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

Abstract 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...

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Autores principales:	Yuan-Yin Zhang, Zhi-Jun Jin, Ye-Quan Chen, Xi-Wu Liu, Lei Han, Wu-Jun Jin
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2018
Materias:	Density inversion Pseudo-P-impedance Pure P-wave data Regularization Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/572a9816a76d4be19c4dd6fe6154b5e9
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spelling	oai:doaj.org-article:572a9816a76d4be19c4dd6fe6154b5e92021-12-02T08:07:54ZPre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China10.1007/s12182-018-0242-11672-51071995-8226https://doaj.org/article/572a9816a76d4be19c4dd6fe6154b5e92018-07-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-018-0242-1https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract 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.Yuan-Yin ZhangZhi-Jun JinYe-Quan ChenXi-Wu LiuLei HanWu-Jun JinKeAi Communications Co., Ltd.articleDensity inversionPseudo-P-impedancePure P-wave dataRegularizationScienceQPetrologyQE420-499ENPetroleum Science, Vol 15, Iss 3, Pp 484-497 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Density inversion Pseudo-P-impedance Pure P-wave data Regularization Science Q Petrology QE420-499
spellingShingle	Density inversion Pseudo-P-impedance Pure P-wave data Regularization Science Q Petrology QE420-499 Yuan-Yin Zhang Zhi-Jun Jin Ye-Quan Chen Xi-Wu Liu Lei Han Wu-Jun Jin Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
description	Abstract 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.
format	article
author	Yuan-Yin Zhang Zhi-Jun Jin Ye-Quan Chen Xi-Wu Liu Lei Han Wu-Jun Jin
author_facet	Yuan-Yin Zhang Zhi-Jun Jin Ye-Quan Chen Xi-Wu Liu Lei Han Wu-Jun Jin
author_sort	Yuan-Yin Zhang
title	Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
title_short	Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
title_full	Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
title_fullStr	Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
title_full_unstemmed	Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
title_sort	pre-stack seismic density inversion in marine shale reservoirs in the southern jiaoshiba area, sichuan basin, china
publisher	KeAi Communications Co., Ltd.
publishDate	2018
url	https://doaj.org/article/572a9816a76d4be19c4dd6fe6154b5e9
work_keys_str_mv	AT yuanyinzhang prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina AT zhijunjin prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina AT yequanchen prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina AT xiwuliu prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina AT leihan prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina AT wujunjin prestackseismicdensityinversioninmarineshalereservoirsinthesouthernjiaoshibaareasichuanbasinchina
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Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China

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