高温油藏新型聚合物耐氧和硫化物应用评价  

Application evaluation of new polymer for oxygen and sul⁃fide resistance in high temperature reservoirs

作　　者：刘艳华 李洪生[1,2] 王正欣 张连锋[1,2] 卢军 李浩[1,2] 郭艳 LIU Yanhua;LI Hongsheng;WANG Zhengxin;ZHANG Lianfeng;LU Jun;LI Hao;GUO Yan(Henan EOR Key Laboratory,Nanyang 473132,China;Exploration and Development Research Institute,Henan Oilfield Branch Company,SINOPEC,Nanyang 473132,China;Oil and Gas Development Management Depart-ment,Henan Oilfield Branch Company,SINOPEC,Nanyang 473132,China)

机构地区：[1]河南省提高石油采收率重点实验室,河南南阳473132 [2]中国石化河南油田分公司勘探开发研究院,河南南阳473132 [3]中国石化河南油田分公司油气开发管理部,河南南阳473132

出　　处：《精细石油化工进展》2023年第4期6-10,共5页Advances in Fine Petrochemicals

摘　　要：双河油田高温油藏驱油用聚合物配液过程中,氧分子和硫化物共存环境导致聚合物黏度损失严重。在双河油田Ⅴ下层系油藏以及85℃条件下,考察了ZJ-2、1-3、2-3聚合物在不同氧和硫化物含量下的黏度、长期稳定性及驱油性能。结果表明:氧含量越高,聚合物黏度对硫含量增加越敏感,黏度损失越大。聚合物在硫和氧共存体系下的降黏作用集中在母液配制、井口稀释混配阶段,老化黏度影响相对较小,通过在分子链上引入抗硫单体可以减少聚合物的黏度损失,具备更高的驱油性能。优选聚合物1-3在矿场应用,聚合物母液、井口聚合物黏度较普通聚合物增加56%、89%,抗水质中硫化物、氧含量波动效果较稳定,取得了初步增油降水效果。In the process of polymer liquid preparation for high temperature reserviors in Shuanghe Oilfield,the coexistence of oxygen and sulfide causes a serious loss of polymer viscosity.The viscosity,long-term stabil⁃ity and oil displacement performance of ZJ-2,1-3 and 2-3 were investigated at 85℃under different oxygen and sulfide contents in the reservoir ofⅤlower layers in Shuanghe Oilfield.Results showed that the higher the oxygen content,the more sensitive the polymer viscosity was to the increase of sulfur content,and the greater the viscosity loss was.The viscosity reduction of polymer under the coexistence of sulfur and oxygen was main⁃ly concentrated in the mother liquor preparation and wellhead dilution and mixing stage,the effect of aging vis⁃cosity was relatively small.The introduction of anti-sulfur monomer into the polymer molecular chain reduced the viscosity loss,and had better oil displacement performance.In the process of field application,the viscosi⁃ty of the mother liquor and wellhead of the preferred polymer 1-3 increased by 56%and 89%compared with the common polymer,which showed better efficiency of resisting the fluctuation of sulfide and oxygen content,and the preliminary oil increasing and water decreasing results were obtained.

关 键 词：高温油藏 聚合物降解 氧和硫化物 聚合物驱 提高石油采收率 双河油田 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]