准噶尔盆地南缘褶皱冲断带断裂输导石油效率评价

为了评价准噶尔盆地南缘褶皱冲断带断裂输导原油效率,通过定义断裂输导系数和分析原油成藏过程有效性,建立了断裂输导石油效率评价方法。评价结果表明,断裂输导系数沿着褶皱冲断带呈带状分布,高效断裂输导区主要位于托斯台背斜、独山子背斜、安集海背斜、霍尔果斯背斜及其以南、吐谷鲁背斜、清水河断鼻和齐古背斜等地区。高效断裂输导区内,第一排构造带断裂输导效率最高,第二排构造带次之,第三排构造带相对最低。研究区独山子油田、霍尔果斯油田、吐谷鲁油田、齐古油田等均分布在高效断裂输导范围内,表明高效断裂输导是准南褶皱冲断带原油成藏的重要条件之一。

Evaluation on Crude Oil Transporting Efficiency Though Fault at the Fold-Thrust Belt in Southern Margin of Junggar Basin

To evaluate crude oil transporting efficiency through fault at the fold-thrust belt in sou-thern margin of Junggar Basin,an evaluating method on crude oil transporting efficiency through fault is established by defining fault transporting coefficient and analyzing effectiveness of crude oil accumulating process.Evaluating consequence indicates that fault transporting coefficient are banding distribution along the fold-thrust belt,and fault transporting districts with high efficiency are major Tuositai anticline,Dushanzi anticline,Anjihai anticline,Huoerguosi anticline and it's southern areas,Tugulu anticline,Qingshuihe fault nose and Qigu anticline.In the fault transporting districts with high efficiency,the fault transporting efficiency is greatest at the first structural belt,and is secondary at the second structural belt,and is least at the third structural belt.The Dushanzi oilfield,Huoerguosi oilfield,Tugulu oilfield,Qigu oilfield and so on,are all located in the fault transporting districts with high efficiency,which indicates fault transporting with high efficiency is one of the significant condition of crude oil accumulation at the fold-thrust belt in southern margin of Junggar Basin.