Dynamic simulation dispatching system for the CBM gathering pipeline network in northern Fanzhuang

The coalbed methane (CBM) in northern Fanzhuang is characterized by low pressure, high density, large topographic undulation and low flow rate. To deal with these characteristics, its gathering pipeline network is complicated with complex structure, sensitive pressure and subtle variation of flow parameters, so its technological analysis and dispatching management are difficult. In this paper, the framework of dynamic simulation dispatching system for the CBM gathering pipeline network in northern Fanzhuang was described with the PNS Pipeline Simulation Software as the core, combined with its 3D geographic information system (GIS), SCADA system and real-time database. Then, the dynamic simulation model, the model selfadaption and online simulation process were illustrated. The interaction between the dynamic simulation and the GIS system was discussed. The methods and process of automatic modelling and dynamic inquiry & display were investigated. It is shown that this dynamic simulation dispatching system can be used to online analyze and track the flow of CBM pipeline network, quantify the operation state of gathering pipeline network, analyze the evaluation index and search, inquire and display intuitively the operation parameters of each part, so as to provide in time the accurate analysis methods and decision basis for the dispatching and management of large-scale complex CBM ground gathering pipeline network and coordinate the decision and implementation of the dispatching programs. The system was applied to the CBM gathering pipeline network of Fan 9 gas gathering station and the flow conditions of the overall system was obtained. It can provide timely and accurate quantified data for the decision of dispatchning management.