特种油气藏2024，Vol.31Issue(6)：84-90,7.DOI:10.3969/j.issn.1006-6535.2024.06.010
水驱油田凹-S形含水上升规律表征方法的扩展
Extension of Characterization Method of Concave-S Shape Water Cut Rising Law in Water Flooding Oilfield
摘要
Abstract
Aimed at the issue that the concave-S-shaped water cut rising law of water flooding oilfield is difficult to diagnose and the fitting effect is unsatisfactory,considering the circumstance that the S-shaped water cut rising curve deviates from the straight line in the high water cut stage,and the concave water cut rising curve strengthens or weakens the S-shaped water cut rising curve,the quadratic term,the logarithmic term related to water saturation and the morphological index n related to water cut are introduced,and the extended water flooding curve equation characterizing the"concave S-shaped"water cut rising law is established.The new equation integrates the charac-teristics and advantages of concave and S-shaped water cut rising curves,broadens the application scope of conven-tional water cut rising curves,and enhances the accuracy of the description of the water cut rising law.The research results are applied to WZ Oilfield.The outcomes reveal that the relevant parameters of the equation are acquired by employing the multiple regression analysis method,and the"concave-S shaped"water cut rising law is comprehen-sively characterized.The fitting effect is significantly enhanced,and the fitted R2 reaches 0.977 8.In the actual ap-plication process,the coefficient of the extended waterflooding curve equation can be acquired through regression based on the existing production data,and the cumulative oil production at different water cuts can be predicted cor-respondingly,or the water cut at different cumulative oil production can be predicted.The research outcomes play a crucial role in accurately analyzing or predicting the law of water cut rise in oilfields.关键词
凹-S形含水上升规律/水驱曲线/形态指数/表征方法/多元回归Key words
concave-S shape water cut rising law/waterflooding curve/morphological index/characterization meth-od/multiple regression分类
能源科技引用本文复制引用
袁迎中,汤紫琪,凌霄,黄冬梅,于成超,戚志林,严文德..水驱油田凹-S形含水上升规律表征方法的扩展[J].特种油气藏,2024,31(6):84-90,7.基金项目
国家自然科学基金联合基金"海上稠油超临界多源多元热流体发生机理及在储层中的作用机制研究"(U22B2074) （U22B2074）
