月平均气温的结构性变化情况。该文在对气温数据进行正态性检验的基础上,运用ASAMC(annealing stochastic approximation Monte Carlo)算法对气温数据进行统计分析,估计出平均气温结构性变化的位置,并探索发生结构性变化的气象因素和非气象因素。
