高温油藏条件下聚合物驱油效率实验—以泌阳凹陷双河油田为例

doi:10.11743/ogg20090620

Abstract

Abstract:

According to the characteristics of high temperature(84.3℃) and low permeability of reservoirs in the Shuanghe-V block of the Biyang Sag,polymers 1630s and ZL-I with different degrees of hydrolysis are selec-ted for an experiment on oil displacement efficiency.Thanks to its high viscoelasticity,displacement efficiency of high concentration polymers is obviously higher than that of low concentration polymers.However,considering the cost,polymers of 1 600-2 000 mg/L is proposed for use.An additional experiment on displacement efficiency of different slug sizes is conducted too.The results show that the displacement efficiency of bigger polymer slug is higher than that of smaller polymer slug.However,the incremental displacement efficiency is insignificant when the slug size exceeds 0.5 PV.Therefore,the suggested size of slug should be between 0.4 PV and 0.5 PV.Comparing the experiment results before and after the maturing of the polymers,we find that polymer 1630s with low degree of hydrolysis is more favorable for this high-temperature reservoir.

Key words: concentration, degree of hydrolysis, slug size, oil displacement efficiency, high-temperature reservoir, Biyang Sag

CLC Number:

TE357.4

Han Jie, Zhang Liqing, Zhou Yongqiang, Tang Dazhen. An experimental study of displacement efficiency of polymer flooding under high temperature reservoir conditions:an example from Shuanghe oilfield in the Biyang Sag[J]. Oil & Gas Geology, 2009, 30(6): 797-800.

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An experimental study of displacement efficiency of polymer flooding under high temperature reservoir conditions:an example from Shuanghe oilfield in the Biyang Sag

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