杏子川油田DC区块防腐工艺研究与应用  

Research and application of anti-corrosion technology in DC Block of Xingzichuan Oilfield

作　　者：刘通 赵亚杰 黄华 董涛 刘景峰[2] 金松 

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075 [2]延长油田股份有限公司勘探开发技术研究中心,陕西延安716001 [3]中国石油华北石化分公司,河北任丘062552

出　　处：《石油钻采工艺》2014年第4期112-115,共4页Oil Drilling & Production Technology

摘　　要：为了解决杏子川油田DC区块油井管杆腐蚀严重的问题,通过现场调研和取样化验分析,发现DC区块油井管杆腐蚀主要原因是CO2、H2S和细菌共同作用。结合DC区块油井管杆腐蚀的原因,室内研制了低膦型固体防腐阻垢剂,优选了除硫剂、二氧化碳中和剂、杀菌剂等助剂,从而确定缓蚀阻垢体系配方,然后将其干燥、固化制得固体缓蚀阻垢管。在杏子川油田DC区块进行了5口井的现场应用,措施后油井采出液平均腐蚀速率由0.682 mm/a降至0.05 mm/a,总铁离子含量由2.4 mg/L降至0.4 mg/L,油井平均免修期由41 d提高到210 d。现场应用表明,该固体缓蚀阻垢管能够改善杏子川油田油井管杆腐蚀状况,延长油井管杆的使用寿命,减少油井维护性作业井次。In order to address the problem of severe corrosion of pipes and rods in oil wells in DC Block of Xingzichuan Oilfield,it is found that, through field investigation and sampling test, the main reason for corrosion of pipes and rods in oil wells in DC Block isthe coaction of CO2, H2S and bacteria. In view of this main reason for such corrosion, the author developed the low-phosphonic solid corrosioninhibitor was developed through Lab experiments, optimized such additives as sulfur scavenger, CO2 neutralizer and bactericide,hence determined the formula of corrosion and scale inhibitor system; then dried and solidified the agents to obtain the solid corrosion/scale inhibiting tube. The tube was used in five wells in DC Block; the average corrosion rate of the produced fluid from the oil wellswas reduced from 0.682 mm/a to 0.050 mm/a, and the total iron content was reduced from 2.4 mg/L to 0.4 mg/L, the maintenance-freeperiod of the oil wells increased from 41 days to 210 days. Field application shows that this solid corrosion/scale inhibiting tube caneffectively improve the corrosion of oil well pipes and rods, elongate the service life of the oil well pipes and rods and reduce the timesof downhole services.

关 键 词：杏子川油田 腐蚀 防腐工艺 缓蚀阻垢管 

分 类 号：TE89[石油与天然气工程—油气储运工程]