Optimization of multi-vessel wide-azimuth observation system for seismic observation in offshore production zones: A case study on Xihu sag, East China Sea

Abstract

Abstract: As the discovered offshore oil and gas fields are successively put into development and production, the requirements for seismic data quality are increasing. In this paper, based on conventional wide-azimuth observation system, and considering the actual geological conditions of the Xihu sag in the East China Sea and the situations of existing equipment, a new multi-vessel wide-azimuth observation system was designed to meet geological requirements by changing the voyage frequency and vessel deployment. In practical seismic acquisition, against the platform influence, geometry-variable design was also applied as a supplement to the survey lines that cannot be implemented by original observation system. Finally, an optimized design of multi-vessel wide-azimuth observation system was developed for seimsic acquisition in offshore production zones.

Key words: wide-azimuth, acquisition design, geometry-variable design, Xihu sag

Jiang Yu, Chen Hua, Yao Gang, Li Yanqing. Optimization of multi-vessel wide-azimuth observation system for seismic observation in offshore production zones: A case study on Xihu sag, East China Sea[J]. China Petroleum Exploration, 2016, 21(4): 114-120.

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