辽河拗陷断层的选择性反转特征

辽河拗陷反转断层发育，表现形式多样，有下正上逆反转断层、断面倒转逆断层、具有花状构造特征的反转断层等。辽河拗陷的反转断层分布于次级构造单元的东部凹陷、西部凹陷和大民屯凹陷内，绝大多数发生于控制断陷沉积的北东向或北北东向的主干断层部位。在控制断陷发育的同一断裂系中，仅有部分断层发生反转，对于同一条断层，仅在某一区段发生了反转。在拗陷内形成了正、逆断裂并存，同一条断裂有正有逆的复杂组合特征。辽河拗陷的反转断层多属于局部反转，有利于油气聚集。

Selective-inverted characters of faults in Liaohe Depression.

The developed inverted faults in Liaohe Depression have various form of expression,such as the lower-normal and upper-reverted fault,the reverse fault with inverted fault plane and inverted fault with flower-structural character.The inverted faults of Liaohe Depression are distributed in the east faulted depression,west faulted depression and Damintun faulted depression of second structural unit.Most of them are born in main fault parts having NE and NNE directions that controlled the deposition of faulted depression.Only some of faults were inverted in the same fault system controlling the development of faulted depression and only some segments were inverted in same fault.The characters of coexistence of normal and thrust faults in depression and combination of normal segment and reverse segment in same fault are formed.The inverted faults in Liaohe Depression belongs local inversion,being of benefit to oil/gas accumulation.