低渗透气藏水平井酸化模拟研究

Modeling study of horizontal well acidizing in low-permeability gas reservoir

低渗透气藏储层由于存在基础孔渗条件差,非均质性强等特点,通常需要进行酸化、压裂等处理手段来提高流体在储层中的流动能力。为了合理利用酸化手段,尽可能提高酸化效果,进行低渗透气藏的酸化研究就显得非常重要。本文分析了低渗透气藏的酸化改造目标,建立了水平井酸化模拟数学模型。得到了水平井酸化压力场与流速场分布,并对低渗透气藏水平井的酸化过程进行了相应的分析。为低渗透气藏水平井的酸化设计提供了一定的理论参考。

Low-permeability gas reservoirs are characterized by low permeability, low porosity and strong heterogeneity. Acidizing or fracturing are always needed to improve the fluid flowing capacity in reservoir. The study of acidizing in low-permeability gas reservoir is of great importance to make rational use of acidizing and get better acidizing effect. In this study, reformable goal of acidizing was analyzed and mathematical model of horizontal well acidizing was developed as well. As a result of this study, pressure field and velocity field of horizontal well acidizing was obtained, analytical investigation of acidizing in low-permeability gas reservoir was carried out as well. This study can provide theory evidence for the learning horizontal well acidizing in low-permeability gas reservoir.