Abstract
This paper focuses on developing a simulation model for the analysis of natural gas gathering pipeline network system. The simulation mathematical model of the pipeline element and non-pipeline element in natural gas pipeline network is established, the implicit difference method is used to change the partial differential model into the finite difference equations. In order to determine the unknown pressure and flow parameters, the Newton–Raphson solution technique is applied to solve the model. The simulation model is used to analyze the pipeline network in a gas field. The result simulated comparing with the actual parameter showed that the developed simulation model enabled to determine the parameters with less than 5% relative error. And we can see from the simulation results that: the pressure in each pipeline does not exceed the allowable pressure, the pressure drop is small in the pipeline network, and the flow in part of pipeline is very small. Therefore, we can adjust the gas transmission scheme, and increase the gas transmission volume properly.
Highlights
The gas gathering and transportation system is consists of gas gathering pipeline networks of the field, gas transmission pipelines and gas distribution networks, which combines gas gathering, gas purification, gas storage and gas distribution
Because of the compressibility of the gas, the unsteady flow of natural gas in the pipeline is a slow transient process which is different from liquids, the requirement on time step is not strict when using center implicit difference method, it is convergent at any time step
The input flow of each gas source and pressure of user are obtained through simulation analysis, Table 2 shows that the minimum pressure of pipeline network is 2.9782MPa, the maximum flow of intake point is 136104 m3/d, the pressure in each pipeline does not exceed the allowable pressure, the pressure drop is small in the pipeline network, so the utilization is
Summary
The gas gathering and transportation system is consists of gas gathering pipeline networks of the field, gas transmission pipelines and gas distribution networks, which combines gas gathering, gas purification, gas storage and gas distribution. This paper followed the second approach, which using the implicit difference method to solve the simulation model.
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