高斌,许诗婧,胡心玲,赵旭,王长权

• 1:长江大学石油工程学院
• 2:油气钻采工程湖北省重点实验室(长江大学)
• 3:中国石化江汉油田分公司勘探开发研究院

摘要(Abstract)：

为研究水敏对低渗储层油水两相渗流的影响，以江汉盆地XG组储层为例，结合微纳米CT、SEM开展研究，通过对比水敏前后孔隙结构、油水相对渗透率曲线、含水率曲线和无因次指数曲线评价水敏对油水两相渗流的影响。实验结果表明：岩心在发生水敏后导致黏土膨胀，在流体作用下发生分散运移，使得渗透率下降，孔喉半径和配位数分布频率有降低的趋势。从油水两相渗流中可以看出原油采收率在水敏后得到了提高，水敏后含水率上升更快，含水变化率峰值增大；水敏后的提液比水敏前提液更有效果，无因次吸水指数因岩石孔喉细小，毛细管滞留原油现象严重，注入水利用率很低，因此随着注入水的不断注入，无因次吸水指数急剧升高。

关键词(KeyWords)： 油水两相渗流;水敏;含水率曲线;无因次采油指数;无因次吸液指数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目“高温高压CO2-原油-地层水三相相平衡溶解度规律”(51404037);; 中国石化股份公司科研项目“新沟嘴组低渗透敏感性储层开发关键技术研究”(P19013-4)

作者(Author): 高斌,许诗婧,胡心玲,赵旭,王长权

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