Research Oil Reservoir Geological Characteristics On Du 84 Block Xing ? Group Of Shuguang Oilfield

The reservoir of Du 84 block Xing Longtai group is gravity flow sublacustrine fan,is put into production earlier in Liaohe super heavy oil reservoir.The oil layer of Xing I group is good,a large area of contiguous distribution on the plane,the oil buried depth of 650 ~ 750 m.The average thickness of oil layer is 14.2m.There is water on the side of the reservoir.Lithology is mainly rudaceous sandstone and pebbled sandstone,conglomerate and then inequigranular sandstone,The porosity is 30.3%,permeability at 2277 m D.Density of 20 DEG C when the average 1.007g/cm3;50 DEG C when the viscosity is 19.16×104mPa.s;colloid;the average asphaltene content was 56.78%;Solidification point with an average of 29.0 ?;Wax content is an average of 1.82%,belonging to the super heavy oil reservoir.The stratigraphic sequence are divided by using high-resolution sequence stratigraphy.To study structural features,sedimentary characteristics,reservoir characteristics,interlayer insulation characteristics,and oil reservoir characteristics of each small layer.Strata Xing?presents mainly as a south east tilted monoclinal structure.Its main sedimentary type are roots fan and inner middle fan of fan delta.The characteristics of the reservoir are high porosity,high permeability and good continuity.Muddy interlayer and interlayer of physical property are developed.Interlayer insulation development is controlled by sequence interface and sedimentary microfacies.Interlayer mainly develops in the sand groups.Mezzanine mainly develops in the small layers.As a whole,the characteristic of oil reservoir is “East thick West thin”,from northeast to southwest,oil reservoir distribution appears as a strip or potatoes.On the basis of studying configurations,the sedimentary facies model and attribute model are established.In order to establish sedimentary facies model,two methods are adopted respectively.One is deterministic modeling method,the other is the combination of Sequential indicator simulation and facies controlling method.Attribute model mainly adopts the combination of sequential gaussian simulation and facies controlling method.The change of reservoir description that from the qualitative analysis to the semi-quantitative and quantitative analysis is achieved.And in order to verify the reliability of model,the method of "probability distribution consistency check" is used.