【摘要】 确定油气运移时期和路径是分析油气成藏的关键。通过流体包裹体均一温度的测试、盆地模拟和含油气包裹体指数GOI统计法,研究了辽河西部凹陷南段的油气运移时空展布特征和成藏动力学过程。研究表明,该地区的成藏期有3期,分别为东二期、东一期和明化镇期,其中以前两期为主。盆地模拟结果进一步表明,尽管沙河街组烃源岩在沙一期末开始生油,但在东营期才开始大规模排烃和成藏。GOI的统计和分析表明,GOI>5%的高值区为油气聚集的有利地区,已发现的欢喜岭油田和双南油田即分布在GOI>5%的区域内。利用流体包裹体信息结合盆地模拟能更精确地反映出油气运移的时空展布。更多还原

【Abstract】 Defining the hydrocarbon migration period and the path is a key to the analysis of oil and gas reservoir.The time and space distribution characteristics of hydrocarbon migration and the accumulation kinetics of the western slope of Yuanyanggou sub-sag are determined,through homogenization temperatures of fluid inclusions,simulation and paleo-geothermal history and petroleum inclusions particles index GOI statistics.The results show that the Hydrocarbon migration times of the western slope of the Yuanyanggou sub-sag are Ed2,Ed1 and Nm,of which the Ed2 and Ed1 are two main stages.A basin modeling study further shows that the Shahejie Group began to produce oil at the end of Es1,but large-scale oil and gas expulsion and accumulation started during the Ed period.The statistical and analysis indicate that the high-value areas of GOI(GOI>5%) is favorable areas for hydrocarbon accumulation,and Huanxiling and Shuangnan oilfields are in the GOI>5% region.A perfect time and space distribution characteristics of hydrocarbon migration may be determined by the information from enclosure and basin modelling.更多还原