1 Introduction With almost five years of efforts, we have made major breakthrough and important advances in shale gas in many areas, such as the marine and continental shale in Sichuan Basin, the continental shale in ...1 Introduction With almost five years of efforts, we have made major breakthrough and important advances in shale gas in many areas, such as the marine and continental shale in Sichuan Basin, the continental shale in Erdos Basin and the transitional shale in North China. China has begun shale gas productivity constructions in many shale gas development demonstration areas, such as Chongqing Fuling and Sichuan Changlin-Weiyuan, where early stage large-scale development of shale gas has been started （Zhang, 2010; Li, 2012; Dong et al., 2012; Luo and Li, 2013; Pan and Huang, 2009; Wang, 2014）. China, following U.S. and Canada, has become the third country realizing commercial development of shale gas.展开更多
Micropores of shale are significant to the gas content and production potential of shale, which has been verified in the research of marine shale gas; while, few studies have been conducted on lacustrine shales. This ...Micropores of shale are significant to the gas content and production potential of shale, which has been verified in the research of marine shale gas; while, few studies have been conducted on lacustrine shales. This study collected 42 samples from three wells in the Late Cretaceous Qingshankou Formation of the southern Songliao Basin, NE China, and investigated these samples by the focused ion beam-scanning electron microscope(FIB–SEM) and nitrogen adsorption analysis techniques. Four types of micropores were identified in the samples, i.e., intergranular pore, intracellular pore, organic matter pore and microfracture. The pore structure type is characterized by open slit pores and "ink type" pores which are mainly 1.5–5 nm in diameter with mesopores as the main pores. The mesopores account for 74.01% of the pore volume and 54.68% of the pore surface area. Compared with the lacustrine shales from the Triassic Yanchang Formation in the Ordos Basin and Xujiahe Formation in the Sichuan Basin, the intergranular clay mineral interlayer pores are considered to be the main reservoir space for shale gas storage in the study area, followed by intraparticle pores, organic matter pores and microfractures. Maturity and micropore are the key controlling factors which affect the shale gas content of the Qingshankou Formation in southern Songliao Basin.展开更多
The latest sharp uplift of the Tibetan Plateau and adjacent mountains occurred at the end of the early Pleistocene. The uplift of the Plateau resulted from Late Mesozoic--Cenozoic compressional structure due to the su...The latest sharp uplift of the Tibetan Plateau and adjacent mountains occurred at the end of the early Pleistocene. The uplift of the Plateau resulted from Late Mesozoic--Cenozoic compressional structure due to the subduction of the Indian Plate beneath the Asian continent. This event definitively effected the formation of basin-mountain relief, Cenozoic basin deformation, large scale aridity and desertification of western China. The Australasian meteorites impact event happened ca. 0.8 Ma ago, located in the triangle area of the Indian Ocean ridge (20°S/67°E). The impact may have resulted in an acceleration of speeding of the Indian Ocean ridge pushing the Indian Plate to subduct rapidly northward. Thus, the impact event can give reasonable explanation for the dynamic background of the latest rapid uplift of the Tibetan Plateau and the continental deformation of western China and even of the Middle Asia.展开更多
Southern Songliao basin consists of four A structural units from west to east： western slopes, southwest ridge, central depression and southeast uplift. Upper Cretaceous Qingshankou Formation shale sedimented in larg...Southern Songliao basin consists of four A structural units from west to east： western slopes, southwest ridge, central depression and southeast uplift. Upper Cretaceous Qingshankou Formation shale sedimented in large-scale invasion of the lake, with a quick settlement, super fast filling compensation deposition characteristics and widely deposition of organic-rich, thick black shale interbedded oil shale, which is the most important source rocks on Songliao basin.展开更多
文摘1 Introduction With almost five years of efforts, we have made major breakthrough and important advances in shale gas in many areas, such as the marine and continental shale in Sichuan Basin, the continental shale in Erdos Basin and the transitional shale in North China. China has begun shale gas productivity constructions in many shale gas development demonstration areas, such as Chongqing Fuling and Sichuan Changlin-Weiyuan, where early stage large-scale development of shale gas has been started （Zhang, 2010; Li, 2012; Dong et al., 2012; Luo and Li, 2013; Pan and Huang, 2009; Wang, 2014）. China, following U.S. and Canada, has become the third country realizing commercial development of shale gas.
基金financially supported by the National Natural Science Foundation of China (grant No. 41702171)a National Science and Technology Major Project (grant No. 2016ZX05034002)
文摘Micropores of shale are significant to the gas content and production potential of shale, which has been verified in the research of marine shale gas; while, few studies have been conducted on lacustrine shales. This study collected 42 samples from three wells in the Late Cretaceous Qingshankou Formation of the southern Songliao Basin, NE China, and investigated these samples by the focused ion beam-scanning electron microscope(FIB–SEM) and nitrogen adsorption analysis techniques. Four types of micropores were identified in the samples, i.e., intergranular pore, intracellular pore, organic matter pore and microfracture. The pore structure type is characterized by open slit pores and "ink type" pores which are mainly 1.5–5 nm in diameter with mesopores as the main pores. The mesopores account for 74.01% of the pore volume and 54.68% of the pore surface area. Compared with the lacustrine shales from the Triassic Yanchang Formation in the Ordos Basin and Xujiahe Formation in the Sichuan Basin, the intergranular clay mineral interlayer pores are considered to be the main reservoir space for shale gas storage in the study area, followed by intraparticle pores, organic matter pores and microfractures. Maturity and micropore are the key controlling factors which affect the shale gas content of the Qingshankou Formation in southern Songliao Basin.
基金Supported by Projects of NSFC (Nos. 40872127, 40572135)
文摘The latest sharp uplift of the Tibetan Plateau and adjacent mountains occurred at the end of the early Pleistocene. The uplift of the Plateau resulted from Late Mesozoic--Cenozoic compressional structure due to the subduction of the Indian Plate beneath the Asian continent. This event definitively effected the formation of basin-mountain relief, Cenozoic basin deformation, large scale aridity and desertification of western China. The Australasian meteorites impact event happened ca. 0.8 Ma ago, located in the triangle area of the Indian Ocean ridge (20°S/67°E). The impact may have resulted in an acceleration of speeding of the Indian Ocean ridge pushing the Indian Plate to subduct rapidly northward. Thus, the impact event can give reasonable explanation for the dynamic background of the latest rapid uplift of the Tibetan Plateau and the continental deformation of western China and even of the Middle Asia.
文摘Southern Songliao basin consists of four A structural units from west to east： western slopes, southwest ridge, central depression and southeast uplift. Upper Cretaceous Qingshankou Formation shale sedimented in large-scale invasion of the lake, with a quick settlement, super fast filling compensation deposition characteristics and widely deposition of organic-rich, thick black shale interbedded oil shale, which is the most important source rocks on Songliao basin.
