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Special Topics & Reviews in Porous Media: An International Journal
ESCI SJR: 0.376 SNIP: 0.466 CiteScore™: 0.83

ISSN Imprimer: 2151-4798
ISSN En ligne: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.2018022574
pages 21-26

STUDY ON GAS WETTABILITY BASED ON SINGLE STRAIGHT CAPILLARY

Min Zhang
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Chunlei Yu
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Yong Yang
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Yeheng Sun
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Yigen Zhang
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Baoquan Sun
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China
Weiyu Yang
Shengli Oilfield Exploration and Development Research Institute, Dongying, Shandong, 257000, China

RÉSUMÉ

Gas wetness plays an important role in enhancing the recovery in gas reservoirs, especially in low-permeability ones. In the study, the sessile drop method is used to measure quantitatively gas wettability of the slide. After treating by various concentration of fluorocarbon polymer (Zonyl8740) solutions, the inside walls of capillary present different levels of gas wetness. Quasi-static water-driving gas experiments were conducted in gas/water system in the capillaries. The effect of gas wetness on the front of water-displacing gas was investigated. The results showed that gas wettability of capillary inside walls gets strong with the increase of fluorocarbon polymer solution concentration, gas/water interfaces of the water driving gas front shows different shapes under different gas-wetness conditions, and capillary force is resistance of water-displacing gas in the case of preferential gas wettability, while it is the power in the case of non-gas wettability. The study provides theoretical support for raising the water displacement recovery in gas reservoirs by gas wettability reversal improving gas/water seepage situation.


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