基于VB和HYSYS的地下储气库地面井筒一体化压力计算系统

The VB-and HYSYS-based simulation integration of injection/withdrawal wellbore pressures with above-ground piping pressures in UGS facilities

已有HYSYS软件本身没有井筒模块,不能在HYSYS中实现对地下储气库注采气井筒部分压力系统的模拟。为此,通过分析地下储气库注采气井井筒压力传递机理,建立了井筒压力计算数学模型;在此基础上,基于VB软件开发平台,利用HYSYS模拟软件的Extension模块扩展功能,将地下储气库注采气井井筒压力传递模型嵌入HYSYS新的单元模块,由此可方便地实现注采气井井口压力与井底压力之间的数值关联计算与压力模拟传递,并且在HYSYS的PFD模拟流程图中可以直接调用扩展开发的井筒模型。仿真计算结果表明,采用开发出的井筒压力传递模块模拟计算出的压力数据与实测数据偏差很小,能满足现场模拟计算的需求。此外,基于VB与HYSYS模拟平台对地下储气库注采气井井筒模块的成功开发使得地下储气库地面井筒压力模拟更加便捷,操作过程简化,实现了地下储气库地面管网压力系统与注采井筒压力系统的一体化模拟。

Without the wellbore module, the HYSYS failed to simulate the injection/withdrawal wellbore pressures of underground gas storage （UGS） facilities. To this end, a mathematical model was first built for the injection/withdrawal wellbore pressures based on the propagation mechanism of such pressures. Then, on the VB software development platform, with aid of the function of Ex tension module expansion in the HYSYS simulation software, the above mathematical model was embedded as a new unit module in- to the HYSYS software. This will not only be convenient to achieve the numerical correlation calculation between wellhead and bot- tomhole pressures as well as the simulation of pressure transmission, but be easy to directly call the wellbore model from the HYSYS simulation process flowchart diagram （PFD）. The simulation results showed that the calculated pressure data almost agrees well with the measured ones and this developed wellbore pressure module can meet the site simulation requirement. Additionally, this study makes the simulation of wellbore pressures much more convenient with a simpler operation process, thereby to achieve the integration of the simulation of above-ground piping pressures with injection/withdrawal wellbore pressures in UGS facilities.