The conclusion is: capillary force is in first, elastic force is in second, water-wet oil reservoir is more suitable to cyclic water injection.
结论是，毛管力的作用是第一位的，弹性力的作用是第二位的，水湿油层更适合周期注水。
The cyclic water-flooding method is effective for development of oil in low-permeability matrix of limestone reservoir and unsuitable for the oil-wet reservoir.
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。
The sandstones of reservoir act as slightly water-wet.
储层砂岩表现为弱亲水。
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