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  

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

作　　者：韩杰[1] 张丽庆[2] 周永强[2] 汤达祯[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油化工股份有限公司河南油田分公司勘探开发研究院,河南南阳473132

出　　处：《石油与天然气地质》2009年第6期797-800,共4页Oil & Gas Geology

摘　　要：针对泌阳凹陷双河V下区块高温(84.3℃)低渗透的油藏条件,选取不同水解度的聚合物1630s和ZL-I进行驱油效率实验。通过不同浓度聚合物对驱油效率的影响实验发现,高浓度聚合物由于具有较高的粘弹性,驱油效率明显高于低浓度聚合物,但考虑到经济因素,建议注入浓度为1 600～2 000 mg/L。不同段塞尺寸驱替实验说明,注入大段塞聚合物比注入低段塞驱油效率更高,但超过0.5 PV时驱油效率提高缓慢,故段塞尺寸为0.4～0.5 PV。由聚合物老化前、后对比驱油实验得出,低水解度聚合物1630s更适合此高温油藏条件。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 selected 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 effi- ciency 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.

关 键 词：浓度 水解度 段塞尺寸 驱油效率 高温油藏 泌阳凹陷 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]