【摘要】 在实验研究的基础上 ,分析了渗透率的压力敏感性特征以及低渗透油田开发中存在的压敏效应。随着油田开发过程的进行 ,地层压力逐渐下降 ,进而因油藏压力的降低所诱发的渗透率损失对地层的伤害将不可避免 ,最终导致的渗透率损失对低渗透油田开发的影响是巨大的。研究表明 ,因压敏效应的存在 ,在井壁附近地层渗透率值只占供液边界处渗透率值的 4 5 %左右 ;当地层压力下降 5MPa时 ,产量下降可达 13%左右。更多还原

【Abstract】 By experiment research,the pressure_sensitive effect in the development of low permeability oilfield is analyzed.The result shows that along with the oilfield’s developing going on,formation pressure will drop gradually,and then the oil reservoir pressure will be reduced,so pressure sensitivity hurt to formation will unavoidable.Eventually,effect of permeability loss on low permeability oil field developing is strong.Research result shows due to existence of pressure_sensitive effect,formation permeability value nearby well wall is only around the 45% of that in feed flow border.When formation pressure drops by 5 MPa,output will drop by 13% around.更多还原