煤层发育条件下薄储层预测方法研究

doi:10.11720/wtyht.2020.1397

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Abstract

There are multiple combinations of sandstone and mudstone interbeds and also plenty of coal seams in the middle-shallow strata of Mahu sag's slope zone, due to the slow slope background and shallow lake environment of water oscillation since Jurassic. In addition, the lithologic reservoir can be found in the zone, but the shielding effect of coal seam makes it impossible to predict the reservoir, due to the unclear response of the thin interbed from seismic and acoustic logs. Therefore, the wave impedance inversion cannot distinguish sandstone from mudstone clearly. In view of such a situation, the technique of Pseudo-acoustic curve reconstruction was used in this study. By analyzing multiple well logs, the density and neutron curves, which can weaken the influence of coal seam and reflect the characteristics of sandstone and mudstone interbeds, were selected to rebuild pseudo-acoustic curves and then perform inversion with the rebuilt curves, thus improving greatly the accuracy of reservoir prediction.

Key words： Mahu sag's slope zone coal seam thin-interbed sandstone pseudo-acoustic inversion reservoir prediction

Received: 14 August 2019 Published: 22 April 2020

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	Articles by authors
	Xue YANG
	Jia-Xue PEI
	Shao-Yong HE
	Xue-Feng JIANG
	Tian-Shou XIE
	Jian-Jun GAO

Cite this article:

Xue YANG,Jia-Xue PEI,Shao-Yong HE, et al. Research on thin reservoir prediction method in the coal seam distribution area[J]. Geophysical and Geochemical Exploration, 2020, 44(2): 406-411.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1397 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I2/406

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