| 川东南丁山构造震旦系—下古生界油气成藏条件及成藏过程 |
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| 引用本文： | 孙玮,刘树根,王国芝,徐国盛,雍自权,黄文明.川东南丁山构造震旦系—下古生界油气成藏条件及成藏过程[J].地质科技情报,2010,29(1). |
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| 作者姓名： | 孙玮 刘树根 王国芝 徐国盛 雍自权 黄文明 |
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| 作者单位： | 1. 成都理工大学,地球科学学院,成都,610059
2. 成都理工大学,油气藏地质及开发工程国家重点实验室,成都,610059 |
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| 基金项目： | 国家重点基础研究发展计划“973”项目(2005CB422106);;矿物学岩石学矿床学国家重点(培育)学科建设项目(SZD0407) |
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| 摘 要： | 川东南的构造演化可分成5个阶段:①晚震旦世抬升剥蚀阶段;②早古生代沉降阶段;③晚志留世—泥盆、石炭纪抬升剥蚀阶段;④二叠纪—晚白垩世沉降阶段;⑤晚白垩世—现今快速隆升阶段。震旦系灯影组—下古生界储层沥青与下寒武统和下志留统黑色泥岩之间地球化学特征的对比表明二者有着重要的联系,灯影组烃源来自下寒武统牛蹄塘组。丁山构造一直处于高部位,有利于油气聚集,丁山构造在晚白垩世前圈闭、封盖、储层及保存条件均较好,形成了古油藏。随着埋深的增大,古油藏裂解成古气藏。晚白垩世至今受喜马拉雅运动的影响,通天断层发育,保存条件变差,导致天然气的逸散。丁山构造的油气成藏过程可分为古油藏→古油藏裂解形成古气藏→古气藏破坏三大过程。
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| 关 键 词： | 川东南 丁山构造 天然气成藏 |
Petroleum Formed Condition and Process Research for Sinian to Low Paleozoic at Dingshan Structure in Southeast of Sichuan Basin |
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| SUN Wei,LIU Shu-gen,WANG Guo-zhi,XU Guo-shen,YONG Zi-quan,HUANG Wen-ming.Petroleum Formed Condition and Process Research for Sinian to Low Paleozoic at Dingshan Structure in Southeast of Sichuan Basin[J].Geological Science and Technology Information,2010,29(1). |
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| Authors: | SUN Wei LIU Shu-gen WANG Guo-zhi XU Guo-shen YONG Zi-quan HUANG Wen-ming |
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| Institution: | a.Faculty of Earth Sciences;b.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation;Chengdu University of Technology;Chengdu 610059;China |
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| Abstract: | Tectonic evolution of southeast Sichuan Basin can be divided into five stages :① the uplift and erosion in Late Sinian; ② the subsidence in Early Paleozoic; ③the uplift and erosion stage in Late Silurian to Carboniferous;④ the subsidence in Permian to Late Cretaceous; and ⑤ the rapid uplift from Late Cretaceous to now. The geochemical comparison between the Asphalt in Dengying Formation-Late Paleozoic of reservoir and the black shale in Lower Cambrian and the Silurian indicates that they have important links. The source rocks in Dengying Formation originate from Niutitang Formation in Lower Cambrian. With a high position, Dingshan structure has the advantage of oil and gas accumulation. It had good trap,capping, reservoir, storage conditions before Late Cretaceous. It formed plaeo-oil reservoir. With the increase in buried depth, the oil thermal cracked to gas. The holding condition is destroyed by Himalayan movement from Late Cretaceous to now. The fault leading to the surface causes the effusion of the gas . The petroleum formed process is paleo-oil reservoir→paleo-gas reservoir→paleo-gas reservoir destroyed. |
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| Keywords: | southeast of Sichuan Basin Dingshan structure gas formed |
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