A variety of vertical integration process for high resolution seismic imaging

Abstract:

Seismic prospecting, including long array multichannel seismic prospecting, ultrahigh resolution shallow profile prospecting and short trace interval short array high resolution multichannel seismic prospecting, make a great contribution to discover the marine oil-gas field. Seismic data have different dominant frequencies, resolution and penetration depth for different exploration purposes and methods. In seismic prospecting the long array has shot-receiver offset over several kilometers. Its trace interval and shot interval is about some decameters, while the dominant frequency is tens of hertz. Its penetration depth is thousands of meters. Its order of resolution in vertical and horizontal is meters to decameters. Ultrahigh resolution shallow profile prospecting data is used at well site and later for risk assessment with sonar data. We need its vertical and horizontal resolution come to at least decimeter level. Its frequency is about thousands hertz and penetration depth is about decameters. Small-interval, short array, high resolution multichannel seismic prospecting has compromise effect between long array multichannel seismic prospecting and ultrahigh resolution shallow profile prospecting. We can use this to link up long array multichannel seismic prospecting and ultrahigh resolution shallow profile prospecting vertically.

By mixing these different frequency seismic data one can maximize the advantages of these data. Since different seismic data can only achieve certain level of accuracy and quality in seismic imaging, there is no perfect method to process these data in vertical direction. Here, we propose to mix those data and achieve the integrated seismic processing. Base on mixing different seismic data, the cooperative process can take the advantage of mixing data to image different target layers. With this method we can lay bare mysteries of ocean bottom and deeper layer, provide assistance to find oil and gas, and provide services for oil-gas field sustainable exploration in different waters.

From the above, studying mixed high resolution data in different waters that acquired by different method is very important to exploring and developing.