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公开(公告)号:US20030110018A1
公开(公告)日:2003-06-12
申请号:US10016437
申请日:2001-12-10
Applicant: WesternGeco L.L.C.
Inventor: Nader Dutta , Subhashis Mallick
IPC: G06G007/48
Abstract: The present invention presents a method for determining shallow water flow risk using seismic data. The seismic data can be processed to enhance its stratigraphic resolution by sub-sampling the seismic data to less than a two-millisecond interval. Performing a stratigraphic analysis on the seismic data and evaluating the seismic attributes of the seismic data can be used to select a control location. A pre-stack waveform inversion is applied to seismic data at a selected control location to provide an elastic model, which includes pressure-wave velocity and shear-wave velocity. The shallow water flow risk is then determined using the elastic model by comparing the pressure-wave velocity to the shear-wave velocity. A post-stack inversion can be applied on the seismic data using the elastic model to model a 3D volume to determine the shallow water flow risk across the 3D volume.
Abstract translation: 本发明提出了使用地震数据确定浅水流量风险的方法。 通过对地震数据进行二次采样,可以对地震数据进行处理,以提高其地层分辨率,使其小于2毫秒。 对地震数据进行地层分析,并对地震数据的地震属性进行评估,可用于选择控制位置。 将叠前波形反演应用于所选择的控制位置的地震数据,以提供包括压波速度和剪切波速度的弹性模型。 然后通过将压力波速度与剪切波速度进行比较,使用弹性模型确定浅水流量风险。 可以使用弹性模型对地震数据应用叠前反转,以建模3D体积,以确定跨越3D体积的浅水流量风险。