煤田地质与勘探2017，Vol.45Issue(1)：62-66,5.DOI:10.3969/j.issn.1001-1986.2017.01.012
变渗透率条件下煤层气井的产能预测
Prediction of CBM well productivity under variable permeability
冯青 1陶洪华 2黄子俊 1杨浩 1杨兵 1曾鸣 1樊爱彬1
作者信息
- 1. 中海油田服务股份有限公司油田生产研究院,天津 300450
- 2. 国土资源部页岩气资源勘查重点实验室,重庆 400042
- 折叠
摘要
Abstract
The accumulation characteristics and the percolation mechanism of CBM reservoir are different from those of conventional sandstone gas reservoir,resulting in big difficuty in productivity evaluation. The conclusion of investigation indicated that all previous researches have used material balance method or numerical simulation to predict the produc-tivity. This paper builds up binomial deliverability model under the effects of turbulence by introdicing matrix shrinkage of multi-components of CBM, applied and analized the model in actual single well. The research results prove that coal reservoir permeability is affected by stress deformation and matrix shrinkage, decreases at beginning and increases later. And coalbed permeability recovery will be weakened more with higher impure content. Actual application demonstrated that productivity model for variable permeability can interpret well test data that conventional methods can't explain, the interpretation results can precisely assess the productivity of a CBM well.关键词
煤层气井/应力形变/基质收缩效应/变渗透率/产能模型Key words
CBM well/stress deformation/matrix shrinkage effects/variable permeability/productivity model分类
天文与地球科学引用本文复制引用
冯青,陶洪华,黄子俊,杨浩,杨兵,曾鸣,樊爱彬..变渗透率条件下煤层气井的产能预测[J].煤田地质与勘探,2017,45(1):62-66,5.
