The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.

主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。

youdao

For thin multilayer reservoirs with low permeability, it is expected to conduct fracturing in all pay zones at one time to reduce the frequency of fracturing operation.

对于低渗复杂的薄层多层油气藏，期望一次性压开所有产层以减少压裂作业的次数。

youdao

However, most of undeveloped new blocks are low-grade reservoirs with many development difficulties such as super heavy oil, low permeability, thin bed and deep pay.

而尚未开发的新区大多属于超稠油、低渗、薄层或深层等开采难度较大的低品位油藏。

youdao