南堡油田低渗透油藏双子表面活性剂增注技术的应用研究  

Study and application of low permeability quaternary binary surfactant on-line injection technology in Nanpu Oil Field

作　　者：刘彝[1] 吴均[1] 宋颖志 刘京[1,2] 于洋洋[1,2] LIU Yi;WU Jun;SONG Yingzhi;LIU Jing;YU Yangyang(Drilling and Production Technology Research Institute,Jidong Oilfield Company,PetroChina,Tangshan 063002,China;Key Laboratory of Nano Chemistry,CNPC,Beijing 100083,China)

机构地区：[1]中国石油冀东油田分公司钻采工艺研究院,河北唐山063002 [2]中国石油天然气集团公司纳米化学重点实验室,北京100083

出　　处：《中国矿业》2022年第S01期460-464,共5页China Mining Magazine

基　　金：油田重大专项“复杂断块特低渗透油藏效益开发技术与应用研究”资助(编号:KF2018A05)。

摘　　要：针对南堡4-3区东二段低渗透油藏注水井注入压力高、欠注严重、常规酸化有效期短等问题,研究应用了JDZC季胺盐双子表面活性剂降压增注工艺,通过室内实验表明,120℃下该体系与南堡4-3区东二段油藏原油的界面张力可达到10^(-2)~10^(-3)mN/m数量级,能够将岩石表面由强亲水转为弱亲水,且能有效防止黏土膨胀,岩芯驱替降压实验表明,经过JDZC活性增注剂处理后,驱替前后降压率达到30%以上。现场24口井应用结果表明,现场实施有效率为94%,注水井初期注水压力平均下降9.4 MPa,有效期超过200 d,平均单井增注超过2×10^(3) m^(3),改善了南堡油田低渗透油藏注水难题。Pointiong at the problems of high water injection,serious under injection,short term of validity of common acid in low permeability oil reservoir of Nanpu Oil Field,this paper applying the on-line injection well stimulation technology of quaternary binary surfactant.It is indicated that the interfacial tension of crude oil can reach 10^(-2)-10^(-3) mN/m.It can change the rock strong water wet into weak water wet,and can prevent clay swelling.The experiments show that the water drive depressurization rate can reach above 30%.The field application results of 24 wells show that the field implementation efficiency is 94%,the initial injection pressure of water injection wells decreased by 9.5 MPa on average,the validity period is 200 d,and the average enhanced injection of single well was more than 2×10^(3) m^(3),which improved the water injection problem of Nanpu Oil Field low permeability reservoir.

关 键 词：低渗透油藏 降压增注 双子表面活性剂 南堡油田 

分 类 号：TE348[石油与天然气工程—油气田开发工程]