Unconsolidated sand reservoir always be buried not deep, because of it's low cementation and high content of clay and sundry, the unconsolidated rock is easy to sanding during exploitation.

疏松砂岩气藏由于埋藏较浅、岩石胶结性差，并且粘土和杂基含量高，使得这类气藏在开采过程中容易出砂。

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Ramp exploitation is easy to trackless equipment moving, it has played important role in the first phase of the project. It will play much more important role in the deep project.

斜坡道开拓便于无轨设备通行，在一期工程生产中发挥了很大的作用，在深部工程生产中将发挥更大的作用。

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