Main controlling factors and models of tight oil accumulation in Zhaoyuan area

The study block opens up with the already found oil reservation, through comprehensive analysis to seismic, well logging, log and core data, collate stipulate system of fault, then make sure source fault; Meanwhile we use Geo-Office Jason multiply technology, launch micro faces single sand body spread research. result shows that, mostly have 4 kinds reservation: fault-lithologic, fault block, fault-screened lithologic reservoir, main target layer is Fuyu Quantou Formation 3 part, reservation mainly controlled by distance source, space which coordinated form transportation concentrated belt body, high trap. exist in internal part nearby, all feature that stays above water keeps low, formations includes becomes less from downstructure location updip; major period for hydrocarbon accumulation late Mingshui deposition; Here are modes transformation : goes downward flow backward transforms into formation, origins rocks Qingl member Sanzhao depression, under abnormal pressure formation depression affect floatage along two was linked at upstructure lithology or aligns forms trap together reservation.