In order to understand the control of faults on hydrocarbon accumulation in the Paleogene Shahejie Fm（ Es3（ 1）） in Qijia-Yuanyanggou area

the Liaohe Depression

source rock-rooted faults were identified on the basis of fault system division. In addition

the SGR method and fault growth rate were applied respectively to quantitatively evaluate the lateral sealing capacity of fault traps and the fault activity intensity after hydrocarbon accumulation period. The results show that the control of faults on hydrocarbon accumulation is depicted mainly in the following three aspects. Firstly

the oil sourcerooted faults control the locations of hydrocarbon accumulation; secondly

the lateral sealing capacity of faults controls fullness of the fault traps; and thirdly

the fault activity intensity after hydrocarbon accumulation period controls the preservation of pre-existing oil and gas. Based on the above studies

criteria for selection of favorable targets were established. When oil sources are sufficient and reservoir physical properties are good

class-Ⅰ trap is defined as fault traps under the control of two or more source rock-rooted faults

having a hydrocarbon fullness greater than 50% and fault activity intensity（ after hydrocarbon accumulation period） less than 2m / Ma. Drilling risk of class-Ⅰ is minimum

followed by class-Ⅱ and class-Ⅲ traps. Finally

two class-Ⅰ traps and one class-Ⅱ trap were mapped

and the oil-bearing area of Es3（ 1）in these traps is 5. 8 km2