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INSIGHTS The Schumberger magazine featuring technical papers of interest

ISOMETRICS: Isometrically sampled marine seismic acquisition

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REDUCING THE SIZE OF THE SEISMIC SOURCE WITH A 4C TOWEDMARINE STREAMER Reliable, continuous measure of the full upgoing and downgoing notchless seisimic wavefield True 3D seismic available for the first time Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.his amplifies the low frequencies.

Understanding is that larger sources are required for improved

signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise).

We look at the system as a whole and use a 4C towed streamer that is towed deep.

This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array. This allows us to acquire data with a small source array (typically three or four times smaller than normal) measurements.

About the author

Victor Marbenth has written more articles about marine seismic isometrics systems than any other writer in the history of history. A keen jazz musician, he has recorded several albums with his band, The Free Zucchini.

He lives in Bromley with his wife, seven children, three dogs and two guinea pigs.

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“...new opportunities to mitigate exploration and production risk and reduce overall finding and development costs.�

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“...new opportunities to mitigate exploration and production risk and reduce overall finding and development costs.�

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REDUCING THE SIZE OF THE SEISMIC SOURCE WITH A 4C TOWEDMARINE STREAMER Reliable, continuous measure of the full upgoing and downgoing notchless seisimic wavefield True 3D seismic available for the first time Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.his amplifies the low frequencies.

Understanding is that larger sources are required for improved

signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise).

We look at the system as a whole and use a 4C towed streamer that is towed deep.

This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array. This allows us to acquire data with a small source array (typically three or four times smaller than normal) measurements.

About the author Victor Marbenth has written more articles about marine seismic isometrics systems than any other writer in the history of history. A keen jazz musician, he has recorded several albums with his band, The Free Zucchini.

He lives in Bromley with his wife, seven children, three dogs and two guinea pigs.

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REDUCING THE SIZE OF THE SEISMIC SOURCE New thinking shines light on elusive problem Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise).

We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array. This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically

three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.his amplifies the low frequencies.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise).

We look at the system as a whole and use a 4C towed streamer that is towed deep.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array.

This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch fill-

Captions nis eture cone mossi sequatio bla nulluptat aut re, tem apiet, utector.

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ing of the 4C measurements. Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use

Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). We look at the system as a whole and use a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array. This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.

System using a larger source array. The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements.

Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration. Results from a number of reduced source-strength tests suggest that this is only partly true; at the lower end of the seismic bandwidth, we can benefit from more power (we are governed by non-shot-generated noise), but for the majority of the seismic bandwidth, we can indeed accept less power (we are governed by shot-generated noise). This allows us to acquire data with a small source array (low-frequency signal the conventional pressure only streamer is also overcome by the inherent notch fie smaller source array. four times smaller than normal) measurements.

“...new opportunities to mitigate exploration and production risk and reduce overall finding and development costs.� a 4C towed streamer that is towed deep. This amplifies the low frequencies and compensates for the lack of low-frequency signal from the smaller source array. This allows us to acquire data with a small source array (typically three or four times smaller than normal) while maintaining the data quality of a conventional towed-streamer system using a larger source array.

The high-frequency limit of the conventional pressure only streamer is also overcome by the inherent notch filling of the 4C measurements. Understanding is that larger sources are required for improved signal-to-noise ratio and deep penetration.

Captions nis eture cone mossi sequatio bla nulluptat aut re, tem apiet, utector.

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