| 柴达木盆地西部埋藏史分析与油气关系类型 |
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| 关键词:backstripped technique erosion burial history neotectonic movement western Qaidam |
| 基金项目:国家自然科学基金项目“西昆仑造山带新生代隆升过程与塔西南坳陷形成”（编号：40172073） |
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| 摘要: |
| An Analysis of the Burial History of Western Qaidam Basin in Relation to Oil-Gas Accumulation |
| Burial history analysis, by which the depositional process can be reproduced dynamically on computer according to the restored fossil strata thickness, is the core of petroleum system research and also serves as the basis and key in the study of hydrocarbon generation, migration and accumulation. On the basis of a regional geological background analysis, the total thickness of the eroded strata was calculated quantitatively by EASY%Ro method. The thickness of the eroded strata was proved reasonable and reliable by examples, and the original thickness of formations was restored by the backstripped technique. Maps for the burial history of single wells were drawn and the burial history was divided into three types, namely non-erosion (continuous sedimentation), middle erosion and late erosion. There exists close relationship between burial history and oil-gas accumulation. The primary oil-gas reservoirs might be preserved in areas not affected by strong uplift and erosion. Nevertheless, late strong erosion could destroy primary oil-gas reservoirs and lead to the formation of secondary oil-gas reservoirs in shallow layers. The results of the study can play an important role in recognizing sedimentary evolution history and guiding oil-gas exploration work in western Qaidam. |
| GUO Ze-qing,LIU Wei-hong,LIU Ben-jing,ZHONG Jian-hua,ZHAO Mi-fu,WANG Hai-qiao.2005.An Analysis of the Burial History of Western Qaidam Basin in Relation to Oil-Gas Accumulation[J].Acta Geoscientica Sinica,26(5):465-471. |
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