【摘要】 为明确柴达木盆地扎哈泉地区X井区下油砂山组Ⅳ-27+28小层滨浅湖砂坝展布特征,根据沉积学、测井地质学、储层构型分级理论,结合岩心、测井和注水动态等资料,采用岩心识别、底部等高、测井曲线相似、油水分布关系等方法,识别单一坝并将研究区目的层划分为6个期次(4级构型单元),研究单一坝展布方向、面积、厚度、长宽比等几何特征,总结单一坝展布规律。结果表明:研究区大部分单一坝展布以NEE向为主,面积小于1.20 km~2,厚度小于1.81 m,长宽比一般大于2;厚度与长度、宽度之间相关关系较弱,长宽比与宽厚比呈正相关关系。根据长宽比,将单一坝分为单井控制型、片状、长条状,大部分呈长条状。该结果为研究区滨浅湖单一坝研究提供参考,为油田开发方案调整提供依据。更多还原

【Abstract】 The distribution of Lower Youshashan Formation Ⅳ-27+28 shore-shallow lake sand bar in the well X of Zhahaquan Area,Tsaidam Basin is still unclear.The identification of the distribution is beneficial to the exploitation of remaining oil in the oilfield to make clear the geometric parameters and distribution rules of sand bar.Using sedimentology,well logging geology,reservoir configuration classification theory and core,well logging,water injection dynamic data,combined with core identification,equal bottom height,well logging curve similarity,oil-water relationship and other methods,we may identify a single bar and divide the target layer of the study area into six periods(fourth stage configuration unit),and the geometric characteristics such as direction,area,thickness,length-width ratio of single bar are studied,and the distribution rules of a single bar are summarized.According to the results,the research shows that the distribution direction of most single bars in the study area is NEE direction,the area is smaller than 1.20 km2,the thickness is less than 1.81 m,and the aspect ratio is generally greater than 2.The correlation between thickness,length and width is weak,and the aspect ratio and width-thickness ratio are positive correlation.According to the ratio of length and width,single bar can be divided into single-well control type,slice type and strip type,and most of the single bars are long strip type.The results provide a reference for the study of single bars in shore-shallow lake and a basis for the adjustment of oilfield development plan.更多还原