海拉尔盆地苏仁诺尔弧形断裂结构与油藏类型

Surennuoer arc fault structure and reservoir type in Hailer Basin

苏仁诺尔弧形断裂是一组具有同生性质的先张扭后压扭的断层,平面上呈苏仁诺尔断层与伴生羽状断层共同组成的帚状结构。同时,受苏仁诺尔弧形断裂的控制,在断层两侧形成了一系列构造圈闭。断层活动伴随有岩浆侵入,导致地温升高,形成CO2气藏,并改善了砂岩储层物性。同时,作为油气运移的主要通道,原油由烃源区中心向较远的收敛段运移并富集成藏。油藏类型以背斜型及断块型为主。

The Surennuoer arc fracture system includes a set of contemporaneous faults which had experienced tensional torsion then compressional torsion,displaying broom-like structure comprising Surennuoer fault and associated feather faults.A series of structural traps had formed along both sides of the Surennuoer arc fracture system.Fault movement was accompanied by magmatic intrusion,led to geotemperature rising,formed CO2 gas reservoir and improved sandstone reservoir property.Meanwhile,these faults had served as hydrocarbon migration path along which oil migrated from source center and accumulated in reservoir.The reservoir types include anticlinal reservoir and fault block reservoir.