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The Development of Original Basin in Late Hercynian Period and Its Control for Oil-gas Forming in Bogda Region, Xinjiang

Author: YuHaiYang
Tutor: ZhangChuanHeng
School: Chinese Geology University (Beijing)
Course: Paleontology and stratigraphy
Keywords: Bogda Late Paleozoic Tectonic attributes Palaeogeographic Exploration zone
CLC: P618.13
Type: Master's thesis
Year: 2005
Downloads: 185
Quote: 3
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Abstract


Bogda area is located in the eastern section of the southern margin of the Junggar Basin, there are rich oil and gas resources for the region, is currently China's oil and gas exploration in key areas. Developed in this area of ??Upper Paleozoic era strata, the the major developmental Permian Lucaogou group of Hongyanchi and the two sets of reservoir-cap combination Jurassic and Yanshan stage and Himalayan stage two and expulsion. Bogda analysis, its characteristics and the nature of the continental rift volcanic rocks is consistent with the geochemistry of the volcanic rocks from the mineralogical composition, major elements, trace elements and rare earth elements; spit from Ehud group volcaniclastic rocks of Boonen and Bo North South paleocurrent direction consistent inference, in the Carboniferous Bogda areas do not have different visual characteristics of the flow of both sides of the island arc. Therefore Bogda orogenic belt of late Paleozoic tectonic attributes continental rift environment. The late Hercynian basin development of two phases: early volcanic and related sedimentary development period; late terrigenous clastic filling period. The terrigenous clastic filling period of the beginning of the performance is far from the source of sediment massive injection Bogda area since the turn of the Carboniferous and Permian occasion. The Early Permian Sedimentary Paleogeography the basic pattern of inheritance of the Late Carboniferous look subsidence center was moved northward. Bogda Shannan and north sides of the Early Permian early deposition from the unified provenance, with the same sediment diffusion direction; late differentiation, manifested as in Bogda Mountain region of the southern slope of firewood barracks sediments diffusion orientation in the north east. Late Permian Basin structure basically inherited the Early Permian Basin structure, the main source area is located in the north of the basin, however, the the Late Permian the final Wulabo - Jiji trough sediments from the Basin south of the Tianshan region. Based on the extent of hydrocarbon source rocks, organic matter abundance, type and maturity characteristics of the Dabancheng time the concave Lucaogou, Hongyanchi group main source rocks plane distribution of a comprehensive evaluation was divided into Ⅰ, Ⅱ, Ⅲ, Ⅳ class source rocks. Formed. Chaiwopu region after the Yanshan movement, and later by the transformation of the Himalayan movement forming, mainly formed the Bogda off Long Bonan thrust mask covered with West pimple fault block structure, Aksu anticline the Xigou on Temple constructed Poplar Hexi - Xialei Ravine - Xigou structure and the the Dabancheng structure. Hydrocarbon source rock evolution and structure matching relations combined on the Permian Lucaogou and comprehensive evaluation of hydrocarbon source rock of the Hongyanchi group the structural traps Chaiwopu analysis, the most favorable, favorable and adverse three levels of exploration zone, and pointed out the direction for further oil and gas exploration.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas
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