Petroleum Science >2015,??Issue 2:??293-303 DOI: https://doi.org/10.1007/s12182-015-0023-z
Diffusion coefficients of natural gas in foamy oil systemsunder high pressures Open?Access
文章信息
作者：Yan-Yu Zhang,Xiao-Fei Sun,Xue-Wei Duan and Xing-Min Li
作者单位：
College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong, China School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China The Department of Chemical and Petroleum Engineering, University of Cal;College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
投稿时间：2014-05-18
引用方式：Zhang, YY., Sun, XF., Duan, XW. et al. Pet. Sci. (2015) 12: 293. https://doi.org/10.1007/s12182-015-0023-z
文章摘要
The diffusion coefficient of natural gas in
foamy oil is one of the key parameters to evaluate the
feasibility of gas injection for enhanced oil recovery in
foamy oil reservoirs. In this paper, a PVT cell was used to
measure diffusion coefficients of natural gas in Venezuela
foamy oil at high pressures, and a new method for determining
the diffusion coefficient in the foamy oil was developed
on the basis of experimental data. The effects of
pressure and the types of the liquid phase on the diffusion
coefficient of the natural gas were discussed. The results
indicate that the diffusion coefficients of natural gas in
foamy oil, saturated oil, and dead oil increase linearly with
increasing pressure. The diffusion coefficient of natural gas
in the foamy oil at 20 MPa was 2.93 times larger than that
at 8.65 MPa. The diffusion coefficient of the natural gas in
dead oil was 3.02 and 4.02 times than that of the natural
gas in saturated oil and foamy oil when the pressure was
20 MPa. However, the gas content of foamy oil was 16.9
times higher than that of dead oil when the dissolution time
and pressure were 20 MPa and 35.22 h, respectively.
foamy oil is one of the key parameters to evaluate the
feasibility of gas injection for enhanced oil recovery in
foamy oil reservoirs. In this paper, a PVT cell was used to
measure diffusion coefficients of natural gas in Venezuela
foamy oil at high pressures, and a new method for determining
the diffusion coefficient in the foamy oil was developed
on the basis of experimental data. The effects of
pressure and the types of the liquid phase on the diffusion
coefficient of the natural gas were discussed. The results
indicate that the diffusion coefficients of natural gas in
foamy oil, saturated oil, and dead oil increase linearly with
increasing pressure. The diffusion coefficient of natural gas
in the foamy oil at 20 MPa was 2.93 times larger than that
at 8.65 MPa. The diffusion coefficient of the natural gas in
dead oil was 3.02 and 4.02 times than that of the natural
gas in saturated oil and foamy oil when the pressure was
20 MPa. However, the gas content of foamy oil was 16.9
times higher than that of dead oil when the dissolution time
and pressure were 20 MPa and 35.22 h, respectively.
关键词
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Foamy oil Diffusion coefficient Heavy oil Gas injection High pressure