年間 12 号発行
ISSN 印刷: 1091-028X
ISSN オンライン: 1934-0508
Indexed in
INVESTIGATING THE EFFECT OF MEDIAN PORE-THROAT DIAMETER ON SPONTANEOUS IMBIBITION
要約
Spontaneous imbibition (SI) plays an important role in the process of oil/gas recovery from fractured reservoirs. Scaling of SI data is a good way to investigate the factors controlling imbibition process and several classic scaling equations have been proposed. However, the effect of pore structure on SI process is insufficiently considered in these scaling equations. This work investigated the effect of median pore-throat diameter (D50) on SI process and proposed new scaling equations to compensate the effect of D50 on SI process. Three types of rocks, including Barnett shale, dolomite, and Indiana sandstone, were used in this study. Our results show that the wettability conditions of these three types of rocks could be determined by comparing scaled water and n-decane imbibition curves. Also, the imbibition curves of different rocks were better correlated after using these new scaling equations, which indicates that D50 as an index of pore structure significantly affects the process of SI.
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