盐岩水压致裂溶解耦合数学模型与数值模拟  

The coupled mathematical model and numerical simulation of hydraulic fracturing and dissolving in rock salt

作　　者：梁卫国[1] 赵阳升[1] 李志萍[1] 

机构地区：[1]太原理工大学采矿研究所,山西太原030024

出　　处：《岩土工程学报》2003年第4期427-430,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50174040)

摘　　要：在建立岩盐水压致裂、溶解、固-流-传质耦合数学模型的基础上,对其进行了相应的数值模拟。数值模拟结果表明,在水力压裂过程中,岩盐水力裂缝呈扇形张开,其裂缝宽度与离开注水井口的距离及时间成非线性关系;随裂缝的扩展及裂缝宽度的变化,裂缝中压力在逐步降低同时向缝尖转移,同时裂缝具有阶段性扩展的特征;在压裂过程中,井口压力的实测结果与数值模拟结果吻合较好。On the basis of coupled mathematical model constituting of hydraulic fracture and solution as well as solidfluidmass transfer, the corresponding numerical simulation are carried out in this paper. The results of numerical simulations indicate that the crack in rock salt is opened like the shape of sector during fracturing,and the relation among crack width , distance and time is nonlinear. The pressure distributed in the crack is transferred towards the tine of crack step by step, meanwhile it is gradually decreasing with the crack expanding. It is also found that both the simulated and the tested results well agree with each other.

关 键 词：岩盐 水力压裂 溶解 固-流-传质耦合 数学模型 数值模拟 

分 类 号：TD803[矿业工程—矿山开采] O242.1[理学—计算数学]