Preparation and performance evaluation of emulsifiers for oil-based drilling fluids
Emulsifier of drilling fluid is one of the important chemicals in oil well drilling,and its performance evaluation is of great significance to the success of drilling engineering.Excellent emulsifiers ensure the stability and rheological properties of drilling fluids.When selecting the emulsifier,its physical and chemical properties and the comprehensive proper-ties of the system should be fully considered to ensure the success of the drilling project.In this study,six kinds of emulsifier products were prepared with vegetable oleic acid,di-ethylenetriamine and maleic anhydride as the main raw materials,and their physical and chemical properties and comprehensive properties of the system were evaluated.The experi-mental results show that PF-MOEMUL1,PF-MOCOAT1,PF-MOEMUL2,PF-MOCOAT2 emulsifiers meet all the requirements of the indexes and have good performance in the key indexes of physical and chemical properties evaluation and system comprehensive perfor-mance evaluation,which provides a reliable guarantee for drilling engineering.However,the pour point and plastic viscosity of PF-MOEMUL3 and PF-MOCOAT3 emulsifiers fail to meet the requirements of the index.It may lead to problems such as emulsion instability and poor rheological properties,which will affect the smooth progress of drilling engineering.The performance evaluation of emulsifier for drilling fluid provides an effective reference for the selection and application of emulsifier.
万方数据
维普
