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本文探讨了国内外深部地壳构造与某些大油气田的关系,得出上地幔隆起区与中新生代油气田区相对应的结论,并讨论了其机制问题。认为上地幔隆起所产生的张应力可以形成大断层(特别是产生一系列正断层),因而形成坳陷盆地或“地洼盆地”,并有较厚的沉积物。其中的有机物质在合适的温度、压力、化学及构造条件下,可以形成石油和天然气。因此,可以根据:(1)有大的莫霍界面隆起区;(2)有巨厚的分布范围广的沉积层;(3)有宜于生油的温度、压力、化学条件及合适的储油构造来预测油田远景区.文中给出了预测实例。
This paper discusses the relationship between the deep crustal structure and some large oil and gas fields at home and abroad, and draws the conclusion that the upper mantle uplift corresponds to the Mesozoic and Cenozoic oil and gas fields, and discusses its mechanism. It is thought that the tensile stress generated by the uplift of the upper mantle can form large faults (especially a series of normal faults), thus forming the depression basin or “diwak basin” with thick sediments. The organic materials can form petroleum and natural gas under suitable temperature, pressure, chemical and structural conditions. Thus, it is possible to: (1) have a large Moho interplanar uplift; (2) have a very thick deposit of a wide range of distribution; (3) have suitable temperature, pressure, chemical conditions and suitable storage Oil structure to predict the prospect of the oilfield.