Seismic imaging of complex structures in the tarim basin
Seismic imaging of complex structures in the tarim basin
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DOI：
10.1007/s12583-015-0560-9
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发表时间：
2015-07
影响因子：
3.3
通讯作者：
N. Guo;Chao Wu;S. Fagin
中科院分区：
文献类型：
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作者：
N. Guo;Chao Wu;S. Fagin
传统的时间成像技术无法对塔里木盆地山前区进行精确的地下地震成像。他们的成像结构之前导致了一些重大的钻井失败，背负着“他们的结构闭孔有轮子，结构高点有弹簧”的恶名。本文首先列出了成像方面的挑战，并用示意图解释了时间成像技术在这一领域失败的原因。然后通过一系列的实际数据实例表明，当存在横向速度变化时，深度成像是解决该地区成像挑战的唯一解决方案。深度成像考虑了波场的复杂性，因此产生了优越的、地质上合理的图像。正确进行深度成像的核心任务是建立速度模型。本文着重介绍了这方面的几个主要方面。
Conventional time imaging techniques are not capable of producing accurate seismic imaging of the subsurface in the mountain front of the Tarim Basin, China. Their imaged structures have led to some major drilling failures before, bearing a disrepute that “their structural closures have wheels and their structural highs have springs”. This article first lists the imaging challenges, and explains in a schematic why the time imaging techniques fail in this area. Then through a series of real data examples, it demonstrates that when there exist lateral velocity variations, depth imaging is the only solution to tackle the imaging challenges in this area. Depth imaging accounts for the complexity of the wavefield, therefore produces superior and geological plausible images. The core task in properly performing depth imaging is building the velocity model. This article stresses some the main aspects in this regard.