Geochronology of Hydrocarbon Accumulation in Zhengjia-Wangzhuang Heavy Oil Reservoir in Jiyang Depression

The uniform temperature of reservoir enclosure is 70~160℃ in Zhengjia-Wangzhuang Oilfield of Jiyang Depression.Peak value ranges are 80~90℃ and 130~140℃.The study of hydrocarbon genesis history and burial history shows that oil filling is fast,the homogenization temperature is near the hydrocarbon genetic temperature,time of reservoir formation is consistent with that of hydrocarbon accumulating peak.The major hydrocarbon generating reservoir forming time is about 8~15Ma.The hydrocarbon may be experienced for 2 reservoir forming stages,but the peak stage is dominated in reservoir formation process.