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通过流体包裹体均一温度测试、含油气包裹体指数GOI统计和盆地模拟,研究了渤海湾盆地辽河西部凹陷南段的油气运移史,预测了油气聚集的有利地区。包裹体均一温度资料表明,本区有三期成藏:东二期、东一期和明化镇期;以前两期为主。盆地模拟研究表明,尽管沙河街组烃源岩在沙一期末开始生烃,但在东营期才开始大规模排烃和成藏。GOI的统计分析表明,GOI>5%的区域为油气聚集的有利地区,其中的圈闭应成为下步首选的钻探目标,已发现的欢喜岭油田和双南油田就分布在GOI>5%的区域内。
Based on the homogenization temperature test of fluid inclusions, the GOI statistics of oil-gas inclusions and the basin simulation, the hydrocarbon migration history in the southern segment of western Liaohe Basin in Bohai Bay Basin was studied, and the favorable areas for hydrocarbon accumulation were predicted. The homogenization temperature of the inclusions indicates that there are three stages of accumulation in this area: East Second Phase, East First Phase and Minghua Phase; the former two phases dominated. Basin modeling studies show that although source rocks in the Shahejie Formation began hydrocarbon generation at the end of the first phase of the Shahejie Formation, large-scale hydrocarbon expulsion and hydrocarbon accumulation began in Dongying. The statistical analysis of GOI shows that the area with GOI> 5% is the favorable area for oil and gas accumulation, and the traps should be the preferred drilling targets for the next step. The Huanxiling and Shuangnan fields that have been discovered are located in the areas of GOI> 5% within the area.