基质酸化矿场评价的褶积法

针对基质酸化注酸过程中井筒附近区域产生的不稳定渗流，应用Ｄｕｈａｍｅｌ原理导出了求解不受酸蚀作用，模拟井底注入压力的相关式，给出了计算不同注酸时刻表皮因子变化的详细过程及应用实例，讨论了油井初始表皮因子和地层渗透率对基质酸化矿场评价结果的影响。应用注酸过程的井口压力和排量数据来计算了不同注酸时刻的表皮因子，以酸化作业实施就地监测和评价，有助于提高酸化效果和降低酸化成本。

A Convolution Method for Field Evaluation of Matrix Acidizing

In the light of the transient flow near a wellbore during matrix acidizing, an equation for simulating bottomhole pressure calculation is obtained by using the Duhamel theorem under the condition that there is no chemical reaction between injected acids and reservoir rocks An approach of real time skin calculation at any time of injecting acid is proposed and a field example of calculating skin factor is presented The effect of initial skin factor and formation permeability in an oil well on the evaluation results of matrix acidizing is discussed It is helpful to improve acidizing effect and reduce operational cost for calculating skin factor by applying the data of surface pressure and injection rate and to monitor and evaluate matrix acidizing in site