Blockage ofcoal seams by fracturing fluids (FFs) and swellingofcoal matrix owing to FF adsorption are discussed and considered to be the basic factors for coalbed permeability damage.
讨论了伤害煤层渗透率的两大因素:压裂液堵塞煤层割理; 煤基质吸附压裂液而膨胀。
2
An effective stress calculation formula for coal containing gas is proposed coupling with the swelling stress of gas adsorption in the effective stress principle for porous media.
首先在多孔介质的有效应力原理中引入瓦斯吸附的膨胀应力,推导出了适用于含瓦斯煤岩的有效应力计算公式。
3
Simulations based on hypothetical cases were conducted to evaluate the impact of the coalswelling on CO2 injectivity and methane recovery.