塔里木盆地轮南地区轮南2井油藏的注入史研究--来自流体包裹体的证据

轮南 2井为轮南潜山构造 2号高点上的一口高产油气井 ,主要产层为三叠系 ,其次为侏罗系。通过对轮南 2井油藏中流体包裹体分布特征和成分研究 ,结合轮南地区构造演化史 ,埋藏史和生烃史分析 ,明确了塔里木盆地轮南 2井三叠系油藏主要为一次油气大规模注入形成 ,油气注入时间主要在 14～ 16 Ma左右 ,油源来自于中晚奥陶纪烃源岩。侏罗系油藏则具有两次的油气注入 ,第一次的油气注入主要发生在 14～ 16 Ma左右 ,油源来自于中晚奥陶统烃源岩 ,油气沿断层垂向运移为主 ;第二期油气注入主要发生在晚喜山期 (晚第三纪早期 )之后的最近的 5 Ma间 ,主要为沿重新开启的断层向上运移、注入 ,进行油气再次分配和调整 ,可能还混有少量的陆相油注入

Study on discharge history of well LN2 in Lunnan area, Tarim basin: the evidence from fluid inclusion

Lunnan oil field occupies 78% of proved reserves in the Lunnan area. The drill hole LN2 is the first preliminary exploratory well on high location of the NO.2 structure belt in Lunnan bury hill. It also is the important industrial oil flow well. The main producing formation is Triassic reservoir. There are three oil groups: T I, T II and T III oil groups. The later is a Jurassic reservoir.The distribution of organic inclusion is observed by optics and fluorescence microscope. Composition of organic inclusion is obtained by GC and GC MS. On the base of structure evolution, burial history, hydrocarbon generation and study on organic inclusion, we confirm that Triassic oil pool has only one large scale discharge. Petroleum displacement is main vertical migration. Its time is 14~16Ma and oil comes from Ordovician hydrocarbon source rocks. Jurassic oil pool have two discharge stages. The early one is in 14~16Ma. It has the same source rocks as Triassic oil pool. The later one took place about 5Ma ago. It is redischarge along flauts being opened again.