莺歌海盆地高温高压气藏水溶气释放对气水界面的影响

马勇新; 肖前华; 米洪刚; 戚志林; 黄小亮; 任星明

doi:10.3799/dqkx.2017.527

Volume 42 Issue 8

Aug. 2017

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Article Navigation > Earth Science > 2017 > 42(8): 1340-1347

Ma Yongxin, Xiao Qianhua, Mi Honggang, Qi Zhilin, Huang Xiaoliang, Ren Xingming, 2017. Influence of Water-Soluble Gas Releasing on Gas-Water Interface for Yinggehai Basin High Temperature and Overpressured Gas Field. Earth Science, 42(8): 1340-1347. doi: 10.3799/dqkx.2017.527

Citation:

Ma Yongxin, Xiao Qianhua, Mi Honggang, Qi Zhilin, Huang Xiaoliang, Ren Xingming, 2017. Influence of Water-Soluble Gas Releasing on Gas-Water Interface for Yinggehai Basin High Temperature and Overpressured Gas Field. Earth Science, 42(8): 1340-1347. doi: 10.3799/dqkx.2017.527

Citation:

Ma Yongxin, Xiao Qianhua, Mi Honggang, Qi Zhilin, Huang Xiaoliang, Ren Xingming, 2017. Influence of Water-Soluble Gas Releasing on Gas-Water Interface for Yinggehai Basin High Temperature and Overpressured Gas Field. Earth Science, 42(8): 1340-1347. doi: 10.3799/dqkx.2017.527

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Influence of Water-Soluble Gas Releasing on Gas-Water Interface for Yinggehai Basin High Temperature and Overpressured Gas Field

doi: 10.3799/dqkx.2017.527

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
Zhanjiang Branch of CNOOC, Zhanjiang 524057, China
3.
School of Petroleum Engineering, Chongqing University of Science & Technology, Chongqing 401331, China

Received Date: 2017-01-13
Publish Date: 2017-08-15

Abstract

Abstract

Yinggehai basin X area belongs to high-temperature and high-pressure gas reservoir, so that the content of dissolved gas in water is very large. However, the changing characteristics of gas-water interface and water invasion regularity is unknown because of the releasing of dissolved gas in water. In this paper, the variation of dissolved gas in water of different formations in X was tested through PVT facilities using natural gas and formation water. The sand packed model with visualization was designed to investigate the influence of water-soluble gas on gas-water interface. Results show that the solubility of water-soluble gas is affected by temperature, pressure, salinity and the components of natural gas, gradually increases with the increase of pressure, decreases with the increase of the temperature at first and then increases and the inflection point temperature is about 80-90℃. The solubility of water-soluble gas is 22.5 m³/m³, and 8.7 m³/m³ for X-1 and X-2 under condition of 145℃, 54 MPa respectively. Sand packed model with visualization experiment shows that the gas-water interface increases obviously in the process of natural depletion because of migration with gas releasing from the water, the pressure decreasing of formation water and capillary force. Numerical simulation of gas reservoir shows that gas-water interface of reservoir with high solubility of water-soluble gas increase faster and the water breakthrough time is earlier than those reservoirs with low solubility of water-soluble gas. During 10 years forecast period, water breakthrough in X-1 is about 800 days earlier, 800 m faster on the plane and 7.3 m faster on the vertical, considering water-soluble gas. And for X-2, those are 300 days, 500 m and 7.0 m respectively.
- high-temperature and high-pressure,
- natural gas field,
- water-soluble gas,
- gas-water interface,
- sand packed model with visualization,
- petroleum geology

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References(56)

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Influence of Water-Soluble Gas Releasing on Gas-Water Interface for Yinggehai Basin High Temperature and Overpressured Gas Field

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