注水水质对海上油田笼统注水开发影响实验研究  

Experimental study on the effect of water injection quality on general water injection development in offshore oilfields

作　　者：侯岳 陈斌 敖文君 王成胜 田津杰 阚亮 季闻 HOU Yue;CHEN Bin;AO Wenjun;WANG Chengsheng;TIAN Jinjie;KAN Liang;JI Wen(CNOOC Energy Technology Drilling&Production Co.,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《石油化工应用》2020年第9期11-14,共4页Petrochemical Industry Application

基　　金：“十三五”国家科技重大专项“海上多层合采稠油油藏层间干扰规律实验研究”,项目编号:2016ZX05025-001-003;“十三五”国家科技重大专项“渤海油田化学驱配套工艺、方案优化研究及现场示范”,项目编号:2016ZX05058-003-001。

摘　　要：针对注水水质对海上油田注水开发的影响问题,主要考虑铁离子对水质指标和地层伤害的影响,通过室内实验研究发现,含铁注入水中,溶解氧、硫化物的存在能够显著增加悬浮物浓度。另外,本文研究了不同铁离子浓度和不同温度下含铁离子注入水的腐蚀性,结果表明,随着铁离子浓度和温度的升高,注入水腐蚀速率明显增加。岩心伤害性实验结果表明,铁离子的存在造成岩心渗透率降低,原因是产生的Fe(OH)3和FeS沉淀容易造成岩心堵塞,并且粒径更小的FeS沉淀对岩心的伤害更明显,岩心伤害率可达58%。In view of the effect of water injection quality on the development of offshore oil field injection,the main consideration is the effect of iron ions on water quality indicators and formation damage.The experimental results showed that the suspended solid content can be increased by the existence of dissolved oxygen and sulfide.The effect of iron ion content and temperature on the corrosion property for injection water was also investigated,and the results showed that the corrosion rate became much bigger due to the increasing of iron ion concentration and temperature.Core damage experiments indicated that the core permeability was reduced largely by the iron ions,which attributed to the blockage of core by precipitant of Fe(OH)3 and FeS,furthermore,the smaller size for FeS,the more serious damages for the cores,and the core damage rate can reach 58%.

关 键 词：笼统注水开发 注入水质 铁离子 地层伤害 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]