Fault orientation variations along the strike of active normal fault systems in Italy and Greece: Implications for predicting the orientations of subseismic-resolution faults in hydrocarbon reservoirs
Fault orientation variations along the strike of active normal fault systems in Italy and Greece: Implications for predicting the orientations of subseismic-resolution faults in hydrocarbon reservoirs
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DOI：
10.1306/08300605146
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发表时间：
2007
期刊：
影响因子：
3.5
通讯作者：
G. Roberts
中科院分区：
文献类型：
--
作者：
G. Roberts
亚地震级断层的方向沿着意大利和希腊盆地边界的活动正断层的走向系统地变化。总共 16,272 个断层面走向和倾角的露头测量及其相关的滑移矢量表明正断层的侧断层尖端附近存在斜滑移；地震断层的方向发生变化以适应这种滑动。如果从下盘向上盘看地图，断层左端发生右旋滑移，断层右端发生左旋滑移。总体而言，滑移矢量朝上盘汇聚，容纳该滑移的断层的交线平行于滑移矢量。如果相同的断层类型适用于其他地方，则本文提出的经验关系可用于校准机械断层模型的结果，并为地下碳氢化合物储层中岩石的正断层边界隔室的方向提供实用指南，因为跨越此类断层的偏移可能低于地震分辨率并且不适合直接测量。
The orientations of subseismic-scale faults vary systematically along the strike of basin-bounding, active normal faults in Italy and Greece. A total of 16,272 outcrop measurements of the strike and dip of fault planes and their associated slip vectors indicate oblique slip near the lateral fault tips of the normal faults; subseismic faults vary in orientation to accommodate this slip. If viewed in map view from the footwall looking toward the hanging wall, right-lateral slip occurs at the left end of the faults, with left-lateral slip at the right end. Overall, slip vectors converge toward the hanging wall, with intersection lines for faults accommodating this slip parallel to the slip vector. If the same faulting style applies elsewhere, the empirical relationships presented herein can be used to calibrate results from mechanical fault models and provide a pragmatic guide to the orientations of normal-fault-bound compartments of rock in subsurface hydrocarbon reservoirs, given that the offsets across such faults may be below seismic resolution and not amenable to direct measurement.