To study on the significance and basis of acidolysis index to China marine gas hydrate exploring, since 2006, 111 samples derived from Leg 164 and 204 of the Ocean Drilling Program （ODP） were analyzed in the experim...To study on the significance and basis of acidolysis index to China marine gas hydrate exploring, since 2006, 111 samples derived from Leg 164 and 204 of the Ocean Drilling Program （ODP） were analyzed in the experiment center of China Petroleum Exploration Research Institute to obtain data on acidolysis hydrocarbon index and methane carbon isotopes by the gas chromatography （GC） of PE AutoSystem XL and isotope mass spectrometer （IRMS） of Finnigan MAT25 I. Through these, we study the reliability of the acidolysis method and characterize the gas hydrate potential. The results show that the acidolysis hydrocarbon index has a stable correspondence with the Gas Hydrate Stability Zone （GHSZ） in the ODE and that there are clear abnormal signs in shallow samples that might reliably reflect the existence of authigenic carbonate caused by hydrocarbon migration from bottom hydrate. We therefore propose that the ability to characterize the acidolysis hydrocarbon is crucial to submarine gas hydrate exploration in China.展开更多
This paper proposed a topological index S which combined the graph feature and chemical surroundings. It can reflect the essential properties of chemical compounds better. The capacity of distinguishing structural iso...This paper proposed a topological index S which combined the graph feature and chemical surroundings. It can reflect the essential properties of chemical compounds better. The capacity of distinguishing structural isomers of saturated hydrocarbons is high.展开更多
Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buried-hill region,the kerogen type is judged through the pyrolysis and microscopic identification. At the same time,organic matter maturity an...Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buried-hill region,the kerogen type is judged through the pyrolysis and microscopic identification. At the same time,organic matter maturity and hydrocarbon generation threshold are studied by using vitrinite reflectance,pyrolysis yield and hydrocarbon abundance. Meanwhile the hydrocarbon expulsion threshold is calculated. And the characteristics of organic hydrocarbon generation and expulsion are preliminarily revealed and evaluated. The result shows that the No.3 buried-hill region has abundant hydrocarbon source rocks with high content of organic carbon. And the primary types of kerogen areⅡ1and Ⅱ2. The hydrocarbon source rocks which passed biochemistry,thermolysis and thermal cracking have developed into the mature-postmature phase of different extents. And plenty of oil and gas were expelled out. It is believed the depth of oil-generating window is 3 600 m and the depth of hydrocarbon-expulsion threshold is 4 100 m. The comprehensive analysis indicates that Nanpu No.3 burried-hill region has a certain condition to generate hydrocarbon which is very promising in oil exploration and thus can become an important exploration and development target next.展开更多
基金support from the Fluid Geochemical Site Detection Technology of Gas Hydrate(2006AA09204)In-situ Detection Technology of Gas Hydrate(2006AA09205) and (2007AA09Z307)
文摘To study on the significance and basis of acidolysis index to China marine gas hydrate exploring, since 2006, 111 samples derived from Leg 164 and 204 of the Ocean Drilling Program （ODP） were analyzed in the experiment center of China Petroleum Exploration Research Institute to obtain data on acidolysis hydrocarbon index and methane carbon isotopes by the gas chromatography （GC） of PE AutoSystem XL and isotope mass spectrometer （IRMS） of Finnigan MAT25 I. Through these, we study the reliability of the acidolysis method and characterize the gas hydrate potential. The results show that the acidolysis hydrocarbon index has a stable correspondence with the Gas Hydrate Stability Zone （GHSZ） in the ODE and that there are clear abnormal signs in shallow samples that might reliably reflect the existence of authigenic carbonate caused by hydrocarbon migration from bottom hydrate. We therefore propose that the ability to characterize the acidolysis hydrocarbon is crucial to submarine gas hydrate exploration in China.
文摘This paper proposed a topological index S which combined the graph feature and chemical surroundings. It can reflect the essential properties of chemical compounds better. The capacity of distinguishing structural isomers of saturated hydrocarbons is high.
文摘Based on the data of 44 samples of hydrocarbon source rocks in Nanpu No.3 buried-hill region,the kerogen type is judged through the pyrolysis and microscopic identification. At the same time,organic matter maturity and hydrocarbon generation threshold are studied by using vitrinite reflectance,pyrolysis yield and hydrocarbon abundance. Meanwhile the hydrocarbon expulsion threshold is calculated. And the characteristics of organic hydrocarbon generation and expulsion are preliminarily revealed and evaluated. The result shows that the No.3 buried-hill region has abundant hydrocarbon source rocks with high content of organic carbon. And the primary types of kerogen areⅡ1and Ⅱ2. The hydrocarbon source rocks which passed biochemistry,thermolysis and thermal cracking have developed into the mature-postmature phase of different extents. And plenty of oil and gas were expelled out. It is believed the depth of oil-generating window is 3 600 m and the depth of hydrocarbon-expulsion threshold is 4 100 m. The comprehensive analysis indicates that Nanpu No.3 burried-hill region has a certain condition to generate hydrocarbon which is very promising in oil exploration and thus can become an important exploration and development target next.
