准噶尔盆地西北缘超剥带油气运聚特征与成藏模式

准噶尔盆地西北缘超剥带地层超覆剥蚀频繁，远离油源，油气运聚过程复杂。结合地质研究、测试分析、盆地模拟认识，剖析了油气成藏要素及其时空匹配关系，揭示出准噶尔盆地西北缘超剥带具有“三源供烃、三期充注、断层-毯砂-淋滤层输导、毯砂边缘-壳下聚集”的成藏特征。超剥带主要有“断层-毯砂”、“断层-淋滤层”、“ 淋滤层-毯砂”等3种油气输导样式。准噶尔盆地西北缘超剥带总体具有“远源供烃，断层-毯砂-淋滤层输导、输导效能主控成藏与富集”的成藏模式。

Hydrocarbon MigrationAccumulation Characteristics and PoolForming Patterns in OverlapErosion Zones in Northwestern Margin of Junggar Basin

The overlap and erosion zones in northwestern margin of Junggar basin are characterized by frequent overlaps and erosions, far away from the hydrocarbon sources, and complex oil?gas migration and accumulation. Combining with geologic study, test analysis and basin modeling recognition, this paper analyzes the key factors of hydrocarbon accumulation and their matching relationships, and reveals that the overlap and erosion zones in this area have such pool?forming characteristics as charging by three sources and stages, transporting by faults?blanket sands?leached layers, and oil?gas accumulating by blanket sands margin?beneath weathering crust; the petroleum transporting styles include fault?blanket sand, fault?leached layer, and leached layer?blanket sand; and such hydrocarbon accumulation patterns as remote sources for hydrocarbon charging, fault?blanket sand?leached layer for oil?gas transportation, and the effect of transporting efficiency on controlling hydrocarbon accumulation and enrichment