Multi-thread band matrix solver for well system fluid flow modeling

摘要

In some aspects, techniques and systems for operating a subterranean region model are described. A band matrix that represents well system fluid flow in a subterranean region is accessed. The band matrix includes flow variable coefficients based on governing flow equations for the well system fluid flow. A first elimination is performed on an upper part of the band matrix. The upper part of the band matrix includes a first subset of the flow variable coefficients corresponding to a first subset of flow variables. In parallel with the first elimination, a second elimination is performed on a lower part of the band matrix. The lower part of the band matrix includes a second subset of flow variable coefficients corresponding to a second subset of the flow variables. An intermediate part of the band matrix can be solved. The intermediate part of the band matrix includes other flow variable coefficients.