曲堤油田储层敏感性研究

对曲堤油田岩石成分及流体性质进行了详细分析 ,通过储层敏感性流动试验对该区储层各种潜在敏感性进行了研究。结果表明 ,该区储层具有较强的水敏性、盐敏性和碱敏性 ,并具有弱酸敏性和无速敏—中等速敏性 ,各层段的潜在敏感性有明显的差别。分析了各种敏感性的成因机制 ,采取降低钻井液密度、使用矿化度与原始地层水一致的完井液及 1.2 %的P - 2 16防膨剂等措施可以抑制储层敏感性 ,取得了较好的油田应用效果。

Study on Reservoir Sensitivity of Qudi Oilfield

The rock ingredient and fluid properties of Qudi oilfield are analyzed. All kinds of potential sensitivities of reservoir are researched on fluid now experiment. The result shows that there exist strong water sensitivity, salt sensitivity, alkali sensitivity and other weak sensitivity in the reservoir. The different layers have differential sensitivities. Some measures for reservoir protection, such as reduction of drilling density, application of completion fluid with the similar salinity to formation water, usage of P 216 inhibitive drilling fluid, are taken in differential reservoirs. The good results have been obtained during oilfield development.