水锁损害是低渗透气藏气体渗流的固有特性，它严重影响气藏的勘探与开发。储层地质参数是影响水锁损害程度的主要因素，而低渗透气藏储层非均质性强，储层地质参数组合变化万千，准确预测储层的水锁损害程度十分困难。文中以鄂尔多斯盆地某低渗透气藏为例，优选反映气藏储层的岩性、物性、胶结物类型、微观孔隙结构4 类性质的12 个参数构成二级模糊多目标综合评判的因素集（不同的水锁损害程度构成评判集），运用模糊互补判断矩阵确定各因素的权重,利用岭形函数确定综合判断矩阵，从而构建二级多目标综合评判。结果表明：4 块岩心的评判结论与实验室测试结果完全一致，证明了建立多目标综合评判方法的准确性；在获得了储层岩石的基本参数之后，通过建立适合该气藏的多目标综合评判，可以准确预测水锁损害强度，从而大幅度减少气水两相渗流实验工作量，节约成本，并指导气藏工作制度及采气工艺设计，优化气藏的开发效果。

Water lock generally exists in low permeability gas reservoir and seriously affects the exploration and development of gas reservoir. Reservoir parameter is the most important factor which affects the degree of water lock damage. However, accurate prediction of the degree of water lock damage is difficult because of the reservoir heterogeneity. 12 parameters which can reflect 4 different kinds of reservoir features including lithology, physical properties, cement type and micro-pore structure in a low permeability gas reservoir in Ordos Basin are optimized to build up the element anthology for the fuzzy multi-objective comprehensive evaluation. Different degrees of water lock damage build up the remark anthology. Complementary judgement matrix is used to determine the weight of factors, then ridge-shaped distribution function is used to define the comprehensive evaluation matrix, finally the second-order multi-objective comprehensive evaluation is formed. The evaluation results of 4 cores are consistent with laboratory test results, so the comprehensive evaluation method is accurate and valid. Based on the basic parameters of reservoir rocks, the appropriate evaluation method can be used to accurately predict the degree of water lock damage. So, the workload of gas-water flow experiments will be drastically reduced, cost will be saved, and the working system and production technology for the gas reservoir can be optimized.