【作者】 胡峰；

【导师】 马世忠； 李椿； 周永炳；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2009， 硕士

【摘要】 大庆外围地区扶杨油层探明储量占大庆外围地区累计探明储量一半以上。扶杨油层河道砂体规模小,储层物性差,非均质性强。分析了特低渗透油藏地质特征参数、油藏特征参数,应用非达西渗流理论研究了影响开发效果的参数。在此基础上,根据低渗透储层特点,利用恒速压汞、核磁共振、低渗透渗流理论等研究手段,将喉道半径、可动流体百分数、启动压力梯度子3个参数作为低渗透油储量的评价指标,建立了与之对应的分级评价方法和分级界限。为使评价结果定量化,以便利用评价结果深入分析储层储集性能,使用主因子分析与聚类分析相结合的方法进行评价,首先对由主因子分析得到的各主因子得分进行归一化处理;然后用归一化得分与对应主因子的方差贡献率相乘后相加,得到样本总得分。根据样本总得分,运用聚类分析,进行储层分级,该方法成功地应用于大庆油田外围低渗透储层评价,为低渗透储层的合理开发提供了理论依据。按照该方法重新将低渗透储层划分为3种类型4个亚类。3类即低渗透层(Ⅰ类)、特低渗透层(Ⅱ类)、超低渗透层(Ⅲ类),其中特低渗透层和超低渗透层各细分为2个亚类。更多还原

【Abstract】 The proved reserve of Fuyang oil layer, with small-scale channel sand body, poor physical property and serious heterogeneity. The geological characteristics, reservoir characteristics of ultra low permeability reservoir are analyzed. The parameters impacting the development results are investigated using theory of non-Darey Porous media flow. Based on this, the rate-controlled mercury injection, nuclear magnetic resonance, porous flow theory of low-permeability reservoir and physical simulation were used to evaluate the reserves of low-permeability reservoirs, taking throat radius, percentage of mobile fluid, start-up pressure gradient as the evaluating indexes.The corresponding hierarchical appraisal methodand hierarchical demarcation line were set up. In order to quantitatively analyze the characteristics of the reservoir, the reservoir is tentatively evaluated with Principal Factor Analysis(PFA) and Fast Clustering Method(FCM). Firstly, the scores of the principal factors obtained by PFA are normalized; then, the normalized scores are multiplied with the weights of the corresponding principal factors and added to get the scores of the samples. The reservoirs are evaluated by applied FCM with the scores of the samples. This method has been successfully applied to the evaluation of low-permeability reservoirs in Daqing peripheral oilfield. Using this new classification method, the low-permeability reservoir are classified into three types and four sub-types. The three types include low permeability reservoir(I), extra-low permeability reservoir(II) and super-low permeability reservoir(III). The three types include low permeability reservoir(I), extra-low permeability reservoir (II),super-low permeability reservoir (III). Among them extra-low permeability reservoir and super-low permeability reservoir are the main reservoir types, they are divided into two sub-types respectively.更多还原