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Structural Evolution and Hydrocarbon Potential of the Upper Paleozoic northern ordos basin, North China

Acta Geologica Sinica(English Edition) 2015年第5期89卷 1636-1648页

作者： YANG Minghui LI Liang ZHOU Jin JIA Huichong SUN Xiao GONG Ting DING Chao State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum College of Geosciences China University of Petroleum North China Company SINOPEC No.3 Brigade of Jiangsu Geology & Mineral Resources Bureau China Railway Resources Exploration Co. LTD Henan Earthquake Administration

The hydrocarbon potential of the Hangjinqi area in the northern ordos basin is not well known, compared to the other areas of the basin, despite its substantial petroleum *** of a depth-converted seismic profile across the Hangjinqi Fault Zone（HFZ） in the eastern Hangjinqi area shows one compression that created anticlinal structures in the Late Triassic, and two extensions in ~Middle Jurassic and Late Early Cretaceous, which were interrupted by inversions in the Late Jurassic–Early Early Cretaceous and Late Cretaceous, *** generation at the well locations in the Central ordos basin（COB） began in the Late *** modeling of Well Zhao-4 suggests that hydrocarbon generation from the Late Carboniferous–Early Permian coal measures of the northern Shanbei Slope peaked in the Early Cretaceous, predating the inversion in the Late *** source rocks in the Shanbei Slope passed the main gas-migration phase except for the Hangjinqi area source rocks（Well Jin-48）.Hydrocarbons generated from the COB are likely to have migrated northward toward the anticlinal structures and traps along the HFZ because the basin-fill strata are dipping *** that continued during the extensional phase（Late Early Cretaceous） of the Hangjinqi area probably acted as conduits for the migration of ***, the anticlinal structures and associated traps to the north of the HFZ might have trapped hydrocarbons that were charged from the Late Carboniferous–Early Permian coal measures in the COB since the Middle Jurassic.

关键词： structural geology hydrocarbons Upper Paleozoic Hangjinqi northern ordos basin North China

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Modes of Occurrence and Cleaning Potential of Trace Elements in Coals from the northern ordos basin and Shanxi Province, China

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Acta Geologica Sinica(English Edition) 2004年第4期78卷 960-969页

作者： WANGWenfeng QINYong JIANGBo FUXuehai CollegeofMineralResources ChinaUniversityofMiningandTechnologyXuzhouJiangsu221008

Based on the analyses of 43 elements in 16 samples of the raw coal and feed coal collected from the northern ordos basin and Shanxi Province, the modes of occurrence of these elements were studied using the method of cluster analysis and factor analysis, and the cleaning potential of the hazardous elements relatively enriched in the coals was discussed by analyzing six samples of the cleaned coal from the coal-washing plants and coal cleaning simulation experiments. The results shows that the elements Br and Ba show a strong affinity to the organic matter, Cs, Cd, Pb, Zn and Hg partly to the organic matter, and the other trace elements are mainly associated with the mineral matter. Cs, Mo, P, Pb, Zn and S have positive correlations with the two principal factors, reflecting the complexity of their modes of occurrence. Some elements that were thought to show a faint relationship (Be with S and Sb with carbonates) in other rocks are found to have a strong interrelation in the coals. Clay minerals (mainly kaolinite) dominate in the coals, and Ta, Th, Ti, Sc, REE, Hf, U, Se, W, V, Nb, Mo, Al, P, Cr, Pb and Zn are distributed mostly in kaolinite, while K, Rb, Cs, and Na have much to do with illite. Conventional cleaning can reduce the concentrations of most hazardous elements in various degrees. The hazardous elements S, As, Sb, Se, Mo, Pb, Cd and Hg relatively enriched in some coals from the area studied have a relatively high potential of environmental risks. However, by physical coal cleaning processes, more than 60% of As and Hg were removed, showing a high degree of removal, more than 30% of Sb, as well as S, Pb and Cd partly associated with the inorganic matter were removed. Se and Mo showing a relatively low degree of removal could be further removed by deep crushing of the coal during physical cleaning processes, and the concentrations of S, Pb, Cd and Hg with a partial association with the organic matter could be decreased in such ways as the coal blending. Clus

关键词： trace element mode of occurrence factor analysis cluster analysis cleaning potential northern ordos basin Shanxi Province

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