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油气藏改造是油气系统演化的一个方面,弄清油气藏改造是油气系统演化研究的最终目的。以楚雄盆地中北部地区及云龙凹陷为例,从原生油气藏形成时间的确定、原生油气藏形成之后至今油气藏改造阶段的划分、原生油气藏形成时的烃供给及其之后的烃补给、原生油气藏形成后烃类散失、现今油气藏赋存状态等五个方面,对油气系统演化与油气藏改造进行了论述。经历长时间多期改造后仍保存有大量油气的油气藏才是油气勘探有效目标。
Reformation of oil and gas reservoirs is one aspect of the evolution of oil and gas systems. It is clear that the reform of oil and gas reservoirs is the ultimate goal of the evolution of oil and gas systems. Taking the middle and northern part of the Chuxiong Basin and the Yunlong Sag as an example, this paper analyzes the time of formation of primary oil-gas pools, the division of oil-gas reservoirs since the formation of primary oil-gas reservoirs, the hydrocarbon supply during the formation of primary oil-gas pools and the subsequent hydrocarbon recharge, Hydrocarbon depletion after the formation of oil and gas reservoirs, and the present state of oil and gas reservoirs. The evolution of oil and gas systems and the reformation of oil and gas reservoirs are discussed. It is the effective target of oil and gas exploration that a large number of oil and gas reservoirs are still preserved after a long period of transformation.