田丰,杜晓康,王晓冬,谢伟伟,吴德华
TIAN Feng,DU Xiaokang,WANG Xiaodong,XIE Weiwei,WU Dehua

• 1:中国地质大学(北京)能源学院
• 2:中国地质大学(北京)非常规天然气能源地质评价与开发工程北京市重点实验室

摘要(Abstract)：

稳定直线段的出现是水驱特征曲线正确运用的基础。对丙型水驱曲线拓展推导,得到反映油水渗流特征的S_w—f_w关系,再进行坐标变换,进而得到二次方S_w—(1-f_w)~(1/2)关系式。基于该关系式对实际油水相对渗透率数据进行分析,S_w随(1-f_w)~(1/2)的增大,呈现出先缓慢后急剧上凸减小的趋势。当急剧上凸出现时,实际数据不再符合二次多项式,该点即为直线段出现的端点。数模验证与实例应用表明该方法可以较准确地对丙型水驱曲线的直线段出现时间进行预测。
The accurate application of the water drive characteristic curve is based on the appearance of the stable linear segment. By the extended derivation of Type-C water drive curve,the relationship of Swversus f_w which reflects the oil-water flow characteristics was obtained. And furthermore,through the coordinate transformation,the relationship between S_w and( 1-f_w)~(1/2) was derived which satisfies the quadratic polynome. On the basis of the new relationship,the actual oil-water relative permeabilities were analyzed,with the increase of( 1-f_w)~(1/2),S_w decreases slowly first and then bends downwards. When the rapidly upward bend appears,the actual data no longer meet the quadratic polynomial i. e. at this time this point means the appearance timing of the linear segment. The numerical simulation verification and the case application prove that the method can much more accurately predict the appearance time of the linear segment of Type-C water drive curve.

关键词(KeyWords)： 丙型水驱曲线;含水饱和度;含水率;油水相对渗透率;直线段
Type-C water drive curve;water saturation;water cut;oil-water relative permeability;linear segment

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“大型油气田及煤层气开发”(2016ZX05037-006)

作者(Author): 田丰,杜晓康,王晓冬,谢伟伟,吴德华
TIAN Feng,DU Xiaokang,WANG Xiaodong,XIE Weiwei,WU Dehua

DOI: 10.19597/j.issn.1000-3754.201709051

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