楚雄盆地油气系统演化与油气藏改造

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。

Evolution of Chuxiong Basin Oil-gas System and Transformation of Oil and Gas Reservoirs.

Transformation of oil and gas reservoir is one of the aspects for evolution of the oil-gas system. The ultimate purpose forthe study of oil-gas system evolution is to clarify transforma-tion of oil and gas reservoir Taking the central northern part ofChuxiong Basin and Yunlong Sag for example, elaboration onoil-gas system evolution and oil and gas reservoir transforma-tion is centered on five aspects - determination of generationtime for original oil and gas reservoir, division of stages fromoriginal oil and gas reservoir generation to current oil and gasreservoir transformation, hydrocarbon supplies at time of andaller oil and gas reservoir generation, hydrocarbon dispersionaller original reservoir generation and current oil and gas reser-voir storage. Effective oil and gas exploration should be target-ed at those reservoir that still keep a large quantity of oil andgas after long-term and multi-stage transformation.