Shale gas well production fitting and prediction method

Abstract

The invention relates to a shale gas well production fitting and prediction method, which belongs to the field of shale gas well productivity evaluation, and solves the problems that shale gas well production prediction errors are large, the process is tedious and the like at present. The shale gas well production fitting and prediction method is characterized by comprising the following steps of:dividing a shale gas reservoir into a fracture system and a matrix system; simultaneously establishing a productivity equation and a material balance equation of the fracture system and the matrix system; carrying out production history fitting on flowing bottomhole pressure and water yield for two production modes of fixed yield and fixed pressure of a shale gas well; and respectively predictingthe gas yield and the water yield of the shale gas well under the two production modes of the fixed yield and the fixed pressure after the fitting is successful. The shale gas well production fittingand prediction method is good in fitting effect, high in prediction precision and high in generalizability.

Description

technical field [0001] The invention relates to a shale gas well production fitting and prediction method, which belongs to the field of productivity evaluation of shale gas wells. Background technique [0002] Under the current situation where the contradiction between international energy supply and demand is becoming increasingly prominent, the effective exploitation of new energy is of great significance to the national strategic deployment. As a new unconventional energy, shale gas, especially after the successful development of North American countries, has attracted a lot of attention from all over the world. s concern. With the continuous development of domestic shale gas reservoirs and the deepening of field experience and theoretical research, it is becoming more and more important to clarify the productivity of shale gas wells and predict the production of shale gas wells. [0003] After extensive research, the patent No. CN201811482058.9 "Shale Gas Well Producti...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the problems of large production prediction error and cumbersome process of shale gas wells, the present invention combines the productivity equation and material balance equation of the fracture system and the matrix system, and has two kinds of constant production and constant pressure for shale gas wells. The production model is used for production history fitting and production forecasting, the fitting effect is good, and the scalability is strong

Images