Migration Mechanism and Accumulation Model of T of Fuyu Reservoir in Chang10 Block,Sanzhao Depression

Through the analysis fault characteristics and movement period,sedimentary microfacies,oil-water distribution rule,which derived from 5 cores,297 well loggings and 3D-seismic,the conclusion is drawn that:T2 fault has the characteristics of dense belt in plane and flower-like in profile,and oil-source faults are border faults of dense belts,controlled by inherited movement of basement faults;the Fuyu reservoir develops fluvial-dominated delta controlled Southwest Baokang provenance,and the sedimentary evolution in vertical is from dereliction to flooding,the largest dereliction stage locate base of FI group-head of F II group.The Fuyu reservoir accumulation model in Chang 10 block is that oil generated from source rocks of qn1 member in Sanzhao depression flowing backward to Fuyang reservoir through oil faults under the overpressure,and then migrated laterally to Chang 10 through advantage transform pathways(fault dense belt)formed by matching between northeast channel sand and oil faults under buoyancy,because of fault intensive belt suffer tectonic inversion with the late Mingshui group and more performance for the uplift interim graben characteristics,overall at the structural high place,and thus,oil accumulate mainly in the fault belt.