致密砂岩气藏敏感性评价方法研究

Study on Evaluation Method of Sensitivity of Tight Sandstone Gas Reservoirs

采用一种改进的敏感性评价方法分析气藏的敏感性,岩心气测速敏损害为中等偏强,水敏感性为强,没有酸敏感性和碱敏感性。因此从储层保护的角度出发,在注压裂液等外来流体时,一定要注意控制矿化度,尽量与地层水的矿化度相当,否则会对储层造成严重的伤害。

An improved sensitivity evaluation method was used to analyze the sensitivity of gas reservoir.The results showed that the degree of speed-sensitive damage was relatively strong,the water sensitivity was strong,and there was not acid sensitivity and alkali sensitivity.So from the perspective of reservoir protection,when injecting extraneous fluids such as fracturing fluid,its salinity should be controlled strictly(as close as possible to the salinity of the formation water),otherwise it will cause serious damage to reservoir.