Sedimentary characteristics and oil-bearing feature of nearshore subaqueous fan at Maxi area,Raoyang depression

Study on nearshore subaqueous fan at Maxi area of Raoyang depression is based on a comprehensive study of seismic data,well logging data,lithologic data and the evolvement process of tectonic movement in Raoyang sag.It can be classified into three subfacies:proximal fan,middle fan and distal fan,and several microfacies.Several factors control the formation and distribution.The primary factor is the movement of contemporary fault which brings about steep landform and its episode movements make up of the burst mechanics. Meanwhile,the climate and the provenance factor can also affect its emergence.The base level affects the features of facies orders.At the area,the mainly facies orders is the fining-upward cycle.According to the characteristics, the development model is established at Maxi area. Through the analysis of oil-bearing,the physical property of middle fan channel is more favorable.The future exploration direction of maxi area is proposed.