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由于凝析油气藏相态变化机理特殊,凝析油气井试井分析目前属世界性的试井分析难题,也是试井理论界的研究前沿和攻关方向。凝析油析出对绝对渗透率和气相相对渗透率有复杂影响,其中涉及多种因素。对于多相渗流的数学问题,特别是试井过程所涉及的不稳定渗流问题,目前还没有较为严格意义上的解析解。本文从国内外研究凝析油气渗流机理,相态变化,试井模型和分析技术等方面综述,指出了凝析油气井试井分析的不足之处及研究方向。
Due to the special mechanism of the phase change of condensate reservoirs, the well test analysis of condensate wells is now a worldwide well test analysis problem, which is also the research frontier and key research direction of well test theory circles. Condensate precipitation has a complex effect on absolute and relative vapor permeability, which involves a number of factors. For the mathematical problems of multiphase seepage, especially the unsteady seepage problems involved in well testing, there is not a more rigorous analytical solution. This paper summarizes the mechanism of oil and gas seepage from condensate reservoirs, the change of phase state, the well test model and the analysis technology, and points out the shortcomings and research directions of well test analysis of condensate oil and gas wells.