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 geo-logical 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 pro-duction 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.
关键词
多层合采气井/产能差异/物质平衡方程/产量劈分/数值模拟
Key words
multi-layer commingled gas well/productivity differences/material balance equation/production split-ting/numerical simulation
维普
万方数据