不同构造带存在不同的油气成藏期次，因而油气分布在平面上及垂向上存在不均一性。
There are different pool-forming stages for different structural zones, resulting in the heterogeneity of oil-and-gas distribution both laterally and vertically.
渤海湾盆地埕岛油田油气成因与成藏较复杂，对成藏期次与时间一直存在疑问。
The Chengdao oilfield of the Bohaiwan Basin is characterised by complicated petroleum infilling history.
吉木萨尔凹陷东斜坡梧桐沟组原油至少存在两期油气成藏。
For crude oil from Wutonggou Formation in the slope, there are at least t...
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