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Petroleum Science >2018, Issue 3: 484-497 DOI: https://doi.org/10.1007/s12182-018-0242-1

Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China Open Access

文章信息

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作者：Yuan-Yin Zhang, Zhi-Jun Jin, Ye-Quan Chen, Xi-Wu Liu, Lei Han and Wu-Jun Jin

作者单位：

Oil and Gas Survey, China Geological Survey, Beijing 100083, China; State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China,State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China and State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China; State Energy Center for Shale Oil Research and Development, Beijing 100083, China; Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China; Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China

投稿时间：2017-10-16

引用方式：Zhang, YY., Jin, ZJ., Chen, YQ. et al. Pet. Sci. (2018) 15: 484. https://doi.org/10.1007/s12182-018-0242-1

文章摘要

For a typical marine shale reservoir in the Jiaoshiba area, Sichuan Basin of China, P-impedance is sensitive for identifying lithology but not suitable for indicating good shale reservoirs. In comparison, density is an important quantity, which is sensitive for identifying the organic-rich mud shale from non-organic-rich mud shale. Due to the poor data quality and incidence angle range, density cannot be easily inverted by directly solving the ill-posed pre-stack seismic inversion in this area. Meanwhile, the traditional density regularizations implemented by directly using the more robust P-impedance inversion tend to be inaccurate for recovering density for this shale reservoir. In this paper, we combine the P-impedance and the minus uranium to construct the pseudo-P-impedance (PIp) at well locations. The PIp is observed to be sensitive for identifying organic-rich mud shale and has a good correlation with density in this area. We employ the PIp–density relation into the pre-stack inversion framework to estimate density. Three types of regularization are tested on both numerical and field data: These are no regularization, traditional regularization and the proposed approach. It is observed that the proposed method is better for recovering the density of organic-rich mud shale in the Jiaoshiba area.

关键词

Density inversion, Pseudo-P-impedance, Pure P-wave data, Regularization