水驱四维地震技术--叠前互均化处理

互均化处理是四维地震的关键技术，目的是尽可能地减少或消除由非油藏因素引起的地震资料的不一致性，使由油藏动态变化所造成的地震变化得以最佳成像。互均化处理一般分为叠前互均化处理和叠后互均化处理。叠后互均化处理比叠前互均化处理容易实现，但是不能完全消除非油气藏因素产生的影响，而叠前互均化处理可以最大程度地消除由于采集、处理等因素造成的不一致性。以高29断块四维地震叠前互均化试处理为例，探讨了叠前互均化处理方法，建立了叠前互均化处理流程，效果明显。

4-D seismic in water flooding reservoirs:Pre-stack cross equaligation

Cross equalization is the key step of time lapse seismic processing. The goal of cross equalization is to attenuate the non repeatability caused by non reservoir changes, and to image the seismic reflections that are related to the reservoir changes accurately. Cross equalization can be performed before or after stacking. Though it is ready to carry out, post stack cross equalization fail to effectively eliminate non consistency caused by acquisition and processing. In this paper we illustrated pre stack cross equalization on the time lapse seismic data of fault block Gao29 and proposed a workflow of pre stack cross equalization.