摘要
针对低渗、特低渗的岩样洗油质量不能保证这一问题,对样品的选择、溶剂的选择以及溶剂中含油和饱和烃随时间的变化进行研究。洗油时间过长,可能会造成岩心的伤害,使岩心孔隙内的粘土疏松,所测的数值不能反映储层的真实值。高沸点的有机溶剂可以加快洗油速度,缩短洗油时间,提高洗油效率;长庆油田最佳洗油时间为75h。
The cleaning quality of low and extra-low permeability samples is not always within guarantee. This paper studies sample and solvent selection and the change of saturated hydrocarbon in the solvent with time. Long cleaning time may result in core damage, unconsolidated clay in pores, and the measured data can not reflect the reality of reservoir. Organic solvent with high boiling point can accelerate cleaning speed, reduce cleaning time, and improve cleaning efficiency. The optimum cleaning time of Changqing oilfield is 75 h.
出处
《特种油气藏》
CAS
CSCD
2005年第3期86-87,90,111,共4页
Special Oil & Gas Reservoirs
基金
本文系长庆油田分公司"西峰长庆油田分公司项目区长8
白豹长3及王窑长6储层特征对油田开发的影响分析"(编号:KFSY-4)的部分内容
关键词
洗油时间
低渗特低渗储层
孔隙度
溶剂
长庆油田
cleaning time
low and extra-low permeability reservoir
porosity
solvent
Changqing oilfield
