石油化工高等学校学报2018，Vol.31Issue(2)：53-60,8.DOI:10.3969/j.issn.1006-396X.2018.02.010
吉林油田某凝析气藏区块水锁损害评价及解锁研究
Water Locking Damage Evaluation and Unlocking of Condensate Gas Reservoir in Jilin Oilfield
摘要
Abstract
Water lock damage is one of the main damage ways in low porosity and low permeability oil and gas fields,seriously affecting the normal exploitation of oil and gas fields.In order to find out the main factors affecting the water lock effect and effective methods to remove water lock damage,the variation of gas permeability before and after the reservoir core water lock was studied and the degree of water lock of rock samples was quantitatively evaluated using the rock samples from the condensate gas reservoir in Jilin oilfield as raw materials,through the indoor water lock damage experiment of reservoir core.The results showed that water lock effect was mainly caused by the water saturation,pore throat radius,the water-sensitive illite,Yimeng mixed layer in the clay minerals with high content and hair and tufted convex.On this basis,the effect of methanol,slippery water and N2 injection on water lock damage was evaluated.It is proved that N2 unlocking effect is the best,permeability can be restored to about 30％ of the original,methanol injection unlocking effect is better than sliver water,and the best amount of alcohol injection is 0.4 PV.关键词
低渗凝析气藏/水锁/损害程度/解锁Key words
Low permeability condensate gas reservoir/Water lock/Degree of damage/Unlocking分类
能源科技引用本文复制引用
赵法军,田哲熙,张宇飞,张新宇,安毅..吉林油田某凝析气藏区块水锁损害评价及解锁研究[J].石油化工高等学校学报,2018,31(2):53-60,8.基金项目
十三五国家重大专项(2016ZX05055-006) （2016ZX05055-006）
十三五国家重大专项(23016ZX05012-001) （23016ZX05012-001）
黑龙江省自然科学基金(E2015036). （E2015036）
