摘要
低渗透气藏普遍存在水锁现象。理论研究表明,由于毛细管的作用,在常压下,即使与地层配伍的,也会产生自吸,从而造成伤害。采用岩心的自吸水现象,用模拟地层水使岩心造成伤害,根据侵入量的大小,来评价地层的水锁伤害大小,并应用前人的理论,评价甲醇和石油磺酸盐对岩心水锁的解除效果。
Low permeability gas reservoir water phase trapping phenomenon is prevalence, theoretical research shows that due to capillary effect,the atmospheric pressure,even if compatible with the reservoir,and also have self-absorption,causing injury.In this paper, since the phenomenon of self-absorption in core,using a formation water to core damage, according to their size into the volume to assess the size of water phase trapping damage in reservoir,and application of previous theory,evaluate the effect of methanol and petroleum surfactant on the relieving water phase trapping.
出处
《石油化工应用》
CAS
2010年第10期14-17,共4页
Petrochemical Industry Application
关键词
气藏
自吸
水锁伤害
解除措施
gas reservoir
suction
water phase trapping damage
relieving measures
