提高蚂蚁追踪裂缝预测精度的应用研究

doi:10.11720/wtyht.2021.1208

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Abstract

The YS1 area in Sichuan basin has undergone multiple stages of tectonic evolution.The faults are characterized by multiple stages and multiple strikes,and serious mud losses occurred in the drilled well.It is difficult to finely characterize fracture and analyze structural development when the conventional seismic interpretation method is used.In this study,according to the actual situation,ant tracking technology was used to predict fractures,whose accuracy was improved by noise reduction,continuity enhancement,fault boundaries height,and fake structures elimination.The process is as follows:firstly,the input seismic data volume is pre-processed by structure-oriented filtering and discontinuity detection,then the ant tracking parameter settings are optimized,and finally the ant tracking under the occurrence control is performed.The data can not only be used to assist fault interpretation but also provide a data basis for subsequent fault development analysis and horizontal well location deployment.

Key words： ant tracking fracture prediction structure-oriented filtering discontinuity detection attitude-controlling

Received: 26 April 2021 Published: 15 December 2021

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	Articles by authors
	Qing-Hui XIE
	Li-Wei JIANG
	Chun-Duan ZHAO
	Zhong-Da WANG
	Xie-Hua TANG
	Yu-Feng LUO

Cite this article:

Qing-Hui XIE,Li-Wei JIANG,Chun-Duan ZHAO, et al. Application study of improving the precision of the ant-tracking-based fracture prediction technique[J]. Geophysical and Geochemical Exploration, 2021, 45(5): 1295-1302.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1208 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I5/1295

Optimized ant tracking workflow

Structure-oriented filtering maps in YS1 area
a—original seismic profile;b—seismic profile after structure-oriented filtering

Seismic attributes slices in YS1 area
a—variance slice;b—max curvature slice;c—chaos slice

Parameters and meanings of ant tracking

Ant tracking slices in YS1 area
a—passive ant tracking;b—aggressive ant tracking;c—occurrence-controlled aggressive ant tracking

Stereonet map using by occurrence controlled in Petrel

Ant tracking slices with different trends in YS1 area

Overlapping maps of fault polygons with seismic attributes
a—overlapping map with variance;b—overlapping map with ant tracking

Seismic profile crossing YS1-3
a—original seismic profile;b—ant tracking

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