我怎么提取地震振幅地平线上一种解释吗?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 07 - t18:05:37z //www.hoelymoley.com/feeds/question/5023 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/5023 8 我怎么提取地震振幅地平线上一种解释吗? 安迪 //www.hoelymoley.com/users/3056 2015 - 06 - 22 - t08:37:02z 2015 - 06 - 22 - t12:29:59z < p >看来,地平线上一种解释地震振幅提取有利于显示通道。例如:< a href = " http://seismicatlas.org/entity?id=98a83c60 - ea81 - 47 - cc - 9304 - 6041 - f6ec5277”> http://seismicatlas.org/entity?id=98a83c60 - ea81 - 47 - cc - 9304 - 6041 - f6ec5277 < / >。< / p > < p >似乎经常使用均方根振幅。< / p > < p > <强>什么时候一个使用振幅和什么时候用均方根振幅吗?< /强> < / p > < p >当使用均方根振幅必须集成在一个窗口在地平线上。< / p > < p > < >强哪个窗口做一用?< /强> < / p > < p >我经常看到均方根振幅的图像地图的标题简单说类似“与均方根振幅提取低三级地平线”。< / p > < p >这是否意味着均方根计算在一个窗口从z =地平线- 10 m层+ 10 m例如?< / p > < p >或均方根计算可能意味着在地平线上方的窗口从z = 3峰3峰值低于地平线?< / p > //www.hoelymoley.com/questions/5023/-/5025 # 5025 6 回答由马特·霍尔如何提取地震振幅地平线上一种解释? 马特·霍尔 //www.hoelymoley.com/users/28050 2015 - 06 - 22 - t12:29:59z 2015 - 06 - 22 - t12:29:59z < p > <强>你的大多数问题的答案是:视情况而定。< /强> < / p > < h3 >是振幅映射频道好吗?< / h3 > < p >振幅地图< em > < / em >可以伟大的发现和解释渠道系统。这取决于地质和地震资料的特点。有时你可以看到通道,这可能是定性有用,有时你可以推断出定量信息,如宽度、厚度、成分、孔隙度、流体的内容。视情况而定。< / p >

Here's a workflow for any kind of attribute analysis. I'll try to add to it in the next day or two.

When should I use RMS amplitude?

Before confusing yourself with what others do (they are not necessarily a good guide), it's worth reading about different kinds of average.

The main feature of the RMS average, for geophysicists anyway, is that it works on zero-mean data like seismic:

RMS amplitude for a seismic trace

So it's not really that "when using RMS amplitude one must integrate over a window", more that if you want to measure amplitude over a window, you must use RMS.

Because the values are squared, RMS has two other features (or bugs, depending on your point of view): large values are emphasized, and noise may therefore be emphasized.

An alternative is to use the envelope of the trace (sometimes also called 'energy' or 'absolute amplitude'), which is the magnitude of the Hilbert transform (also called 'complex trace'). It is always positive and has the added benefit of being phase-independent. Read more about envelope..

Which window to use?

Let the expected geology and basic geophysics and statistics guide all of your decisions. Use a window that captures the interval of interest (look at the wells!) without too much non-interesting stratigraphy. But use a big enough window that you don't see a lot of artifacts from large amplitude values coming in and out of the window (this also depends on the quality of the horizons and smoothness of the geology).

Windows don't have to be symmetrical about a horizon. It depends where the features you're interested in are. In my experience, stratigraphic windows are often useful — from one horizon to the next. If you're interested in the horizon itself, consider just using its amplitude directly. If it's too noisy, try improving the pick or smoothing the amplitude map, before confusing things by throwing more geology in there.

What does that caption mean?

Who knows what that caption means? Vague captions plague the geophysics literature. Don't be part of the problem! If only for the sake of your future self, record the exact statistic and its parameters on every image — even put it all in the filename.

Remember what you're trying to do

You're trying to relate the seismic to reservoir properties you care about. This means proving that the property is related to the seismic in as quantitative way as possible. A nice way to do this is to crossplot the property with the seismic attribute — that way you also know the error of the estimate. A map showing wiggly channels is interesting, but nowhere near enough.

I tend not to believe attribute analyses that don't include a crossplot.

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