疏松砂岩气藏高束缚水储层微粒运移实验评价

The Particles Migration Experiment Evaluation of Loose Sandstone Gas Reservoir With High Irreducible Water

微粒运移是伤害疏松砂岩气藏储层的主要因素之一。利用南海西部X气田高束缚水储层岩心颗粒进行填砂管实验,比较在不含水和含水条件下的储层微粒运移状况。结果表明:相同渗透率级别下,干岩心微粒运移程度较弱,而含水岩心微粒运移程度较强。X气田的生产动态资料表明,开发后期储层微粒运移伤害明显,导致气井产量递减,这与实验结果基本一致。疏松砂岩高束缚水储层微粒运移评价实验应基于含水岩心进行,在此基础上开展相关储层保护工作。

The particle migration in loose sandstone gas reservoir is one of the main reservoir-damaging factors.Sand filling pipe experiments are carried out with the core particles of high irreducible water reservoir in X gas field,western South China Sea,to compare the migration status of reservoir particles under the conditions of dry core and core with irreducible water.The experimental results show that under the same level of permeability,the results in the dry core is weak,but it is obvious with the high irreducible water.X gas field production performance shows that reservoir damage is apparent in the late development,and cause the gas well production to decline,which is basically consistent with the experimental results.So this paper suggests that the particle migration experiment should be carried out with the core with irreducible water in loose sandstone gas reservoir;then,the reservoir protection work should be taken on the basis.