东营凹陷青西地区断裂特征及其控油气作用

以研究区地质、地球物理资料为基础,通过油源断层厘定、关键时期断层活动性分析及封闭性计算,探讨了东营凹陷青西地区断裂特征及其对油气的控制作用。结果表明,研究区主要发育EW向、SN向与NW—SE向3组断裂,不同断裂体系相互切割,形成了研究区复杂断块型圈闭。研究区主要发育7条油源断裂,均为近EW向断裂;油源断裂控制了平面上油气的宏观分布,其中①,④,⑤号断裂控制辛镇构造的油气分布,⑤,⑥,⑦号断裂为永安镇构造输导油气,新立村地区油气主要依靠②,③,⑤号断裂输导;纵向上,断层的封闭能力控制了油气的差异富集,油气主要富集于砂泥对接同时断裂泥比率SGR大于40%的部位。

Fault characteristics and controlling factors of hydrocarbon accumulation in Qingxi Area of Dongying Depression

Based on the data of geology and geophysics,through the discussion of the oil-migrating fault distribution,fault activity and fault sealing,the fault characteristics and the controlling factors of the hydrocarbon accumulatiom in Qingxi Area of Dongying Depression have been studied.The results show that three group faults,EW-trending,SN-trending and NW-trending,are developed in the study area.These faults of different trending cut each other aad formed the complex fault-block traps.The 7 oil-migrating faults existing in the study area are all EW-trending.The oil-migrating faults control the distribution of the hydrocarbon in plane.The oil-migrating faults of number 1,4,5 control the distribution of the hydrocarbon in Xinzhen Structure,and the oil-migrating faults of number 5,6,7 and number 2,3,5 conduct hydrocarbon for Yong'anzhen Structure and Xinlicun Structure respectively.The fault sealing controls the distribution of the hydroearbon in vertical and the hvdrocarbou are mainly accumulated in the area with sandstoue-shale juxtaposition and the SGR＞ 40％.