For this, a set of observation system is set up in gas cap zone, gas-oil contact and oil zone.

并在气顶区、油气界面及油区建立了一套观察系统。

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The producing Wells have obvious effect of oil increasing, and a new enriched oil zone is formed in the water flooded reservoir.

油井见到了明显的增油降水效果，水驱后油层中形成了新的含油富集带。

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Their producing geological reserves cover 22.2% of their proved reserves and 28.8% of the producing geological reserves in Liaohe oil zone.

动用石油地质储量占辽河油区己探明原油地质储量的2 2 .2 % ，占动用地质储量的2 8.8%。

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The other process, still in use, is to cut a window in an old well's steel casing and then drill horizontally into the oil zone.

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For one thing, they dropped their demand that they should hog all the revenues from natural resources in essence, oil in their zone.

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Most analysts expect oil prices to be softer in the first quarter as the euro-zone crisis dominates the news and unseasonably warm winter weather keeps oil demand weak.

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