凝析气藏压力恢复试井分析的新认识

低于露点压力的凝析气藏的压力恢复曲线特征不同于高于露点压力的凝析气藏，文中根据三区域径向复合模型，将低于露点压力的凝析气藏压力恢复曲线的上翘解释为地层流体凝析饱和度的变化，内区为低凝析饱和度区，外区为原始流体凝析饱和度区，中间过渡带为高凝析饱和度区，而非传统的储层物性变化或部分渗透断层的影响，并结合矿场实例，说明其适用性。

THE NEW RECOGNITION OF BUILDUP WELL TEST ANALYSIS IN CONDENSATE GAS RESERVOIRS

The characteristics of buildup pressure curve below dewpoint is different from curve above dewpoint in condensate gas reservoirs.Based on a three-zone radial composite model,this paper describes the features of buildup curve,that is:upwarped district of pressure buildup curve below dewpoint as the change of condensate saturation for reservoir liquid,the inner-zone as lower condensate saturation,outer-zone as initial liquid condensate saturation,and the middle intermediate zone as higher condensate saturation,which is not affected by traditional change of reservoir physical character istics of part leaky fault.Meanwhile,in combination with the field example,the paper illustrates the curve's applicability.