摘要
流动单元的平面分布是储层平面非均质性的直观表现,为了加深对储层非均质性的认识,以鄂尔多斯盆地Y井区为例,开展了在研究区延8储层流动单元的研究。采用流动带指数划分方法,在此基础上选择孔隙度、渗透率、储层质量因子(RQI)、流动带指数(FZI)对延8_(1)、延8_(2)小层定量划分流动单元。结果表明:1)延8_(1)和延8_(2)小层流动单元均分为Ⅰ类、Ⅱ类、Ⅲ类,流动单元Ⅰ类的孔隙度和渗透率最大,储集性和渗透性最好;流动单元Ⅱ类的孔隙度和渗透率较大,储集性和渗透性较好;流动单元Ⅲ类的孔隙度和渗透率最小,储集性和渗透性最差。2)在研究区平面展布上Ⅰ类呈星点状分布、Ⅱ类呈条带状分布、Ⅲ类呈片状。3)以贝叶斯判别函数式验证划分结果,延8_(1)、延8_(2)小层流动单元的正判率分别为98.5%和92.8%。
The plane distribution of flow units is an intuitive manifestation of reservoir plane heterogeneity.In order to deepen the understanding of reservoir heterogeneity,taking Y well area in Ordos Basin as an example,the study of flow units in Yan 8 reservoir in the study area was carried out.In this paper,the method of flow zone index division is adopted,and the parameters such as porosity,permeability,reservoir quality coefficient RQI and flow zone index FZI are selected to divide the quantitative flow units of Yan 8_(1)and Yan 8_(2)sublayers.The results show that:(1)The flow units in Yan 8_(1)and Yan 8_(2)sub-layers are all divided into Class I,Class II and Class III,and Class I has the largest porosity and permeability,and the best reservoir and permeability.The porosity and permeability of Class II flow unit are larger,and the reservoir property and permeability are better.The porosity and permeability of ClassⅢflow unit are the smallest,and the reservoir property and permeability are the worst.(2)In the plane distribution of the study area,Class I is in the form of stars,Class II is in the form of strips,and Class III is in the form of sheets.(3)Bayesian discriminant function is used to verify the division results,and the positive judgment rates of the flow units in Yan 8_(1)and Yan 8_(2)are 98.5%and 92.8%respectively.
作者
刘梦
李爱荣
侯宾东
赵凯丽
霍瑞麟
陈兵兵
LIU Meng;LI Airong;HOU Bindong;ZHAO Kaili;HUO Ruilin;CHEN Bingbing(Xi′an Shiyou University,Xi′an 710065,China;Key Laboratory of Petroleum Accumulation Geology in Shaanxi Province,Xi′an Shiyou University,Xi′an 710065,China;No.3 Gas Production Plant of Yanchang Gas Field of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Yan'an 716000,China)
出处
《河北地质大学学报》
2025年第2期42-49,共8页
Journal of Hebei Geo University
基金
国家自然科学基金项目(41772140)。
