| 摘要: |
| 鄂尔多斯盆地奥陶系马家沟组碳酸盐岩中裂缝非常发育,本文从成岩角度对它们进行了研究。依据裂缝间切割关系、裂缝与成岩组构问关系、裂缝内充填物类型和地球化学特征,将裂缝分为七期。并通过有机质成熟演化历史与裂缝形成历史的匹配分析,认为燕山运动形成的第Ⅵ期裂缝和喜山运动形成的第Ⅶ期裂缝可成为有效储渗裂缝,分别对盆地中部和第三纪断陷区天然气藏的形成有重要意义。 |
| 关键词: 裂缝 储集意义 碳酸盐岩 马家沟组 鄂尔多斯盆地 |
| DOI： |
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| 基金项目: |
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| DIAGENESIS OF THE CARBONATE ROCKS OF THE MAJIAGOU FORMATION IN THE ORDOS BASIN:FRACTURES AND THEIR IMPLICATIONS FOR OIL AND GAS STORAGE |
| Li Guorong |
| (Chengdu University of Technology) |
| Abstract: |
| Fractures are well developed in the carbonate rocks of the Ordovician Majiagou For-mation in the Ordos Basin.In this paper,the fractures investigated are interpreted as the products of diagenesis,and underwent seven stages of evolution,which have been distin-guished in terms of the crosscutting relationships between the fractures,relationships be-tween fractures and diagenetic fabrics,types and geochemical characteristics of the fillings within the fractures.Viewed from the history of the fracture formation,matching with that of organic matter maturation,the Ⅵ and Ⅶ stages of fractures created by Yanshanian and Himalayan Movements,respectively may become valid fractures for oil and gas storage,and play an important part in the migration and accumulation of oil and gas in the central part of the basin and the Tertiary faulted trough areas. |
| Key words: fracture implications for oil and gas storage carbonate rock Majiagou Formation Ordos Basin |
