The study of the chlorite coatings always attracts scholars in China and other countries because the chlorite coatings play an important role in the preservation of residual primary pores in sandstone reservoirs.At pr...The study of the chlorite coatings always attracts scholars in China and other countries because the chlorite coatings play an important role in the preservation of residual primary pores in sandstone reservoirs.At present,the study of the origin and the controlling factors is relatively few.The occurrence,time of formation,genesis,controlling factors,and the mechanism of chlorite coatings inhibiting quartz overgrowths were studied in detail with thin section and SEM analysis.Samples were from the sandstone reservoirs of the T3x Group in the Baojie area,the transitional zone from the middle to the south of Sichuan Basin.The results indicate that the chlorite coatings on the walls of the pore spaces are oriented perpendicular to grain surfaces in the form of isopachous(even-thickness) grain-coating,while the chlorite coatings at the contacts between adjacent detrital grains are arranged with a preferred orientation tangential to the surface of detrital grains.The chlorite coatings were formed in the eogenetic stage.They were formed by recrystallization of Fe-rich clay films during the syndepositional period,and chlorite cements would be recrystallized after the coatings’ formation.The formation of chlorite coatings was mainly controlled by the depositional environment,provenance conditions,and diagenetic environment.The presence of chlorite coatings could result in the preservation of primary pores in deeply buried sandstone reservoirs by effectively inhibiting quartz overgrowths and the development of compaction and pressure solution.展开更多
Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve s...Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve students'originality has become one of the hot topics in Chinese education forum. Beginning with analyzing different foreign language teaching approaches in foreign countries and the general language teaching situation in China, this article holds that enhancing teachers'qualification, analyzing the factors that influ ence students'originality, creating positive classroom atmosphere and conducting creative class activities are indispensable measures of im proving students'originality in classroom teaching.展开更多
基金supported by the Natural Science Key Project of Education Board in Sichuan province,China (No.07ZA139)
文摘The study of the chlorite coatings always attracts scholars in China and other countries because the chlorite coatings play an important role in the preservation of residual primary pores in sandstone reservoirs.At present,the study of the origin and the controlling factors is relatively few.The occurrence,time of formation,genesis,controlling factors,and the mechanism of chlorite coatings inhibiting quartz overgrowths were studied in detail with thin section and SEM analysis.Samples were from the sandstone reservoirs of the T3x Group in the Baojie area,the transitional zone from the middle to the south of Sichuan Basin.The results indicate that the chlorite coatings on the walls of the pore spaces are oriented perpendicular to grain surfaces in the form of isopachous(even-thickness) grain-coating,while the chlorite coatings at the contacts between adjacent detrital grains are arranged with a preferred orientation tangential to the surface of detrital grains.The chlorite coatings were formed in the eogenetic stage.They were formed by recrystallization of Fe-rich clay films during the syndepositional period,and chlorite cements would be recrystallized after the coatings’ formation.The formation of chlorite coatings was mainly controlled by the depositional environment,provenance conditions,and diagenetic environment.The presence of chlorite coatings could result in the preservation of primary pores in deeply buried sandstone reservoirs by effectively inhibiting quartz overgrowths and the development of compaction and pressure solution.
文摘Economic invigoration relies on education. With the rapid advancement of science and technology and the fast development of society, more and more demand has been put on fostering talented people. And how to improve students'originality has become one of the hot topics in Chinese education forum. Beginning with analyzing different foreign language teaching approaches in foreign countries and the general language teaching situation in China, this article holds that enhancing teachers'qualification, analyzing the factors that influ ence students'originality, creating positive classroom atmosphere and conducting creative class activities are indispensable measures of im proving students'originality in classroom teaching.
