Diffusion coefficient of carbon dioxide (CO2), a significant parameter describing the mass transfer process, exerts a profound influence on the safety of CO2 storage in depleted reservoirs, saline aquifers, and marine ecosystems. However, experimental determination of diffusion coefficient in CO2-brine system is time-consuming and complex because the procedure requires sophisticated laboratory equipment and reasonable interpretation methods. To facilitate the acquisition of more accurate values, an intelligent model, termed MKSVM-GA, is developed using a hybrid technique of support vector machine (SVM), mixed kernels (MK), and genetic algorithm (GA). Confirmed by the statistical evaluation indicators, our proposed model exhibits excellent performance with high accuracy and strong robustness in a wide range of temperatures (273–473.15 K), pressures (0.1–49.3 MPa), and viscosities (0.139–1.950 mPa·s). Our results show that the proposed model is more applicable than the artificial neural network (ANN) model at this sample size, which is superior to four commonly used traditional empirical correlations. The technique presented in this study can provide a fast and precise prediction of CO2 diffusivity in brine at reservoir conditions for the engineering design and the technical risk assessment during the process of CO2 injection.
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April 2019
Research-Article
Estimation of CO2 Diffusivity in Brine by Use of the Genetic Algorithm and Mixed Kernels-Based Support Vector Machine Model
Qihong Feng,
Qihong Feng
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
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Ronghao Cui,
Ronghao Cui
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: ronghao.cui1993@gmail.com
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: ronghao.cui1993@gmail.com
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Sen Wang,
Sen Wang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: fwforest@gmail.com
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: fwforest@gmail.com
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Jin Zhang,
Jin Zhang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong,
China University of Petroleum (East China),
Qingdao 266580, Shandong,
China
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Zhe Jiang
Zhe Jiang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
Search for other works by this author on:
Qihong Feng
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
Ronghao Cui
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: ronghao.cui1993@gmail.com
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: ronghao.cui1993@gmail.com
Sen Wang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: fwforest@gmail.com
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
e-mail: fwforest@gmail.com
Jin Zhang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong,
China University of Petroleum (East China),
Qingdao 266580, Shandong,
China
Zhe Jiang
School of Petroleum Engineering,
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
China University of Petroleum (East China),
Qingdao 266580, Shandong, China
1Corresponding authors.
Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received July 13, 2018; final manuscript received October 6, 2018; published online November 19, 2018. Assoc. Editor: Daoyong (Tony) Yang.
J. Energy Resour. Technol. Apr 2019, 141(4): 041001 (11 pages)
Published Online: November 19, 2018
Article history
Received:
July 13, 2018
Revised:
October 6, 2018
Citation
Feng, Q., Cui, R., Wang, S., Zhang, J., and Jiang, Z. (November 19, 2018). "Estimation of CO2 Diffusivity in Brine by Use of the Genetic Algorithm and Mixed Kernels-Based Support Vector Machine Model." ASME. J. Energy Resour. Technol. April 2019; 141(4): 041001. https://doi.org/10.1115/1.4041724
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