Dissipation Rates of Osmotic Pressures in Geologic Membrane Systems

通过粘土和页岩的渗透流会导致异常的 地下的静水压力。 在过去的15年里， 多年来，在粘土膜上进行的实验表明， 像粘土这样的膜功能材料的选择渗透性， 足够高以产生可观的磁感应强度 地下的静水压力。 尚待解决的是 南极洲产生的压力是否可持续， 长期现象，如自流条件和逆冲断层。 渗透压的消散可以通过测量3 粘土膜的唯象系数。 其中的 溶质渗透系数（W）是最重要的， 确定渗透细胞下降的速率。 到目前为止， 不存在（W）InN粘土膜系统的数据， 类似于深层沉积盆地中弱透水层物质的孔隙。 这项研究建议衡量的比率， 重力产生的静水压力通过 各种孔隙率的膨润土膜。 这些数据，主要是在 （w）值的形式，将有助于解决动力学难题， 地质膜系统 如果这些数据显示渗透- 压力消散非常缓慢，那么这将导致 对造成异常流体静力学的机制的重新评估 地下的压力--特别是对于深层沉积物 盆。

Osmotic flow through clays and shales can result in anomalous hydrostatic pressures in the subsurface. Within the past 15 years, experiments conducted on clay membranes have shown that the permselectivity of membrane-functioning materials like clay is sufficiently high to generate appreciable osmotically-induced hydrostatic pressure in the subsurface. Yet to be resolved is whether osmotic-generated pressures are sustainable to explain long-term phenomena like artesian conditions and thrust faulting. Dissipation of osmotic pressure can be tested by measuring 3 phenomenological coefficients of the clay membrane. Of these, the solute permeability coefficient (w) is the most important in determining the rate at which an osmotic cell runs down. To date, there exists no data for (w) inn clay membrane systems having low porosities akin to aquitard materials in deep sedimentary basins. This study proposes to measure the rates at which osmotically-generated hydrostatic pressures are dissipated across bentonite membranes of various porosities. These data, mainly in the form of (w) values, will help resolve the kinetic conundrum of geologic membrane systems. If these data show that osmotic- pressure dissipation is extremely slow, then this should result in a re-evaluation of mechanisms causing anomalous hydrostatic pressures in the subsurface -- particularly for deep sedimentary basins.