The cyclic water-flooding method is effective for development of oil in low-permeability matrix of limestone reservoir and unsuitable for the oil-wetreservoir.
周期注水是开发灰岩储层低渗透基质中原油的一种有效方法，但对于亲油储层效果较差。
2
The conclusion is: capillary force is in first, elastic force is in second, water-wetoilreservoir is more suitable to cyclic water injection.