Evaluation method of gas well dynamic reserves in low permeability gas reservoir based on big data analysis

Abstract

The evaluation of gas well dynamic reserves is the basis of gas reservoir development potential analysis, technical policy-making, economic benefit evaluation. The low permeability gas reservoir has a small percolation capacity, long pressure recovery time and limited formation pressure test data, which bring great difficulties to the evaluation of gas well dynamic reserves. Based on the development practice data of more than 1000 gas wells and over 20 years of M gas field in ordos basin, the relationship model between dynamic reserves of gas wells, casing pressure and cumulative gas production volume was established through big data analysis, to quickly evaluate the dynamic reserves of gas wells in low-permeability gas reservoirs using conventional production data. The production practice of the M low permeability gas field shows that this method can effectively improve the number and accuracy of dynamic reserves evaluation wells