孤岛油田原油粘度大，联合站一次、二次沉降罐的原油在冬季经常起泡。
Crude oil in primary and secondary gun barrels at central gathering station always foams in winter for high viscosity of the crude oil in Gudao oilfield.
结果表明，孙虎地区存在持续沉降型、早期沉降型和二次沉降型三种生排烃类型。
The results showed that there are three generation and expulsion styles in Sunhu: persistent subsidence style, forepart subsidence style and secondary subsidence style.
古生界烃源岩在新生代盆地沉降期间“二次生烃”，生成的天然气通过断裂向上运移至第三系储集。
In the subsidence period of the Cenozoic basin, the hydrocarbons generated secondarily by Palaeozoic source rocks migrated upward and passed through fault to Tertiary reservoir.
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