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江汉油田,根据岩心润湿性试验证明,油层性质都是亲水或强亲水的。毛细管自吸水量可以达到13—26%,吸水排油采收率可达18—34%。因而,可以利用油层的亲水性能,采取多种注水方式,有效地开发小油砂体、非均质油层和高含水层,不断改善开发效果,提高驱油效率。一、室内油层物理模型试验影响油层水驱油效率的原因是多方面的,但主要因素是油层岩石的润湿性、油水界面张力的大小及孔隙结构的分布等。根据大庆油田室内水驱油效率试验表明:在油水界
Jianghan Oilfield, according to the core wettability test proved that the nature of the reservoir are hydrophilic or strong hydrophilic. Capillary self-water absorption can reach 13-26%, water absorption oil recovery up to 18-34%. Therefore, we can take advantage of the hydrophilic properties of the reservoir, adopt a variety of water injection methods, effectively develop small oil sands, heterogeneous reservoirs and aquifers, and continuously improve development results and improve oil displacement efficiency. First, the physical model test of indoor oil layer The reasons that affect the efficiency of oil-water flooding are various, but the main factors are the wettability of reservoir rock, the size of oil-water interfacial tension and the distribution of pore structure. According to Daqing Oilfield indoor water flooding efficiency test shows that: in the oil-water sector