高角度走滑断缝体断裂识别及解释——以鄂尔多斯盆地镇泾区块为例
Identification and interpretation of fractures in high-angle slide fracture body:A case study from Zhenjing Block in the Ordos Basin
王宝江 1吴振锋 2吉娃阿英 1杨桂林 3孙洪 1钟昆 1于强 4任战利5
作者信息
- 1. 凉山农业数字化转型四川省高等学校重点实验室,四川 西昌 615013;西昌学院信息技术学院,四川 西昌 615013
- 2. 陕西延长石油(集团)有限责任公司天然气研究院,陕西 西安 710061
- 3. 榆林学院化工学院,陕西 榆林 719000
- 4. 长安大学地球科学与资源学院,陕西 西安 710054
- 5. 西北大学地质学系,陕西 西安 710069
- 折叠
摘要
断缝体通常发育在沉积盆地中的走滑断裂系统中,断裂具有很强的隐蔽性,传统的断裂识别技术表现不佳.现有的针对目的层的断裂解释策略通常采用局部视角,忽视了断缝体断裂的整体特征.通过使用U-ResNet深度学习模型,对鄂尔多斯盆地镇泾区块所有地层进行了断裂识别.结合倾角导向地震属性切片,揭示了断裂的形成机制、期次和级别,同时也首次估算了NWW向走滑距离.通过分析深部断裂的延伸特征,证实了该区块南部3组NWW向走滑断裂本质上是花状构造,根茎延伸至基底断裂,也证实了基底断裂在多次构造运动中的重新启动.划分了长8段断缝体的剖面和平面样式,并在NEE向断裂上识别出1个菱形—拉分地堑,提供了NEE向断裂走滑运动的地震证据.此外,还发现了3处纺锤—凹陷断裂组合,解释了雁列式—阶梯断裂的形成原因,并给出了有利的断缝体组合样式及其在平面上的分布位置.研究表明,采用深度学习断裂技术和全视角解释策略,有助于揭示复杂高角度走滑断缝体的断裂发育特征及其演化规律.
Abstract
Fracture bodies usually develop in the slip fault systems in sedimentary basins,and the fractures have strong concealment,and traditional fracture identification techniques do not perform well.Existing fracture inter-pretation strategies for target layers usually adopt a local view,ignoring the overall characteristics of fracture body fractures.Through the use of the U-ResNet deep learning model,all strata of the Zhenjing Block in Ordos Basin were identified for fractures.Combined with dip-guided seismic attribute slices,the formation mecha-nism,periods and levels of fractures were revealed,and for the first time,the NWW slip distance was estimat-ed.By analyzing the extension characteristics of deep fractures,it was confirmed that the three groups of NWW-oriented slide fractures in the southern part of the block are essentially flower structures,and their rootstock ex-tended to the basal fractures,confirming the reactivation of basal fractures in multiple tectonic movements.The cross-section and plan style of Chang 8 fracture body were divided,and a diamond-pulling rift was identified on the NEE fracture,providing seismic evidence for the NEE fracture slip movement.In addition,three spindle-de-pression fracture combinations were found,explaining the formation reasons of staggered-step faults,and giving the favorable combination style of fracture bodies and their distribution positions on the plane.The study shows that the application of deep learning fracture technology and a full-view interpretation strategy helps to reveal the development characteristics and evolution rules of complex high-angle slip fracture bodies.
关键词
断缝体/走滑断裂/深度学习/U-ResNet/断裂组合Key words
Fracture bodies/Strike-slip faults/Deep learning/U-ResNet/Fracture styles引用本文复制引用
出版年
2025
NETL
NSTL
万方数据