Identification of Collector Properties of Relaxational-deformable Gas Stratum Based on the Development History Data

Abstract

Improvement of efficiency of oil and gas reservoir development is directly connected with the reliability of the implemented development project, characterized by its full adequacy to the reservoir conditions. Such adequacy in designing the development of oil and gas reservoirs is most often ensured by providing comprehensive informativeness of the implemented reservoir hydrogasdynamic model, even with insufficient information about the physical and geological characteristics of the model. Due to the great diversity of these characteristics that directly affect development indicators, and the need to know them during the reservoir development process, the said adequacy of the implemented development project is established by using the effective algorithms, which maximally take into account these aspects of providing comprehensive informativeness of the implemented reservoir hydrogasdynamic model, one of which is the identification algorithm. The implementation of this algorithm can identify the physical and geological characteristics of the reservoir system hydrogasdynamic model being implemented, using the reservoir development data for the previous periods (according to the development history). In view of the above, the article proposes a method for identification of filtration-capacitative parameters of the relaxation-deformed reservoir based on the model of real gas filtration in the gas mode, using data from the development history. This technique makes it possible to simulate changes (to carry out identified determination) of permeability and porosity in all points of the relaxation-deformable gas reservoir, as well as to obtain a corresponding gas-dynamic predictive model of development.