COMPARISON OF POROSITY‐DEPTH RELATIONSHIPS OF SHALE AND SANDSTONE*
COMPARISON OF POROSITY‐DEPTH RELATIONSHIPS OF SHALE AND SANDSTONE*
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DOI：
10.1111/j.1747-5457.1980.tb00981.x
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发表时间：
1980-10
影响因子：
1.8
通讯作者：
K. Magara
中科院分区：
文献类型：
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作者：
K. Magara
页岩压实或孔隙度减小的速度随着埋藏或压实作用的增加而减小。这可能是由于泥岩渗透率降低，水的粘度增加，从而使排液速率随着压实度的增加而降低。对于给定的覆岩压力增加，施加于给定颗粒接触区域的压力或应力随着埋藏而减小，因为接触区域随着压实和伴随的颗粒变形而增大。这也可能导致压实率随埋深的增加而降低。上述观察结果可能表明，页岩压实作用主要受沉积岩的物理作用力控制。
The rate of shale compaction or porosity reduction decreases with increase in burial or compaction. This may be caused by decreasing shale permeability and increasing water viscosity, thus decreasing rate of fluid expulsion with increasing compaction. For a given increase in overburden pressure, the pressure or stress applied to a given grain-to-grain contact area decreases with burial because the contact area increases with compaction and concomitant grain deformation. This may also cause the reduced rate of compaction with increase in burial. The above observations may suggest that the shale compaction is primarily controlled by physical forces of sedimentary rocks.