【摘要】 塔河油田奥陶系碳酸盐岩岩溶缝洞型油藏的主体开发区已进入挖潜阶段,前期对于强"串珠状"异常反射的大尺度缝洞储集体开发动用程度高,而呈"非典型"地震弱异常反射的小尺度缝洞储集体还处于开发初期,提高这类储集体的精细预测与识别精度,是进一步提高塔河油田储量动用率的关键所在。通过应用局部倾角滤波与预测反演联合的绕射波分离技术,从地震记录中将绕射波分离出来并单独成像,然后再与常规叠前时间偏移地震数据体进行融合处理,以突出小尺度缝洞储集体的"非典型"地震弱反射异常。实际应用效果表明,通过绕射波分离成像与融合处理的方法有效地提高了前期较难识别的"非典型"弱反射异常体的识别与刻画能力。更多还原

【Abstract】 The main reservoir type is the Ordovician carbonate Karst fracture-cave reservoir in Tahe Oilfield,which has entered potential tapping period.The producing degree of large-scale fracture-cave reservoir with strong "bead"anomalous reflection is high,while the small-scale reservoirs with"atypical"weak seismic reflection anomalies is at the initial stage of production,so enhancing the precision of fine reservoir characterization and identification is the key to increase the producing rate of reserves in Tahe Oilfield.Therefore,we utilized the diffraction wave separation technique(combining local dip filtering with prediction inversion)to separate diffraction wave from seismic data and image it separately;then,the result was carried out fusion processing with conventional PSTM seismic data volume to highlight the"atypical"weak seismic reflection anomalies.The actual application indicates that the diffraction wave separation imaging and fusion processing method effectively improve the capability for characterizing and identifying the "atypical"weak seismic reflection anomalies which is hard to be recognized previously.更多还原