【摘要】 利用高分辨率三维地震剖面、地表露头以及钻井数据分析了西昆仑山前克里阳—甫沙构造带东段柯东构造的特征,认为柯东构造为压扭构造,主要发育基底断层,表现为强烈变形的褶皱前翼和宽缓的后翼(顶部)。生长地层揭示克里阳—甫沙断层于上新世逆冲形成柯东单斜(鼻隆),具有卷入翼部旋转的变形机制;后期克里阳—甫沙断层发育突破断层将柯东单斜切割为断块,并导致地表出露一套高陡倒转的地层,这套地层卷入了侏罗系—新生界。柯东构造的深部断块构造变形较弱,使得油气藏得以保存,KD1井显示这类断块具有很好的勘探潜力。更多还原

【Abstract】 Used high-resolution seismic data and combined with outcrop and drilling data,we analyzed structural characteristics of Kedong structure(the east segment of Keliyang-Fusha fault belt) in the piedmont of western Kunlun mountain,which,as a transpression structure,consists of mainly basement faults and shows a gently dipping backlimb(crest) and intensely-deformed forelimb.Growth strata reveal that Keliyang-Fusha faults formed a monocline(nose) structure by thrust in Pliocene with the deformation of limb rotation,that is to say the Kedong structure is a basement-involved structure.Later Keliyang-Fusha faults broke through the Kedong monocline and cut it into fault blocks,resulting in a suite of steeply-reversed strata exposed to the surface,which contained Jurassic-Cenozoic beds.Because deep fault blocks didn’t suffer intense deformation,they formed good traps for hydrocarbon accumulation.Drilling data of Well KD-1 indicated that such blocks are of good exploration potential.更多还原