高密度三维区沙四段灰岩有利储层地震预测

doi:10.11720/wtyht.2021.1368

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Abstract

Yidong fault zone is rich in oil and gas,and the exploration space of the tertiary lithology body is large,but the exploration degree is low.The main reason restricting the exploration efficiency is that the reservoir heterogeneity is strong and the distribution rule is complex.At the same time,due to the limitation of seismic data and conventional seismic prediction technology,the favorable reservoir seismic prediction of lithologic body is difficult.Based on the high density three-dimensional azimuth seismic data of YD area,the authors carried out the research on the favorable reservoir seismic prediction of the fourth member of Shahejie Formation.Firstly,the difference of azimuth seismic properties was used to predict the distribution of fractures in the reservoir.Then the anisotropic reservoir prediction technique based on anisotropic parameter inversion was used to describe the anisotropic characteristics of the reservoir.Finally,combined with the results of two kinds of seismic prediction techniques,with the fracture distribution as the main predicted object and the reservoir anisotropy characteristic as the restricted condition,the authors described the fracture development degree of the limestone reservoir in the fourth member of Shahejie Formation comprehensively and improved the prediction accuracy of the favorable limestone reservoir in the fourth member of Shahejie Formation.

Key words： high density 3D favorable reservoir seismic prediction YD fault zone

Received: 21 July 2020 Published: 15 December 2021

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	Articles by authors
	Hai-Ning LIU
	Hong-Wei HAN
	Wen WEI
	Yun-Yin ZHANG
	Jing-Pu ZHAO

Cite this article:

Hai-Ning LIU,Hong-Wei HAN,Wen WEI, et al. Seismic prediction of favorable limestone reservoirs in the fourth member of Shahejie Formation in YD high density 3D area[J]. Geophysical and Geochemical Exploration, 2021, 45(5): 1281-1287.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1368 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I5/1281

The reservoirs anisotropic forward modeling with different lithology

Anisotropic characteristics of top and bottom surfaces of fractured reservoirs
a—azimuth gather;b—azimuth ellipse amplitude

Anisotropic characteristics forward modeling of target interval in well YD301
a—anisotropic forward modeling results of YD301 well;b—analysis of azimuthal anisotropy at 3612.95 m of YD301 well

Fracture density and direction prediction of limestone reservoir in YD301 well area
a—fracture density of reservoir;b—fracture direction of reservoir

Inversion results of limestone reservoir anisotropic parameters in YD301 well area

The prediction results of favorable limestone reservoir in the fourth member of Shahejie Formation in YD301 well area

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