埕岛油田馆陶组上段油藏地质模型

埕岛油田馆陶组上段属河流相砂岩 ,油气富集程度高 ,该层系已探明石油地质储量占埕岛油田总储量的 89.6% ,产能高 ,原油性质相对较好 ,该油田目前仍处于天然能量开采阶段。通过对馆上段油藏的综合分析 ,建立了高度概括的油藏概念地质模型 ,认为馆上段河道砂油藏为曲流河相正韵律细粒沉积为主 ,具有高孔隙度、高渗透率、高黏度、高饱和度、高非均质程度等特点 ,砂体变化快 ,油层疏松易出砂。采用测井约束地震反演与井资料密切结合 ,建立了描述储集砂体分布和油藏属性参数特征的静态地质模型 ,采用随机模拟方法建立了馆上段 1 2砂组至 6砂组的三维定量地质模型。图 1参 3(徐英霞摘 )

Geologic model of the Upper Guantao Formation in Chengdao oil field

Upper part of Guantao Formation in Chengdao oil field is a fluvial sandstone with abundant oil and gas. The proven OOIP of this formation accounts for 89.6 % of total proven OOIP in this oil field. This formation has high productivity and relative good oil quality. Now this oil field is still producting by natural energy. By comprehensive analyses, a highly summarized conceptual geological model for this reservoir is established in this paper. It is recognized that this sandstone reservoir is of meandering river facies with positive rhythm, fine grained sediments mainly; and has the characteristics of high porosity, high permeability, high oil saturation, high oil viscosity , and strong heterogeneity. The sand bodies change rapidly, and the sandstone is very loose and will have sand up inflow easily during oil production. Integrating the result of well logging record and constrained inversion of seismic records and other well information, a static geologic model describing the distribution of reservoir sand bodies and their petrophysical properties is established and a three dimensional quantitative model of 1 2 to 6 sand zone in Upper Guantao Formation is set up by probability modelling technique.