| 东海西湖凹陷第三系反转构造及其对油气聚集的影响 |
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| 关键词:inversion structure hydrocarbon accumulation Xihu trough |
| 基金项目:国家攀登计划预选项目(95-预-39) |
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| 摘要: |
| Characteristics of Tertiary Inversion Structures and Their Influence on Oil-Gas Accumulation in Xihu Trough, East China Sea |
| Inversion structure is a compressive extensional composite structure resulting from thrusting along the early extension fault due to the late compression. The Tertiary Xihu trough in East China Sea underwent earlier rifting and later compression stages, which led to the formation of widespread and large scale inversion structures. In terms of deformation intensty, these features can be assigned to two categories, namely, the simple fault extended inversion folds and the fault penetrated inversion folds. The inversion structures in the basin can be classified into several types based on their differences in geometry: the simple back thrusting inversion, complex Y shaped inversion, H-shaped inversion and flower like inversion. There are three inversion structure belts recognizedin the Xihu trough: (1)the western slope fault belt, (2)the central basin deformed belt and (3)the eastern margin fault belt. The central inversion structure belt was intensively deformed and is the largest in size. The eastern margin inversion belt is the second in size, and the western slope fault belt is the weakest in inversion. This paper deals mainly with characteristics of inversion structures and their organization and distribuation. The influence of the basin inversion on the accumulation of oil and gas in the basin is also discussed in the paper. |
| LIU Jing-yan,LIN Chang-song,JIANG Liang,CHEN Zhi-yong.2000.Characteristics of Tertiary Inversion Structures and Their Influence on Oil-Gas Accumulation in Xihu Trough, East China Sea[J].Acta Geoscientica Sinica,21(4):350-355. |
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