水驱油田凹-S形含水上升规律表征方法的扩展

袁迎中; 汤紫琪; 凌霄; 黄冬梅; 于成超; 戚志林; 严文德

doi:10.3969/j.issn.1006-6535.2024.06.010

特种油气藏 >

2024 , Vol. 31 >Issue 6: 84 - 90

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.06.010

油藏工程

水驱油田凹-S形含水上升规律表征方法的扩展

袁迎中 ,
汤紫琪 ,
凌霄 ,
黄冬梅 ,
于成超 ,
戚志林 ,
严文德

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1.重庆科技大学石油与天然气工程学院,重庆 401331;
2.中海石油(中国)有限公司湛江分公司,广东湛江 524057

袁迎中(1983—),男,高级工程师,2004年毕业于西南石油学院石油工程专业,2009年毕业于西南石油大学油气田开发工程专业,获博士学位,现主要从事油气渗流理论、复杂油气田开发理论及技术方面的研究工作。

收稿日期: 2023-11-16

修回日期: 2024-09-19

网络出版日期: 2025-01-22

基金资助

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)

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Extension of Characterization Method of Concave-S Shape Water Cut Rising Law in Water Flooding Oilfield

Yuan Yingzhong ,
Tang Ziqi ,
Ling Xiao ,
Huang Dongmei ,
Yu Chengchao ,
Qi Zhilin ,
Yan Wende

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1. School of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;
2. CNOOC (China) Limited Zhanjiang Branch,Zhanjiang,Guangdong 524057,China

Received date: 2023-11-16

Revised date: 2024-09-19

Online published: 2025-01-22

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摘要

针对水驱油田凹-S形含水上升规律不易诊断且拟合效果较差的问题,综合考虑S形含水上升曲线高含水期偏离直线的情况,以及凹形含水上升曲线对S形含水上升曲线的增强或减弱作用,引入与含水饱和度有关的二次项、对数项及与含水率相关的形态指数n,建立表征凹-S形含水上升规律的扩展型水驱曲线方程。新方程兼具凹形和S形含水上升曲线的特征和优势,拓展了常规含水上升曲线的适用范围,提高了含水上升规律描述的准确性。将研究成果应用于WZ油田,结果表明:利用多元回归分析方法,获得了方程的相关参数,对凹-S形含水上升规律进行综合表征,拟合效果显著提高,拟合的R²达0.977 8。在实际应用过程中,可根据已有的生产数据回归得到扩展型水驱曲线方程系数,据此预测不同含水率时的累计产油量,或预测不同累计产油量时的含水率。研究成果对准确分析或预测油田含水上升规律具有重要作用。

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

本文引用格式

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 . DOI: 10.3969/j.issn.1006-6535.2024.06.010

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 characteristics and advantages of concave and S-shaped water cut rising curves,broadens the application scope of conventional 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 comprehensively characterized.The fitting effect is significantly enhanced,and the fitted R² reaches 0.977 8.In the actual application 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 correspondingly,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.

Key words： concave-S shape water cut rising law; waterflooding curve; morphological index; characterization method; multiple regression

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