▎ 摘　　要

NOVELTY - The system has a graphene heating module provided with a heat insulating layer, a heating electrode, a protective electrode, a graphene layer and a heat conducting layer. The graphene layer is coated on a surface of the heat conducting layer. Two ends of the graphene layer are provided with the heating electrode. A side of the graphene layer is provided with the protective electrode. The heat insulating layer is covered on a surface of the heat conducting layer containing the graphene layer. The graphene heating modules are combined to form an annular heating belt, which is fixed on an outer wall of an oil pipe. A temperature sensor measuring module is provided with multiple temperature sensor groups that are fixed on an outer wall of the oil pipe at intervals. USE - System for performing temperature difference process underground flow measurement in an oil-gas well. ADVANTAGE - The system performs constant temperature heating and pulse heating on the annular heating belt, which is formed by the graphene heating module that is fixed on the outer wall of the oil pipe, and realizes real-time measurement of temperature at different positions and different directions at an outer side of the pipeline and combined processing of test data of each temperature sensor to realize error correction of a temperature measurement signal, thus improving precision of the temperature-difference process flow test, thus solving a problem that accurate temperature in directions outside the pipeline is not obtained. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for correcting error in a system for performing temperature difference process underground flow measurement in an oil-gas well. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a system for performing temperature difference process underground flow measurement in an oil-gas well. 1Oil pipe 2Graphene heating module 3Circuit module 4Temperature sensor measuring module