盆1井西凹陷三工河组构造沉积特征及油气成藏认识

Basin 1 well west sunken Sangonghe FM construction sedimentary characteristics and petroleum entrapment cognition

分析准噶尔盆地盆1井西凹陷侏罗系构造、沉积等地质特征,结合实钻资料,进而明确成藏规律及成藏模式。研究区内断裂发育,主要包括油源断层及侏罗系层间小断层,三工河组二段沉积相为三角洲前缘亚相,砂体厚度大、平面分布广,连通性好。层内断层切割砂体,充注油气后形成断块油藏。工区部分区域油气成藏后,发生构造反转,调整前或者调整后的有利构造位置都有利与成藏。

Analyzed the Jurassic system construction,deposition and other geologic features of Junggar Basin basin 1 well west,combined the practical drilling data,and then clear-cut the reservoir-forming regularity and reservoir-forming pattern.The research area fault-developed,mainly included oil sources fault and Jurassic interlayer small fault,the second section sedimentary facies of Sangonghe FM was delta front subfacies,sand body thickness was big,horizontal distribution was wide and had good connectivity.The faults cut the sand body in layers,formed the fault block oil reservoir after filling the oil and gas.Partial regions of the work zone had structural inversion after petroleum entrapment,the favorable structural locations before or after adjustment all were conducive to the accumulation.