MgCl_2对动态润湿角的影响

Effect of MgCl_2 on the dynamic wetting angle and kinetic model

油气藏水驱过程中,存在大量离子交换过程,从而导致水相中离子浓度的改变,为了研究这一动态过程,以石英为研究对象,用接触角测定仪研究了MgCl2浓度对石英表面接触角的影响。结果表明,液固之间的接触角是一个动态变化的过程,接触角总是随时间的增加而减小,减小速度初期较大,后期较小,随着MgCl2浓度的增加,接触角先增加后减小。

During water flood ing process in oil and gas reservoir,the existence of a large number of ion exchange results in changing of ion concentration in aqueous phase.In orderto study the dynamic process,with quartz as the research object,the effects of MgCl2 concentration on the quartz surface contact angle were studied with the contact angle tester.The results showed that the contact angle between the liquid and solid is a dynamic process.The contact angle is always decreases with increasing timet.With the increase of MgCl2 concentration,the contact angle increased first and then decreased.