塔木察格盆地南贝尔凹陷西部次凹下白垩统沉积和石油地质特征.pdfVIP

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塔木察格盆地南贝尔凹陷西部次凹下白垩统沉积和石油地质特征.pdf

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塔木察格盆地南贝尔凹陷西部次凹下白垩统沉积和石油地质特征

Advances in Geosciences 地球科学前沿, 2016, 6(5), 371-386 Published Online October 2016 in Hans. /journal/ag /10.12677/ag.2016.65039 Sedimentary and Petroleum Geological Characters of Lower Cretaceous in West Sub-Sag, South Buir Sag of Tamtsag Basin 1 2 2 2 Genyao Wu , Xiaodong Sun , Defeng Zhu , Qiang Li 1 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 2 Exploration and Development Research Institute of Daqing Oilfield Ltd., Daqing Heilongjiang th th th Received: Oct. 5 , 2016; accepted: Oct. 24 , 2016; published: Oct. 27 , 2016 Copyright © 2016 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Open Access Abstract The evolution of the West Sub-Sag, South Buir Sag of Tamtsag Basin in Mongolia is mainly con- trolled by extension of the contemporaneous NE-orientated faults. In addition, it is superimposed with the influences of the base-mental relief and the transferring of NEE- /near WE-orientated shear fracture. The early Early Cretaceous was a fault-depressing stage of the West Sub-Sag’s tec- tono-sedimentary evolution, and the facies developing experienced a complete cycle of universal- differentiation-re-universal. In the Tongbomiao and Nantun Formations, the major sedimentary facies-types are fan delta, inshore underwater fan and lacustrine facies. The distribution of fan bodies and each sub-facies occurring of fan delta and inshore underwater fan shoul