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碳酸盐岩油藏通常是在中性亲水条件断裂,防止了水自吸入基岩。通过水驱提高原油采收率方法很少成功,碳酸盐岩平均原油采收率通常小于30%,因此,在这类油藏中提高原油采收率潜力是十分大的。通过两个室内实验,结果表明,当温度高于100℃时,通过用PW:SSW以2:1～1:8的比例混合的原油采收率比在一个自吸过程中用纯的PW的原油采收率相对高一些。在粘性驱中,SSW驱替油比PW驱替油更有效,并且得到较高的采收率。
Carbonate reservoirs are generally fractured in neutral-hydrophilic conditions, preventing water from self-sucking in bedrock. Methods for increasing oil recovery through waterflooding have been less successful, with carbonate recovery typically less than 30%, so the potential for enhanced oil recovery in such reservoirs is significant. Through two laboratory experiments, the results show that when the temperature is higher than 100 ° C, the oil recovery by mixing PW: SSW in the ratio of 2: 1 to 1: 8 is lower than that of pure PW Oil recovery is relatively high. In viscous flooding, SSW displacing oil is more efficient than PW displacing oil and results in higher recovery.