杏北地区扶杨油层沉积相研究及有利区预测

Study on Sedimentary Facies and Favorable Area Prediction of Fuyang Reservoir in Xingbei Region

杏北扶杨油层是大庆长垣下部含油组合的重要组成部分，广泛发育了以河流、三角洲沉积为主的陆相沉积体系。在系统收集杏北地区岩心、录井、测井和分析化验等资料基础上，建立了河流相沉积单元对比方法，开展了针对扶杨油层沉积微相、砂体展布特征的综合分析，表明扶杨油层主要发育分流河道、决口水道砂体，各类河道砂体对含油性具有明显的控制作用。通过构造发育吏、油源及埋藏热演化史的研究，对杏北扶杨油层的油藏成藏条件进行了深入分析，认为油源、岩性非均质和断层遮挡是原油富集的先决条件。为进一步揭示扶杨油层储层发育的有利部位，优选含油富集区块，指导勘探部署和储量评价提供了重要依据。

Fuyang Reservoir in Xingbei Region was an important composition of oil-bearing combination in the lower part of Daqing Placanticline,the continental sedimentation system mainly dominated by the fluvial-delta deposition was developed extensively.Based on the systematic data collection of core,logging,well logging and data analysis of Xingbei Region,a comparison method for sedimentary units of fluvial facies reservoirs was established,a comprehensive analysis was carried out on the characteristics of sedimentary microfacies,sandbody distribution in Fuyang Reservoir.The results show that distributary channel and crevasse channel sand-bodies are mainly developed in Fuyang Reservoir;various type of the channel sands have an obvious controlling effect on the oil-bearing properties of the reservoir.By studying the reservoir-generating conditions of development history of palaeostructure,oil source and thermal evolution,its reservoir forming conditions are deeply studied.The result shows that the direction of oil source and lithologic heterogeneity,fault screen are the oil enrichment conditions.Thus,an important basis is provided for revealing the favorable locations of developed reservoirs in Fuyang Reservoir,optimizing oil enrichment blocks,and guiding the exploration and reserves evaluation.