Expansion of decline curve parameters for tight gas sands with massive hydraulic fractures

摘要

with the advances in modern hydrocarbon technology and expansion of geologic settings for development, it is necessary to make changes to the conventional wishoms that accompany production technology. This paper discusses some possible changes that necessitate implementation as observed botyh empirically and analytically. Specifically it discusses the time at which a decline curve can be impleneted for production forecasting, the need for a dual decline model, and the severity of the decline variable that may be used for this model. It is the point of this paper to prove that for tight gas sands with massive hydraulic fractures that itis not only feasible to use decline variables that are greater than the traditional limit of harmonic or 1.0, but that the decline curve may also be implemented in the transient flow period of the well and decline both hydrbolically and exponentially. These ideas were not only proven through field study, but were additionally modeled with a fracture flow simulator.