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不同二类油层水驱及聚驱驱替规律研究

期刊名称：中外能源，2010，（11）
时间：0
分类：TE357.11[石油与天然气工程—油气田开发工程]
作者机构：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318
相关基金：国家自然科学基金重点项目（50634020）、黑龙江省杰出青年基金项目“油层多孔介质内纳观渗流界面作用力研究”联合资助.
相关项目：低渗透油层提高驱油效率的机理研究

关键词：二类油层, 水驱特征, 聚驱特征, 水油比, class Ⅱ reservoir characteristic of water drive characteristic of polymer flooding

中文摘要：

总结萨北开发区二类油层水驱与聚驱规律,为编制开发方案提供依据,进行了室内水驱、聚驱实验。实验按常规驱油实验步骤进行,首先水驱至含水率98%,然后开始转注聚至不出油。实验结果表明,在水驱段,萨尔图组和高台子组二类油层的水驱采收率均与有效渗透率呈正相关关系,其水驱开发指标预测也皆可沿用一类油层的水驱驱替特征曲线方法;相同渗透率下,萨尔图层的水驱采收率要高于高台子层,说明其油层物性更好。在聚驱段,在相同渗透率,以及水驱后注入相同相对分子质量、相同浓度的聚合物溶液的条件下,高台子组的二类油层岩心两端压差变化更加明显,而萨尔图油层注聚量小于高台子层。萨尔图组和高台子组二类油层的采收率在半对数坐标系下均与水油比呈二次函数关系,可以用此关系预测萨尔图组和高台子组二类油层的聚驱开发指标。

英文摘要：

ILaboratory experiments of water drive and polymer flooding are made for knowing the displacement law of these two ways and providing foundation for development programming.The experiment procedure is the same as normal displacement experiment.First,water drive is done until the water cut is 98%,and then polymer injection begins until no oil.Laboratory results show that,oil recovery of water drive and effective permeability presents good linear relationship,which is same to the classΙreservoir;At the same permeability,the oil recovery of Saertu reservoirs is higher than that of Gaotaize reservoir,which shows the better physical property of it.At the stage of polymer flooding,under the conditions of the same permeability,and the same polymer solution injected with the same molecular weight and concentration,pressure difference between two points of the class Ⅱ reservoir core is more obvious,thus polymer injection volume is more in Gaotaizi formation.While oil recovery at the stage of polymer flooding after water drive and water-oil ratio all presents quadratic function relationship in the semi-log coordinate in Saertu and Gaotaizi class Ⅱ reservoirs.And this relationship can be used for forecasting development index in polymer flooding in the Saertu and Gaotaizi class Ⅱ reservoirs.

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