Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction

Liu Xiaochen; Lu Yongchao; Du Xuebin; Li Xiangquan; Lin Weibing; Zhang Jingyu; Feng Lin

doi:10.19509/j.cnki.dzkq.2020.0311

Volume 39 Issue 3

May 2020

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Article Navigation > Bulletin of Geological Science and Technology > 2020 > 39(3): 99-109

Liu Xiaochen, Lu Yongchao, Du Xuebin, Li Xiangquan, Lin Weibing, Zhang Jingyu, Feng Lin. Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 99-109. doi: 10.19509/j.cnki.dzkq.2020.0311

Citation:

Liu Xiaochen, Lu Yongchao, Du Xuebin, Li Xiangquan, Lin Weibing, Zhang Jingyu, Feng Lin. Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 99-109. doi: 10.19509/j.cnki.dzkq.2020.0311

Citation:

Liu Xiaochen, Lu Yongchao, Du Xuebin, Li Xiangquan, Lin Weibing, Zhang Jingyu, Feng Lin. Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 99-109. doi: 10.19509/j.cnki.dzkq.2020.0311

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Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction

doi: 10.19509/j.cnki.dzkq.2020.0311

Received Date: 10 Nov 2019

Abstract

Abstract

The spatial distribution of the sand reservoir in Xihu Depression is difficult to predict precisely by using traditional geophysical techniques, owing to the following two main reasons:1)The single-layer thickness of the sand reservoir is thin; and 2)Interbeds of sandstone and mudstone show rapid and frequent lateral lithofaices change.Based on geological data and geophysical techniques, the isochronous sequence stratigraphic framework of the Eocene Pinghu Formation in Pinghu slope belt of Xihu Depression was established.The sandbody distribution within the sequence stratigraphic framework was predicted by using geostatistical inversion.The result shows that Pinghu Formation can be divided into three 3rd-order sequences.The lower sandbody is characterized by large single layer thickness, good lateral continuity, and contiguous plane development.The middle part is composed mainly of mudstone, with the isolated sandbody and poor continuity.The upper part exhibits an increase trend in layer thickness in sandbody with fine lateral continuity.Comparison of the geophysical research with traditional geological research reveals that the vertical resolution of sandbody prediction results obtained by geostatistical inversion could reach a resolution down to 1-2 m.The results indicate that geostatistical inversion is an effective approach to solve the problem on precise lithofacies identification and spatial distribution prediction by using 3D seismic data in Xihu Depression, providing valuable guidance for the favorable reservoir prediction in the future.
- sequence stratigraphy,
- geostatistical inversion,
- reservoir prediction,
- Xihu Depression

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References(37)

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Application of geostatistical inversion constrained by sequence framework in thin-bedded sandbody prediction

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