特种油气藏2017，Vol.24Issue(4)：78-82,5.DOI:10.3969/j.issn.1006-6535.2017.04.014
页岩气藏三重介质窜流参数分析
Interporosity Flow Coefficient Analysis for a Triple-porosity Shale Gas Reservoir
摘要
Abstract
A triple-porosity model is built including matrix,natural fractures and hydraulic fractures to characterize spatial scale variation of a shale gas reservoir. Langmuir equation is used to characterize desorption in matrix,Knud-sen diffusion is characterized by modifying apparent permeability and the mathematical model is solved via fully im-plicit method. The model is used in an individual well production and sensitivity analysis shows that gas recovery rate increases with the increment of matrix-micro fracture interporosity flow coefficient and micro fracture-macro fracture interporosity flow coefficient. While the former one has major influence on production in later stage,the lat-er one has major influence on production in middle and later stage. Field application verified the accuracy of the model. The model is more suitable for the characteristics of shale gas reservoirs and therefore simulates the produc-tivity of shale gas wells more accurately and assists formulating development scheme.关键词
页岩气藏/三重介质数学模型/Knudsen扩散/数值模拟/产能预测Key words
shale gas reservoir/triple-porosity mathematical model/Knudsen diffusion/numerical simulation/productivity prediction分类
能源科技引用本文复制引用
姜瑞忠,张伟,滕文超,乔欣,汪洋..页岩气藏三重介质窜流参数分析[J].特种油气藏,2017,24(4):78-82,5.基金项目
国家自然科学基金"页岩气藏多级压裂水平井流动特征产能评价方法研究"(51374227)和"致密储层体积压裂缝网扩展模拟研究"(51574265)联合资助 （51374227）
