延长油田低渗油藏分层注水缓蚀阻垢剂的制备及性能研究  

Study on preparation and performance of corrosion and scale inhibitors for layered water injection in low permeability reservoirs of Yanchang Oilfield

作　　者：李军[1] 杜科宇 任春燕[1] 吴利超 LI Jun;DU Ke-yu;REN Chun-yan;WU Li-chao(Dingbian Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Yulin 718600,China)

机构地区：[1]延长油田股份有限公司定边采油厂,陕西榆林718600

出　　处：《化学工程师》2024年第7期41-45,共5页Chemical Engineer

基　　金：陕西省科技厅2022年度省级科研项目(2022SF-561):鄂尔多斯盆地低渗油田产出水高效利用与处理技术研究。

摘　　要：本文以丙烯酸(AA)、顺丁烯二酸钠(MAH-Na)、乙烯吡咯烷酮(NVP)及自合成的季铵化咪唑啉(QIM)为单体,采用偶二异丁眯盐酸盐(V50)紫外光引发体系合成了四元共聚缓蚀阻垢剂。通过正交实验筛选出最佳单体配比为18∶6∶3.5∶2.5,结合静态结垢实验、动态腐蚀实验以及分子量测试得出最佳合成条件为:V50加量为0.6wt%、反应时间为8h、单体浓度为35wt%,此最佳条件合成的缓蚀阻垢剂的缓蚀率达86.1%,CaCO_(3)阻垢率达91.2%,CaSO_(4)阻垢率达96.1%,BaSO_(4)阻垢率达73.2%,各项性能优于市场采购的单一功能缓蚀剂与阻垢剂。In the paper,a quaternary copolymer corrosion and scale inhibitor was synthesized by using acrylic acid(AA),sodium maleic acid(MAH-Na),vinylpyrrolidone(NVP),and self synthesized quaternary ammonium imidazoline(QIM)as monomers.The system was initiated by UV light with diisobutyrate hydrochloride(V50).The optimal monomer ratio was selected through orthogonal experiments as 18∶6∶3.5∶2.5.Combined with static scaling experiments,dynamic corrosion experiments,and molecular weight tests,the optimal synthesis conditions were obtained as follows:V50 dosage of 0.6wt%,reaction time of 8h,monomer concentration of 35wt%.The corrosion inhibition rate of the corrosion and scale inhibitor synthesized under the optimal conditions reached 86.1%,CaCO_(3) scale inhibition rate reached 91.2%,CaSO_(4) scale inhibition rate reached 96.1%,and BaSO_(4) scale inhibition rate reached 73.2%.The performance was evaluated using on-site produced water as an example due to the single corrosion and scale inhibitors purchased in the market.

关 键 词：四元共聚 单体配比 正交实验 缓蚀阻垢剂 

分 类 号：TE254[石油与天然气工程—油气井工程]