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分析准噶尔盆地的热史、烃源岩热演化史、圈闭的形成史和油气的早期充注对储集层演化的影响 ,指出盆地腹部深层具有形成大型油气田的有利条件。准噶尔盆地古地温较高 ,使下二叠统烃源岩在三叠纪末大部分达到生烃高峰 ,而盆地腹部的深层圈闭在三叠纪末期或更早就已基本定型 ,与生烃史有很好的配置关系 ,因此深层油气在三叠纪末期以前就可聚集成藏 ;油气的早期充注可抑制孔隙的演化 ,由于深层具有早期成藏的特点 ,推测储集层物性应该较好。探讨了深层的油气成藏特征 ,包括油气特征、超高压和成藏模式等。图 5参 11(杨永泰摘 )
This paper analyzes the thermal history of Junggar Basin, the thermal evolution history of hydrocarbon source rocks, the formation history of traps and the effect of early filling of oil and gas on reservoir evolution. It is pointed out that favorable conditions for forming large oil and gas fields in the deep belly of the basin are pointed out. The ancient geothermal temperature in the Junggar Basin is relatively high, leading to the peak of hydrocarbon generation in most of the Lower Permian hydrocarbon source rocks at the end of Triassic. The deep traps in the belly of the basin have been basically settled at the end of Triassic or earlier, Therefore, the deep oil and gas could accumulate and accumulate before the end of Triassic. The early filling of oil and gas can restrain the evolution of the pores. Because of the characteristics of the early accumulation of the deep layer, it is supposed that the physical properties of the reservoir should be more it is good. The deep hydrocarbon accumulation characteristics are discussed, including the characteristics of oil and gas, ultra-high pressure and reservoir forming patterns. Figure 5 Senate 11 (Yang Yongtai pick)