稠油乳化降粘剂S-5的研制及应用

针对注蒸汽开采稠油油藏过程中存在的问题，研制出耐高温高效稠油乳化降粘剂S-5，并对其提高注汽采油效果进行了研究。结果表明，伴蒸汽注入S-5可明显降低开发初期注汽压力，提高蒸汽驱替效率，降低产出液中含水量，提高注汽周期的产油量及油汽比。将降粘剂S-5用于井筒降粘，可有效提高稠油井产量，解决井筒举升困难的问题。该项技术在胜利油田和大港油田推广应用后，取得了良好的经济效益。

Preparation and Application of Emulsifying Viscosity Reducer S-5 in Heavy Oil

An emulsifying viscosity reducer with heat resistance and high efficiency in heavy oil was prepared to resolve the problems in prodution of heavy oil by steam injection.Its efficiency of steam injection was researched.The result showed that when steam injection was accompanied by viscosity reducer S - 5, the pressure of steam injection was reduced in development primary stage, the steam displacement efficiency was increased, water content in produced fluid was reduced,oil production and oil/steam ratio was increased.When using the viscosity reducer,the oil production of heavy oil well was increased and difficulty of well bore raising was solved. It had good economic benefit after viscosity reducer S - 5 was applied in Shengli Oilfield and Dagang Oilfield.