摘要
对于低渗透油气藏,由于其储层压力低,或者高压低渗等特点,大部分井射孔后或压裂后都不能够依靠地层能量实现持续自喷。为了避免损害储层,诱导自喷,需及时排出井筒积液。由于产量低,必须采用低成本、易操作的排液工艺。经过多年的研究,已开发出抽汲排液技术、水力泵排液技术、注液氮诱喷技术等。介绍了这些技术的原理和特点,为合理选择排液技术,实现安全、环保、经济地开发低渗透油气藏提供指导。
Due to its small pores,fine throats,low permeability,and high capillary pressure,most wells in reservoirs with low formation pressure and low permeability can not produce by their own energy. If the intrusive foreign fluid can not be drained out timely,it will deepen the damage to the reservoir and reduce the percolating capacity. Therefore,how to discharge wellbore fluids quickly becomes an extremely important issue. To solve the problem, we have to apply draining techniques with low cost and easy operation,considering the total cost. A number of draining techniques such as swabbing,jet pump drainage and liquid nitrogen drainage have been developed over the years with their own advantages. In this paper, a discussion was made on the advantages and disadvanta- ges of draining techniques currently used in China and an instruction on the choosing of such tech niques was made as well in the development process of low permeability oil fields.
出处
《石油矿场机械》
2013年第4期78-82,共5页
Oil Field Equipment
关键词
低渗透油气藏
排水采油
技术
low permeability pools
drainage oil recovery
technique
