钻井液与完井液2017，Vol.34Issue(6)：41-45,5.DOI:10.3969/j.issn.1001-5620.2017.06.008
基于致密砂岩气藏初始含水饱和度的水锁伤害评价
Permeability Impairment by Water Block in Tight Sandstone Gas Reservoirs with Initial Water Saturation
摘要
Abstract
A vacuum saturation method has been worked out to evaluate permeability impairment by water block of cores (with initial water saturation).This method is established to replace traditional methods which are not suitable for the evaluation of permeability impairment by water block of cores taken from tight gas reservoirs.Laboratorystudies of a polymer sulfonate drilling fluid have been done on cores taken from Tarim Basin with the method developed.Permeability impairment of cores by water block before and after mud contamination was measured with gas flowing through the cores.The new method,giving a result that better tallies with the reality of a gas reservoir,can be used to make a comparison between the gas permeability of a core with initial water saturation and the gas permeability of the same core with bound water saturation.A procedure of setting lower initial water saturation of tight gas reservoir was established for the method.Further experiments have been done to study the effects of time for vacuum saturation,time for backflow after gas flooding and flowrate of gas flooding etc.on the vacuum saturation method.Permeability impairment of tight cores by polymer sulfonate drilling fluids used in Tarim Basin tested with the method developed is between 54.83％ and 72.73％.关键词
储层伤害/伤害程度评价/致密气藏/抽真空饱和/水锁伤害Key words
Reservoir damage/Evaluation of permeability impairment/Tight gas reservoir/Vacuum saturation/Water block分类
能源科技引用本文复制引用
王茜,王双威,唐胜蓝,张洁,张蝶,赵志良..基于致密砂岩气藏初始含水饱和度的水锁伤害评价[J].钻井液与完井液,2017,34(6):41-45,5.基金项目
中国石油天然气股份有限公司塔里木油田分公司项目“高温高压致密储层损害评价方法(标准)调研与研究”(201015120215),国家科技重大专项课题“库车坳陷深层-超深层天然气田开发示范工程”(2016ZX05051-003). （标准）
