Abstract：Quti oilfield is characterized by crushed structure,many faults and small faulted block.The structural fracture plays an important role in oilgas accumulation.Combining with structural evaluanon of the region,the paper divided Neogene lake basin fault depression stage into three extending sub-stages,the structural attitude is different in each sub-stage of basin,forming the structural attitude of Quti horst that is characterized by "belts in east-west direction and blocks in north-south direction".The oil-gas abundant grade of the region depends on lateral sealing characteristics of faults.It is considered by the analysis of multi-factors having influence on lateral sealing characteristics that Ⅱ,Ⅲ and even Ⅳ grade of fault in Quti oilfield generally have better sealing characteristics;inner side of arc fault or developed segment of zigzag fault has better sealing characteristics than that of smooth and straight segment of fault;the shift fault having near S-N orientation generally has better sealing characteristics.Around above mentioned faults,there are a lot of oil-bearing formation and high oil column on profiles and large oil-bearing area and high abundance on map;on the contrary,the faults of E-S orientation formed in Paleogene depositional stage generally have poorer sealing characteristics.
隋淑玲, 赵开连. 断裂构造在油气成藏中的作用——以济阳拗陷曲堤油田为例[J]. 石油地球物理勘探, 2003, 38(6): 666-670.
Sui Shuling. Role of faulted structure in oil-gas accumulation:case of Quti oilfield,Jiyang depression. OGP, 2003, 38(6): 666-670.
