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时间推移地震的主要目的是对油藏变化进行监测,为油藏管理提供直接的依据。在油藏中进行的开发措施会引起油藏物性的变化,所采集到的地震数据也会因此而产生差异。利用地震数据的这种差异可以对流体流动、压力变化、温度变化及由开发措施引起的其他效应成像。在时间推移地震差异剖面上,与油藏物性无关的数据要具有复测不变性;与油藏物性有关的差异数据要具有稳定性和可靠性。互均化技术是时间推移地震数据处理的核心,它能有效消除由数据采集误差和处理误差引起的与油藏物性变化无关的假异常。
The main purpose of time-lapse earthquakes is to monitor reservoir changes and provide a direct basis for reservoir management. Developmental measures in reservoirs can cause changes in reservoir properties and the resulting seismic data can also vary. Using this difference in seismic data, fluid flows, pressure changes, temperature changes, and other effects caused by developmental measures can be imaged. On the time-lapse seismicity profile, the data unrelated to the reservoir properties should have retest invariance; the difference data related to reservoir properties should be stable and reliable. Homogenization technology is the core of time-lapse seismic data processing. It can effectively eliminate the false anomalies that are irrelevant to the changes of reservoir physical properties caused by data collection errors and processing errors.