A New Method to Determine the Productivity Equation Coefficient of Low Permeability Gas Reservoir

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Yu, Beibei^1 ; Li, Donglin^2 ; Li, Hui^1 ; Li, Qiuyuan^1 ; Yang, Yan^1

Exploration and Development Research Institute of Dagang Oilfield, Binhai New Area, Tianjin

300280, China^1

Oil and Gas Cooperation and Development Company, BHDC, Binhai New area, Tianjin

300280, China^2

关键词: Formation pressure;    Gas well productivities;    Low permeability gas reservoirs;    Material balance equation;    Productivity analysis;    Productivity equation;    Productivity of gas wells;    Single well production;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/4/042095/pdf
DOI  :  10.1088/1755-1315/295/4/042095

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Stress sensitivity exists in the development of low permeability gas reservoir, which leads to the large difference between the productivity of gas well in the middle-late stage and the initial stage. Gas field production usually uses empirical formula to calculate productivity equation coefficient by known well test data or static pressure. However, in actual production, due to economic reasons, well testing cannot be carried out frequently, or interrupted production to obtain the static pressure, so the actual productivity of gas Wells cannot be obtained quickly. This paper combined the material balance equation with binomial productivity equation, and the coefficient of productivity equation is obtained by using the fitting analysis of single well production history data. This method overcomes the dependence of traditional method on formation pressure, and the productivity equation which calculated by this method can reflect the influence of stress sensitivity on gas well productivity, it provides a new method for productivity analysis of low-permeability gas reservoirs.