Have you computed models (synthetic seismograms)? Can you reasonably expect to see detectable changes in the seismic data?

Dear Na Li ,

For example, you may have the next opportunities:

1. You need to have a real comparison basis minimum of one (drilled borehole) in the studied area

2. If you do not have such a borehole... try to find such a field that s well known

3. You need a good geostructural knowledge of the studied area onto of its sounding,

4. Try to find a good geologist modeler

[I cannot tell I am not paid for my geological skill, that is why I am not crackpot to tell more ]

In the next, only one thing I can help you... If you give me a reference point of the studied area [river, coordinate, city] can tell you where you which nearby areas should be good for the research...

Cordially,

Laszlo

Dear Na Li ,

I do not need a reference point... Your research is in East China ˙(offshore). It seems connected to the deltaic environment... In such a case you have a situation: it is difficult to detect the thin sand layers with the geophysical method you are using

In this case write out why you have problems, and what kind of seismo-geophysics method (technology) can resolve this problem... If you do not can use your method write it down, and try to go in the direction of comparing it with geophysical data of drilled boreholes... You have more boreholes that is why you can see them...

Be careful never to believe interpreters' interpretations... Eight years have worked in hydrocarbon exploration... I observed that the interpretations were made erroneous (perhaps intentionally, political reason; or were made to qukly for rapid decide )...

Or to try to make the interpretation by using more thin sand layers

Regards,

Laszlo