简答题 翻译：The separation between the various reservoirs is demonstrated in each case by different oil/water and gas/oil contacts in most reservoirs.

问答题翻译：Traps of this type were formed after the deposition of the reservoir rock by erosion and or alteration of a portion of the reservoir rock through solution or chemical replacement.

问答题翻译：The casing and tubing used to bring crude oil to the surface is suspended underneath a wellhead or Christmas tree.

问答题翻译：Other instruments used in gravity work are the torsion balance and the pendulum.These instruments, however, have been practically replaced by the gravimeter.

问答题翻译：The permeability of a porous medium may be determined from samples extracted from the formation or by in-place testing.

问答题翻译：The main function of a rotary rig is to drill a hole, or as it is known in the industry, to make hole.