Interpretation of the Dominant Channel of Co2 Migration Using 4d Seismic Texture Attributes

10 Pages Posted: 9 Apr 2021

See all articles by Jinfeng Ma

Jinfeng Ma

Northwest University (China)

Zhe Wang

Northwest University (China)

Lin Li

Northwest University (China)

Haofan Wang

Northwest University (China)

Xiaoli Zhang

Northwest University (China) - Department of Geology

Yang Yang

Northwest University (China)

Yadong Wang

Northwest University (China) - Scientific and Technology Office

Date Written: April 8, 2021

Abstract

Conventional seismic attributes can be effectively used in 4D seismic monitoring. However, these seismic attributes have limitations for the identification of reservoir heterogeneity or anisotropy, and could not explain the characteristics of reservoir changes in the process of CO2 injection and storage. Due to the heterogeneity of the reservoir, the reservoir property has not been interpreted clearly during CO2-EOR and storage in G89 block of Sinopec Shengli Oil Company,China. Based on gray level cooccurrence matric, we applied seismic texture analysis method into 4D seismic data to discriminate CO2 migration pathways and distribution. The difficulty of texture attributes analysis of 4D seismic difference lies in attributes selection firstly. That means which attribute can be chosen and used to identify the changes of reservoir parameters before and after CO2 injection. And then how to obtain the 4D seismic difference attributes of the reservoir. We calculate the seismic texture attributes of the reservoir by means of the caprock consistency processing method of two vintages of 3D seismic datasets. Then the difference attributes background interference is reduced much, and the contrast between the fault and background information is increased, which obviously enhances the visibility of the plane characterization of the reservoir. The difference of 3D seismic texture attributes shows the better image of breakthrough path and distribution of CO2. It indicates the dominate channel lead to the CO2 breakthrough and moved to the highest location of the geological structure

Keywords: 4D seismic texture attributes; CO2-EOR; Sweep area;Caprock consostency;

Suggested Citation

Ma, Jinfeng and Wang, Zhe and Li, Lin and Wang, Haofan and Zhang, Xiaoli and Yang, Yang and Wang, Yadong, Interpretation of the Dominant Channel of Co2 Migration Using 4d Seismic Texture Attributes (April 8, 2021). Proceedings of the 15th Greenhouse Gas Control Technologies Conference 15-18 March 2021, Available at SSRN: https://ssrn.com/abstract=3822053 or http://dx.doi.org/10.2139/ssrn.3822053

Jinfeng Ma (Contact Author)

Northwest University (China) ( email )

229 Taibai North Rd
Beilin
Xian, Shaanxi
China

Zhe Wang

Northwest University (China)

229 Taibai North Rd
Beilin
Xian, Shaanxi
China

Lin Li

Northwest University (China)

229 Taibai North Rd
Beilin
Xian, Shaanxi
China

Haofan Wang

Northwest University (China)

229 Taibai North Rd
Beilin
Xian, Shaanxi
China

Xiaoli Zhang

Northwest University (China) - Department of Geology ( email )

Xi’an Shaanxi, 710069
China

Yang Yang

Northwest University (China)

229 Taibai North Rd
Beilin
Xian, Shaanxi
China

Yadong Wang

Northwest University (China) - Scientific and Technology Office

229 Taibai Road
Xi an, 710069
China

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