Production Splitting Method of Early Gas Well Development Based on Productivity Difference

doi:10.3969/j.issn.1006-6535.2024.06.012

Abstract

Abstract: Gas production serves as the fundamental parameter for assessing the output of each production layer in multi-layer commingled gas wells.To address the issue of inaccurate production splitting in multi-layer commingled gas wells,based on the gas layer productivity difference and material balance principle,according to reservoir geological parameters and production dynamic data,the production splitting of gas wells during the unstable flow stage is carried out,and an early production splitting method of multi-layer commingled gas wells based on productivity difference is formed.Taking two-layer commingled wells as an example,a numerical model is established to verify the accuracy of the method.The results indicate that the relative error of the calculation results of the production splitting method based on the productivity difference is less than 5% in comparison with the numerical simulation method for the gas wells that have been in production for 5 years,and the accuracy is higher.Compared with the KH method which merely considers the static parameters,the calculation accuracy of this method has been significantly improved.Due to the error accumulation effect,this method is not applicable for long-term prediction.The early production splitting method of gas well development based on productivity difference can promptly obtain the production of each layer of early development,which provides a novel calculation concept for the accurate splitting of gas well production.

Key words: multi-layer commingled gas well, productivity differences, material balance equation, production splitting, numerical simulation

CLC Number:

TE312

Gan Wenjie, Ji Lidong, Yuan Quan, Liu Ronghe, Wang Yongqiang, Zhang Qian, Wang Yukun. Production Splitting Method of Early Gas Well Development Based on Productivity Difference[J]. Special Oil & Gas Reservoirs, 2024, 31(6): 100-105.

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