Compared with the normally trapped gas, the accumulation of typical deep basin gas is dominantly controlled by the capillary pressure and burying depth of tight sands.

与受浮力作用影响(与气柱高度有关)的典型常规气藏相比，典型深盆气成藏与埋藏深度有关。

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There are two typical kinds of mechanisms and models for gas migration, accumulation and preservation, including deep basin or basin centered gas accumulations and generally trapped gas accumulations.

游离相天然气在从运移到聚集和保存的过程中，通常存在着深盆气藏和常规圈闭气藏两种机理模式。

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When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.

当井和一个水池相接时，油通常会从井里上升，因为它与井下的水的密度不同，或者因为停留在它上方的膨胀气体的压力。

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Companies are developing gas supplies trapped in shale rock two to three thousand meters underground.

VOA: special.2009.10.23

Those fissures and crevices that have trapped natural gas below the Earth's surface are also capable of trapping helium, although typically in small amounts.

CNN: U.S. needs a strategy on helium

About 25, 000 wells a year are being fracked, a process in which water, chemicals and sand are injected at high pressure underground to release trapped natural gas.

NPR: Report: Flaws In EPA Drilling Pollution Data

In February, an exploration company said using this method to free trapped natural gas in County Fermanagh could supply all the gas Northern Ireland would need for decades.

BBC: Enterprise Committee