Spontaneous Imbibition of Brine and Oil in Gas Shales: Effect of Water Adsorption and Resulting Microfractures

被引：372

作者：

Dehghanpour, H. ^{[1
]}

Lan, Q. ^{[1
]}

Saeed, Y. ^{[1
]}

Fei, H. ^{[1
]}

Qi, Z. ^{[1
]}

机构：

[1] Univ Alberta, Sch Min & Petr Engn, Dept Civil & Environm Engn, Edmonton, AB T6G 2W2, Canada

来源：

ENERGY & FUELS | 2013年 / 27卷 / 06期

关键词：

LOW-PERMEABILITY; POROUS-MEDIA; RECOVERY; DAMAGE; WETTABILITY; SATURATION; SURFACTANT; RESERVOIRS; POTASSIUM; COCURRENT;

D O I：

10.1021/ef4002814

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

We measure spontaneous imbibition of aqueous (deionized water and KCl solutions of various concentrations) and oleic (kerosene and iso-octane) phases in several dry organic shale samples selected from two wells drilled in the Horn River basin. We find that the imbibition rate of aqueous phases is much higher than that of oleic phases even when plotted versus scaling dimensionless time, contrary to capillary-driven imbibition models. The observed difference is more pronounced in samples with higher day content. The results suggest that the excess water intake is due to (1) the additional driving force provided through water adsorption by clay minerals, and (2) the enhancement of sample permeability through adsorption-induced microfractures.

引用

页码：3039 / 3049

页数：11