Single well controlled reserves of offshore oilfields are very large.Sometimes one or two wells are adopted for the development control of the reserves of a certain block.It is of great significance for directing the oilfield adjustment work to know the actual conditions of the single well controlled reserves.Generally,the single well controlled reserves of a well are determined by such methods as volumetric method,well test method and numerical simulation method.However, Single well controlled reserves of offshore oilfields are very large. One or two wells are adopted for the development control of the reserves of a certain block. It is of great significance for directing the oilfield adjustment work to know the actual conditions of the single well. controlled reserves. Generally, the single well controlled reserves of a well are determined by such methods as volumetric method, well test method and numerical simulation method. However,