不同煤阶煤层气藏伤害机理研究

Study on the Techanism of Damage of the Different Rank of Coalbed Methane Reservoir

煤阶对煤层气藏性质的影响极为明显,煤层气藏性质的差异往往与煤层气藏破坏机理有关。文章通过不同煤阶煤层气藏的煤岩强度、孔隙度、渗透率以及吸附性等性能对比研究,并对煤层气藏伤害机理进行总结归纳为应力伤害、化学伤害和水锁伤害,并据此提出对不同煤阶煤层气藏伤害机理的看法。

The rank of coal make a big difference on the properties of coal reservoirs, the differences of coal reservoirs often have something to do with the mechanism of damage on coalbed reservoir. Through a comparative study of coal and rock strength, porosity, permeability and adsorption properties of different rank of coalbed reservoirs, and summarize the reservoir damage mechanism for the stress injury, chemical damage and water locking damage, and accordingly put forward oppinons on the mechanism of damage on different rank coalbed methane reservoir.