长春岭沿江地区扶余油层成藏主控因素分析

长春岭沿江地区扶余油层油气成藏条件研究和典型油气藏分析表明,研究区内青山口组烃源岩成熟度低、生烃能力较差;研究区的油气成藏规模受外部油气运移数量的控制。研究区油气主要来源于其西北的三肇凹陷青山口组烃源岩;不规则零散分布的河流相砂体、断层对砂体的强烈分割作用以及多期多成因油气对圈闭的充注作用是造成研究区油气分布复杂现象的主要原因。研究区存在"源岩区高压倒灌—侧向断裂疏导—构造高部位聚集"的成藏模式。研究区油气生成、运移与圈闭的形成期在时空上形成了良好有机的配置关系;其中明水组末期是研究区油气成藏事件的关键时刻。密集断裂带及油源补给程度是研究区油气成藏的主控因素。

Analysis of main controlling factors on hydrocarbon accumulation of Fuyu oil reservoir in Changchunling Area

Changchun Ridge along the Fuyu reservoir hydrocarbon accumulation conditions and the typical oil and gas reservoir analysis showed that the study area Qingshankou source rocks maturity is low , less capable of hydrocarbon generation, hydrocarbon accumulation scale of the study area by the external number of hydrocarbon migration the control. In the study area oil and gas comes mainly from the northwest Sanzhao Depression Qingshankou source rocks ; irregular framented distribution of fluvial sand bodies of strong segmentation fault on the sand body, and the polygenetic hydrocarbon trops filling the role of the main reason for the complex phenomenon of hydrocarbon distribution in the study area. The study region of the source rocks of high-pressure intrusion-lateral fracture divert-structural highs gathered the accumulation model. Hydrocarbon generation, migration and trap formation form a good organic configuration in space and time; the end of which water group is a hydrocarbon accumulation in the critical moment of the event in the study area. Intensive fault zone and the source of oil supply level is the main controlling factors in the study area hydrocarbon accumulation.