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| 车排子地区石炭系挤压逆冲构造区断层共生裂缝发育程度定量表征 |
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杨少春1,2,牛海瑞1,3,宋明水4,赵永福1,4,汪勇1,4
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(1.中国石油大学地球科学与技术学院,山东青岛 266580;2.海洋国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛266071;3.中石化新星山东新能源有限公司,山东东营 257000;4.中国石化胜利油田分公司油气勘探管理中心,山东东营 257017)
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| 摘要: |
| 在准噶尔盆地车排子地区多期挤压逆冲构造背景下,石炭系火山岩断裂伴生大规模构造裂缝。综合利用岩心、薄片、成像测井和地震等资料,对车排子地区石炭系断层共生裂缝的发育程度进行定量化表征及预测。研究结果表明:与逆断层伴生的高角度剪切缝和扩张裂缝是石炭系发育的主要裂缝类型,构造裂缝的走向、倾角、密度及张开度等参数与断层密切相关;研究区断裂级别可划分为Ⅰ～Ⅲ级,通过建立断层共生裂缝密度分布函数,得出3类断层对裂缝发育的控制范围分别为5.5、3.0、0.9 km。在充分考虑不同级别断层对裂缝发育控制作用的基础上,采用统计和回归分析的方法定量分析石炭系断裂强度,通过全区断裂信息维到裂缝信息维的转换,最终实现对车排子地区石炭系断层共生裂缝发育程度的精细刻画和定量表征。 |
| 关键词: 挤压逆冲构造 断裂级别 裂缝密度 定量表征 车排子地区 |
| DOI：10.3969/j.issn.1673-5005.2017.05.001 |
| 分类号::TE 122.2 |
| 文献标识码:A |
| 基金项目:国家科技重大专项(2017ZX05009001) |
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| Quantitative characterization of development degree of fault-related fracture in compressional thrust structure block of the Carboniferous in Chepaizi area |
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YANG Shaochun1,2, NIU Hairui1,3, SONG Mingshui4, ZHAO Yongfu1,4, WANG Yong1,4
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(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China;2.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;3.SINOPEC Star Shandong New Energy Coompany Limited, Dongying 257000, China;4.Management Center of Oil and Gas Exploration, SINOPEC Shengli Oilfield, Dongying 257017, China)
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| Abstract: |
| Under the multi-phase compressional thrust structure setting in Chepaizi area, Junggar Basin, a large amount of fractures associated with local fault systems were formed within the Carboniferous volcanic rock. Using a comprehensive analysis of core, thin sections, image logs and seismic profiles data, a quantitative characterization and prediction of fault-related fracture development in Carboniferous of Chepaizi area was performed. The results show that the high angle shearing fractures and tensional fractures are the main types in Carboniferous.The fracture parameters, such as direction, dip angle, density, and opening width are closely correlated with the fault. Based on the derived fault-control fracture density function, the fault grades of the study area can be divided intoⅠ, II, andⅢ,with the effective control distancesas 5.5,3.0 and 0.9 km,respectively. A quantitative analysis of fault strength was also conducted, mainly using statistical and analytic methods to transform the regional fault information into the fracture information, resulting in a detailed description and a quantitative characterization of fault-related fracture development in the Carboniferous of Chepaizi area. |
| Key words: compressional thrust structure fault grade fracture density quantitative characterization Chepaizi area |
