油气幕式成藏的矿物学和地球化学记录——以准噶尔盆地西北缘油藏为例

doi:10.11743/ogg20060402

Abstract

Abstract:

Authigenic minerals,such as calcite and etc.with oil-bearing girdles that recorded the traces of episodic reservoiring event and their geochemical characteristics,are studied in this paper.The calcite(also called SiO₂ the fissure filler),consisting of various components and interweaving with a dozen or more oil-bearing girdles inside them,is likely to be found near the source faults of some reservoirs in the northwest margin of Junggar basin.Geochemical tracing analysis suggests that the hydrocarbon-bearing fluids were mainly sourced from the deep of the Permian and had carried with them such elements as Fe,Mn,and etc..Therefore,the oil-bearing calcite in close relation to hydrocarbon charging is rich in Fe and Mn and the contents of Fe,Mn,and Mg in the calcite girdle fluctuate remarkably.This phenomenon honestly recorded the periodic process of the episodic charging of hydrocarbon-bearing fluids.

Key words: episodic reservoiring, calcite girdle, geochemical record, Junggar basin

CLC Number:

TE112.113

Hu Wenxuan, Jin Zhijun, Zhang Yijie, Yao Suping, Zhang Yunqian, Cao Jian. Mineralogy and geochemical records of episodic reservoiring of hydrocarbon: example from the reservoirs in the northwest margin of Junggar basin[J]. Oil & Gas Geology, 2006, 27(4): 442-450.

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Mineralogy and geochemical records of episodic reservoiring of hydrocarbon: example from the reservoirs in the northwest margin of Junggar basin

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