The people at the gas stations where I asked for a gas can told me that they couldn't lend them out "for safety reasons," but that I could buy a really crappy one-gallon can, with no cap, for $15.
Gas may be found either dissolved in reservoir fluids or as free gas that tends to form a gascap beneath the top seal on the reservoir trap.
气体可能在储层流体中以溶解形式或作为游离气而存在，游离气趋于在储层圈闭的盖层下面形成气顶。
3
With further understanding of gascap reservoir recovery mechanism and the progress in technology, obstruction recovery method has become an important method for developing gascap field.