Both oil and gas are less dense than water, so they generally tend to rise upward through water-saturated rock and sediment.

石油和天然气的密度都比水小，所以二者通常会浮在被水浸泡的岩石和沉积物的表层。

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A method and device for separation of a fluid, in particular oil, gas and water.

分离一种流体，尤其是分离油，气体和水用的一种方法和装置。

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In this paper, a theory and instrument for measuring three-phase saturations of oil, gas and water system in cores by microwave attenuation technique were discussed.

本文论述了微波衰减法测定圆柱状岩芯油、气、水三相饱和度的理论及其仪器构成。

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At the other end of the spectrum, two-thirds of the companies in food processing, government services, farming or agriculture, health care and education, and half of the companies in chemical processing or manufacturing, construction, the oil industry, power, gas and water utilities, and the legal industry are expected to have one major mission-critical failure owing to year-2000 problems.

CNN: Gartner's year-2000 survey finds widespread disruptions likely

Until recently, oil and gas produced from deep-water fields have been brought to the surface and transported to onshore processing facilities.

FORBES: World's First Subsea Smart Grid Changes Offshore Oil and Gas Game

Even in areas with no nearby oil and gas drilling, the water quality in some aquifers changes naturally, groundwater experts say.

NPR: Cause Of Off-Color, Fetid Water Eludes Pa. Town