Application of reverse-time migration technique in imaging of Hejian buried-hill inside

doi:10.3969/j.issn.1672-7703.2017.02.013

Abstract

Abstract: As the exploration and development spread to deep subtle reservoirs, the palaeo buried-hill reservoir becomes one of the major targets. The Hejian buried-hill inside is characterized by large depth, complicated structures and low S/N ratio, which brings about great challenges to the precise imaging and structure confrmation of the buried-hill inside. This paper presented the basic principle of reversetime migration based on the two-way wave equation, including higher-order fnite difference wave feld extrapolation algorithm and perfectly matched layer absorbing boundary conditions. After the characteristics of the Hejian buried-hill inside were analyzed, the reverse-time migration and traditional pre-stack depth migration were used to process the model data and actual data. The results show that the reverse-time migration can realize precise imaging of the Hejian buried-hill inside, with better performance than the traditional method.

Key words: Hejian buried-hill, buried-hill inside, reverse-time migration, higher-order fnite difference

CLC Number:

P631.4

Wu Tao, Hu Jinkuan, Zhou Xinghai, Shi Fengfeng, Ye Qiuyan, Li Chenghai, Xu Zhenwang. Application of reverse-time migration technique in imaging of Hejian buried-hill inside[J]. China Petroleum Exploration, 2017, 22(2): 110-115.

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