residual volume

The remaining gas distribution is reconsidered through fine gas pool numerical simulation.

在精细研究的基础上,通过精细气藏数值模拟方法对气藏剩余气的分布进行了重新认识。

After the dry gas reservoir with low and extremely-low permeability,but without identified edged and bottom water has been produced for a period,the formation pressure of different areas decreases inhomogeneously,while the gas saturation (S g) changes slightly,which can not be used to describe accurately the distribution of remaining gas.

低渗特低渗、无明显边、底水的异常高压干气气藏开采一段时间后 ,储层中不同区域的地层压力下降不均衡 ,但含气饱和度 (Sg)却相差不大 ,用含气饱和度无法准确地描述气藏剩余气的分布状况。

Through integrated study of gas reservoir engineering, producing state of resources in Huagou gas field are clearly known, and production characteristics, factors influencing recovery factor and distribution features of remaining gas are analyzed.

在分析气藏的开采特征、影响采收率的因素和剩余气分布特点的基础上 ,指出了挖潜方向和提高采收率的主要途径 ,包括 :①针对不同的气藏驱动类型采取不同技术措施 ;②合理配产 ,既充分发挥气藏的生产能力 ,又避免底水过早大幅度锥进、破坏储集层结构 ;③底水气藏投产时适当提高气层的射孔底界 ,充分利用层内或层间夹层 ;④采用先期防砂等先进的采气工艺技术 ,并重视开发全过程的气层保护 ;⑤开发中后期采用化学排水等排水措施及增压采气工艺措施 ;⑥强化科学管理 ,充分运用现代化的管理方法。