低压水敏储层清防蜡技术

Study on Paraffin Clean and Control Technology in Low-Pressure Water-Sensitive Reservoir

关键词:  清防蜡  声波防蜡  微生物防蜡  磁防蜡

Key words:  paraffin clean  paraffin control  sonic wave paraffin control  microbial paraffin control  magnetic paraffin control

摘要:

介绍了为解决低压水敏储层油井结蜡所开展的声波防蜡、微生物防蜡、磁防蜡技术的研究及应用。在对原油性质及储层特征进行研究的基础上,对油田常规热洗清蜡工艺进行了分析,提出了常规热洗清蜡工艺在解决低压水敏储层油井结蜡中存在的问题。通过几年的研究与应用,优选出适用于低压水敏储层油井的清防蜡工艺,确定了各清防蜡技术的技术界限。清防蜡新工艺与油井检泵周期结合,不仅达到杜绝储层污染、防止油井结蜡、保证油井稳定生产的目的,而且防蜡不影响油井正常生产,提高了油井生产时率、降低了油井清防蜡成本,提高了油田开发效率。现场共实施各种清防蜡措施456井次,减少热洗4256井次,节约热洗费用1414万元,创造经济效益1239万元,投入产出比达到1∶3。

Abstract:

The sonic wave paraffin control technology,microbial paraffin control technology and magnetic paraffin control technology are studied and used in oil wells in low-pressure and water-sensitive reservoir.By studying on crude oil’s physical property and reservoir characteristics,heat cleaning paraffin technology and existed problems are analyzed and discussed when it is used to clean paraffin in low-pressure and water-sensitive reservoir.By study and application in several years,new clean and control paraffin technologies used in low-pressure and water-sensitive reservoir are found.The new technologies are not only prevent the reservoir from polluting,control wells paraffin deposition,make the wells produce steadily,but also improve the production rate,reduce the cost and produce with high efficiency.In the oilfield,the technologies are used in 456 wells and good results are achieved.The income 12.39 million RMB is reached and input-output is 3:1.