Research On The Rule Of Hydrocarbon Accumulation In Yan10 Oil Reservoir In The XiQu Oilfield

This paper made in-depth researeh of Yan10 oil-layer distribution characteristics and Control factors in XiQu oilfield,with Yan10 oil-layer in XiQu oilfield as object,with multidiseiplinary geologieal theory and technology for guidanee,made full use of drilling,well logging and logging display,etc.,Combined with the multi-factor composite analysis?Through to the objective interval fine stratigraphic classification and correlation,summarizes the formation characteristics,To push Yan10 oil-layer is divided into 101 and 102 subgroups two small layers;Find out the top of the small layer structure and microfacies distribution characteristic;Through Impression method to restore the ancient landform area;Sums up the study area Yan10 oil-layer lithology,physical property and other characteristics.The results show that,The overall development of small nose structure in Yan10 oil-layer and belongs to the braided fluvial facies.Two sedimentary microfacies research as Channel sand dam and river flood swamp development in the area.Reservoir physical property is good,strong heterogeneity.The study area belongs to the hole in the low permeability reservoir.Lithologic reservoirs are mainly reservoir type.In the plane,Yan10 reservoir is mainly distributed in the north in the study area.On the longitudinal,Oil and gas are mainly distributed in 101 small layers.Through the study,XiQu oilfield Yan10 reservoir oil and gas enrichment regularity mainly by the ancient landform and top of the reservoir structure control,The second is affected by sedimentary microfacies,And reservoir property on its oil and gas enrichment regularity is very small.The sedimentary microfacies distribution controls the distribution of the reservoir;paleotopography Controls of the ancient river channel sand body distribution,and provides oil and gas migration channel;Nose long low amplitude structure speeds the vertical differentiation of oil-water and space redistribution,and makes the oil and gas enrichment,then formation Yan10 reservoir distribution pattern at present.