【摘要】 延长油区位于鄂尔多斯盆地,其地质构造形态总体呈为东翼宽缓、西翼陡窄的不对称大向斜,储层分布在延长组长6、长4+5、长2内。储层岩性为浅灰绿色长石砂岩,砂岩成分成熟度较低,结构成熟度较高,长7—长4+5储层以细砂岩为主,长2储层以细—中粒砂岩为主。储层岩石物理特征为致密砂岩。文章针对延长油矿含油储层的特征,建立形成单孔隙度测井系列为主的地层评价技术,包括单孔隙度测井交会图技术、曲线重叠技术、区域小层对比技术。该地层评价技术在地层对比、油层识别和沉积相分析中发挥重要作用。更多还原

【Abstract】 The Yanchang oil zone is located in the Ordos Basin. Its overall tectonic shape is a asymmetric large syncline with the East Wing,West Wing steep narrow. The lithology of reservoir is all almost the light gray-green feldspathic and high maturity sandstone. The petrophysical characteristics of reservoir is tight sand with low porosity and permeability. With progress of Yanchang Oilfield logging equipment and technology,a single porosity log series for reservoir characteristics have gradually formed,including cross-plot technology,curve overlapping technology,regional layer contrast technology,which is playing an important role in the stratigraphic correlation,reservoir identification and sedimentary facies analysis.更多还原