特种油气藏2017，Vol.24Issue(3)：21-25,5.DOI:10.3969/j.issn.1006-6535.2017.03.004
柴西地区扎哈泉致密油成藏主控因素分析
Analysis on Main Factors Controlling Tight Oil Accumulation in Zhahaquan Area, Western Qaidam Basin
摘要
Abstract
To identify and confirm further the "sweet spots" of tight oil reservoirs in Zhahaquan area, the geological conditions of tight oil accumulation in this area were analyzed comprehensively by using core, assay, logging and seismic data.It is indicated that in Upper Ganchaigou Formation in Zhahaquan area, beach bar sandbodies are developed in the setting of lacustrine facies, and large-scale good source rocks are also deposited.The sandbodies in the middle of beach bar are the best reservoirs, and their average porosity and average permeability of effective reservoirs are 5.9% and 0.43×10-3μm2, respectively.Abnormal pressure is the main drive of primary migration of tight oil in this area, and micro/nano pores and interlayer fractures are the main migration pathways.The distribution of "sweet spots" is controlled jointly by slope setting, source-reservoir matching and reservoir physical properties.Mid-bar sandbodies in good source rock development areas are the favorable search targets of "sweet spots" in the following step.关键词
致密油/源储配置/主控因素/"甜点"预测/扎哈泉地区/柴达木盆地Key words
tight oil/source rock-reservoir relationship/main control factor/"sweet spot" prediction/Zhahaquan area/Qaidam Basin分类
能源科技引用本文复制引用
吴颜雄,杨晓菁,薛建勤,熊宇,鲁珊珊..柴西地区扎哈泉致密油成藏主控因素分析[J].特种油气藏,2017,24(3):21-25,5.基金项目
国家科技重大专项"致密油富集规律与勘探开发关键技术"(2016ZX05046-006) （2016ZX05046-006）
中国石油科技重大专项"柴达木盆地建设高原大油气田勘探开发关键技术研究与应用"(2016E-01) （2016E-01）
