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低渗气藏是在我国能源中占有很大的成分,成为我国能源开发的重要领域之一。然而,在开发过程中,低渗气藏存在着严重的储层损害问题,造成气井产能下降。水锁伤害是气井储层伤害的主要方式之一,严重影响的低渗气藏的开发。本文通过室内实验对苏6井区低渗气藏的水锁伤害进行了评价。结果表明,水锁伤害程度与束缚水饱和度呈现出来明显的正相关性,即随着束缚水饱和度的增加,水锁伤害的程度加剧;储层孔隙度与伤害程度呈现出的相关性不强,但可以看出有一定的负相关性;渗透率与水锁伤害程度也呈现出明显的负相关性。
Low-permeability gas reservoirs occupy a large part of China’s energy and become one of the important fields for energy development in our country. However, in the development process, the low-permeability gas reservoirs have serious reservoir damage problems, resulting in the decrease of gas well productivity. Water lock damage is one of the main ways of gas reservoir damage, which seriously affects the development of low-permeability gas reservoirs. In this paper, water lock damage of low permeability gas reservoir in Su 6 well is evaluated through laboratory experiments. The results show that the degree of water damage is positively correlated with the irreducible water saturation, that is, as the irreducible water saturation increases, the degree of water lock damage aggravates. The correlation between reservoir porosity and injury degree is not But it can be seen that there is a certain negative correlation; permeability and water lock damage also showed a significant negative correlation.