The recognition and evaluation of low resistivity oil layer is worldwide problem.

低阻油层的识别、评价与熟悉是世界性的困难。

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High formation water salinity reduces resistivity contrast between oil layer and water layer.

高矿化度的地层水，降低了油层与水层的电阻率对比度。

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The model consists of perforation, wellbore, cement casing, oil layer, micro-annulus and transverse fracture.

模型中包括射孔孔眼、套管、水泥环、油层、微环隙和横向裂缝。

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However,brown rice does not last as long as white rice because of the oil-rich layer of bran.

VOA: special.2010.06.30

Because of the oil-rich bran layer, it spoils quickly if not refrigerated or stored in vacuum-sealed bags.

VOA: standard.2010.06.25

Zhong Yu of Greenpeace told the BBC's Chinese service there was a heavy layer of oil covering the coastline.

BBC: China oil spill after pipe blast 'worse than thought'

The tube, coated with heat-trapping layers of ceramics and metals, cooks a surrounding layer of oil to 750 degrees Fahrenheit.

FORBES: Light And Heat

Plank's son Roger, 42, who serves as chief financial officer, keeps a reminder of those days on his desk: a small vial of foul-looking water with a thin layer of crude oil on the top.

FORBES: Dry powder