| 摘要: |
| 通过构造单元解剖与物理模拟,对苏北盆地高邮凹陷隐蔽性断层的成因及圈闭样式进行分析。结果表明:NNE向基底断层在古近纪复活时与区域拉伸方向呈小角度相交,存在基底断层连续断开型、雁列状正断层型、连接断层型和断续分布斜拉断层型等4种复活方式,进而在北斜坡、吴堡断裂带和真武断裂带形成具有不同展布特点的隐蔽性断层与断控圈闭样式;针对隐蔽性断层的特点,通过采用加入地层倾角、方向调节和滤波分析的相干体技术,可以有效识别隐蔽性断层的存在,并利用随机测线扫描落实断层的产状;应用该套技术可以有效地识别高邮凹陷的隐蔽性断层,发现大量的隐蔽断块油藏,取得了良好的勘探效果。 |
| 关键词: 隐蔽性断层 圈闭样式 相干体 高邮凹陷 |
| DOI：10.3969/j.issn.1673-5005.2014.04.004 |
| 分类号::TE 121.3 |
| 基金项目:中石化科技攻关项目(P09017,P13113) |
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| Trap styles and identification technology of concealed faults in Gaoyou sag |
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LI Yahui
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(Department of Petroleum Exploration, Jiangsu Oilfield Company, SINOPEC, Yangzhou 225009, China)
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| Abstract: |
| The formation mechanism and structural styles of concealed faults in Gaoyou sag of Subei Basin were discussed by using construction unit anatomy and physical simulations. The results show that there was a small angle between the NEE-trending basement faults and the regional stretching direction in the Paleogene period when the basement faults resurrected, of which there were four resurrection types, such as basement faults continuous disconnect type, en echelon normal fault type, connection fault type and discontinuous distribution stayed faulting type. The faults further evolved to concealed faults with different distribution characteristics and trap styles in the northern slope zone, Wubao fault zone and Zhenwu faulty zone of Gaoyou sag. Focusing on the characteristics of the concealed faults, the coherence technique which combines dip angle controlling, direction adjustment and filter method can effectively identify these concealed faults. The random survey line scanning technique is then used to implement fault occurrences. The application has been proven efficient in identifying many concealed fault block reservoir in Gaoyou sag. |
| Key words: concealed faults trap styles seismic coherence Gaoyou sag |
