【摘要】 结合岩屑录井、岩心及地震资料,对南贝尔凹陷主控断裂特征进行综合分析,系统研究了其在油气成藏过程中的控制作用。认为主控断裂在断陷期近南北向拉张应力作用下对地区的构造格局形成起到了分割作用,结构总体表现为"二洼槽,一转换带、一潜山披覆带";在左旋运动及扭压反转作用下,派生出的次级断层控制构造圈闭的形成,断陷末期,主控断裂活动减弱,该格局对地区的沉积相带、储集层条件及烃源岩的分布造成很大影响,进而控制了南贝尔凹陷的油气分布。结合完钻井的试油生产数据,提出今后该地区的油气勘探方向。更多还原

【Abstract】 This paper studies the characteristics and control action of the master fracture in the process of hydrocarbon accumulation in south Beier depression by analyzing sieve residue log,cores and seismic data.It is believed that the main fracture had segmented the tectonic pattern in faulting period under near NS tensile stress action,generally presenting " two sags,one transition zone and one buried hill drape";the secondary faults derived from sinistral movement and transpression-inversion action had controlled the formation of structural traps;in late faulting period,the movement of the master fracture weakened;such a pattern had significant impacts on regional sedimentary facies,reservoir conditions and source rock distribution,thus controlled oil and gas distribution in south Beier depression.Exploration targets are proposed for this region in conjunction with oil testing data.更多还原