由于携砂液向地层的滤失以及通过筛管缝隙的流体质量交换，水平井砾石充填过程中冲筛、井筒环空两个流动系统均为复杂的变质量流。
During the process of gravel-packing in horizontal Wells, there are the filtration flow of the carrier fluid to the formation and the exchange flow through the screen slots.
具体到渤海高渗透疏松砂岩，这些环节包括绕丝筛管、砾石充填层、射孔孔眼、压实带及近井原状地层。
For high permeability and loose sand in bohai, these links are composed of wire wrapped screen, gravel packing zone, perf, skin and near wellbore undisturbed formation.
这种完井井下工具解决方案可被用于砾石充填或挤压充填完井，也可以用于其它任何需要两次下钻才能下入的完井方式，包括优质筛管完井等。
This complete downhole tool solution can be used in gravel or frac pack applications as well as any two-trip configuration, such as standalone screen type completions.
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