Taking the Paleogene Shahejie Formation in Nanpu sag of Bohai Bay Basin as an example,this study comprehensively utilizes seismic,mud logging,well logging,physical property analysis and core thin section data to inves...Taking the Paleogene Shahejie Formation in Nanpu sag of Bohai Bay Basin as an example,this study comprehensively utilizes seismic,mud logging,well logging,physical property analysis and core thin section data to investigate the metamorphic reservoir formed by contact metamorphism after igneous rock intrusion.(1)A geological model of the igneous intrusion contact met amorphic system is proposed,which can be divided into five structural layers vertically:the intrusion,upper metamorphic aureole,lower metamorphic aureole,normal sedimentary layers on the roof and floor.(2)The intrusion is characterized by xenoliths indicating intrusive facies at the top,regular changes in rock texture and mineral crystallization from the center to the edge on a microscopic scale,and low-angle oblique penetrations of the intrusion through sedimentary strata on a macroscopic scale.The metamorphic aureole has characteristics such as sedimentary rocks as the host rock,typical palimpsest textures developed,various low-temperature thermal metamorphic minerals developed,and medium-low grade thermal metamorphic rocks as the lithology.(3)The reservoir in contact metamorphic aureole has two types of reservoir spaces:matrix pores and fractures.The matrix pores are secondary"intergranular pores"distributed around metamorphic minerals after thermal metamorphic transformation in metasandstones.The fractures are mainly structural fractures and intrusive compressive fractures in metamudstones.The reservoirs generally have three spatial distribution characteristics:layered,porphyritic and hydrocarbon impregnation along fracture.(4)The distribution of reservoirs in the metamorphic aureole is mainly controlled by the intensity of thermal baking.Furthermore,the distribution of favorable reservoirs is controlled by the coupling of favorable lithofacies and thermal contact metamorphism,intrusive compression and hydrothermal dissolution.The proposal and application of the geological model of the intrusion contact metamorphic system are expected to promote the discovery of exploration targets of contact metamorphic rock in Nanpu sag,and provide a reference for the study and exploration of deep contact metamorphic rock reservoirs in the Bohai Bay Basin.展开更多
Gen.Surasit Thanadtang,director of the Thai-Chinese Strategic Research Center at the National Research Council of Thailand,has been a regular visitor to China and developed his own unique views on China’s development...Gen.Surasit Thanadtang,director of the Thai-Chinese Strategic Research Center at the National Research Council of Thailand,has been a regular visitor to China and developed his own unique views on China’s development,targeted poverty alleviation,bilateral cooperation with Thailand and many other issues.Recently,he sat down for an exclusive interview with China Report ASEAN.展开更多
“What kind of garbage are you throwing away?”So goes a special phrase heard by most Shanghai residents from volunteers at household waste disposal sites across the city when they toss away trash.Amusingly,the greeti...“What kind of garbage are you throwing away?”So goes a special phrase heard by most Shanghai residents from volunteers at household waste disposal sites across the city when they toss away trash.Amusingly,the greeting sounds similar to“What kind of garbage are you?”in the Shanghai dialect.Bizarre as it may seem,this conversation is likely to become a nationwide dialogue soon as China rigorously endeavors to popularize mandatory separation of garbage in up to 46 cities across the country.The number of cities,according to many advocates,is set to surge as garbage sorting becomes a long-term environmental undertaking practiced across the Chinese mainland.Efforts in the eastern Chinese metropolis of Shanghai are just the start.展开更多
基金Supported by the Basic Science Research Fund Project of PetroChina Affiliated Institute(2020D-5008-06)。
文摘Taking the Paleogene Shahejie Formation in Nanpu sag of Bohai Bay Basin as an example,this study comprehensively utilizes seismic,mud logging,well logging,physical property analysis and core thin section data to investigate the metamorphic reservoir formed by contact metamorphism after igneous rock intrusion.(1)A geological model of the igneous intrusion contact met amorphic system is proposed,which can be divided into five structural layers vertically:the intrusion,upper metamorphic aureole,lower metamorphic aureole,normal sedimentary layers on the roof and floor.(2)The intrusion is characterized by xenoliths indicating intrusive facies at the top,regular changes in rock texture and mineral crystallization from the center to the edge on a microscopic scale,and low-angle oblique penetrations of the intrusion through sedimentary strata on a macroscopic scale.The metamorphic aureole has characteristics such as sedimentary rocks as the host rock,typical palimpsest textures developed,various low-temperature thermal metamorphic minerals developed,and medium-low grade thermal metamorphic rocks as the lithology.(3)The reservoir in contact metamorphic aureole has two types of reservoir spaces:matrix pores and fractures.The matrix pores are secondary"intergranular pores"distributed around metamorphic minerals after thermal metamorphic transformation in metasandstones.The fractures are mainly structural fractures and intrusive compressive fractures in metamudstones.The reservoirs generally have three spatial distribution characteristics:layered,porphyritic and hydrocarbon impregnation along fracture.(4)The distribution of reservoirs in the metamorphic aureole is mainly controlled by the intensity of thermal baking.Furthermore,the distribution of favorable reservoirs is controlled by the coupling of favorable lithofacies and thermal contact metamorphism,intrusive compression and hydrothermal dissolution.The proposal and application of the geological model of the intrusion contact metamorphic system are expected to promote the discovery of exploration targets of contact metamorphic rock in Nanpu sag,and provide a reference for the study and exploration of deep contact metamorphic rock reservoirs in the Bohai Bay Basin.
文摘Gen.Surasit Thanadtang,director of the Thai-Chinese Strategic Research Center at the National Research Council of Thailand,has been a regular visitor to China and developed his own unique views on China’s development,targeted poverty alleviation,bilateral cooperation with Thailand and many other issues.Recently,he sat down for an exclusive interview with China Report ASEAN.
文摘“What kind of garbage are you throwing away?”So goes a special phrase heard by most Shanghai residents from volunteers at household waste disposal sites across the city when they toss away trash.Amusingly,the greeting sounds similar to“What kind of garbage are you?”in the Shanghai dialect.Bizarre as it may seem,this conversation is likely to become a nationwide dialogue soon as China rigorously endeavors to popularize mandatory separation of garbage in up to 46 cities across the country.The number of cities,according to many advocates,is set to surge as garbage sorting becomes a long-term environmental undertaking practiced across the Chinese mainland.Efforts in the eastern Chinese metropolis of Shanghai are just the start.
