In order to study the distribution pattern of hydrocarbon near the Fault F8 in the Daliuquan area,based on the study of hydrocarbon transport channels and distribution characteristics of the Fault F8 in different periods.Methods: By evaluating the associated fracture channels during the active period of the Fault F8 and the hydrocarbon transport capacity of convex ridge channels after the cessation of activity,and by combining the hydrocarbon distribution pattern near the Fault F8,the contribution of the transport capacity to the reservoir formation in different periods.Ressults:The results show that: The hydrocarbon transport capacity of the second associated fracture channel of the fault is stronger than the first associated fracture channel.The hydrocarbon transport capacity of the second associated fracture channel is enhanced from the upper sub-member,4th Member,Shahejie Formation,Paleogene (Es4) to the middle sub-member of Es3 and weakened from the middle sub-member of Es3 to the upper sub-member of Es3.The hydrocarbon transport capacity of the first associated fracture channel enhanced smaller from the upper sub-member of Es4 to the middle sub-member of Es3,while the hydrocarbon transport capacity enhanced greatly the middle sub member of Es3 to the upper sub member of Es3.Conclusions:The first and second convex ridge channel of Fault F8 has stronger hydrocarbon transport capacity than the third and fourth convex ridge channel.The first convex ridge channel has a significant decrease from the upper sub-member of Es4 to the middle sub-member of Es3,but there is little change from the middle sub-member of Es3 to the upper sub-member of Es3.The second convex ridge channel has an increase from the upper sub-member of Es4 to the middle sub-member of Es3 but is weakened from the middle sub-member of Es3 to the upper sub-member of Es3.The third and fourth convex ridge channels are gradually enhanced from the upper sub-member of Es4 to the upper sub-member of Es3.Whether on the plane or the profile,the contribution of the hydrocarbon transport capacity of the associated fracture channel during the active period of the Fault F8 to the accumulation is greater than that of the convex ridge channel after the suspension of activity.