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论述了油藏地球物理学的一些基本概念,并介绍一种新的高分辨率地震反演技术——自适应波阻抗外推.在油藏地球物理学中,人们主要利用的地震信息是反射波形,但波形的直接解释是很困难的,原因是波形间的相互干涉,干涉的影响距离相当于子波的延续度,这比常规的时间分辨率1/2周期要大得多.波形干涉问题是地震资料的带限性质所造成的,这个问题只能通过地震和测井资料相结合才能解决.结合测井的地震反演是油藏地球物理学各种技术所共同采用的基本方法.自适应波阻抗外推是一种结合测井的地震反演新方法,此方法根据测井曲线和井旁地震记录的自适应映射关系.推导出一系列自适应算子.利用这些算子可以从地震记录估算出高分辨率波阻抗剖面.
Some basic concepts of reservoir geophysics are discussed, and a new high-resolution seismic inversion technique called extrapolation of adaptive wave impedance is introduced. In reservoir geophysics, people mainly use seismic information as reflection However, the direct explanation of the waveform is very difficult because of the mutual interference between the waveforms, and the influence distance of the interference is equivalent to the continuation of the wavelet, which is much larger than the conventional 1/2 period of the time resolution. The problem is caused by the band-limited nature of seismic data, a problem that can only be solved by a combination of seismic and logging data. Seismic inversion combined with logging is a common approach adopted by various reservoir geophysical techniques. Adaptive wave impedance extrapolation is a new seismic inversion method combining logging, which derives a series of adaptive operators based on the adaptive mapping between well logs and seismic records near the well. Using these operators, High-resolution wave impedance profiles are estimated from seismograms.