Numerous moundy reflections were found at the Upper Meishan Formation in southern Qiongdongnan Basin, South China Sea which are suspected reefs. However, no common understanding on the seismic and geologic interpretat...Numerous moundy reflections were found at the Upper Meishan Formation in southern Qiongdongnan Basin, South China Sea which are suspected reefs. However, no common understanding on the seismic and geologic interpretation was acquired. Based on seismic reflection identification, geometrical configuration description, wave impedance inversion, forward simulation, analysis of reef-building sedimentary environments and pseudomorph identification, these suspected-reef moundy reflections were studied in details.Three types of reefs were recognized, i.e., patch reef, platform-edge reef, and pinnacle reef. They have some typical characteristics of reefs, including moundy or lenticular shape, clear outline with crest and canal, internal foreset bedding, bidirectional uplap between limbs, and strong reflection at top and bottom. The patch reefs are of moundy seismic facies, with moderateestrong amplitude and moderate frequency, and distribute at the higher part of southern slope belt. Fore-reef and back-reef of patch reefs are slightly asymmetrical being perpendicular to palaeo-bathymetric orientation; while symmetrical to slightly asymmetrical being parallel to the palaeo-bathymetric orientation, and the wave impedance value is about 7 kg/m^3×m/s.Platform-edge reefs are of flat-moundy seismic facies with strong amplitude and moderate frequency, which develop at the carbonate platform edge of higher part of southern slope belt, and the wave impedance value is about 7.5 kg/m^3×m/s. Pinnacle reefs grow up on volcanic cones, forming the complex of pinnacle reef and volcanic cone. The Miocene Meishan Formation reefs in southern Qiongdongnan Basin, northern South China Sea, with high quality sourceereservoireseal assemblages, have good petroleum exploration prospects.展开更多
Pinnacle studio 17下附带子程序Live Screen Capture的屏幕捕捉功能即可完成多媒体视频课件的制作,快速完成多媒体视频课件的制作方法以便教学应用,此软件操作方法简单易上手,能够快速完成多媒体视频课件的制作,是比较实用的医学多媒...Pinnacle studio 17下附带子程序Live Screen Capture的屏幕捕捉功能即可完成多媒体视频课件的制作,快速完成多媒体视频课件的制作方法以便教学应用,此软件操作方法简单易上手,能够快速完成多媒体视频课件的制作,是比较实用的医学多媒体视频课件制作方法.展开更多
He designed the national emblem of thePeople’s depublic of China, was a primary painterof the mural in the Beijing Capital Airport, ananimator of "Ne Zha Makes Havoc of the Sea", arenowned cartoonist, one o...He designed the national emblem of thePeople’s depublic of China, was a primary painterof the mural in the Beijing Capital Airport, ananimator of "Ne Zha Makes Havoc of the Sea", arenowned cartoonist, one of the founders of展开更多
基金National Science and Technology Major Project of China (No. 2016ZX05026-007)National Natural Science Foundation of China (No. 41502081)
文摘Numerous moundy reflections were found at the Upper Meishan Formation in southern Qiongdongnan Basin, South China Sea which are suspected reefs. However, no common understanding on the seismic and geologic interpretation was acquired. Based on seismic reflection identification, geometrical configuration description, wave impedance inversion, forward simulation, analysis of reef-building sedimentary environments and pseudomorph identification, these suspected-reef moundy reflections were studied in details.Three types of reefs were recognized, i.e., patch reef, platform-edge reef, and pinnacle reef. They have some typical characteristics of reefs, including moundy or lenticular shape, clear outline with crest and canal, internal foreset bedding, bidirectional uplap between limbs, and strong reflection at top and bottom. The patch reefs are of moundy seismic facies, with moderateestrong amplitude and moderate frequency, and distribute at the higher part of southern slope belt. Fore-reef and back-reef of patch reefs are slightly asymmetrical being perpendicular to palaeo-bathymetric orientation; while symmetrical to slightly asymmetrical being parallel to the palaeo-bathymetric orientation, and the wave impedance value is about 7 kg/m^3×m/s.Platform-edge reefs are of flat-moundy seismic facies with strong amplitude and moderate frequency, which develop at the carbonate platform edge of higher part of southern slope belt, and the wave impedance value is about 7.5 kg/m^3×m/s. Pinnacle reefs grow up on volcanic cones, forming the complex of pinnacle reef and volcanic cone. The Miocene Meishan Formation reefs in southern Qiongdongnan Basin, northern South China Sea, with high quality sourceereservoireseal assemblages, have good petroleum exploration prospects.
文摘He designed the national emblem of thePeople’s depublic of China, was a primary painterof the mural in the Beijing Capital Airport, ananimator of "Ne Zha Makes Havoc of the Sea", arenowned cartoonist, one of the founders of
