Comparison of Completion and Heterogeneity Effect on CO₂ Sequestration in Shallow and Deep Saline Aquifers

Author

Fang Yang
Baojun Bai, Missouri University of Science and TechnologyFollow
Dazhen Tang
Shari Dunn-Norman, Missouri University of Science and TechnologyFollow
David J. Wronkiewicz, Missouri University of Science and TechnologyFollow

Abstract

The effect of completion techniques and reservoir heterogeneity on CO₂ storage and injectivity in saline aquifers has been studied using a compositional reservoir simulator CMG-GEM. Two reservoir models were built using data extracted from publications, to represent a deep saline aquifer and a shallow aquifer. The effect of completion methods, including partial perforation of the reservoir net pay (partial completion), well geometry, orientation, location and length, on CO₂ storage are discussed. Heterogeneity effect has been addressed considering three parameters: mean permeability, vertical to horizontal permeability ratio, and permeability variation. Sensitivity analysis was carried out using design of experiments (DOE) to determine the dominant factors affecting CO₂ storage capacity and CO₂ injectivity. Simulation results show that completing all layers, using horizontal wells set in upper layers with a length around 250-300 m are the most favorable choices for CO₂ storage capacity in the aquifer examined. Mean permeability affects CO₂ storage capacity and injectivity the most; k_v/k_h affects CO₂ injectivity storage capacity more than permeability variation, V_k. More CO₂ can be stored in the heterogeneous reservoirs with low mean permeability; however, high injectivity can be achieved in the uniform reservoirs with high mean permeability.

Recommended Citation

F. Yang et al., "Comparison of Completion and Heterogeneity Effect on CO₂ Sequestration in Shallow and Deep Saline Aquifers," Proceedings of the International Oil and Gas Conference and Exhibition in China: Opportunities and Challenges in a Volatile Environment (2010, Beijing, China), vol. 3, pp. 1841 - 1851, Society of Petroleum Engineers (SPE), Jun 2010.

Meeting Name

International Oil and Gas Conference and Exhibition in China: Opportunities and Challenges in a Volatile Environment (2010: Jun. 8-10, Beijing, China)

Department(s)

Geosciences and Geological and Petroleum Engineering

Keywords and Phrases

Compositional Reservoir Simulators; Deep Saline Aquifers; Dominant Factor; Heterogeneity Effects; Heterogeneous Reservoirs; Injectivity; Permeability Ratio; Reservoir Heterogeneity; Reservoir Models; Saline Aquifers; Shallow Aquifers; Simulation Result; Storage Capacity; Three Parameters; Upper Layer

International Standard Book Number (ISBN)

978-1617388866

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Society of Petroleum Engineers (SPE), All rights reserved.

Publication Date

01 Jun 2010