It is an important aspect in cause of petroleum formation that hydrocarbon from fatty acid or ester decarboxylation catalyzed by minerals at low temperature.

矿物低温催化脂肪酸或酯的脱羧生烃是石油成因机制的一个重要方面。

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Nevertheless, the main objective in producing chemicals from petroleum is the formation of a variety of well-defined chemical compounds that are the basis of the petrochemical industry.

不过，从石油生产化学制品的主要目的在于，生产出大量具有明确界定的化合物，以奠定石化工业的基础。

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Migration can be local or can occur along distances of hundreds of kilometers in large sedimentary basins, and is critical to the formation of a viable petroleum system.

运移可以是局部的，但在一个大型沉积盆地内，运移可以达到几百公里，这对于有活力的石油系统的形成是关键性的。

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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,