| 川西坳陷中段喜山期剥蚀厚度恢复 |
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| 引用本文： | 沈忠民,刘阳,刘四兵.川西坳陷中段喜山期剥蚀厚度恢复[J].物探化探计算技术,2011,33(2):189-194,108. |
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| 作者姓名： | 沈忠民 刘阳 刘四兵 |
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| 作者单位： | 1. 油气藏地质及开发工程国家重点实验室,成都理工大学,四川,成都,610059
2. 中石化西南分公司,勘探开发研究院,四川,成都,610081 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 自晚三叠世以来,川西坳陷先后经历了安县运动、印支晚幕运动和喜山运动,造成工区内地层的多次抬升剥蚀,形成了多个不整合面。本次研究是通过镜质体反射率和声波时差法,恢复川西坳陷中段喜山期的剥蚀厚度。通过镜质体反射率恢复的剥蚀厚度为844 m～3 192.6 m,平均为1 642.5 m;通过声波时差法恢复的剥蚀厚度为1 015.5 m～1 676.1 m,平均为1 386.4 m。这一差值是由于工区内普遍存在的超压,对声波时差法恢复剥蚀厚度的影响造成的。剥蚀厚度恢复结果表明：川西坳陷具有从北往南剥蚀厚度减小的特征;从西往东,则表现为先变小后变大的特征。在鸭子河地区剥蚀较强、往东到马井地区剥蚀厚度变小,再往东到中江,剥蚀厚度又变大。
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| 关 键 词： | 川西坳陷 喜山期 剥蚀厚度 镜质体反射率 声波时差 |
Denudation recovery of himalayan periods in middle section of western Sichuan depression |
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| SHEN Zhong-min,LIU Yang,LIU Si-bing.Denudation recovery of himalayan periods in middle section of western Sichuan depression[J].Computing Techniques For Geophysical and Geochemical Exploration,2011,33(2):189-194,108. |
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| Authors: | SHEN Zhong-min LIU Yang LIU Si-bing |
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| Institution: | SHEN Zhong-min1,LIU Yang1,LIU Si-bing2 ( 1.State Key Lab of Oil - gas Reservoirs Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China,2. Exploration and Production Research Institute of Southwest Branch Company,Chengdu Sichuan 610081,China). |
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| Abstract: | Uplift and erosion of stratigraphy in a basin is a common phenomenon. Denudation Recovery of stratigraphy is the key and basis during the study of basin evolution and resource assessment. Tectonic movements have occurred frequently in the middle section of west Sichuan depression since the late Triassic, including the Indosinian movement, the Anxian movement, the Yanshan movement and the Himalaya movement. They are mainly caused by compressive stresses leading to many unconformity surfaces. Vitrinite reflec... |
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| Keywords: | west Sichuan depression himalayan erosion thickness vitrinite reflectance sonic time difference |
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