摘要
海上油田酸化过程中存在着管柱及电缆腐蚀,残酸返排液处理成本高,残酸导致原油乳化从而使得原油脱水困难等一系列问题,严重影响了油田的正常生产和经济效益。用新型有机酸SW-A酸有针对性地解决了海上油田酸化中存在的这些难题。室内溶蚀实验评价结果表明,SW-A酸对岩心粉的最终溶蚀率达到20.575%,可有效提高渗透率26%左右。SW-A酸与岩心反应缓慢,在有效提高油藏渗透率的同时还可用于深部酸化作业。通过对SW-A酸的静态腐蚀实验得到其对管柱和设备的腐蚀程度仅约为1.4g/(m2.h),具有较好的Fe3+稳定能力;从破乳实验可以得知SW-A酸不会导致原油乳化,对原油脱水几乎无影响。
A new organic acid, SW-A acid with phytic acid as the matrix liquid, was used in acidification for offshore oilfields, which could improve corrosion protection of the cables and pipelines, and treatment of acid flow-back which would lead to crude oil emulsification and the dehydration difficulty. According to the dissolution experiments, the ultimate dissolution percentage of the core powder was 20.57% （w） and the permeability of the core was improved by 26% by using SW-A acid. Because the reaction between SW-A acid and the core was slow, SW-A acid could be used in the acidification in the depths of the offshore oilfields. The captive corrosion test revealed that the corrosion degree of SW-A acid to the pipelines was only about 1.4 g/（ m2·h ） and it could maintain the stability of Fe3＋. The demulsification experiment showed that SW-A acid wouldn＇ t lead to the crude oil emulsification and affect its dehydration.
出处
《石油化工》
CAS
CSCD
北大核心
2011年第7期770-774,共5页
Petrochemical Technology
关键词
油田酸化
残酸返排
溶蚀实验
破乳
有机酸
acidification in offshore oilfield
acid flow-back
corrosion experiment
demulsification
organic acid
