Open Access

ARTICLE

Effect of Gas-wetness on Gas-water Two-phase Seepage in Visual Microscopic Pore Models

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1 MOE Key Laboratory of Petroleum Engineering, China University of Petroleum; Beijing, China.
2 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum; Beijing, China.
3 Marine Oil Extraction Plant of Shengli Oilfield, Shandong, Dongying, China.

Structural Longevity 2013, 10(1), 19-26. https://doi.org/10.3970/sl.2013.010.019

Abstract

Theoretical analyses and experimental results show that gas wettability plays an important role on gas-well production. In the study, the gas-wet ability parameter of gas vs. liquid ζ_G-L, calculated from the proposed formula in the sessile drop method, used to measure gas wettability of microscopic pore models treated by fluorocarbon polymer Zonyl8740. Following that, the effect of gas-wetness on gas-water two-phase seepage in models was studied by stereomicroscope with a camera. Research results show that, under the condition of the pore structure is constant and displacement velocity is very slow, capillary force is the main motivation for two-phase seepage, and gas wettability has a crucial influence on gas/water interface, displacement characteristics, and distribution of gas and water. It is valuable for development of water flooding gas reservoirs.

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Keywords

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