滨里海盆地南部隆起带盐下成藏条件与主控因素分析

Hydrocarbon accumulation condition and main controlling factors of sub-salt strata in southern uplift of Pre-Caspian basin

滨里海盆地是中亚地区油气资源最丰富的盆地之一,盐下碳酸盐岩为主力油气层,具有巨大的勘探潜力。通过对滨里海盆地南部隆起带的油气成藏条件和主控因素进行综合分析,认为南部隆起带烃源条件好,油源充足,良好的圈–源匹配关系是油气聚集成藏的基础,区域隆升的构造背景决定油气运移优势指向区,石炭系礁滩相及碳酸盐岩储层发育情况控制着油气的富集程度,源岩断层和淋滤改造后的不整合面形成了有效的油气运移通道。

Pre–Caspian basin is one of the most abundant basins with abundant oil and gas resources in the central Asia. The pre–salt carbonate is the main reservoir in the area, which has a huge hydrocarbon exploration potential. Through comprehensive analysis of hydrocarbon accumulation conditions and main controlling factors, the source rock conditions in the southern uplift are good, which has a good circle–source matching relationship and it is the foundation of the hydrocarbon accumulation. The regional uplift tectonic setting determines the advantage of hydrocarbon migration, the carboniferous reef facies and carbonate reservoir development control the hydrocarbon enrichment degree, source rock fault and unconformity surface formed in modified leaching effective hydrocarbon migration channel.