The hypothesis of evolutionary formation of petroleum structure is offered.

提出了石油结构进化形成的假说。

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The structural slope_break zone is favorable for the formation of petroleum accumulation.

构造坡折带是油气藏形成的极有利地带。

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Gentle slope in the dust-pan like sag has geological condition for the formation of petroleum reservoirs, and is the favorable place for the accumulation of oil and gas.

箕式凹陷缓坡带具有油气藏形成的地质条件，是油气聚集的有利场所。

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In 1960, representatives of oil-producing countries finished a meeting in Baghdad which led to the formation of the Organization of Petroleum Exporting Countries (OPEC).

CNN: Monday,