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重复3-D和井间地震测量适用于在风积砂岩储层内预测和监测蒸汽的传播。地震热响应连同岩心和电缆测井(地层显微扫描仪)的地震数据一起表明:储层中存在各向异性的流动结构。影响蒸汽传播的三种地质因素是裂缝、存在于岩石骨架中的方向渗透率和断层。基线和监测测量的3-D地震等时线图显示出,注入井附近的速度下降7%～10%。在时间推移测量数据的时间切片上所显示的反射特征意味着在研究区内存在着不对称的蒸汽流动。表示基线和监视测量之间速度变化的差分速度层析成像意味着控制流体流动的主要因素是裂缝和方向渗透率。流动机理的实质由注入井周围的四口生产井间的示踪剂检验和流体温度测量来支持。在重复3-D地震数据时间切片上描绘的反射特征和差分井间层析成像上显示的速度变化都表明优先的流动方向是 N-S和 NE-SW向。
Repeated 3-D and cross-well seismic measurements are suitable for predicting and monitoring the propagation of steam within aeolian sandstone reservoirs. Seismic thermal responses, along with seismic data from cores and wireline logs (stratal microdissectors), indicate that there is an anisotropic flow structure in the reservoir. The three geological factors that affect steam propagation are cracks, directional permeability and faults that exist in the rock skeleton. The 3-D seismogram of baseline and monitoring measurements shows that the velocity near the injection well has been reduced by 7% -10%. Reflected signatures displayed on the time slice of the time-lapse measurement data mean that there is asymmetric vapor flow within the study area. Differential velocity tomography, which represents the change in velocity between baseline and monitoring measurements, means that the major factors controlling fluid flow are fracture and directional permeability. The nature of the flow mechanism is supported by tracer tests and fluid temperature measurements between the four production wells surrounding the injection well. The reflection features depicted on the time slice of the repeated 3-D seismic data and the velocity variations shown on the differential cross-well tomography both indicate that the preferred flow direction is the N-S and NE-SW directions.