Computational studies of hydrotoparaffin plugs in wells

• Published in: Journal of Physics: Conference Series
• Main Author: Izmaylova, G R
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2021
• Subjects: permafrost; Siberia
• Online Access: http://dx.doi.org/10.1088/1742-6596/2142/1/012008; https://iopscience.iop.org/article/10.1088/1742-6596/2142/1/012008; https://iopscience.iop.org/article/10.1088/1742-6596/2142/1/012008/pdf

Abstract In Western Siberia and the Far North, complications caused by paraffin plugs in wells are not temporary. They are caused by ongoing factors, such as permafrost zones, a sharp temperature drop along the well, the high gas factor and water in the well products. The paper studies the possibility of using a high-frequency electromagnetic field to remove paraffin plugs inside the well. Mathematical modeling of the problem using a system of heat and mass transfer equations and boundary and initial conditions is described. The phase transition (melting of hydratoparaffin) is denoted by Stefan’s condition which is one of the boundary conditions. The problem does not have an analytical solution, so the numerical implementation of the solution is carried out. Graphs of dependences of melting limits on generator power, and distribution of temperature fields in wells are constructed.