苏北盆地草舍油田泰州组储层水敏伤害及其对注水开发的影响  

Water-sensitive damage and its impacts on the waterflood development of the Taizhou Formation reserviors in Caoshe oilfield,the Subei Basin

作　　者：章雄冬[1] 朱玉双[2] 曹海虹[1] 马慧杰[1] 程秀梅[1] 

机构地区：[1]中国石油化工股份有限公司华东分公司规划设计研究院,江苏扬州225007 [2]西北大学地质学系大陆动力学国家重点实验室,陕西西安710069

出　　处：《石油与天然气地质》2010年第4期504-510,共7页Oil & Gas Geology

摘　　要：运用真实砂岩微观模型实验技术,对苏北盆地草舍油田泰州组储集砂岩进行了浸泡型水敏性实验。结果显示,该砂岩具中等水敏。为充分了解水敏伤害对注水开发的影响,开展了真实砂岩微观模型水驱油实验,包括单模型及组合模型两种实验类型,分别模拟微观及宏观水驱油,并比较了水敏伤害前、后水驱油特征的变化。结果表明,水敏伤害没有改变水驱油方式及残余油形态,但单模型的绕流现象整体增强,驱油效率降低,主要受注水压力、注水位置及微观非均质性等因素影响;而组合模型的采收率整体呈下降趋势,受微观非均质性及宏观非均质性共同控制。为避免水敏伤害对注水开发的影响,建议注入水矿化度为11.99 g/L左右。Using the experimental technique of natural sandstone micromodel, an emmersion experiment of water sentivity is conducted for the Taizhou Formation reservoir sandstone in the Caoshe oilfield, Subei Basin. The ex- model are conducted, including two experimen types, i. e. a single model type and a combined model type, which simulate micro-water-drive and macro-water-drive respectively and compare water-drive-oil variances before and after water-sensitive damage. The results show that the water-sensitive damage does not change the style of water drive oil and the configuration of residual oil. For the single model experiment, however, the bypassing phenome- non is strengthened on the whole and the oil displacement efficiency is lowered, mainly controlled by several fac- tors such as water-injection pressure, water-injection location and micro-heterogeneity. For the combined model experimen, the oil recovery ratio tends to decline totally, controlled by both the micro-heterogeneity and macro- heterogeneity. To avoid the impact of water-sensitive damage on waterflood development, it is suggested that the injected water should be around 11.99 g/L in salinity

关 键 词：驱油效率 水敏伤害 真实砂岩微观模型 泰州组 草舍油田 苏北盆地 

分 类 号：TE341[石油与天然气工程—油气田开发工程]