Therefore it is very important to estimate production layer, determine planar distribution of press and residual oil, and investigate its characteristics.

因此对产层进行评价，确定地层压力和剩余油等参数的平面分布，由此研究其特点具有十分重要的意义。

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Carboniferous system is the main production layer of East Sichuan and reserves, especially volumetric method reserves is the base of developing production plan .

石炭系是川东地区的主力产层，储量、特别是容积法储量是制定开发方案的基础。

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Fracture will extend around perpendicular direction during hydraulic fracturing. The effect of hydraulic fracturing will be influenced when the fracture exceed production layer and enter interlayer.

在水力压裂过程中，裂缝会沿着垂直方向上延伸，当裂缝超出生产层而进入隔层时会影响水力压裂效果。

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The Montreal Protocol is the international agreement designed to protect the ozone layer by phasing out production of Cfc's and halons.

BBC: News | Sci/Tech | Ozone hole reaches record size

But if doctors can preserve remaining insulin production in their new patients, they might someday be able to layer on other drugs that would prod the insulin-producing cells to slowly regenerate.

FORBES: Magazine Article